| GOID Link to GO |
Functional Category | Description | Protein Count link to protein list |
|---|---|---|---|
| GO:0005789 | endoplasmic reticulum membrane | The lipid bilayer surrounding the endoplasmic reticulum. | 685 |
| GO:0005791 | rough endoplasmic reticulum | The rough (or granular) endoplasmic reticulum (ER) has ribosomes adhering to the outer surface; the ribosomes are the site of translation of the mRNA for those proteins which are either to be retained within the cisternae (ER-resident proteins), the proteins of the lysosomes, or the proteins destined for export from the cell. Glycoproteins undergo their initial glycosylation within the cisternae. | 149 |
| GO:0030176 | integral to endoplasmic reticulum membrane | Penetrating at least one phospholipid bilayer of an endoplasmic reticulum membrane. May also refer to the state of being buried in the bilayer with no exposure outside the bilayer. | 144 |
| GO:0005788 | endoplasmic reticulum lumen | The volume enclosed by the membranes of the endoplasmic reticulum. | 99 |
| GO:0071782 | endoplasmic reticulum tubular network | An endoplasmic reticulum part that comprises the membranes with high curvature in cross-section. | 97 |
| GO:0016529 | sarcoplasmic reticulum | A fine reticular network of membrane-limited elements that pervades the sarcoplasm of a muscle cell; continuous over large portions of the cell and with the nuclear envelope; that part of the endoplasmic reticulum specialized for calcium release, uptake and storage. | 89 |
| GO:0044432 | endoplasmic reticulum part | Any constituent part of the endoplasmic reticulum, the irregular network of unit membranes, visible only by electron microscopy, that occurs in the cytoplasm of many eukaryotic cells. The membranes form a complex meshwork of tubular channels, which are often expanded into slitlike cavities called cisternae. | 47 |
| GO:0042406 | extrinsic to endoplasmic reticulum membrane | Loosely bound to one surface of the endoplasmic reticulum membrane, but not integrated into the hydrophobic region. | 39 |
| GO:0071458 | integral to cytosolic side of endoplasmic reticulum membrane | Penetrating at least one phospholipid bilayer of the endoplasmic reticulum membrane, with the bulk of the gene product located on the side that faces the cytosol. | 33 |
| GO:0031227 | intrinsic to endoplasmic reticulum membrane | Located in the endoplasmic reticulum membrane such that some covalently attached portion of the gene product, for example part of a peptide sequence or some other covalently attached group such as a GPI anchor, spans or is embedded in one or both leaflets of the membrane. | 33 |
| GO:0034099 | luminal surveillance complex | A multiprotein complex that recognizes ERAD-luminal misfolded substrates and brings them to the ubiquitination/extraction machinery. In yeast, this complex consists of Yos9p, Kar2p and Hrd3p proteins. | 31 |
| GO:0034663 | endoplasmic reticulum chaperone complex | A protein complex that is located in the endoplasmic reticulum and is composed of chaperone proteins, including BiP, GRP94; CaBP1, protein disulfide isomerase (PDI), ERdj3, cyclophilin B, ERp72, GRP170, UDP-glucosyltransferase, and SDF2-L1. | 31 |
| GO:0071556 | integral to lumenal side of endoplasmic reticulum membrane | Penetrating at least one phospholipid bilayer of the endoplasmic reticulum membrane, with the bulk of the gene product located on the side that faces the lumen. | 23 |
| GO:0042824 | MHC class I peptide loading complex | A large, multisubunit complex which consists of the MHC class I-beta 2 microglobulin dimer, the transporter associated with antigen presentation (TAP), tapasin (an MHC-encoded membrane protein), the chaperone calreticulin and the thiol oxidoreductase ERp57. Functions in the assembly of peptides with newly synthesized MHC class I molecules. | 20 |
