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Recombinant production, crystallization and preliminary X‐ray analysis of PCNA from the psychrophilic archaeon Methanococcoides burtonii DSM 6242

Recombinant production, crystallization and preliminary X‐ray analysis of PCNA from the... Proliferating cell nuclear antigen (PCNA) is a DNA‐clamping protein that is responsible for increasing the processivity of the replicative polymerases during DNA replication and repair. The PCNA from the eurypsychrophilic archaeon Methanococcoides burtonii DSM 6242 (MbPCNA) has been targeted for protein structural studies. A recombinant expression system has been created that overproduces MbPCNA with an N‐terminal hexahistidine affinity tag in Escherichia coli. As a result, recombinant MbPCNA with a molecular mass of 28.3 kDa has been purified to at least 95% homogeneity and crystallized by vapor‐diffusion equilibration. Preliminary X‐ray analysis revealed a trigonal hexagonal R3 space group, with unit‐cell parameters a = b = 102.5, c = 97.5 Å. A single MbPCNA crystal was subjected to complete diffraction data‐set collection using synchrotron radiation and reflections were measured to 2.40 Å resolution. The diffraction data were of suitable quality for indexing and scaling and an unrefined molecular‐replacement solution has been obtained. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Acta Crystallographica Section F Wiley

Recombinant production, crystallization and preliminary X‐ray analysis of PCNA from the psychrophilic archaeon Methanococcoides burtonii DSM 6242

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References (25)

Publisher
Wiley
Copyright
International Union of Crystallography, 2009
ISSN
1744-3091
eISSN
1744-3091
DOI
10.1107/S1744309109037075
pmid
19923734
Publisher site
See Article on Publisher Site

Abstract

Proliferating cell nuclear antigen (PCNA) is a DNA‐clamping protein that is responsible for increasing the processivity of the replicative polymerases during DNA replication and repair. The PCNA from the eurypsychrophilic archaeon Methanococcoides burtonii DSM 6242 (MbPCNA) has been targeted for protein structural studies. A recombinant expression system has been created that overproduces MbPCNA with an N‐terminal hexahistidine affinity tag in Escherichia coli. As a result, recombinant MbPCNA with a molecular mass of 28.3 kDa has been purified to at least 95% homogeneity and crystallized by vapor‐diffusion equilibration. Preliminary X‐ray analysis revealed a trigonal hexagonal R3 space group, with unit‐cell parameters a = b = 102.5, c = 97.5 Å. A single MbPCNA crystal was subjected to complete diffraction data‐set collection using synchrotron radiation and reflections were measured to 2.40 Å resolution. The diffraction data were of suitable quality for indexing and scaling and an unrefined molecular‐replacement solution has been obtained.

Journal

Acta Crystallographica Section FWiley

Published: Nov 1, 2009

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