IUBMB Enzyme Nomenclature


Accepted name: proclavaminate amidinohydrolase

Reaction: amidinoproclavaminate + H2O = proclavaminate + urea

For diagram click here.

Other name(s): PAH; proclavaminate amidino hydrolase

Systematic name: amidinoproclavaminate amidinohydrolase

Comments: Forms part of the pathway for the biosythesis of the β-lactamase inhibitor clavulanate in Streptomyces clavuligerus. It carries out an intermediary reaction between the first reaction of EC, clavaminate synthase, and the second and third reactions of that enzyme. Requires Mn2+.

Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, PDB, CAS registry number:


1. Salowe, S.P., Krol, W.J., Iwatareuyl, D. and Townsend, C.A. Elucidation of the order of oxidations and identification of an intermediate in the multistep clavaminate synthase reaction. Biochemistry 30 (1991) 2281-2292. [PMID: 1998687]

2. Zhou, J., Kelly, W.L., Bachmann, B.O., Gunsior, M., Townsend, C.A. and Solomon, E.I. Spectroscopic studies of substrate interactions with clavaminate synthase 2, a multifunctional α-KG-dependent non-heme iron enzyme: Correlation with mechanisms and reactivities. J. Am. Chem. Soc. 123 (2001) 7388-7389.

3. Townsend, C.A. New reactions in clavulanic acid biosynthesis. Curr. Opin. Chem. Biol. 6 (2002) 583-589. [PMID: 12413541]

4. Wu, T.K., Busby, R.W., Houston, T.A., McIlwaine, D.B., Egan, L.A. and Townsend, C.A. Identification, cloning, sequencing, and overexpression of the gene encoding proclavaminate amidino hydrolase and characterization of protein function in clavulanic acid biosynthesis. J. Bacteriol. 177 (1995) 3714-3720. [PMID: 7601835]

[EC created 2003]

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