Mountassif D, Andreoletti P, Cherkaoui-Malki M, Latruffe N, El Kebbaj MS. Structural and catalytic properties of the D-3-hydroxybutyrate dehydrogenase from Pseudomonas aeruginosa.
Curr Microbiol 2010;
61:7-12. [PMID:
20052585 DOI:
10.1007/s00284-009-9568-7]
[Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2009] [Accepted: 12/04/2009] [Indexed: 10/20/2022]
Abstract
To put forward BDH from Pseudomonas aeruginosa's enzymatic properties, we report a two-step purification of BDH and its gene sequencing allowing the investigation of its structural properties. Purification of BDH was achieved, using ammonium sulfate fractionation and Blue Sepharose CL-6B affinity chromatography. SDS-PAGE analysis reveals a MM of 29 kDa, whereas the native enzyme showed a MM of 120 kDa suggesting a homotetrameric structure. BDH encoding gene sequence shows a nucleotide open reading frame sequence of 771 bp encoding a 265 amino acid residues polypeptide chain. The modeling analysis of the three dimensional structure fits with the importance of amino acids in the catalysis reaction especially a strictly conserved tetrad. Amino-acid residues in interaction with the coenzyme NAD(+) were also identified.
Collapse