Structure determination of histidine decarboxylase from Lactobacillus 30a at 3.0 A resolution.
Structure determination of histidine decarboxylase from Lactobacillus 30a at 3.0 A resolution.
复制标题
以 3.0 A 分辨率测定乳杆菌 30a 的组氨酸脱羧酶的结构。
DOI:
10.1016/0022-2836(85)90204-9
复制
发表时间:
1985
影响因子:
5.6
通讯作者:
Hackert,ML
中科院分区:
文献类型:
--
作者:
Parks,EH;Ernst,SR;Hamlin,R;Xuong,NH;Hackert,ML
The crystal structure of histidine decarboxylase from Lactobacillus 30a has been determined by X-ray diffraction methods to a resolution of 3.0 Å. This protein is a pyruvoyl-dependent enzyme that is formed by an unusual self-activation process. The structure was determined from an electron density map calculated using multiple isomorphous replacement phases from two heavy-atom derivatives and included contributions from anomalous scattering measurements. The final mean figure of merit was 0.79, based on 28,805 independent reflections. The molecule has an (αβ) 6 subunit composition and crystallizes in the space group I4 1 22 with a= b= 221.7 A ̊ and c= 107.1 A ̊. There is one (αβ) 3 half molecule per asymmetric unit. The (αβ) 6 particle is dumbbell-shaped, with each (αβ) 3 unit being approximately spherical, with a diameter of about 65 Å. There is a large central cavity approximately 30 Å deep around the molecular 3-fold axis of the (αβ) 3 unit. The 3-fold related active site pockets are located around the bottom of this cavity and are separated from each other by a distance of approximately 23 Å. The inner portion of each (αβ) unit, which lies near the interface between the two (αβ) 3 particles, consists mainly of random coil with several small helical and sheet regions. The outer region of each (αβ) unit has an unusual structure consisting of two overlapping, predominantly antiparallel β-pleated sheets, lined on each side by an α-helix. The walls of the central cavity are formed by the 3-fold repeat of two strands from this β-sandwich structure and one of the helices.
登录
查看更多内容
DOI:
--
发表时间:
1982
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Vaaler,GL;Recsei,PA;Fox,JL;Snell,EE
通讯作者:
Snell,EE
DOI:
10.1107/s0567739471000822
发表时间:
1971
期刊:
Acta Crystallographica Section A
影响因子:
--
作者:
G. Germain;P. Main
通讯作者:
P. Main
DOI:
10.1107/s0567740871005946
发表时间:
1971
期刊:
Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry
影响因子:
--
作者:
E. Dodson;M. Vijayan
通讯作者:
M. Vijayan
DOI:
10.1107/s0567740878006135
发表时间:
1978
期刊:
Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry
影响因子:
--
作者:
K. Wilson
通讯作者:
K. Wilson
影响因子:
13.8
作者:
E. Snell
通讯作者:
E. Snell