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C1 domain
C1 domain (also known as phorbol esters/diacylglycerol binding domain) binds an important secondary messenger diacylglycerol (DAG), as well as the analogous phorbol esters[1]. Phorbol esters can directly stimulate protein kinase C, PKC. The N-terminal region of PKC, known as C1, has been shown[2] Additional recommended knowledgePhorbol esters (such as PMA) are analogues of DAG and potent tumor promoters that cause a variety of physiological changes when administered to both cells and tissues. DAG activates a family of serine/threonine protein kinases, collectively known as protein kinase C (PKC). Phorbol esters can directly stimulate PKC. The N-terminal region of PKC, known as C1, binds PMA and DAG in a phospholipid and zinc-dependent fashion. The C1 region contains one or two copies of a cysteine-rich domain, which is about 50 amino-acid residues long, and which is essential for DAG/PMA-binding. The DAG/PMA-binding domain binds two zinc ions; the ligands of these metal ions are probably the six cysteines and two histidines that are conserved in this domain. Human proteins containing this domainAKAP13; ARAF; ARHGAP29; ARHGEF2; BRAF; CDC42BPA; CDC42BPB; CDC42BPG; CHN1; CHN2; CIT; DGKA; DGKB; DGKD; DGKE; DGKG; DGKH; DGKI; DGKK; DGKQ; DGKZ; GMIP; HMHA1; KSR1; KSR2; MYO9A; MYO9B; PDZD8; PRKCA; PRKCB1; PRKCD; PRKCE; PRKCG; PRKCH; PRKCI; PRKCN; PRKCQ; PRKCZ; PRKD1; PRKD2; PRKD3; RACGAP1; RAF1; RASGRP; RASGRP1; RASGRP2; RASGRP3; RASGRP4; RASSF1; RASSF5; ROCK1; ROCK2; STAC; STAC2; STAC3; TENC1; UNC13A; UNC13B; UNC13C; VAV1; VAV2; VAV3; References
Categories: Peripheral membrane proteins | Protein domains |
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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "C1_domain". A list of authors is available in Wikipedia. |