======= 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 |}}