| GOID Link to GO |
Functional Category | Description | Protein Count link to protein list |
|---|---|---|---|
| GO:0005730 | nucleolus | A small, dense body one or more of which are present in the nucleus of eukaryotic cells. It is rich in RNA and protein, is not bounded by a limiting membrane, and is not seen during mitosis. Its prime function is the transcription of the nucleolar DNA into 45S ribosomal-precursor RNA, the processing of this RNA into 5.8S, 18S, and 28S components of ribosomal RNA, and the association of these components with 5S RNA and proteins synthesized outside the nucleolus. This association results in the formation of ribonucleoprotein precursors; these pass into the cytoplasm and mature into the 40S and 60S subunits of the ribosome. | 3847 |
| GO:0005654 | nucleoplasm | That part of the nuclear content other than the chromosomes or the nucleolus. | 651 |
| GO:0071013 | catalytic step 2 spliceosome | A spliceosomal complex that contains three snRNPs, including U5, bound to a splicing intermediate in which the first catalytic cleavage of the 5' splice site has occurred. The precise subunit composition differs significantly from that of the catalytic step 1, or activated, spliceosome, and includes many proteins in addition to those found in the associated snRNPs. | 515 |
| GO:0005635 | nuclear envelope | The double lipid bilayer enclosing the nucleus and separating its contents from the rest of the cytoplasm; includes the intermembrane space, a gap of width 20-40 nm (also called the perinuclear space). | 433 |
| GO:0071011 | precatalytic spliceosome | A spliceosomal complex that is formed by the recruitment of a preassembled U5-containing tri-snRNP to the prespliceosome. Although all 5 snRNPs are present, the precatalytic spliceosome is catalytically inactive. The precatalytic spliceosome includes many proteins in addition to those found in the associated snRNPs. | 399 |
| GO:0000790 | nuclear chromatin | The ordered and organized complex of DNA, protein, and sometimes RNA, that forms the chromosome in the nucleus. | 288 |
| GO:0031981 | nuclear lumen | The volume enclosed by the nuclear inner membrane. | 284 |
| GO:0044428 | nuclear part | Any constituent part of the nucleus, a membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. | 195 |
| GO:0005681 | spliceosomal complex | Any of a series of ribonucleoprotein complexes that contain RNA and small nuclear ribonucleoproteins (snRNPs), and are formed sequentially during the splicing of a messenger RNA primary transcript to excise an intron. | 111 |
| GO:0001673 | male germ cell nucleus | The nucleus of a male germ cell, a reproductive cell in males. | 111 |
| GO:0016363 | nuclear matrix | The dense fibrillar network lying on the inner side of the nuclear membrane. | 109 |
| GO:0008180 | signalosome | A protein complex that catalyzes the deneddylation of proteins, including the cullin component of SCF ubiquitin E3 ligase; deneddylation increases the activity of cullin family ubiquitin ligases. The signalosome is involved in many regulatory process, including some which control development, in many species; also regulates photomorphogenesis in plants; in many species its subunits are highly similar to those of the proteasome. | 106 |
| GO:0046540 | U4/U6 x U5 tri-snRNP complex | A ribonucleoprotein complex formed by the association of the U4/U6 and U5 small nuclear ribonucleoproteins. | 96 |
| GO:0000778 | condensed nuclear chromosome kinetochore | A multisubunit complex that is located at the centromeric region of a condensed chromosome in the nucleus and provides an attachment point for the spindle microtubules. | 95 |
| GO:0000794 | condensed nuclear chromosome | A highly compacted molecule of DNA and associated proteins resulting in a cytologically distinct structure that remains in the nucleus. | 94 |
| GO:0005680 | anaphase-promoting complex | A ubiquitin ligase complex that degrades mitotic cyclins and anaphase inhibitory protein, thereby triggering sister chromatid separation and exit from mitosis. Substrate recognition by APC occurs through degradation signals, the most common of which is termed the Dbox degradation motif, originally discovered in cyclin B. | 68 |
