Purification, crystallization and preliminary X-ray crystallographic studies of the Mycobacterium tuberculosis DNA gyrase CTD.
Acta Crystallogr Sect F Struct Biol Cryst Commun
; 68(Pt 2): 178-80, 2012 Feb 01.
Article
em En
| MEDLINE
| ID: mdl-22297993
ABSTRACT
Mycobacterium tuberculosis DNA gyrase, a nanomachine involved in regulation of DNA topology, is the only type II topoisomerase present in this organism and hence is the sole target of fluoroquinolone in the treatment of tuberculosis. The C-terminal domain (CTD) of the DNA gyrase A subunit possesses a unique feature, the ability to wrap DNA in a chiral manner, that plays an essential role during the catalytic cycle. A construct of 36 kDa corresponding to this domain has been overproduced, purified and crystallized. Diffraction data were collected to 1.55 Å resolution. Cleavage of the N-terminal His tag was crucial for obtaining crystals. The crystals belonged to space group P2(1)2(1)2(1), with one molecule in the asymmetric unit and a low solvent content (33%). This is the first report of the crystallization and preliminary X-ray diffraction studies of a DNA gyrase CTD from a species that contains one unique type II topoisomerase.
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1
Base de dados:
MEDLINE
Assunto principal:
DNA Girase
/
Mycobacterium tuberculosis
Idioma:
En
Ano de publicação:
2012
Tipo de documento:
Article