Crystallization and preliminary X-ray analysis of D-2-hydroxyacid dehydrogenase from Haloferax mediterranei.
Acta Crystallogr Sect F Struct Biol Cryst Commun
; 65(Pt 4): 415-8, 2009 Apr 01.
Article
in En
| MEDLINE
| ID: mdl-19342795
ABSTRACT
D-2-hydroxyacid dehydrogenase (D2-HDH) from Haloferax mediterranei has been overexpressed in Escherichia coli, solubilized in 8 M urea and refolded by rapid dilution. The protein was purified and crystallized by the hanging-drop vapour-diffusion method using ammonium sulfate or PEG 3350 as precipitant. Two crystal forms representing the free enzyme and the nonproductive ternary complex with alpha-ketohexanoic acid and NAD(+) grew under these conditions. Crystals of form I diffracted to beyond 3.0 A resolution and belonged to the monoclinic space group P2(1), with unit-cell parameters a = 66.0, b = 119.6, c = 86.2 A, beta = 96.3 degrees . Crystals of form II diffracted to beyond 2.0 A resolution and belonged to the triclinic space group P1, with unit-cell parameters a = 66.5, b = 75.2, c = 77.6 A, alpha = 109.1, beta = 107.5, gamma = 95.9 degrees. The calculated values for V(M) and analysis of the self-rotation and self-Patterson functions suggest that the asymmetric unit in both crystal forms contains two dimers related by pseudo-translational symmetry.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Haloferax mediterranei
/
Alcohol Oxidoreductases
Language:
En
Journal:
Acta Crystallogr Sect F Struct Biol Cryst Commun
Year:
2009
Document type:
Article
Affiliation country:
Spain