Evolution of metal selectivity in templated protein interfaces.
Evolution of metal selectivity in templated protein interfaces.
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DOI:
10.1021/ja910844n
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发表时间:
2010-06-30
影响因子:
15
通讯作者:
Tezcan FA
中科院分区:
文献类型:
--
作者:
Brodin JD;Medina-Morales A;Ni T;Salgado EN;Ambroggio XI;Tezcan FA
Selective binding by metalloproteins to their cognate metal ions is essential to cellular survival. How proteins originally acquired the ability to selectively bind metals and evolved a diverse array of metal-centered functions despite the availability of only a few metal-coordinating functionalities remains an open question. Using a rational design approach (Metal-Templated Interface Redesign), we describe the transformation of a monomeric electron transfer protein, cytochrome cb562, into a tetrameric assembly (C96RIDC-1) that stably and selectively binds Zn2+, and displays a metal-dependent conformational change reminiscent of a signaling protein. A thorough analysis of the metal binding properties of C96RIDC-14 reveals that it can also stably harbor other divalent metals with affinities that rival (Ni2+) or even exceed (Cu2+) those of Zn2+ on a per site basis. Nevertheless, this analysis suggests that our templating strategy also introduces an increased bias towards binding a higher number of Zn2+ ions (4 high affinity sites) versus Cu2+ or Ni2+ (2 high affinity sites), ultimately leading to the exclusive selectivity of C96RIDC-14 for Zn2 over those ions. More generally, our results indicate that an initial metal-driven nucleation event followed by the formation of a stable protein architecture around the metal provides a straightforward path for generating structural and functional diversity.
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DOI:
10.1038/nsb723
发表时间:
2001-12-01
期刊:
NATURE STRUCTURAL BIOLOGY
影响因子:
--
作者:
Krantz, BA;Sosnick, TR
通讯作者:
Sosnick, TR
影响因子:
15
作者:
CREASER, II;GEUE, RJ;SPRINGBORG, J
通讯作者:
SPRINGBORG, J
DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K
DOI:
10.1107/s0907444998003254
发表时间:
1998-09-01
期刊:
ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY
影响因子:
--
作者:
Brunger, AT;Adams, PD;Warren, GL
通讯作者:
Warren, GL
影响因子:
3.9
作者:
Liu, CL;Xu, HB
通讯作者:
Xu, HB