Extending the C2 domain family: C2s in PKCs delta, epsilon, eta, theta, phospholipases, GAPs, and perforin

Protein Sci. 1996 Jan;5(1):162-6. doi: 10.1002/pro.5560050120.


Various membrane lipid metabolites, generated by phospholipases C and D (PLCs, PLDs), are known to regulate the activities of protein kinases C (PKCs) and GTP-ase activating proteins (GAPs) in a range of cellular processes. Conventional Ca(2+)-dependent PKCs (alpha, beta I, beta II, and gamma), PLCs and various GAPs are all known to contain copies of a phospholipid-binding domain, termed C2 or CalB. Here we recognize that C2 domains are also present in "new" Ca(2+)-independent PKCs (delta, epsilon, eta, and theta), other kinases, a eukaryotic PLD, the breakpoint cluster region (BCR) gene product, and two further GAPS. Twenty-two previously unrecognized C2 domain sequences are presented, which include a single copy in the mammalian poreforming proteins, perforin.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amino Acid Sequence
  • GTPase-Activating Proteins
  • Isoenzymes / chemistry*
  • Membrane Glycoproteins / chemistry*
  • Molecular Sequence Data
  • Perforin
  • Phospholipases / chemistry*
  • Pore Forming Cytotoxic Proteins
  • Protein Kinase C / chemistry*
  • Proteins / chemistry*
  • Sequence Alignment


  • GTPase-Activating Proteins
  • Isoenzymes
  • Membrane Glycoproteins
  • Pore Forming Cytotoxic Proteins
  • Proteins
  • Perforin
  • Protein Kinase C
  • Phospholipases