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- ***********************
- * C2 domain signature *
- ***********************
-
- Some isozymes of protein kinase C (PKC) [1] contain a domain, known as C2, of
- about 116 amino acid residues which is located between the two copies of the
- C1 domain (that bind phorbol esters and diacylglycerol) and the protein kinase
- catalytic domain. The function of the C2 domain is not yet clear, but it could
- be involved in calcium-dependent phospholipid binding. The isozymes of PKC
- that contain a C2 domain are: alpha, beta-I, beta-II, gamma, and Drosophila
- PKC1 and PKC2.
-
- The C2 domain is also found in synaptotagmin (p65) [2,3], a synaptic vesicle
- protein that binds acidic phospholipids and that may have a regulatory role in
- the membrane interactions during trafficking of synaptic vesicles at the
- active zone of the synapse. There are two copies of the C2 domain in p65 and
- they are located in the cytoplasmic C-terminal part of the protein.
-
- The signature pattern we developed for the C2 domain is located in the most
- conserved part of that domain (positions 34 to 49).
-
- -Consensus pattern: [AG]-x(2)-L-x(3)-D-x(2)-G-x-S-D-P-Y
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
- -Last update: December 1992 / Text revised.
-
- [ 1] Azzi A., Boscoboinik D., Hensey C.
- Eur. J. Biochem. 208:547-557(1992).
- [ 2] Perin M.S., Fried V.A., Mignery G.A., Jahn R., Suedhof T.C.
- Nature 345:260-263(1990).
- [ 3] Perin M.S., Johnston P.A., Oezcelik T., Jahn R., Francke U., Suedhof T.C.
- J. Biol. Chem. 266:615-622(1991).
-