1bvq
From Proteopedia
THREE-DIMENSIONAL STRUCTURE OF 4-HYDROXYBENZOYL COA THIOESTERASE FROM PSEUDOMONAS SP. STRAIN CBS-3.
Structural highlights
Function[4HBT_PSEUC] Hydrolyzes 4-hydroxybenzoate-CoA, and to a lesser extent benzoyl-CoA and 4-chlorobenzoate-CoA. Not active against aliphatic acyl-CoA thioesters, including palmitoyl-CoA, hexanoyl-CoA and acetyl-CoA.[1] Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedThe soil-dwelling microbe, Pseudomonas sp. strain CBS-3, has attracted recent attention due to its ability to survive on 4-chlorobenzoate as its sole carbon source. The biochemical pathway by which this organism converts 4-chlorobenzoate to 4-hydroxybenzoate consists of three enzymes: 4-chlorobenzoyl-CoA ligase, 4-chlorobenzoyl-CoA dehalogenase, and 4-hydroxybenzoyl-CoA thioesterase. Here we describe the three-dimensional structure of the thioesterase determined to 2.0-A resolution. Each subunit of the homotetramer is characterized by a five-stranded anti-parallel beta-sheet and three major alpha-helices. While previous amino acid sequence analyses failed to reveal any similarity between this thioesterase and other known proteins, the results from this study clearly demonstrate that the molecular architecture of 4-hydroxybenzoyl-CoA thioesterase is topologically equivalent to that observed for beta-hydroxydecanoyl thiol ester dehydrase from Escherichia coli. On the basis of the structural similarity between these two enzymes, the active site of the thioesterase has been identified and a catalytic mechanism proposed. The three-dimensional structure of 4-hydroxybenzoyl-CoA thioesterase from Pseudomonas sp. Strain CBS-3.,Benning MM, Wesenberg G, Liu R, Taylor KL, Dunaway-Mariano D, Holden HM J Biol Chem. 1998 Dec 11;273(50):33572-9. PMID:9837940[2] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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