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ENZYME entry: EC 3.1.1.75

Accepted Name
Poly(3-hydroxybutyrate) depolymerase.
Alternative Name(s)
PHB depolymerase.
Poly((R)-hydroxyalkanoic acid) depolymerase.
Poly(3HB) depolymerase.
Poly(HA(SCL)) depolymerase.
Poly(HA) depolymerase.
Reaction catalysed
((R)-3-hydroxybutanoate)(n) + H(2)O <=> ((R)-3-hydroxybutanoate)(n-1 to 5) + ((R)-3-hydroxybutanoate)(1-5)
Comment(s)
  • Reaction also occurs with esters of other short-chain-length (C(1)- C(5)) hydroxyalkanoic acids (HA).
  • There are two types of polymers: native (intracellular) granules are amorphous and have an intact surface layer; denatured (extracellular) granules either have no surface layer or a damaged surface layer and are partially crystalline.
Cross-references
BRENDA3.1.1.75
EC2PDB3.1.1.75
ExplorEnz3.1.1.75
PRIAM enzyme-specific profiles3.1.1.75
KEGG Ligand Database for Enzyme Nomenclature3.1.1.75
IUBMB Enzyme Nomenclature3.1.1.75
IntEnz3.1.1.75
MEDLINEFind literature relating to 3.1.1.75
MetaCyc3.1.1.75
Rhea expert-curated reactions3.1.1.75
UniProtKB/Swiss-Prot
P12625, PHB_RALPI

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