ID:VPRBP_HUMAN DESCRIPTION: RecName: Full=Protein VPRBP; AltName: Full=DDB1- and CUL4-associated factor 1; AltName: Full=HIV-1 Vpr-binding protein; Short=VprBP; AltName: Full=Vpr-interacting protein; FUNCTION: Component of the CUL4A-RBX1-DDB1-VprBP/DCAF1 E3 ubiquitin-protein ligase complex, VprBP/DCAF1 may function as the substrate recognition module within this complex. For example, VprBP/DCAF1 targets NF2 to the E3 ubiquitin-ligase complex for ubiquitination and subsequent proteasome-dependent degradation. In case of infection by HIV-1 virus, it is recruited by HIV-1 Vpr in order to hijack the CUL4A-RBX1-DDB1 function leading to arrest the cell cycle in G2 phase, and also to protect the viral protein from proteasomal degradation by another E3 ubiquitin ligase. In case of infection by HIV-2 virus, it is recruited by HIV-2 Vpx in order to hijack the CUL4A-RBX1-DDB1 function leading to enhanced efficiency of macrophage infection and promotion of the replication of cognate primate lentiviruses in cells of monocyte/macrophage lineage. Associated with chromatin in a DDB1-independent and cell cycle-dependent manner, VprBP/DCAF1 is recruited to chromatin as DNA is being replicated and is released from chromatin before mitosis. PATHWAY: Protein modification; protein ubiquitination. SUBUNIT: Component of the CUL4A-RBX1-DDB1-VprBP/DCAF1 E3 ubiquitin-protein ligase complex that could interact with HIV-1 virus Vpr protein and HIV-2 virus Vpx protein. Interacts directly with DDB1. Also forms a ternary complex with DDA1 and DDB1. Interacts with NF2 (via FERM domain). Component of EDD/UBR5-DDB1- VprBP/DCAF1 E3 ubiquitin-protein ligase complex. Associates with the E3 ligase complex containing DYRK2, EDD/UBR5, DDB1 and VPRBP proteins (EDVP complex). Interacts directly with DYRK2. INTERACTION: P12520:vpr (xeno); NbExp=5; IntAct=EBI-1996353, EBI-6164519; SUBCELLULAR LOCATION: Cytoplasm. Nucleus. TISSUE SPECIFICITY: Ubiquitously expressed. DOMAIN: The DWD boxes are required for interaction with DDB1. SIMILARITY: Belongs to the VPRBP/DCAF1 family. SIMILARITY: Contains 1 LisH domain. SIMILARITY: Contains 5 WD repeats. SEQUENCE CAUTION: Sequence=BAA34520.2; Type=Erroneous initiation;
The RNAfold program from the Vienna RNA Package is used to perform the secondary structure predictions and folding calculations. The estimated folding energy is in kcal/mol. The more negative the energy, the more secondary structure the RNA is likely to have.
ModBase Predicted Comparative 3D Structure on Q9Y4B6
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Orthologous Genes in Other Species
Orthologies between human, mouse, and rat are computed by taking the best BLASTP hit, and filtering out non-syntenic hits. For more distant species reciprocal-best BLASTP hits are used. Note that the absence of an ortholog in the table below may reflect incomplete annotations in the other species rather than a true absence of the orthologous gene.
AB018343 - Homo sapiens KIAA0800 mRNA for KIAA0800 protein. BC110371 - Homo sapiens Vpr (HIV-1) binding protein, mRNA (cDNA clone MGC:102804 IMAGE:5547856), complete cds. BC022792 - Homo sapiens Vpr (HIV-1) binding protein, mRNA (cDNA clone MGC:23092 IMAGE:4853730), complete cds. AB384527 - Synthetic construct DNA, clone: pF1KA0800, Homo sapiens VPRBP gene for vpr (HIV-1) binding protein, complete cds, without stop codon, in Flexi system. CU692716 - Synthetic construct Homo sapiens gateway clone IMAGE:100021998 5' read VPRBP mRNA. AL080145 - Homo sapiens mRNA; cDNA DKFZp434P113 (from clone DKFZp434P113). JD106595 - Sequence 87619 from Patent EP1572962. JD136655 - Sequence 117679 from Patent EP1572962. JD219649 - Sequence 200673 from Patent EP1572962. JD409156 - Sequence 390180 from Patent EP1572962. JD290349 - Sequence 271373 from Patent EP1572962. JD038815 - Sequence 19839 from Patent EP1572962. JD146352 - Sequence 127376 from Patent EP1572962. JD400001 - Sequence 381025 from Patent EP1572962. JD044979 - Sequence 26003 from Patent EP1572962. JD135338 - Sequence 116362 from Patent EP1572962. JD363874 - Sequence 344898 from Patent EP1572962. JD473426 - Sequence 454450 from Patent EP1572962. JD375904 - Sequence 356928 from Patent EP1572962. JD061713 - Sequence 42737 from Patent EP1572962. JD370859 - Sequence 351883 from Patent EP1572962. JD434136 - Sequence 415160 from Patent EP1572962. JD430709 - Sequence 411733 from Patent EP1572962. JD082532 - Sequence 63556 from Patent EP1572962. JD064035 - Sequence 45059 from Patent EP1572962. JD259758 - Sequence 240782 from Patent EP1572962. JD344486 - Sequence 325510 from Patent EP1572962. JD368717 - Sequence 349741 from Patent EP1572962. JD059141 - Sequence 40165 from Patent EP1572962. JD434246 - Sequence 415270 from Patent EP1572962. AK023239 - Homo sapiens cDNA FLJ13177 fis, clone NT2RP3003870, highly similar to Homo sapiens Vpr-binding protein (VprBP), mRNA. JD455914 - Sequence 436938 from Patent EP1572962. AF061935 - Homo sapiens HIV-1 Vpr-binding protein (VprBP) mRNA, partial cds. DQ573450 - Homo sapiens piRNA piR-41562, complete sequence. JD181087 - Sequence 162111 from Patent EP1572962.
Biochemical and Signaling Pathways
Reactome (by CSHL, EBI, and GO)
Protein Q9Y4B6 (Reactome details) participates in the following event(s):
R-HSA-983157 Interaction of E3 with substrate and E2-Ub complex R-HSA-983147 Release of E3 from polyubiquitinated substrate R-HSA-983140 Transfer of Ub from E2 to substrate and release of E2 R-HSA-983168 Antigen processing: Ubiquitination & Proteasome degradation R-HSA-983169 Class I MHC mediated antigen processing & presentation R-HSA-1280218 Adaptive Immune System R-HSA-168256 Immune System