| GO:0005689 | U12-type spliceosomal complex | Any spliceosomal complex that forms during the splicing of a messenger RNA primary transcript to excise an intron; the series of U12-type spliceosomal complexes is involved in the splicing of the majority of introns that contain atypical AT-AC terminal dinucleotides, as well as other non-canonical introns. The entire splice site signal, not just the terminal dinucleotides, is involved in determining which spliceosome utilizes the site. | 66 |
| GO:0000795 | synaptonemal complex | A proteinaceous scaffold found between homologous chromosomes during meiosis. | 65 |
| GO:0000176 | nuclear exosome (RNase complex) | Complex of 3'-5' exoribonucleases found in the nucleus. | 57 |
| GO:0005682 | U5 snRNP | A ribonucleoprotein complex that contains small nuclear RNA U5. | 52 |
| GO:0031011 | Ino80 complex | A multisubunit protein complex that contains the Ino80p ATPase; exhibits chromatin remodeling activity and 3' to 5' DNA helicase activity. | 50 |
| GO:0035145 | exon-exon junction complex | A multi-subunit complex deposited by the spliceosome upstream of messenger RNA exon-exon junctions. The exon-exon junction complex provides a binding platform for factors involved in mRNA export and nonsense-mediated mRNA decay. | 49 |
| GO:0031298 | replication fork protection complex | A protein complex conserved in eukaryotes and associated with the replication fork; the complex stabilizes stalled replication forks and is thought to be involved in coordinating leading- and lagging-strand synthesis and in replication checkpoint signaling. | 46 |
| GO:0000780 | condensed nuclear chromosome, centromeric region | The region of a condensed chromosome in the nucleus that includes the centromere and associated proteins, including the kinetochore. In monocentric chromosomes, this region corresponds to a single area of the chromosome, whereas in holocentric chromosomes, it is evenly distributed along the chromosome. | 45 |
| GO:0000812 | Swr1 complex | A multisubunit protein complex that is involved in chromatin remodeling. It is required for the incorporation of the histone variant H2AZ into chromatin. In S. cerevisiae, the complex contains Swr1p, a Swi2/Snf2-related ATPase, and 12 additional subunits. | 42 |
| GO:0019907 | cyclin-dependent protein kinase activating kinase holoenzyme complex | A protein complex that phosphorylates cyclin-dependent kinases such as Cdc2 on Thr161 (or an equivalent residue); contains a catalytic subunit and a regulatory subunit, and some examples also include an assembly factor. | 40 |
| GO:0005685 | U1 snRNP | A ribonucleoprotein complex that contains small nuclear RNA U1. | 40 |
| GO:0000788 | nuclear nucleosome | A complex comprised of DNA wound around a multisubunit core and associated proteins, which forms the primary packing unit of DNA in the nucleus into higher order structures. | 39 |
| GO:0005688 | U6 snRNP | A ribonucleoprotein complex that contains small nuclear RNA U6. | 39 |
| GO:0005726 | perichromatin fibrils | Structures of variable diameter visible in the nucleoplasm by electron microscopy, mainly observed near the border of condensed chromatin. The fibrils are enriched in RNA, and are believed to be sites of pre-mRNA splicing and polyadenylylation representing the in situ form of nascent transcripts. | 35 |
| GO:0071001 | U4/U6 snRNP | A ribonucleoprotein complex that contains base-paired U4 and U6 small nuclear RNAs. | 35 |
| GO:0005720 | nuclear heterochromatin | A condensed form of chromatin, occurring in the nucleus during interphase, that stains strongly with basophilic dyes. The DNA of heterochromatin is typically replicated at a later stage in the cell-division cycle than euchromatin. | 34 |
| GO:0000346 | transcription export complex | The transcription export (TREX) complex couples transcription elongation by RNA polymerase II to mRNA export. The complex associates with the polymerase and travels with it along the length of the transcribed gene. TREX is composed of the THO transcription elongation complex as well as other proteins that couple THO to mRNA export proteins. The TREX complex is known to be found in a wide range of eukaryotes, including S. cerevisiae and metazoans. | 34 |
| GO:0005880 | nuclear microtubule | Any microtubule in the nucleus of a cell. | 33 |
| GO:0019908 | nuclear cyclin-dependent protein kinase holoenzyme complex | Cyclin-dependent protein kinase (CDK) complex found in the nucleus. | 33 |
