Purification, crystallization and preliminary crystallographic analysis of a thermostable endonuclease IV from Thermotoga maritima.
Acta Crystallogr Sect F Struct Biol Cryst Commun
; 65(Pt 12): 1317-9, 2009 Dec 01.
Article
em En
| MEDLINE
| ID: mdl-20054139
ABSTRACT
The DNA-repair enzyme endonuclease IV from the thermophilic bacterium Thermotoga maritima MSB8 (reference sequence NC_000853) has been expressed in Escherichia coli and crystallized for X-ray analysis. T. maritima endonuclease IV is a 287-amino-acid protein with 32% sequence identity to E. coli endonuclease IV. The protein was purified to homogeneity and was crystallized using the sitting-drop vapor-diffusion method. The protein crystallized in space group P6(1), with one biological molecule in the asymmetric unit, corresponding to a Matthews coefficient of 2.39 A(3) Da(-1) and 47% solvent content. The unit-cell parameters of the crystals were a = b = 123.2, c = 35.6 A. Microseeding and further optimization yielded crystals with an X-ray diffraction limit of 2.36 A. A single 70 degrees data set was collected and processed, resulting in an overall R(merge) and a completeness of 9.5% and 99.3%, respectively.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Thermotoga maritima
/
Desoxirribonuclease IV (Fago T4-Induzido)
Idioma:
En
Ano de publicação:
2009
Tipo de documento:
Article