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PRELIMINARY CRYSTALLOGRAPHIC DATA FOR PNEUMOCYSTIS-CARINII DIHYDROFOLATE-REDUCTASE
被引:5
作者:
STAMMERS, DK
[1
]
DELVES, C
[1
]
BALLANTINE, S
[1
]
JONES, EY
[1
]
STUART, DI
[1
]
ACHARI, A
[1
]
BRYANT, PK
[1
]
CHAMPNESS, JN
[1
]
机构:
[1] UNIV OXFORD,DEPT BIOCHEM,MOLEC BIOPHYS LAB,OXFORD OX1 3QU,ENGLAND
关键词:
PNEUMOCYSTIS-CARINII;
DHFR;
AIDS;
CRYSTALS;
X-RAY DIFFRACTION;
D O I:
10.1006/jmbi.1993.1183
中图分类号:
Q5 [生物化学];
Q7 [分子生物学];
学科分类号:
071010 ;
081704 ;
摘要:
Dihydrofolate reductase from Pneumocytis carinii has been crystallized in a form suitable for high resolution X-ray diffraction studies. Recombinant enzyme that had been refolded following solubilization in guanidinium hydrochloride was crystallized as both a ternary complex with the cofactor NADPH and the inhibitor trimethoprim as well as a binary complex with NADPH. The two types of complex crystallized isomorphously from polyethylene glycol using sitting-drop vapour diffusion. The crystals were of space group P 21 with unit cell parameters, a = 69·9 Å, b = 43·6 Å, c = 37·6 Å, β = 117·7°, with one molecule per asymmetric unit. The crystals diffracted to 1·8 Å resolution. © 1993 Academic Press Limited.
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页码:679 / 680
页数:2
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