Plays an important role in meiotic recombination. Stimulates DMC1-mediated strand exchange required for pairing homologous chromosomes during meiosis. The complex PSMC3IP/MND1 binds DNA, stimulates the recombinase activity of DMC1 as well as DMC1 D-loop formation from double-strand DNA. This complex stabilizes presynaptic RAD51 and DMC1 filaments formed on single strand DNA to capture double-strand DNA. This complex stimulates both synaptic and presynaptic critical steps in RAD51 and DMC1-promoted homologous pairing. May inhibit HIV-1 viral protein TAT activity and modulate the activity of proteasomes through association with PSMC3. Acts as a tissue specific coactivator of hormone-dependent transcription mediated by nuclear receptors. Homo sapiens (taxid: 9606)
>sp|O35047|HOP2_MOUSE Homologous-pairing protein 2 homolog OS=Mus musculus GN=Psmc3ip PE=1 SV=1
Plays an important role in meiotic recombination. Stimulates DMC1-mediated strand exchange required for pairing homologous chromosomes during meiosis. The complex PSMC3IP/MND1 binds DNA, stimulates the recombinase activity of DMC1 as well as DMC1 D-loop formation from double-strand DNA. This complex stabilizes presynaptic RAD51 and DMC1 filaments formed on single strand DNA to capture double-strand DNA. This complex stimulates both synaptic and presynaptic critical steps in RAD51 and DMC1-promoted homologous pairing. May inhibit HIV-1 viral protein TAT activity and modulate the activity of proteasomes through association with PSMC3.
Mus musculus (taxid: 10090)
>sp|Q63ZL2|HOP2_XENLA Homologous-pairing protein 2 homolog OS=Xenopus laevis GN=psmc3ip PE=2 SV=1
Plays an important role in meiotic recombination. Stimulates DMC1-mediated strand exchange required for pairing of homologous chromosomes during meiosis.
Xenopus laevis (taxid: 8355)
>sp|Q91ZY6|HOP2_RAT Homologous-pairing protein 2 homolog OS=Rattus norvegicus GN=Psmc3ip PE=1 SV=1
Plays an important role in meiotic recombination. Stimulates DMC1-mediated strand exchange required for pairing homologous chromosomes during meiosis. The complex PSMC3IP/MND1 binds DNA, stimulates the recombinase activity of DMC1 as well as DMC1 D-loop formation from double-strand DNA. This complex stabilizes presynaptic RAD51 and DMC1 filaments formed on single strand DNA to capture double-strand DNA. This complex stimulates both synaptic and presynaptic critical steps in RAD51 and DMC1-promoted homologous pairing. May inhibit HIV-1 viral protein TAT activity and modulate the activity of proteasomes through association with PSMC3 (By similarity). Plays a role as a coactivator in nuclear receptor-mediated transcription.
Rattus norvegicus (taxid: 10116)
>sp|Q9FX64|HOP2_ARATH Homologous-pairing protein 2 homolog OS=Arabidopsis thaliana GN=HOP2 PE=1 SV=1
>PF07106 TBPIP: Tat binding protein 1(TBP-1)-interacting protein (TBPIP); InterPro: IPR010776 This family consists of several eukaryotic TBP-1 interacting protein (TBPIP) sequences
TBP-1 has been demonstrated to interact with the human immunodeficiency virus type 1 (HIV-1) viral protein Tat, then modulate the essential replication process of HIV. In addition, TBP-1 has been shown to be a component of the 26S proteasome, a basic multiprotein complex that degrades ubiquitinated proteins in an ATP-dependent fashion. Human TBPIP interacts with human TBP-1 then modulates the inhibitory action of human TBP-1 on HIV-Tat-mediated transactivation [].
>PF07061 Swi5: Swi5; InterPro: IPR010760 This entry represents Swi5 and is involved in meiotic DNA repair synthesis and meiotic joint molecule formation []
It is known to interact with Swi2, Rhp51 and Swi6 [].
>PF03962 Mnd1: Mnd1 family; InterPro: IPR005647 This family of proteins includes meiotic nuclear division protein 1 (MND1) from Saccharomyces cerevisiae (Baker's yeast)
>PF10552 ORF6C: ORF6C domain; InterPro: IPR018878 This entry represents the carboxy-terminal domain from ORF6 (Q9B012 from SWISSPROT), an antirepressor protein from Lactococcus phage bIL285 []
>PF05008 V-SNARE: Vesicle transport v-SNARE protein N-terminus; InterPro: IPR007705 V-SNARE proteins are required for protein traffic between eukaryotic organelles
The v-SNAREs on transport vesicles interact with t-SNAREs on target membranes in order to facilitate this []. This domain is the N-terminal half of the V-Snare proteins. ; GO: 0006886 intracellular protein transport, 0016020 membrane; PDB: 2V8S_V 1VCS_A 3ONL_C 3ONJ_A 2QYW_A.
