The Dimerization of an a / b-Knotted Protein Is Essential for Structure and Function
The Dimerization of an a / b-Knotted Protein Is Essential for Structure and Function
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a / b 结蛋白的二聚化对于结构和功能至关重要
DOI:
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发表时间:
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期刊:
影响因子:
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通讯作者:
S. Jackson
中科院分区:
文献类型:
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作者:
Anna L. Mallam;S. Jackson
a/b-Knotted proteins are an extraordinary example of biological self-assembly; they contain a deep topological trefoil knot formed by the backbone polypeptide chain. Evidence suggests that all are dimeric and function as methyltransferases, and the deep knot forms part of the active site. We investigated the significance of the dimeric structure of the a/b-knot protein, YibK, from Haemophilus influenzae by the design and engineering of monomeric versions of the protein, followed by examination of their structural, functional, stability, and kinetic folding properties. Monomeric forms of YibK display similar characteristics to an intermediate species populated during the formation of the wild-type dimer. However, a notable loss in structure involving disruption to the active site, rendering it incapable of cofactor binding, is observed in monomeric YibK. Thus, dimerization is vital for preservation of the native structure and, therefore, activity of the protein.
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DOI:
10.1073/pnas.93.11.5374
发表时间:
1996-05-28
影响因子:
11.1
作者:
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通讯作者:
Tolan, DR
DOI:
10.1021/bi9707786
发表时间:
1997
期刊:
Biochemistry.
影响因子:
--
作者:
Shao,X;Hensley,P;Matthews,CR
通讯作者:
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影响因子:
1.2
作者:
Vivek Anantharaman;E. Koonin;L. Aravind
通讯作者:
Vivek Anantharaman;E. Koonin;L. Aravind
影响因子:
3.8
作者:
Wallace,LouiseA;Matthews,CRobert
通讯作者:
Matthews,CRobert
DOI:
10.1073/pnas.100547697
发表时间:
2000-05-23
影响因子:
11.1
作者:
Heidary, DK;O'Neill, JC;Jennings, PA
通讯作者:
Jennings, PA