The effect of the side chain length of Asp and Glu on coordination structure of Cu(2+) in a de novo designed protein.
The effect of the side chain length of Asp and Glu on coordination structure of Cu(2+) in a de novo designed protein.
复制标题
从头设计的蛋白质中,Asp 和 Glu 的侧链长度对 Cu(2) 配位结构的影响。
DOI:
10.1002/bip.21277
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发表时间:
2009
期刊:
影响因子:
2.9
通讯作者:
Toshiki Tanaka
中科院分区:
文献类型:
--
作者:
Daigo Shiga;Daisuke Nakane;Tomohiko Inomata;H. Masuda;M. Oda;M. Noda;S. Uchiyama;K. Fukui;Y. Takano;Haruki Nakamura;T. Mizuno;Toshiki Tanaka
Metal ions in proteins are important not only for the formation of the proper structures but also for various biological activities. For biological functions such as hydrolysis and oxidation, metal ions often adopt unusual coordination structures. We constructed a stable scaffold for metal binding to create distorted metal coordination structures. A stable four stranded alpha-helical coiled-coil structure was used as the scaffold, and the metal binding site was in the cavity created at the center of the structure. Two His residues and one Asp or Glu residue were used to coordinate the metal ions, AM2D and AM2E, respectively. Cu(2+) bound to AM2D with an equatorial planar coordination structure with two His, one Asp, and H(2)O as detected by electron spin resonance and UV spectral analyzes. On the other hand, Cu(2+) had a slightly distorted square planar structure when it bound two His and Glu in AM2E, due to the longer side-chain of the Glu residue as compared to the Asp residue. Computational analysis also supported the distorted coordination structure of Cu(2+) in AM2E. This construct should be useful to create various coordinations of metal ions for catalytic functions.
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影响因子:
2.9
作者:
Campbell,KathleenM;Lumb,KevinJ
通讯作者:
Lumb,KevinJ
影响因子:
2.9
作者:
Liu, Jie;Deng, Yiqun;Lu, Min
通讯作者:
Lu, Min
影响因子:
56.9
作者:
HARBURY, PB;ZHANG, T;ALBER, T
通讯作者:
ALBER, T
DOI:
--
发表时间:
1994
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Rao,GH;Fields,CG;White,JG;Fields,GB
通讯作者:
Fields,GB
影响因子:
2.9
作者:
J. Johansson;B. Gibney;F. Rabanal;K. Reddy;P. Dutton
通讯作者:
J. Johansson;B. Gibney;F. Rabanal;K. Reddy;P. Dutton