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Cloning, purification, crystallization and preliminary crystallographic study of calcium‐binding protein 5 from Entamoeba histolytica

Cloning, purification, crystallization and preliminary crystallographic study of calcium‐binding... Entamoeba histolytica is the causative agent of human amoebiasis. Phagocytosis is the major route of food intake by this parasite and is responsible for its virulence. Calcium and calcium‐binding proteins play major roles in its phagocytosis. Calcium‐binding protein 5 from E. histolytica (EhCaBP5) is a cytoplasmic protein; its expression is very sensitive to serum starvation and it seems to be involved in binding to myosin I. In this study, EhCaBP5 was cloned, expressed in Escherichia coli and purified using affinity and size‐exclusion chromatography. The purified protein crystallized in space group C222 and the crystals diffracted to 2 Å resolution. The Matthews coefficient indicated the presence of one molecule in the asymmetric unit, with a VM of 2.35 Å3 Da−1 and a solvent content of 47.7%. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Acta Crystallographica Section F Wiley

Cloning, purification, crystallization and preliminary crystallographic study of calcium‐binding protein 5 from Entamoeba histolytica

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References (13)

Publisher
Wiley
Copyright
International Union of Crystallography, 2012
ISSN
1744-3091
eISSN
1744-3091
DOI
10.1107/S1744309112044612
pmid
23192043
Publisher site
See Article on Publisher Site

Abstract

Entamoeba histolytica is the causative agent of human amoebiasis. Phagocytosis is the major route of food intake by this parasite and is responsible for its virulence. Calcium and calcium‐binding proteins play major roles in its phagocytosis. Calcium‐binding protein 5 from E. histolytica (EhCaBP5) is a cytoplasmic protein; its expression is very sensitive to serum starvation and it seems to be involved in binding to myosin I. In this study, EhCaBP5 was cloned, expressed in Escherichia coli and purified using affinity and size‐exclusion chromatography. The purified protein crystallized in space group C222 and the crystals diffracted to 2 Å resolution. The Matthews coefficient indicated the presence of one molecule in the asymmetric unit, with a VM of 2.35 Å3 Da−1 and a solvent content of 47.7%.

Journal

Acta Crystallographica Section FWiley

Published: Dec 1, 2012

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