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Eri1 degrades the stem-loop of oligouridylated histone mRNAs to induce replication-dependent decay.
Nat. Struct. Mol. Biol. 20, 73-81 (2013)
The exoRNase Eri1 inhibits RNA interference and trims the 5.8S rRNA 3' end. It also binds to the stem-loop of histone mRNAs, but the functional importance of this interaction remains elusive. Histone mRNAs are normally degraded at the end of S phase or after pharmacological inhibition of replication. Both processes are impaired in Eri1-deficient mouse cells, which instead accumulate oligouridylated histone mRNAs. Eri1 trims the mature histone mRNAs by two unpaired nucleotides at the 3' end but stalls close to the double-stranded stem. Upon oligouridylation of the histone mRNA, the Lsm1-7 heteroheptamer recognizes the oligo(U) tail and interacts with Eri1, whose catalytic activity is then able to degrade the stem-loop in a stepwise manner. These data demonstrate how degradation of histone mRNAs is initiated when 3' oligouridylation creates a cis element that enables Eri1 to process the double-stranded stem-loop structure.
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Publikationstyp
Artikel: Journalartikel
Dokumenttyp
Wissenschaftlicher Artikel
Schlagwörter
Binding-protein ; Translation Factors ; Dna-replication ; Microrna ; Yeast ; Degradation ; Uridylation ; Complex ; 3'-end ; 3'-exonuclease
ISSN (print) / ISBN
1545-9993
e-ISSN
1545-9985
Zeitschrift
Nature Structural & Molecular Biology
Quellenangaben
Band: 20,
Heft: 1,
Seiten: 73-81
Verlag
Nature Publishing Group
Verlagsort
New York, NY
Nichtpatentliteratur
Publikationen
Begutachtungsstatus
Peer reviewed