| GO:0005652 | nuclear lamina | The fibrous, electron-dense layer lying on the nucleoplasmic side of the inner membrane of a cell nucleus, composed of lamin filaments. The polypeptides of the lamina are thought to be concerned in the dissolution of the nuclear envelope and its re-formation during mitosis. The lamina is composed of lamin A and lamin C filaments cross-linked into an orthogonal lattice, which is attached via lamin B to the inner nuclear membrane through interactions with a lamin B receptor, an IFAP, in the membrane. | 31 |
| GO:0044454 | nuclear chromosome part | Any constituent part of a nuclear chromosome, a chromosome found in the nucleus of a eukaryotic cell. | 31 |
| GO:0031519 | PcG protein complex | A chromatin-associated multiprotein complex containing Polycomb Group proteins. In Drosophila, Polycomb group proteins are involved in the long-term maintenance of gene repression, and PcG protein complexes associate with Polycomb group response elements (PREs) in target genes to regulate higher-order chromatin structure. | 31 |
| GO:0070603 | SWI/SNF superfamily-type complex | A protein complex that contains an ortholog of the Saccharomyces ATPase Swi2/Snf2 as one of the core components and mediates assembly of nucleosomes, changes to the spacing or structure of nucleosomes, or some combination of those activities in a manner that requires ATP. | 30 |
| GO:0071004 | U2-type prespliceosome | A spliceosomal complex that is formed by association of the 5' splice site with the U1 snRNP, while the branch point sequence is recognized by the U2 snRNP. The prespliceosome includes many proteins in addition to those found in the U1 and U2 snRNPs. Commitment to a given pair of 5' and 3' splice sites occurs at the time of prespliceosome formation. | 30 |
| GO:0005719 | nuclear euchromatin | The dispersed less dense form of chromatin in the interphase nucleus. It exists in at least two forms, a some being in the form of transcriptionally active chromatin which is the least condensed, while the rest is inactive euchromatin which is more condensed than active chromatin but less condensed than heterochromatin. | 29 |
| GO:0000228 | nuclear chromosome | A chromosome found in the nucleus of a eukaryotic cell. | 28 |
| GO:0016533 | cyclin-dependent protein kinase 5 holoenzyme complex | A protein complex that activates cyclin-dependent kinase 5; composed of regulatory and catalytic subunits. | 28 |
| GO:0031618 | nuclear centromeric heterochromatin | A region of heterochromatin located near the centromere of a chromosome in the nucleus. | 27 |
| GO:0071942 | XPC complex | A nucleotide-excision repair complex that is involved in damage sensing during global genome nucleotide excision repair (GG-NER). It is part of the pre-incision (or initial recognition) complex bound to sites of DNA damage. In human, it is composed of XPC, RAD23B and CETN2. | 26 |
| GO:0000439 | core TFIIH complex | The 5 subunit core of TFIIH that has tightly associated subunits and is found in both the general transcription factor holo-TFIIH and in the nucleotide-excision repair factor 3 complex. In S. cerevisiae, it is composed of Rad3, Tfb1, Tfb2, Ssl1, Tfb4. In humans, it is composed of XPD, p62, p55, p44, p34. | 26 |
| GO:0043596 | nuclear replication fork | The Y-shaped region of a nuclear replicating DNA molecule, resulting from the separation of the DNA strands and in which the synthesis of new strands takes place. Also includes associated protein complexes. | 26 |
| GO:0001939 | female pronucleus | The pronucleus originating from the ovum that is being fertilized. | 26 |
| GO:0001740 | Barr body | A structure found in a female mammalian cell containing an unpaired X chromosome that has become densely heterochromatic, silenced and localized at the nuclear periphery. | 24 |
| GO:0005687 | U4 snRNP | A ribonucleoprotein complex that contains small nuclear RNA U4. | 23 |
| GO:0034399 | nuclear periphery | The portion of the nuclear lumen proximal to the inner nuclear membrane. | 23 |
| GO:0005724 | nuclear telomeric heterochromatin | Heterochromatic regions of the chromosome found at the telomeres of a chromosome in the nucleus. | 22 |
| GO:0043078 | polar nucleus | Either of two nuclei located centrally in a flowering plant embryo sac that eventually fuse to form the endosperm nucleus. | 20 |
| GO:0031595 | nuclear proteasome complex | A proteasome found in the nucleus of a cell. | 19 |
