Structure of the LKB1-STRAD-MO25 complex reveals an allosteric mechanism of kinase activation.
Structure of the LKB1-STRAD-MO25 complex reveals an allosteric mechanism of kinase activation.
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DOI:
10.1126/science.1178377
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发表时间:
2009-12-18
期刊:
影响因子:
--
通讯作者:
van Aalten DM
中科院分区:
文献类型:
--
作者:
Zeqiraj E;Filippi BM;Deak M;Alessi DR;van Aalten DM
The LKB1 tumor suppressor is a protein kinase that controls activity of adenine monophosphate-activated protein kinase (AMPK). LKB1 activity is regulated by the pseudokinase STRADα and the scaffolding protein MO25α, through an unknown, phosphorylation-independent, mechanism. We describe the structure of the core heterotrimeric LKB1-STRADα-MO25α complex, revealing an unusual allosteric mechanism of LKB1 activation. STRADα adopts a closed conformation typical of active protein kinases and binds LKB1 as a pseudosubstrate. STRADα and MO25α promote the active conformation of LKB1, which is stabilised by MO25α interacting with the LKB1 activation loop. This previously undescribed mechanism of kinase activation may be relevant to understanding the evolution of other pseudokinases. The structure also reveals how mutations found in Peutz-Jeghers syndrome and other cancers impair LKB1 function.
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影响因子:
--
作者:
Hawley SA;Boudeau J;Reid JL;Mustard KJ;Udd L;Mäkelä TP;Alessi DR;Hardie DG
通讯作者:
Hardie DG
影响因子:
56.9
作者:
Shaw, RJ;Lamia, KA;Cantley, LC
通讯作者:
Cantley, LC
影响因子:
11.4
作者:
Boudeau, J;Baas, AF;Alessi, DR
通讯作者:
Alessi, DR
影响因子:
64.8
作者:
Ji, Hongbin;Ramsey, Matthew R.;Wong, Kwok-Kin
通讯作者:
Wong, Kwok-Kin
DOI:
10.1111/j.1748-1716.2009.01972.x
发表时间:
2009-05
期刊:
Acta physiologica (Oxford, England)
影响因子:
--
作者:
Shaw RJ
通讯作者:
Shaw RJ