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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
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== References == | == References == | ||
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Revision as of 10:32, 11 September 2015
ALIPHATIC AMIDASE (EC 3.5.1.4)ALIPHATIC AMIDASE (EC 3.5.1.4)
Structural highlights
Publication Abstract from PubMedThe aliphatic amidase from Pseudomonas aeruginosa belongs to the nitrilase superfamily, and Cys(166) is the nucleophile of the catalytic mechanism. A model of amidase was built by comparative modelling using the crystal structure of the worm nitrilase-fragile histidine triad fusion protein (NitFhit; Protein Data Bank accession number 1EMS) as a template. The amidase model predicted a catalytic triad (Cys-Glu-Lys) situated at the bottom of a pocket and identical with the presumptive catalytic triad of NitFhit. Three-dimensional models for other amidases belonging to the nitrilase superfamily also predicted Cys-Glu-Lys catalytic triads. Support for the structure for the P. aeruginosa amidase came from site-direct mutagenesis and from the locations of amino acid residues that altered substrate specificity or binding when mutated. Support for a three-dimensional structure predicting a Cys-Glu-Lys catalytic triad for Pseudomonas aeruginosa amidase comes from site-directed mutagenesis and mutations altering substrate specificity.,Novo C, Farnaud S, Tata R, Clemente A, Brown PR Biochem J. 2002 Aug 1;365(Pt 3):731-8. PMID:11955282[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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