| GO:0090544 | BAF-type complex | A SWI/SNF-type complex that contains a subunit from the BAF (Brahma-Associated Factor) family. | 17 |
| GO:0032806 | carboxy-terminal domain protein kinase complex | A protein complex that phosphorylates amino acid residues of RNA polymerase II C-terminal domain repeats; phosphorylation occurs mainly on Ser2 and Ser5. | 17 |
| GO:0070390 | transcription export complex 2 | A protein complex that couples SAGA-dependent gene expression to mRNA export at the inner side of the nuclear pore complex (NPC). The TREX-2 complex is tethered to the inner side of the NPC via the nucleoporins Nup1 and Nup60; in S. cerevisiae it contains Sac3p, Thp1p, Sus1p and Cdc31p. | 17 |
| GO:0000112 | nucleotide-excision repair factor 3 complex | One of several protein complexes involved in nucleotide-excision repair; possesses endodeoxynuclease and DNA helicase activities. In S. cerevisiae, it is composed of Rad2p and the core TFIIH-Ssl2p complex (Core TFIIH is composed of Rad3p, Tfb1p, Tfb2p, Ssl1p, and Tfb4p. Note that Ssl2p is also called Rad25p). | 17 |
| GO:0005686 | U2 snRNP | A ribonucleoprotein complex that contains small nuclear RNA U2. | 16 |
| GO:0008622 | epsilon DNA polymerase complex | A heterotetrameric DNA polymerase complex that catalyzes processive DNA synthesis in the absence of PCNA, but is further stimulated in the presence of PCNA. The complex contains a large catalytic subunit and three small subunits, and is best characterized in Saccharomyces, in which the subunits are named Pol2p, Dpb2p, Dpb3p, and Dpb4p. Some evidence suggests that DNA polymerase epsilon is the leading strand polymerase; it is also involved in nucleotide-excision repair and mismatch repair. | 16 |
| GO:0032301 | MutSalpha complex | A heterodimer involved in the recognition and repair of base-base and small insertion/deletion mismatches. In human the complex consists of two subunits, MSH2 and MSH6. | 16 |
| GO:0016514 | SWI/SNF complex | A SWI/SNF-type complex that contains nine or more proteins, including both conserved (core) and nonconserved components; the Swi2/Snf2 ATPase is one of the core components. | 15 |
| GO:0048555 | generative cell nucleus | The nucleus of the generative cell, a cell contained within the pollen grain that will divide to produce two haploid sperm cells. | 15 |
| GO:0000152 | nuclear ubiquitin ligase complex | A ubiquitin ligase complex found in the nucleus. | 15 |
| GO:0042405 | nuclear inclusion body | An intranuclear focus at which aggregated proteins have been sequestered. | 14 |
| GO:0043073 | germ cell nucleus | The nucleus of a germ cell, a reproductive cell in multicellular organisms. | 14 |
| GO:0045120 | pronucleus | The nucleus of either the ovum or the spermatozoon following fertilization. Thus, in the fertilized ovum, there are two pronuclei, one originating from the ovum, the other from the spermatozoon that brought about fertilization; they approach each other, but do not fuse until just before the first cleavage, when each pronucleus loses its membrane to release its contents. | 13 |
| GO:0005683 | U7 snRNP | A ribonucleoprotein complex that contains the U7 snRNA and is required for the 3'-end processing of replication-dependent histone pre-mRNAs. | 13 |
| GO:0000419 | DNA-directed RNA polymerase V complex | RNA polymerase V is a multisubunit RNA polymerase complex found in the nucleus of plants and involved in accumulation of siRNAs and in DNA methylation-dependent silencing of endogenous repeated sequences. Pol V is composed of subunits that are paralogous or identical to the 12 subunits of Pol II. Two large subunits comprise the most conserved portion including the catalytic site and share similarity with other eukaryotic and bacterial multisubunit RNA polymerases. The second largest subunit is also found in RNA polymerase IVa, while the largest subunit is found only in the IVa complex and contains an extended C-terminal domain (CTD) that includes multiple repeats of a 16 amino-acid consensus sequence as well as other sequences. The remainder of the complex is composed of smaller subunits. | 13 |
| GO:0033167 | ARC complex | A ribonucleoprotein complex that contains members of the Argonaute family of proteins, additional protein subunits, and duplex siRNA; required for heterochromatin assembly and siRNA generation. Possibly involved in the conversion of ds siRNA to ss siRNA. | 12 |
