Article

Crystallization and preliminary X-ray diffraction analyses of the homodimeric glycine decarboxylase (P-protein) from the cyanobacterium Synechocystis sp. PCC 6803.

Department of Plant Physiology, University of Rostock, Germany.
Acta Crystallographica Section F Structural Biology and Crystallization Communications (impact factor: 0.51). 02/2010; 66(Pt 2):187-91. DOI:10.1107/S1744309109052828 pp.187-91
Source: PubMed

ABSTRACT Glycine decarboxylase, or P-protein, is a major enzyme that is involved in the C(1) metabolism of all organisms and in the photorespiratory pathway of plants and cyanobacteria. The protein from Synechocystis sp. PCC 6803 is a homodimer with a mass of 215 kDa. Recombinant glycine decarboxylase was expressed in Escherichia coli and purified by metal-affinity, ion-exchange and gel-filtration chromatography. Crystals of P-protein that diffracted to a resolution of 2.1 A were obtained using the hanging-drop vapour-diffusion method at 291 K. X-ray diffraction data were collected from cryocooled crystals using synchrotron radiation. The crystals belonged to space group P2(1)2(1)2(1), with unit-cell parameters a = 96.30, b = 135.81, c = 179.08 A.

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Keywords

291 K. X-ray diffraction data
 
Escherichia coli
 
gel-filtration chromatography
 
Glycine decarboxylase
 
hanging-drop vapour-diffusion method
 
metal-affinity
 
P-protein
 
photorespiratory pathway
 
Recombinant glycine decarboxylase
 
Synechocystis sp
 
unit-cell parameters
 

Dirk Hasse