Atomic structure of the KEOPS complex: an ancient protein kinase-containing molecular machine.
Atomic structure of the KEOPS complex: an ancient protein kinase-containing molecular machine.
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DOI:
10.1016/j.molcel.2008.10.002
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发表时间:
2008-10-24
期刊:
影响因子:
16
通讯作者:
Sicheri, Frank
中科院分区:
文献类型:
--
作者:
Mao, Daniel Y. L.;Neculai, Dante;Downey, Michael;Orlicky, Stephen;Haffani, Yosr Z.;Ceccarelli, Derek F.;Ho, Jenny S. L.;Szilard, Rachel K.;Zhang, Wei;Ho, Cynthia S.;Wan, Leo;Fares, Christophe;Rumpel, Sigrun;Kurinov, Igor;Arrowsmith, Cheryl H.;Durocher, Daniel;Sicheri, Frank
Kae1 is a universally conserved ATPase and part of the essential gene set in bacteria. In archaea and eukaryotes, Kae1 is embedded within the protein kinase-containing KEOPS complex. Mutation of KEOPS subunits in yeast leads to striking telomere and transcription defects but the exact biochemical function of KEOPS is not known. As a first step to elucidating its function, we solved the atomic structure of archaea-derived KEOPS complexes involving Kae1, Bud32, Pcc1 and Cgi121 subunits. Our studies suggest that Kae1 is regulated at two levels by the primordial protein kinase Bud32, which is itself regulated by Cgi121. Moreover, Pcc1 appears to function as a dimerization module, perhaps suggesting that KEOPS may be a processive molecular machine. Lastly, as Bud32 lacks the conventional substrate-recognition infrastructure of eukaryotic protein kinases including an activation segment, Bud32 may provide a glimpse of the evolutionary history of the protein kinase family.
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DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
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通讯作者:
Cowtan, K
影响因子:
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作者:
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通讯作者:
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通讯作者:
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影响因子:
11.4
作者:
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通讯作者:
Libri, Domenico
影响因子:
8
作者:
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通讯作者:
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