Elucidation of the cause for reduced activity of abnormal human plasmin containing an Ala55‐Thr mutation: importance of highly conserved Ala55 in serine proteases
Elucidation of the cause for reduced activity of abnormal human plasmin containing an Ala55‐Thr mutation: importance of highly conserved Ala55 in serine proteases
复制标题
阐明含有 Ala55-Thr 突变的异常人纤溶酶活性降低的原因:高度保守的 Ala55 在丝氨酸蛋白酶中的重要性
DOI:
10.1016/s0014-5793(98)00280-4
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发表时间:
1998
期刊:
影响因子:
3.5
通讯作者:
H. Umeyama
中科院分区:
文献类型:
--
作者:
Mayuko Takeda;H. Umeyama
In serine proteases, Ala55is highly conserved and located just behind the catalytic triad. That the activity of human plasmin is reduced by the A55T substitution indicates the importance of Ala55in catalysis. In the present study, the 3-D model of A55T human plasmin shows that an unusual hydrogen bond between Thr55Oγ1 and His57Nϵ2 alters His57into an inactive conformation in which His57cannot accept a proton from Ser195as a catalytic base. Our results demonstrate that Ala55contributes heavily to the active conformation of His57and ensures the proton transfer from Ser195to His57.
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DOI:
10.1016/s0021-9258(19)39298-1
发表时间:
1990-04
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
T. Petersen;M. Martzen;A. Ichinose;E. Davie
通讯作者:
T. Petersen;M. Martzen;A. Ichinose;E. Davie
影响因子:
2.9
作者:
McGrath,ME;Vásquez,JR;Craik,CS;Yang,AS;Honig,B;Fletterick,RJ
通讯作者:
Fletterick,RJ
影响因子:
56.9
作者:
CRAIK, CS;ROCZNIAK, S;RUTTER, WJ
通讯作者:
RUTTER, WJ
影响因子:
2.9
作者:
WARSHEL, A;NARAYSZABO, G;HWANG, JK
通讯作者:
HWANG, JK