| GO:0030958 | RITS complex | A protein complex required for heterochromatin assembly; contains an Argonaute homolog, a chromodomain protein, and at least one additional protein; named for RNA-induced initiation of transcriptional gene silencing. | 12 |
| GO:0016589 | NURF complex | An ISWI complex that contains an ATPase subunit of the ISWI family (SNF2L in mammals), a NURF301 homolog (BPTF in humans), and additional subunits, though the composition of these additional subunits varies slightly with species. NURF is involved in regulation of transcription from TRNA polymerase II promoters. | 11 |
| GO:0033597 | mitotic checkpoint complex | A multiprotein complex that functions as a mitotic checkpoint inhibitor of the anaphase-promoting complex/cyclosome (APC/C). In budding yeast this complex consists of Mad2p, Mad3p, Bub3p and Cdc20p, and in mammalian cells it consists of MAD2, BUBR1, BUB3, and CDC20. | 11 |
| GO:0005677 | chromatin silencing complex | Any protein complex that mediates changes in chromatin structure that result in transcriptional silencing. | 10 |
| GO:0005658 | alpha DNA polymerase:primase complex | A complex of four polypeptides, comprising large and small DNA polymerase alpha subunits and two primase subunits, which catalyzes the synthesis of an RNA primer on the lagging strand of replicating DNA; the smaller of the two primase subunits alone can catalyze oligoribonucleotide synthesis. | 10 |
| GO:0016590 | ACF complex | An ISWI complex that contains an ATPase subunit of the ISWI family (SNF2H in mammals, Isw2 in S. cerevisiae), an ACF1 homolog, and generally no other subunits, though Xenopus is an exception with a third non-conserved subunit. ACF plays roles in regulation of RNA polymerase II transcription and in DNA replication and repair. | 10 |
| GO:0005638 | lamin filament | Any of a group of intermediate-filament proteins that form the fibrous matrix on the inner surface of the nuclear envelope. They are classified as lamins A, B and C. | 9 |
| GO:0030532 | small nuclear ribonucleoprotein complex | A complex composed of RNA of the small nuclear RNA (snRNA) class and protein, found in the nucleus of a eukaryotic cell. These are typically named after the snRNA(s) they contain, e.g. U1 snRNP or U4/U6 snRNP. Many, but not all, of these complexes are involved in splicing of nuclear mRNAs. | 9 |
| GO:0031499 | TRAMP complex | A multiprotein complex having distributive polyadenylation activity of a variety of RNA substrates including hypomodified and incorrectly folded tRNAs, pre-snRNAs, pre-snoRNAs, incorrectly spliced or processed pre-mRNAs, cryptic unstable transcripts (CUTs), pre-rRNAs and rRNA fragments released as part of rRNA processing. In S. cerevisiae, the complex consists of either Pap2 (also known as Trf4) or Trf5, Air1 or Air2, and Mtr4, and is involved in RNA 3'-end processing and in RNA surveillance and quality control. | 8 |
| GO:0000243 | commitment complex | A spliceosomal complex that is formed by association of the U1 snRNP with the 5' splice site of an unspliced intron in an RNA transcript. | 8 |
| GO:0071014 | post-mRNA release spliceosomal complex | A spliceosomal complex that is formed following the release of the spliced product from the post-spliceosomal complex and contains the excised intron and three snRNPs, including U5. | 8 |
| GO:0035060 | brahma complex | A SWI/SNF-type complex that contains the ATPase product of the Drosophila brahma gene, or an ortholog thereof. | 8 |
| GO:0043224 | nuclear SCF ubiquitin ligase complex | A ubiquitin ligase complex, located in the nucleus, in which a cullin from the Cul1 subfamily and a RING domain protein form the catalytic core; substrate specificity is conferred by a Skp1 adaptor and an F-box protein. SCF complexes are involved in targeting proteins for degradation by the proteasome. The best characterized complexes are those from yeast and mammals (with core subunits named Cdc53/Cul1, Rbx1/Hrt1/Roc1). | 7 |
| GO:0000111 | nucleotide-excision repair factor 2 complex | One of several protein complexes involved in nucleotide-excision repair; possesses damaged DNA binding activity. In S. cerevisiae, it is composed of Rad4p and Rad23p. | 7 |
| GO:0030998 | linear element | A proteinaceous scaffold associated with S. pombe chromosomes during meiotic prophase. Linear elements have a structure related to but not equivalent to the synaptonemal complex. | 7 |