| GO:0034098 | Cdc48p-Npl4p-Ufd1p AAA ATPase complex | A multiprotein ATPase complex required for the efficient dislocation of ER-lumenal degradation substrates, and their subsequent proteolysis by the proteasome. In budding yeast, this complex includes Cdc48p, Npl4p and Ufd1p proteins. | 20 |
| GO:0033017 | sarcoplasmic reticulum membrane | The lipid bilayer surrounding the sarcoplasmic reticulum. | 19 |
| GO:0032541 | cortical endoplasmic reticulum | A cortical network of highly dynamic tubules that are juxtaposed to the plasma membrane and undergo ring closure and tubule-branching movements. | 18 |
| GO:0005790 | smooth endoplasmic reticulum | The smooth endoplasmic reticulum (smooth ER or SER) has no ribosomes attached to it. The smooth ER is the recipient of the proteins synthesized in the rough ER. Those proteins to be exported are passed to the Golgi complex, the resident proteins are returned to the rough ER and the lysosomal proteins after phosphorylation of their mannose residues are passed to the lysosomes. Glycosylation of the glycoproteins also continues. The smooth ER is the site of synthesis of lipids, including the phospholipids. The membranes of the smooth ER also contain enzymes that catalyze a series of reactions to detoxify both lipid-soluble drugs and harmful products of metabolism. Large quantities of certain compounds such as phenobarbital cause an increase in the amount of the smooth ER. | 17 |
| GO:0014802 | terminal cisterna | The portion of sarcoplasmic reticulum devoted to calcium ion storage and calcium ion release. | 17 |
| GO:0000837 | Doa10p ubiquitin ligase complex | A multiprotein complex that recognizes and ubiquitinates membranes proteins with misfolded cytosolic domains during ER-associated protein degradation (ERAD). In S. cerevisiae, this complex contains the ubiquitin ligase Ssm4p/Doa10p. | 16 |
| GO:0097038 | perinuclear endoplasmic reticulum | The portion of endoplasmic reticulum, the intracellular network of tubules and cisternae, that occurs near the nucleus. The lumen of the perinuclear endoplasmic reticulum is contiguous with the nuclear envelope lumen (also called perinuclear space), the region between the inner and outer nuclear membranes. | 15 |
| GO:0072546 | ER membrane protein complex | A transmembrane protein complex that is involved in protein folding in the endoplasmic reticulum. In S. cerevisiae, it has six members: EMC1, EMC2, AIM27, EMC4, KRE27, and EMC6. | 14 |
| GO:0008250 | oligosaccharyltransferase complex | A protein complex that is found in the endoplasmic reticulum membrane of eukaryotes and transfers lipid-linked oligosaccharide precursor to asparagine residues on nascent proteins. In yeast, the complex includes at least nine different subunits, whereas in mammalian cells at least three different forms of the complex have been detected. | 14 |
| GO:0030868 | smooth endoplasmic reticulum membrane | The lipid bilayer surrounding the smooth endoplasmic reticulum. | 12 |
| GO:0070971 | endoplasmic reticulum exit site | An endoplasmic reticulum part at which COPII-coated vesicles are produced. | 11 |
| GO:0033018 | sarcoplasmic reticulum lumen | The volume enclosed by the membranes of the sarcoplasmic reticulum. | 11 |
| GO:0035339 | SPOTS complex | A multiprotein complex at least composed of serine palmitoyltransferases and ORM proteins (known as ORMDL proteins in mammals and other higher vertebrates) that plays a key role in sphingolipid homeostasis. | 11 |
| GO:0005784 | Sec61 translocon complex | A translocon complex that contains a core heterotrimer of conserved alpha, beta and gamma subunits, and may contain additional proteins (translocon-associated proteins or TRAPs); in budding yeast the core proteins are Sec61p, Sbh1p, and Sss1p. The Sec61 translocon complex functions in cotranslational and posttranslational translocation events. | 10 |
