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Expression, purification and crystallization of Aspergillus nidulans NmrA, a negative regulatory protein involved in nitrogen-metabolite repression
Journal article

Expression, purification and crystallization of Aspergillus nidulans NmrA, a negative regulatory protein involved in nitrogen-metabolite repression

C E Nichols, S Cocklin, A Dodds, J Ren, H Lamb, A R Hawkins and D K Stammers
Acta crystallographica. Section D, Biological crystallography., v 57(Pt 11), pp 1722-1725
Nov 2001
PMID: 11679757

Abstract

Fungal Proteins - chemistry Repressor Proteins - chemistry Aspergillus nidulans - chemistry Escherichia coli Crystallization Recombinant Proteins - chemistry Crystallography, X-Ray Protein Conformation Nitrogen Compounds
The NmrA repressor protein of Aspergillus nidulans was overproduced in Escherichia coli and purified to homogeneity. Gel-exclusion chromatography showed that NmrA was monomeric in solution under the buffer conditions used. The protein was crystallized in three forms, belonging to trigonal, monoclinic and hexagonal space groups. Two of these crystal forms (A and B) diffract to high resolution and thus appear suitable for structure determination. Crystal form A belongs to space group P3((1))21, with unit-cell parameters a = b = 76.8, c = 104.9 A. Crystal form B belongs to space group C2, with unit-cell parameters a = 148.8, b = 64.3, c = 110.2 A, beta = 121.8 degrees.

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Collaboration types
Domestic collaboration
Web of Science research areas
Biochemical Research Methods
Biochemistry & Molecular Biology
Biophysics
Crystallography
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