Expression, purification, crystallization and preliminary crystallographic analysis of phosphoserine aminotransferase from Bacillus alcalophilus.
Acta Crystallogr D Biol Crystallogr
; 59(Pt 12): 2319-21, 2003 Dec.
Article
em En
| MEDLINE
| ID: mdl-14646107
ABSTRACT
Phosphoserine aminotransferase (PSAT; EC 2.6.1.52) from Bacillus alcalophilus, an obligatory alkalophile with optimum growth at pH 10.6, was overexpressed in Escherichia coli, purified and crystallized under two different conditions using the hanging-drop vapour-diffusion method. Crystals were obtained using trisodium citrate dihydrate or PEG 400 as a precipitating agent. Crystals grown in the presence of trisodium citrate belong to the orthorhombic space group C222(1), with unit-cell parameters a = 105.6, b = 136.6, c = 152.0 A, and those grown in the presence of PEG 400 belong to the orthorhombic space group P2(1)2(1)2, with unit-cell parameters a = 143.7, b = 84.3, c = 67.4 A. Complete data sets were collected to 1.7 and 1.6 A resolution, respectively, at 100 K using synchrotron radiation. Analysis of the structure of B. alcalophilus PSAT may reveal structural features that contribute to enzyme adaptability at high pH values.
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Base de dados:
MEDLINE
Assunto principal:
Bacillus
/
Transaminases
Idioma:
En
Revista:
Acta Crystallogr D Biol Crystallogr
Ano de publicação:
2003
Tipo de documento:
Article
País de afiliação:
Finlândia