| GO:0000800 | lateral element | A proteinaceous core found between sister chromatids during meiotic prophase. | 6 |
| GO:0000784 | nuclear chromosome, telomeric region | The terminal region of a linear chromosome in the nucleus that includes the telomeric DNA repeats and associated proteins. | 6 |
| GO:0044530 | supraspliceosomal complex | Multicomponent complex of RNA and proteins that is composed of four active spliceosomes, termed native spliceosomes, connected to each other by the pre-mRNA. The supraspliceosome is the nuclear machine where the pre-mRNA processing takes place, like the 5'-end capping, 3'-end cleavage, splicing and editing. | 6 |
| GO:0001739 | sex chromatin | A condensed mass of compacted chromatin that represents an inactivated X chromosome. | 6 |
| GO:0032545 | CURI complex | A protein complex that is involved in the transcription of ribosomal genes. In Saccharomyces this complex consists of Ckb2p, Utp22p, Rrp7p andIfh1p. | 6 |
| GO:0001940 | male pronucleus | The pronucleus originating from the spermatozoa that was involved in fertilization. | 5 |
| GO:0035102 | PRC1 complex | An insect multiprotein complex containing the products of many of the Polycomb Group genes including Polycomb, Posterior sex combs, polyhomeotic and Sex comb on midleg. The Polycomb Group proteins are required for stable long-term maintenance of transcriptionally repressed states and the PRC1 complex directly antagonizes ATP-dependent remodeling of nucleosomal arrays. | 5 |
| GO:0005662 | DNA replication factor A complex | A conserved heterotrimeric complex that binds nonspecifically to single-stranded DNA and is required for multiple processes in eukaryotic DNA metabolism, including DNA replication, DNA repair, and recombination. In all eukaryotic organisms examined the complex is composed of subunits of approximately 70, 30, and 14 kDa. | 5 |
| GO:0070209 | ASTRA complex | A protein complex that is part of the chromatin remodeling machinery; the acronym stands for ASsembly of Tel, Rvb and Atm-like kinase. In Saccharomyces cerevisiae this complex includes Rvb1p, Rvb2p, Tra1p, Tel2p, Asa1p, Ttilp and Tti2p. | 5 |
| GO:0031510 | SUMO activating enzyme complex | A conserved heterodimeric complex with SUMO activating enzyme activity. | 5 |
| GO:0071007 | U2-type catalytic step 2 spliceosome | A spliceosomal complex that contains the U2, U5 and U6 snRNPs bound to a splicing intermediate in which the first catalytic cleavage of the 5' splice site has occurred. The precise subunit composition differs significantly from that of the catalytic step 1, or activated, spliceosome, and includes many proteins in addition to those found in the U2, U5 and U6 snRNPs. | 5 |
| GO:0000942 | condensed nuclear chromosome outer kinetochore | The region of a condensed nuclear chromosome kinetochore most external to centromeric DNA; this outer region mediates kinetochore-microtubule interactions. | 5 |
| GO:0000442 | SSL2-core TFIIH complex portion of NEF3 complex | The SSL2-core TFIIH complex when it is part of the nucleotide-excision repair factor 3 (NEF3). It is composed of the tightly associated 5 subunit core TFIIH subcomplex plus one additional, less tighly associated subunit. The subunits are well conserved from yeast to humans. In S. cerevisiae, the 5-subunit core is composed of Rad3, Tfb1, Tfb2, Ssl1, Tfb4 and the loosely associated subunit is Ssl2p (also called Rad25). In humans, the 5 subunit core is composed of ERCC2, p62, p55, p44, p34 and the loosely associated subunit is XPB. | 4 |
| GO:0032389 | MutLalpha complex | A heterodimer involved in the recognition of base-base and small insertion/deletion mismatches. In human the complex consists of two subunits, MLH1 and PMS2. | 4 |
| GO:0097346 | INO80-type complex | A chromatin remodeling protein complex initially purified from S. cerevisiae and containing more than 10 subunits, including the SWR1-related complexes. INO80 (inositol requiring 80)-type complexes have diverse functions, including promoting transcriptional activation and DNA repair. | 4 |
| GO:0005712 | chiasma | A connection formed between chromatids, visible during meiosis, thought to be the point of the interchange involved in crossing-over. | 4 |
| GO:0005664 | nuclear origin of replication recognition complex | A multisubunit complex that is located at the replication origins of a chromosome in the nucleus. | 4 |