| GO:0071261 | Ssh1 translocon complex | A translocon complex that contains a core heterotrimer of alpha, beta and gamma subunits, and may contain additional proteins (translocon-associated proteins or TRAPs); in budding yeast the core proteins are Ssh1p, Sbh2p, and Sss1p. The Ssh1 translocon complex is involved in the cotranslational pathway of protein transport across the ER membrane, and recognizes proteins bearing strongly hydrophobic signal sequences. | 8 |
| GO:0030867 | rough endoplasmic reticulum membrane | The lipid bilayer surrounding the rough endoplasmic reticulum. | 8 |
| GO:0005787 | signal peptidase complex | A protein complex that is located in the endoplasmic reticulum membrane and cleaves the signal sequence from precursor proteins following their transport out of the cytoplasmic space. | 7 |
| GO:0042765 | GPI-anchor transamidase complex | An enzyme complex which in humans and yeast consists of at least five proteins; for example, the complex contains GAA1, GPI8, PIG-S, PIG-U, and PIG-T in human, and Gaa1p, Gab1p, Gpi8p, Gpi16p, and Gpi17p in yeast. Catalyzes the posttranslational attachment of the carboxyl-terminus of a precursor protein to a GPI-anchor. | 6 |
| GO:0000506 | glycosylphosphatidylinositol-N-acetylglucosaminyltransferase (GPI-GnT) complex | An enzyme complex that catalyzes the transfer of GlcNAc from UDP-GlcNAc to an acceptor phosphatidylinositol, the first step in the production of GPI anchors for cell surface proteins. The complex contains PIG-A, PIG-C, PIG-H, PIG-Q, PIG-P, and DPM2 in human, and Eri1p, Gpi1p, Gpi2p, Gpi15p, Gpi19p, and Spt14p in budding yeast. | 4 |
| GO:0031205 | endoplasmic reticulum Sec complex | An endoplasmic reticulum membrane-associated complex involved in the translocation of proteins that are targeted to the ER. In yeast, this complex consists of two subcomplexes, namely, the Sec61 complex and the Sec62/Sec63 complex. | 3 |
| GO:0017177 | glucosidase II complex | A heterodimeric complex that catalyzes the trimming of glucose residues from N-linked core glycans on newly synthesized glycoproteins. | 2 |
| GO:0043529 | GET complex | A multisubunit complex involved in ER/Golgi trafficking (Golgi to ER Traffic). In yeast, includes Get1p, Get2p and Get3p proteins. | 2 |
| GO:0032865 | ERMES complex | A protein complex that links the endoplasmic reticulum with mitochondria and may have a role in promoting exchange of calcium and phospholipids between the two organelles. The complex is also associated with actively replicating mitochondrial DNA nucleoids, and may further coordinate mitochondrial genome replication and membrane growth. | 2 |
| GO:0043541 | UDP-N-acetylglucosamine transferase complex | A multienzyme, heterooligomeric complex involved in dolichyl-linked oligosaccharide synthesis. In yeast the complex is composed of Alg7p, which catalyzes the first step (GlcNAc1-PP-Dol from dolichol-phosphate and UDP-GlcNAc), and Alg13p plus Alg14p, the catalytic and anchoring subunits respectively, which together catalyze the second step (GlcNAc2-PP-dolichol from GlcNAc1-PP-Dol and UDP-GlcNAc) of dolichyl-linked oligosaccharide synthesis. | 2 |
| GO:0017059 | serine C-palmitoyltransferase complex | An enzyme complex that catalyzes the transfer of a palmitoyl on to serine, forming 3-dehydro-D-sphinganine. | 1 |
| GO:0009923 | fatty acid elongase complex | A tetrameric complex of four different subunits which catalyzes the elongation of fatty acids chains 2 carbon units at a time in the synthesis of very long chain fatty acids. | 1 |
| GO:0005785 | signal recognition particle receptor complex | A transmembrane heterodimeric protein located in the membrane of the rough endoplasmic reticulum. Both subunits contain GTPase domains with which signal recognition particle interacts. In the presence of GTP and SRP receptor, SRP is released from the ribosome-nascent chain complex. | 1 |