1PTD

PHOSPHATIDYLINOSITOL-SPECIFIC PHOSPHOLIPASE C

External Resource: Annotation


Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

ChainsDomain InfoClassFoldSuperfamilyFamilyDomainSpeciesProvenance Source (Version)
Ad1ptda_ Alpha and beta proteins (a/b) TIM beta/alpha-barrel PLC-like phosphodiesterases Bacterial PLC Phosphatidylinositol-specific phospholipase C (Bacillus cereus ) [TaxId: 1396 ], SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
ASCOP2B SuperfamilyPLC-like phosphodiesterases 8043840 3000615 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
API-PLC-X_1e1ptdA1 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: PI-PLC-X_1ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
A3.20.20.190 Alpha Beta Alpha-Beta Barrel TIM Barrel Phosphatidylinositol (PI) phosphodiesteraseCATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
PF00388Phosphatidylinositol-specific phospholipase C, X domain (PI-PLC-X)Phosphatidylinositol-specific phospholipase C, X domain- Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
PHOSPHATIDYLINOSITOL-SPECIFIC PHOSPHOLIPASE C

InterPro: Protein Family Classification InterPro Database Homepage

ChainsAccessionNameType
IPR000909Phosphatidylinositol-specific phospholipase C, X domainDomain
IPR051057Phosphoinositide phospholipase C domain-containing proteinFamily
IPR017946PLC-like phosphodiesterase, TIM beta/alpha-barrel domain superfamilyHomologous Superfamily

Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage

ChainsEnzyme NameDescriptionCatalytic Residues
phosphatidylinositol diacylglycerol-lyase  M-CSA #26

Phosphatidylinositol-specific phospholipase C (PI-PLC) is a ubiquitous enzyme involved in a vast range of cellular signalling cascades. Prokaryotic PLCs act as virulence factors in some bacteria, catalysing the hydrolysis of the sn-3 phosphodiester bond of phosphatidylinositol (PI) producing diacylglycerol (DAG) and inositol 1-phosphate (I(1)P).

For the bacterial enzyme, the main product is the cyclic intermediate, myo-inositol 1,2-cyclic phosphate, which is rapidly hydrolysed to I(1)P by the eukaryotic PI-PLCs whereas the mammalian enzyme undergoes complete catalysis.

PI-PLC from Bacillus cereus, and the nearly identical enzyme from B. thuringiensis have been used as model systems for the study of IP-PLCs as a whole. Bacterial PI-PLCs are metal-ion-independent. This is in contrast to mammalian PI-PLCs which are Ca(II) dependent. The R69D mutant of B. thuringiensis PI-PLC is calcium dependent and has been used to investigate the role of calcium in catalysis by PI-PLCs [PMID:16042375].

Defined by 5 residues: HIS:A-32ASP:A-33ARG:A-69HIS:A-82ASP:A-274
 | 
 
Explore in 3D: M-CSA Motif Definition
Search M-CSA Motif
EC: 3.1.4.10 (PDB Primary Data)
EC: 4.6.1.13 (UniProt)