| GO:0071565 | nBAF complex | A SWI/SNF-type complex that is found in post-mitotic neurons, and in human contains actin and proteins encoded by the ARID1A/BAF250A or ARID1B/BAF250B, SMARCD1/BAF60A, SMARCD3/BAF60C, SMARCA2/BRM/BAF190B, SMARCA4/BRG1/BAF190A, SMARCB1/BAF47, SMARCC1/BAF155, SMARCE1/BAF57, SMARCC2/BAF170, DPF1/BAF45B, DPF3/BAF45C, ACTL6B/BAF53B genes. The nBAF complex along with CREST plays a role regulating the activity of genes essential for dendrite growth. | 4 |
| GO:0032807 | DNA ligase IV complex | A eukaryotically conserved protein complex that contains DNA ligase IV and is involved in DNA repair by non-homologous end joining; in addition to the ligase, the complex also contains XRCC4 or a homolog, e.g. Saccharomyces Lif1p. | 4 |
| GO:0032390 | MutLbeta complex | A heterodimer involved in the recognition of base-base and small insertion/deletion mismatches. In human the complex consists of two subunits, MLH1 and PMS1. | 3 |
| GO:0016586 | RSC complex | A protein complex similar to, but more abundant than, the Swi/Snf complex. The RSC complex is generally recruited to RNA polymerase III promoters and is specifically recruited to RNA polymerase II promoters by transcriptional activators and repressors; it is also involved in non-homologous end joining. | 3 |
| GO:0071564 | npBAF complex | A SWI/SNF-type complex that is found in neural stem or progenitor cells, and in human contains actin and proteins encoded by the ARID1A/BAF250A or ARID1B/BAF250B, SMARCD1/BAF60A, SMARCD3/BAF60C, SMARCA2/BRM/BAF190B, SMARCA4/BRG1/BAF190A, SMARCB1/BAF47, SMARCC1/BAF155, SMARCE1/BAF57, SMARCC2/BAF170, PHF10/BAF45A, ACTL6A/BAF53A genes. The npBAF complex is essential for the self-renewal/proliferative capacity of the multipotent neural stem cells. | 3 |
| GO:0005697 | telomerase holoenzyme complex | Telomerase is a ribonucleoprotein enzyme complex, with a minimal catalytic core composed of a catalytic reverse transcriptase subunit and an RNA subunit that provides the template for telomeric DNA addition. In vivo, the holoenzyme complex often contains additional subunits. | 3 |
| GO:0055029 | nuclear DNA-directed RNA polymerase complex | A protein complex, located in the nucleus, that possesses DNA-directed RNA polymerase activity. | 2 |
| GO:0000214 | tRNA-intron endonuclease complex | A protein complex that catalyzes the endonucleolytic cleavage of pre-tRNA, producing 5'-hydroxyl and 2',3'-cyclic phosphate termini, and specifically removing the intron. | 2 |
| GO:0070693 | P-TEFb-cap methyltransferase complex | A protein complex that is formed by the association of positive transcription elongation factor complex b (P-TEFb) with the mRNA capping methyltransferase. | 2 |
| GO:0043564 | Ku70:Ku80 complex | Heterodimeric protein complex composed of a 70 kDa and a 80 kDa subunit, binds DNA through a channel formed by the heterodimer. Functions in DNA double stranded break repair, chromosome maintenance, transcription regulation, V(D)J recombination, and activation of DNA-PK. | 2 |
| GO:0032302 | MutSbeta complex | A heterodimer involved in binding to and correcting insertion/deletion mutations. In human the complex consists of two subunits, MSH2 and MSH3. | 2 |
| GO:0035059 | RCAF complex | A protein complex that facilitates the assembly of nucleosomes on to newly synthesized DNA. In Drosophila, the complex comprises ASF1 and histones H3 and H4. | 2 |
| GO:0033203 | DNA helicase A complex | A homohexameric protein complex that possesses DNA helicase activity; associates with DNA polymerase alpha-primase and translocates in the 5' to 3' direction. | 2 |
| GO:0043601 | nuclear replisome | A multi-component enzymatic machine at the nuclear replication fork, which mediates DNA replication. Includes DNA primase, one or more DNA polymerases, DNA helicases, and other proteins. | 2 |
| GO:0031380 | nuclear RNA-directed RNA polymerase complex | A complex required for RNAi mediated heterochromatin assembly. In S. pombe this contains RNA-directed RNA polymerase, a putative helicase and a protein containing a pap25 associated domain. | 2 |
| GO:0000798 | nuclear cohesin complex | A cohesin complex required for cohesion between sister chromatids that remain in the nucleus. | 2 |
| GO:0034991 | nuclear meiotic cohesin complex | A cohesin complex that mediates sister chromatid cohesion in the nucleus during meiosis; has a subunit composition distinct from that of the meiotic cohesin complex. | 1 |
