Insights into the fatty acid chain length specificity of the carboxylesterase PA3859 from Pseudomonas aeruginosa: A combined structural, biochemical and computational study.
Primary Citation of Related Structures: 3CN7, 3CN9
PubMed Abstract:
The open reading frame PA3859 of Pseudomonas aeruginosa encodes an intracellular carboxylesterase belonging to a group of microbial enzymes (EC 3.1.1.1) that catalyze the hydrolysis of aliphatic and aromatic esters with a broad substrate specificity. With few exceptions, for this class of enzymes, belonging to the α/β-hydrolase fold superfamily, very little information is available regarding their biochemical activity and in vivo function ...
The open reading frame PA3859 of Pseudomonas aeruginosa encodes an intracellular carboxylesterase belonging to a group of microbial enzymes (EC 3.1.1.1) that catalyze the hydrolysis of aliphatic and aromatic esters with a broad substrate specificity. With few exceptions, for this class of enzymes, belonging to the α/β-hydrolase fold superfamily, very little information is available regarding their biochemical activity and in vivo function. The X-ray crystal structure of recombinant PA3859 has been determined for two crystal forms (space groups P2(1) and P2(1)2(1)2). The kinetic properties of the enzyme were studied using p-nitrophenyl esters as substrates and data fitted to a surface dilution mixed micelle kinetic model. Enzymatic assays and computational docking simulations, pinpointed the enzyme's preference for esters of palmitic and/or stearic acids and provided insights into the enzyme-substrate favorable binding modes.
Related Citations:
Isolation, Characterization, and Heterologous Expression of a Carboxylesterase of Pseudomonas aeruginosa PAO1 Pesaresi, A., Devescovi, G., Lamba, D., Venturi, V., Degrassi, G. (2005) Curr Microbiol 50: 102
Crystallization, X-ray Diffraction Analysis and Phasing of Carboxylesterase PA3859 from Pseudomonas aeruginosa Pesaresi, A., Lamba, D. (2005) Biochim Biophys Acta Proteins Proteom 1752: 197
Organizational Affiliation:
Istituto di Cristallografia, Consiglio Nazionale delle Ricerche, Area Science Park - Basovizza, S.S. 14, Km 163.5, I-34149 Trieste, Italy. alessandro.pesaresi@ts.ic.cnr.it
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