2W8S

CRYSTAL STRUCTURE OF A catalytically promiscuous PHOSPHONATE MONOESTER HYDROLASE FROM Burkholderia caryophylli

Summary for 2W8S

• Entry DOI: 10.2210/pdb2w8s/pdb
• Descriptor: PHOSPHONATE MONOESTER HYDROLASE, ZINC ION, FE (III) ION, ... (6 entities in total)
• Functional Keywords: hydrolase, formylglycine, phosphodiesterase, alkaline phosphatase superfamily, catalytic promiscuity, phosphonate monoester hydrolase
• Biological source: BURKHOLDERIA CARYOPHYLLI
• Total number of polymer chains: 4
• Total formula weight: 246407.00

Authors

Jonas, S.,van Loo, B.,Hyvonen, M.,Hollfelder, F. (deposition date: 2009-01-19, release date: 2010-02-23, Last modification date: 2023-12-13)

Primary citation

Van Loo, B.,Jonas, S.,Babtie, A.C.,Benjdia, A.,Berteau, O.,Hyvonen, M.,Hollfelder, F.
An Efficient, Multiply Promiscuous Hydrolase in the Alkaline Phosphatase Superfamily.
Proc.Natl.Acad.Sci.USA, 107:2740-, 2010

PubMed Abstract: We report a catalytically promiscuous enzyme able to efficiently promote the hydrolysis of six different substrate classes. Originally assigned as a phosphonate monoester hydrolase (PMH) this enzyme exhibits substantial second-order rate accelerations ((k(cat)/K(M))/k(w)), ranging from 10(7) to as high as 10(19), for the hydrolyses of phosphate mono-, di-, and triesters, phosphonate monoesters, sulfate monoesters, and sulfonate monoesters. This substrate collection encompasses a range of substrate charges between 0 and -2, transition states of a different nature, and involves attack at two different reaction centers (P and S). Intrinsic reactivities (half-lives) range from 200 days to 10(5) years under near neutrality. The substantial rate accelerations for a set of relatively difficult reactions suggest that efficient catalysis is not necessarily limited to efficient stabilization of just one transition state. The crystal structure of PMH identifies it as a member of the alkaline phosphatase superfamily. PMH encompasses four of the native activities previously observed in this superfamily and extends its repertoire by two further activities, one of which, sulfonate monoesterase, has not been observed previously for a natural enzyme. PMH is thus one of the most promiscuous hydrolases described to date. The functional links between superfamily activities can be presumed to have played a role in functional evolution by gene duplication.

PubMed: 20133613
DOI: 10.1073/PNAS.0903951107

Experimental method

X-RAY DIFFRACTION (2.4 Å)