| GO:0070531 | BRCA1-A complex | A protein complex that contains the BRCA1-BARD1 heterodimer, RAP80/UIMC1, BRCC3/BRCC36, BRE/BRCC45, FAM175A/CCDC98/Abraxas and MERIT40/NBA1, and specifically recognizes and binds K63-linked polyubiquitin chains present on histone H2A and H2AX at DNA damage sites. | 1 |
| GO:0000445 | THO complex part of transcription export complex | The THO complex when it is part of the TREX (TRanscription EXport) complex that is involved in coupling transcription to export of mRNAs to the cytoplasm. In S. cerevisiae, it is composed of four subunits: Hpr1, Tho2, Thp1, and Mft1, while the human complex is composed of 7 subunits. | 1 |
| GO:0030870 | Mre11 complex | Trimeric protein complex that possesses endonuclease activity; involved in meiotic recombination, DNA repair and checkpoint signaling. In Saccharomyces cerevisiae, the complex comprises Mre11p, Rad50p, and Xrs2p; complexes identified in other species generally contain proteins orthologous to the Saccharomyces cerevisiae proteins. | 1 |
| GO:0042585 | germinal vesicle | The enlarged, fluid filled nucleus of a primary oocyte, the development of which is suspended in prophase I of the first meiotic division between embryohood and sexual maturity. | 1 |
| GO:0070557 | PCNA-p21 complex | A protein complex that contains the cyclin-dependent protein kinase inhibitor p21WAF1/CIP1 bound to PCNA; formation of the complex inhibits DNA replication. | 1 |
| GO:0005958 | DNA-dependent protein kinase-DNA ligase 4 complex | A large protein complex which is involved in the repair of DNA double-strand breaks and, in mammals, V(D)J recombination events. It consists of the DNA-dependent protein kinase catalytic subunit (DNA-PKcs), the DNA end-binding heterodimer Ku, the nuclear phosphoprotein XRCC4 or a homolog thereof, and DNA ligase IV. | 1 |
| GO:0043625 | delta DNA polymerase complex | A multimeric DNA polymerase enzyme complex which differs in composition amongst species; in humans it is a heterotetramer of four subunits of approximately 125, 50, 68 and 12kDa, while in S. cerevisiae, it has three different subunits which form a heterotrimer, and the active enzyme is a dimer of this heterotrimer. Functions in DNA replication, mismatch repair and excision repair. | 1 |
| GO:0070876 | SOSS complex | A protein complex that functions downstream of the MRN complex to promote DNA repair and the G2/M checkpoint. The SOSS complex associates with single-stranded DNA at DNA lesions and is composed of SOSS-B (SOSS-B1/OBFC2B or SOSS-B2/OBFC2A), SOSS-A/INTS3 and SOSS-C/C9orf80. | 1 |
| GO:0034990 | nuclear mitotic cohesin complex | A cohesin complex that mediates sister chromatid cohesion in the nucleus during mitosis; has a subunit composition distinct from that of the meiotic cohesin complex. | 1 |
| GO:0034064 | Tor2-Mei2-Ste11 complex | A protein complex that contains the transcription factor Ste11 and the RNA binding protein Mei2; involved in regulation of conjugation in fission yeast. | 1 |
| GO:0000109 | nucleotide-excision repair complex | Any complex formed of proteins that act in nucleotide-excision repair. | 1 |
| GO:0031213 | RSF complex | An ISWI complex that contains an ATPase subunit of the ISWI family (SNF2H in mammals) and an RSF1 homolog. It mediates nucleosome deposition and generates regularly spaced nucleosome arrays. In mammals, RSF is involved in regulation of transcription from RNA polymerase II promoters). | 1 |
| GO:0000783 | nuclear telomere cap complex | A complex of DNA and protein located at the end of a linear chromosome in the nucleus that protects and stabilizes a linear chromosome. | 1 |
| GO:0070552 | BRISC complex | A protein complex that contains the FAM175B/ABRO1, BRCC3/BRCC36, BRE/BRCC45 and MERIT40/NBA1 proteins, and specifically cleaves K63-linked polyubiquitin chains. | 1 |
| GO:0070274 | RES complex | A protein complex that is required for efficient splicing, and prevents leakage of unspliced pre-mRNAs from the nucleus (named for pre-mRNA REtention and Splicing). In Saccharomyces, the complex consists of Ist3p, Bud13p, and Pml1p. | 1 |
| GO:0090537 | CERF complex | An ISWI complex that contains an ATPase subunit of the ISWI family (specifically SNF2L in mammals, which contain two ISWI homologs) and a CECR2 homolog. In mammals, CERF is involved in regulation of transcription from RNA polymerase II promoters. | 1 |