======= TAP2 ======= == Gene Information == * **Official Symbol**: TAP2 * **Official Name**: transporter 2, ATP binding cassette subfamily B member * **Aliases and Previous Symbols**: N/A * **Entrez ID**: [[https://www.ncbi.nlm.nih.gov/gene/?term=6891|6891]] * **UniProt**: [[https://www.uniprot.org/uniprot/Q03519|Q03519]] * **Interactions**: [[https://thebiogrid.org/search.php?search=TAP2&organism=9606|BioGRID]] * **PubMed articles**: [[https://www.ncbi.nlm.nih.gov/pubmed/?term=gene%20TAP2|Open PubMed]] * **OMIM**: [[https://omim.org/entry/170261|Open OMIM]] == Function Summary == * **Entrez Summary**: The membrane-associated protein encoded by this gene is a member of the superfamily of ATP-binding cassette (ABC) transporters. ABC proteins transport various molecules across extra- and intra-cellular membranes. ABC genes are divided into seven distinct subfamilies (ABC1, MDR/TAP, MRP, ALD, OABP, GCN20, White). This protein is a member of the MDR/TAP subfamily. Members of the MDR/TAP subfamily are involved in multidrug resistance. This gene is located 7 kb telomeric to gene family member ABCB2. The protein encoded by this gene is involved in antigen presentation. This protein forms a heterodimer with ABCB2 in order to transport peptides from the cytoplasm to the endoplasmic reticulum. Mutations in this gene may be associated with ankylosing spondylitis, insulin-dependent diabetes mellitus, and celiac disease. Alternative splicing of this gene produces products which differ in peptide selectivity and level of restoration of surface expression of MHC class I molecules. [provided by RefSeq, Feb 2014]. * **UniProt Summary**: Involved in the transport of antigens from the cytoplasm to the endoplasmic reticulum for association with MHC class I molecules. Also acts as a molecular scaffold for the final stage of MHC class I folding, namely the binding of peptide. Nascent MHC class I molecules associate with TAP via tapasin. Inhibited by the covalent attachment of herpes simplex virus ICP47 protein, which blocks the peptide-binding site of TAP. Inhibited by human cytomegalovirus US6 glycoprotein, which binds to the lumenal side of the TAP complex and inhibits peptide translocation by specifically blocking ATP-binding to TAP1 and prevents the conformational rearrangement of TAP induced by peptide binding. Inhibited by human adenovirus E3-19K glycoprotein, which binds the TAP complex and acts as a tapasin inhibitor, preventing MHC class I/TAP association. |ABC membrane| |ABC tran| |antigen processing and presentation of endogenous peptide antigen via MHC class Ib via ER pathway| |tapasin binding| |antigen processing and presentation of endogenous peptide antigen via MHC class Ib via ER pathway, TAP-dependent| |TAP complex| |peptide antigen transport| |ATPase-coupled peptide antigen transmembrane transporter activity| |cytosol to endoplasmic reticulum transport| |ATPase-coupled peptide transmembrane transporter activity| |TAP1 binding| |TAP2 binding| |MHC class I peptide loading complex| |vesicle fusion with endoplasmic reticulum-Golgi intermediate compartment (ERGIC) membrane| |MHC class Ib protein binding| |antigen processing and presentation of endogenous peptide antigen via MHC class Ib| |antigen processing and presentation of peptide antigen via MHC class Ib| |peptide transmembrane transporter activity| |antigen processing and presentation of endogenous peptide antigen| |antigen processing and presentation of endogenous peptide antigen via MHC class I| |antigen processing and presentation via MHC class Ib| |MHC class I protein binding| |antigen processing and presentation of endogenous antigen| |ATPase-coupled transmembrane transporter activity| |endoplasmic reticulum-Golgi intermediate compartment membrane| |vesicle fusion| |phagocytic vesicle membrane| |antigen processing and presentation of exogenous peptide antigen via MHC class I, TAP-dependent| |organelle membrane fusion| |antigen processing and presentation of exogenous peptide antigen via MHC class I| |organelle fusion| |antigen processing and presentation of peptide antigen via MHC class I| |integral component of endoplasmic reticulum membrane| |membrane fusion| |antigen processing and presentation of exogenous peptide antigen| |antigen processing and presentation of exogenous antigen| |antigen processing and presentation of peptide antigen| |antigen processing and presentation| |ATPase activity| |vesicle organization| |nuclear speck| |adaptive immune response| |viral process| |symbiotic process| |interspecies interaction between organisms| |membrane organization| |endoplasmic reticulum membrane| |ion transmembrane transport| |endoplasmic reticulum| |transmembrane transport| |ion transport| |ATP binding| |protein transport| |intracellular transport| |peptide transport| |amide transport| |establishment of protein localization| |establishment of localization in cell| |nitrogen compound transport| |immune response| |vesicle-mediated transport| |membrane| \\ === CRISPR Data === ^Screen^Score^ |[[:results:exp6|Bortezomib 0.005μM R00 exp6]]|-2.21| |[[:results:exp485|GSK626616 14μM R08 exp485]]|-1.71| |[[:results:exp415|Trichostatin-A 0.06μM R07 exp415]]|1.7| |[[:results:exp466|Cannabidiol 20μM R08 exp466]]|2.2| No correlation found to any other genes in chemogenomics. Global Fraction of Cell Lines Where Essential: 0/739 ^Tissue^Fraction Of Cell Lines Where Essential^ |1290807.0|0/1| |909776.0|0/1| |bile duct|0/28| |blood|0/28| |bone|0/26| |breast|0/33| |central nervous system|0/56| |cervix|0/4| |colorectal|0/17| |esophagus|0/13| |fibroblast|0/1| |gastric|0/16| |kidney|0/21| |liver|0/20| |lung|0/75| |lymphocyte|0/16| |ovary|0/26| |pancreas|0/24| |peripheral nervous system|0/16| |plasma cell|0/15| |prostate|0/1| |skin|0/24| |soft tissue|0/9| |thyroid|0/2| |upper aerodigestive|0/22| |urinary tract|0/29| |uterus|0/5| == Essentiality in NALM6 == * **Essentiality Rank**: 9572 * **Expression level (log2 read counts)**: 8.1 {{:chemogenomics:nalm6 dist.png?nolink |}}