C2 domain

C2 domain
The C2-domain of C.absonum α-toxin (PDB 1OLP). β-strands are shown in yellow, α-helices in red, loops in green. Co-ordinated calcium ions are in cyan.
Identifiers
SymbolC2
PfamPF00168
Pfam clanCL0154
ECOD11.2.1
InterProIPR000008
SMARTC2
PROSITEPDOC00380
SCOP21qas / SCOPe / SUPFAM
OPM superfamily45
OPM protein1ugk
CDDcd00030
Available protein structures:
Pfam  structures / ECOD  
PDBRCSB PDB; PDBe; PDBj
PDBsumstructure summary
Phosphoinositide 3-kinase C2
Structure of phosphoinositide 3-kinase.[1]
Identifiers
SymbolPI3K_C2
PfamPF00792
Pfam clanCL0154
ECOD11.2.1
InterProIPR002420
SMARTPI3K_C2
PROSITEPDOC50004
SCOP21e8x / SCOPe / SUPFAM
CDDcd08380
Available protein structures:
Pfam  structures / ECOD  
PDBRCSB PDB; PDBe; PDBj
PDBsumstructure summary
PDB1e7u​, 1e7v​, 1e8w​, 1e8x​, 1e8y​, 1e8z​, 1e90​, 1he8​, 2a4z​, 2a5u​, 2chw​, 2chx​, 2chz​, 2rd0​, 2v4l​, 3csf​, 3cst​, 3dbs​, 3dpd​, 3ene

A C2 domain is a protein structural domain involved in targeting proteins to cell membranes. The typical version (PKC-C2) has a beta-sandwich composed of 8 β-strands that co-ordinates two or three calcium ions, which bind in a cavity formed by the first and final loops of the domain, on the membrane binding face. Many other C2 domain families don't have calcium binding activity.[2][3]

  1. ^ Walker EH, Pacold ME, Perisic O, Stephens L, Hawkins PT, Wymann MP, Williams RL (October 2000). "Structural determinants of phosphoinositide 3-kinase inhibition by wortmannin, LY294002, quercetin, myricetin, and staurosporine". Molecular Cell. 6 (4): 909–19. doi:10.1016/S1097-2765(05)00089-4. PMID 11090628.
  2. ^ Zhang D, Aravind L (December 2010). "Identification of novel families and classification of the C2 domain superfamily elucidate the origin and evolution of membrane targeting activities in eukaryotes". Gene. 469 (1–2): 18–30. doi:10.1016/j.gene.2010.08.006. PMC 2965036. PMID 20713135.
  3. ^ Zhang D, Aravind L (October 2012). "Novel transglutaminase-like peptidase and C2 domains elucidate the structure, biogenesis and evolution of the ciliary compartment". Cell Cycle. 11 (20): 3861–75. doi:10.4161/cc.22068. PMC 3495828. PMID 22983010.