The importance of surface loops for stabilizing an eightfold βα barrel protein
The importance of surface loops for stabilizing an eightfold βα barrel protein
复制标题
表面环对于稳定八倍 βα 桶蛋白的重要性
DOI:
10.1002/pro.5560010105
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发表时间:
1992
期刊:
影响因子:
8
通讯作者:
K. Kirschner
中科院分区:
文献类型:
--
作者:
R. Urfer;K. Kirschner
An important step in understanding how a protein folds is to determine those regions of the sequence that are critical to both its stability and its folding pathway. We chose phosphoribosyl anthranilate isomerase from Escherichia coli, which is a monomeric representative of the (βα)8 barrel family of proteins, to construct a variant that carries an internal tandem duplication of the fifth βα module. This (βα)9 variant was enzymically active and therefore must have a wild‐type (βα)8 core. It had a choice a priori to fold to three different folding frames, which are distinguished by carrying the duplicated segment as an insert into one out of three different loops. Steady‐state kinetic constants, the fluorescence properties of a crucial tryptophan residue, and limited proteolysis showed that the stable (βα)9 variant carries the insertion between β‐strand 5 and α‐helix 5. This preference can be explained by the important role of loops between α helices and β strands in stabilizing the structure of the enzyme.
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DOI:
--
发表时间:
1987
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Crawford,IP;Clarke,M;vanCleemput,M;Yanofsky,C
通讯作者:
Yanofsky,C
影响因子:
56.9
作者:
WILSON, DK;RUDOLPH, FB;QUIOCHO, FA
通讯作者:
QUIOCHO, FA
影响因子:
56.9
作者:
LESZCZYNSKI, JF;ROSE, GD
通讯作者:
ROSE, GD
DOI:
10.1073/pnas.78.4.2169
发表时间:
1981
影响因子:
11.1
作者:
Schneider,WP;Nichols,BP;Yanofsky,C
通讯作者:
Yanofsky,C