Cation binding sites on the projected structure of bacteriorhodopsin.
Cation binding sites on the projected structure of bacteriorhodopsin.
复制标题
细菌视紫红质投影结构上的阳离子结合位点。
DOI:
10.1016/s0006-3495(86)83461-0
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发表时间:
1986
影响因子:
3.4
通讯作者:
Stroud,RM
中科院分区:
文献类型:
--
作者:
Katre,NV;Kimura,Y;Stroud,RM
Divalent cations are involved in the function of bacteriorhodopsin (bR) as a light-driven proton pump. If cations are removed from purple membranes they become blue. Divalent cations such as Ca2+ or Pb2+ or trivalent ions, can be stoichiometrically titrated back on to these deionized membranes. The color transitions as a function of ion concentration for Ca2+ or Pb2+ are precisely comparable and indicate that approximately three stoichiometric equivalents of cations are required to effect the color transition (Kimura et al., 1984). We found four main partially occupied binding sites for cations at a stoichiometric ratio of 3 Pb2+/bR. We localized the binding sites for Pb2+ using x-ray diffraction of membranes reconstituted with 1, 2, and 3 equivalents of Pb2+ per bR. The site of highest affinity is located on helix 7. At 2 Pb2+/bR, sites on helix 6 and between helix 2 and 3 are occupied. At 3 Pb2+/bR a fourth site above helix 3 is occupied.
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影响因子:
6.2
作者:
C. Eneroth;C. O. Henrikson;P. Jakobsson
通讯作者:
P. Jakobsson
DOI:
--
发表时间:
1964
期刊:
The Journal of Pathology and Bacteriology
影响因子:
--
作者:
J. Greenspan;M. Melamed;A. Pearse
通讯作者:
A. Pearse
影响因子:
2.6
作者:
CHERRY, CP;GLUCKSMANN, A
通讯作者:
GLUCKSMANN, A
DOI:
10.1016/0360-3016(82)90166-3
发表时间:
1982-01-01
影响因子:
7
作者:
MOSSMAN, K;SHATZMAN, A;CHENCHARICK, J
通讯作者:
CHENCHARICK, J
影响因子:
3.4
作者:
H. Kohn;R. Kallman;C. Berdjis;K. Ome
通讯作者:
K. Ome