A regulatable switch mediates self-association in an immunoglobulin fold.
A regulatable switch mediates self-association in an immunoglobulin fold.
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DOI:
10.1038/nsmb.1483
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发表时间:
2008-09
影响因子:
16.8
通讯作者:
中科院分区:
文献类型:
--
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β-2 microglobulin (β2m) is a globular protein that self-associates into fibrillar amyloid deposits in patients undergoing hemodialysis therapy. Formation of these β-sheet–rich assemblies is a fundamental property of polypeptides that can be triggered by diverse conditions. For β2m, oligomerization into pre-amyloidogenic states occurs in specific response to coordination by Cu2+. Here we report the basis for this self-association at atomic resolution. Metal is not a direct participant in the molecular interface. Rather, binding results in distal alterations enabling the formation of two new surfaces. These interact to form a closed hexameric species. The origins of this include isomerization of a buried and conserved cis-proline previously implicated in the β2m aggregation pathway. The consequences of this isomerization are evident and reveal a molecular basis for the conversion of this robust monomeric protein into an amyloid-competent state.
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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:
10.1073/pnas.0403756101
发表时间:
2004-07-20
影响因子:
11.1
作者:
Ivanova, MI;Sawaya, MR;Eisenberg, D
通讯作者:
Eisenberg, D
影响因子:
8
作者:
Antwi, Kwasi;Mahar, Maura;Vachet, Richard W.
通讯作者:
Vachet, Richard W.
影响因子:
2.9
作者:
Eakin, CM;Attenello, FJ;Miranker, AD
通讯作者:
Miranker, AD
影响因子:
4.8
作者:
Jahn, Thomas R.;Tennent, Glenys A.;Radford, Sheena E.
通讯作者:
Radford, Sheena E.