The exosome contains domains with specific endoribonuclease, exoribonuclease and cytoplasmic mRNA decay activities.
The exosome contains domains with specific endoribonuclease, exoribonuclease and cytoplasmic mRNA decay activities.
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DOI:
10.1038/nsmb.1528
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发表时间:
2009-01
影响因子:
16.8
通讯作者:
van Hoof, Ambro
中科院分区:
文献类型:
--
作者:
Schaeffer, Daneen;Tsanova, Borislava;Barbas, Ana;Reis, Filipa Pereira;Dastidar, Eeshita Ghosh;Sanchez-Rotunno, Maya;Arraiano, Cecilia Maria;van Hoof, Ambro
The eukaryotic exosome is a ten subunit 3′ exoribonuclease complex responsible for many RNA processing and degradation reactions. How the exosome accomplishes this is unknown. We show that the PIN domain of Rrp44 is an endoribonuclease. The activity of the PIN domain prefers RNA with a 5′ phosphate, suggesting coordination of 5′ and 3′ processing. We also show that the endonuclease activity is important in vivo. Furthermore, the essential exosome subunit Csl4 does not contain any essential domains, but its zinc-ribbon domain is required for exosome-mediated mRNA decay. These results suggest that specific exosome domains contribute to specific functions, and that different RNAs interact with the exosome differently. The combination of an endoribonuclease and exoribonuclease activity appears to be a widespread feature of RNA degrading machines.
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DOI:
10.1083/jcb.136.4.761
发表时间:
1997-02-24
期刊:
The Journal of cell biology
影响因子:
--
作者:
Bashkirov VI;Scherthan H;Solinger JA;Buerstedde JM;Heyer WD
通讯作者:
Heyer WD
影响因子:
64.5
作者:
Chekanova, Julia A.;Gregory, Brian D.;Belostotsky, Dmitry A.
通讯作者:
Belostotsky, Dmitry A.
影响因子:
10.5
作者:
Allmang, C;Petfalski, E;Mitchell, P
通讯作者:
Mitchell, P
影响因子:
64.8
作者:
Frazao, Carlos;McVey, Colin E.;Carrondo, Maria A.
通讯作者:
Carrondo, Maria A.
影响因子:
16.8
作者:
Dziembowski, Andrzej;Lorentzen, Esben;Seraphin, Bertrand
通讯作者:
Seraphin, Bertrand