>PF01486 K-box: K-box region; InterPro: IPR002487 MADS genes in plants encode key developmental regulators of vegetative and reproductive development
The majority of the plant MADS proteins share a stereotypical MIKC structure. It comprises (from N- to C-terminal) an N-terminal domain, which is, however, present only in a minority of proteins; a MADS domain (see PDOC00302 from PROSITEDOC, IPR002100 from INTERPRO), which is the major determinant of DNA-binding but which also performs dimerisation and accessory factor binding functions; a weakly conserved intervening (I) domain, which constitutes a key molecular determinant for the selective formation of DNA-binding dimers; a keratin-like (K-box) domain, which promotes protein dimerisation; and a C-terminal (C) domain, which is involved in transcriptional activation or in the formation of ternary or quaternary protein complexes. The 80-amino acid K-box domain was originally identified as a region with low but significant similarity to a region of keratin, which is part of the coiled-coil sequence constituting the central rod-shaped domain of keratin [, , ]. The K-box protein-protein interaction domain which mediates heterodimerization of MIKC-type MADS proteins contains several heptad repeats in which the first and the fourth positions are occupied by hydrophobic amino acids suggesting that the K-box domain forms three amphipathic alpha-helices referred to as K1, K2, and K3 [].; GO: 0003700 sequence-specific DNA binding transcription factor activity, 0006355 regulation of transcription, DNA-dependent, 0005634 nucleus
>PF06698 DUF1192: Protein of unknown function (DUF1192); InterPro: IPR009579 This family consists of several short, hypothetical, bacterial proteins of around 60 residues in length
>PF05377 FlaC_arch: Flagella accessory protein C (FlaC); InterPro: IPR008039 Although archaeal flagella appear superficially similar to those of bacteria, they are quite distinct []
In several archaea, the flagellin genes are followed immediately by the flagellar accessory genes flaCDEFGHIJ. The gene products may have a role in translocation, secretion, or assembly of the flagellum. FlaC is a protein whose exact role is unknown but it has been shown to be membrane-associated (by immuno-blotting fractionated cells) [].
>PF05837 CENP-H: Centromere protein H (CENP-H); InterPro: IPR008426 Chromosome segregation in eukaryotes requires the kinetochore, a multi-protein structure that assembles on centromeric DNA, and which acts to link chromosomes to spindle microtubules
Kinetochore structure and composition is highly conserved among vertebrates. The inner kinetochore is essential for kinetochore assembly, and is involved in chromosome segregation via regulation of the spindle. Inner kinetochore components include the multi-subunit CENP-H/I complex, which may function, in part, in directing centromere protein A (CENP-A) deposition to centromeres, where CENP-A is a centromere-specific histone H3 variant required for the organisation of centromeric chromatin during interphase. The CENP-H/I complex contains three functional classes of proteins [, ]: CENP-H class (includes CENP-H, -I, -K, -L) CENP-M class (includes CENP-M) CENP-O class (includes CENP-O, -P, -Q, -R, -50) CENP-H is required for the localisation of CENP-C, but not CENP-A, to the centromere. However, it may be involved in the incorporation of newly synthesised CENP-A into centromeres via its interaction with the CENP-A/CENP-HI complex. CENP-H contains a coiled-coil structure and a nuclear localisation signal. CENP-H is specifically and constitutively localised in kinetochores throughout the cell cycle, and may play a role in kinetochore organisation and function throughout the cell cycle []. Studies show that CENP-H may be associated with certain human cancers [, ]. This entry also includes Kinetochore protein Fta3 which is a subunit of the Sim4 complex. This complex is required for loading the DASH complex onto the kinetochore via interaction with dad1. Fta2, Fta3 and Fta4 associate with the central core and inner repeat region of the centromere [].; GO: 0043515 kinetochore binding, 0007059 chromosome segregation, 0051301 cell division, 0000777 condensed chromosome kinetochore, 0005634 nucleus
>4i0x_A ESAT-6-like protein MAB_3112; structural genomics, PSI-2, protein structure initiative, in center for structure and function innovation; HET: BME GOL; 1.96A {Mycobacterium abscessus}
