Crystal structures of chicken liver dihydrofolate reductase: binary thioNADP+ and ternary thioNADP+.biopterin complexes.
Crystal structures of chicken liver dihydrofolate reductase: binary thioNADP+ and ternary thioNADP+.biopterin complexes.
复制标题
鸡肝二氢叶酸还原酶的晶体结构:二元硫代NADP和三元硫代NADP.生物蝶呤复合物。
DOI:
10.1021/bi00078a008
复制
发表时间:
1993
期刊:
影响因子:
2.9
通讯作者:
Kraut,J
中科院分区:
文献类型:
--
作者:
McTigue,MA;Davies2nd,JF;Kaufman,BT;Kraut,J
MATERIALS AND METHODSThe ThioNADP+ Binary Complex. Dihydrofolate reduc-tase was purified from chicken livers as previously described (Kaufman & Kemerer, 1977). Crystals were grown by a procedure similar to that used for crystallization of the cDHFR-NADPH complex (Volz et al., 1982). A 200-mL aliquot of a solution containing 15 mg/mL cDHFR, 2 mM thioNADP+(Sigma Chemical), 10 mM calcium acetate, 2 mM dithiothreitol, and 20 mM Tris-HCl buffered at pH 7.5 was put in a 1-mL beaker, which was placed on a platform suspended inside a glass dish above 15 mL of a reservoir solution containing 23%(v/v) ethanol, 10 mM calcium acetate, and 20 mM Tris-HCl bufferedat pH 7.5. The crystallization dish was covered, and theprotein solution was allowed to equilibrate with the reservoir solution by vapor diffusion at 4 C. Large crystals (~ 1.2 X 0.5 X 0.3 mm) belonging to space group C2 with a- 89.0 k, b= 48.2 k, c= 64.1 Á, and ß= 124.6 appeared within 3 days. Crystals chosen for data collection were rinsed in a solution containing 40% ethanol, 10 mM calcium acetate, 2 mM thioNADP" 1", and 20 mM Tris-HCl buffered at pH 7.5 before they were mounted in glass capillaries. A set of reflectionintensities comprising 24 984 observations of 8627 unique reflections was collected on one crystal at ambient temperature (~ 20 C) using the UCSD Multiwire Area Detector (Cork et al., 1973; Xuong et al., 1985). After the data were processed by locally developed programs (Anderson, 1987), the Riym3 was 0.03 for a data set containing 87% of all unique reflections to a Bragg spacing of 2.3 Á.
登录
查看更多内容
DOI:
10.2210/pdb3dfr/pdb
发表时间:
1982-11
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
J. Bolin;D. Filman;D. Matthews;R. Hamlin;J. Kraut
通讯作者:
J. Bolin;D. Filman;D. Matthews;R. Hamlin;J. Kraut
影响因子:
2.9
作者:
E. Hyde;B. Birdsall;G. Roberts;J. Feeney;A. Burgen
通讯作者:
A. Burgen
影响因子:
2.9
作者:
B. Birdsall;A. Burgen;G. Roberts
通讯作者:
G. Roberts
影响因子:
2.7
作者:
S. Matsuura;T. Sugimoto;S. Murata;Y. Sugawara;H. Iwasaki
通讯作者:
H. Iwasaki
影响因子:
3.9
作者:
T. Williams;T. K. Lee;R. Dunlap
通讯作者:
R. Dunlap