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2017 ; 8
(ä): 14861
Nephropedia Template TP
gab.com Text
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Twit Text #
English Wikipedia
The conserved protein Seb1 drives transcription termination by binding RNA
polymerase II and nascent RNA
#MMPMID28367989
Wittmann S
; Renner M
; Watts BR
; Adams O
; Huseyin M
; Baejen C
; El Omari K
; Kilchert C
; Heo DH
; Kecman T
; Cramer P
; Grimes JM
; Vasiljeva L
Nat Commun
2017[Apr]; 8
(ä): 14861
PMID28367989
show ga
Termination of RNA polymerase II (Pol II) transcription is an important step in
the transcription cycle, which involves the dislodgement of polymerase from DNA,
leading to release of a functional transcript. Recent studies have identified the
key players required for this process and showed that a common feature of these
proteins is a conserved domain that interacts with the phosphorylated C-terminus
of Pol II (CTD-interacting domain, CID). However, the mechanism by which
transcription termination is achieved is not understood. Using genome-wide
methods, here we show that the fission yeast CID-protein Seb1 is essential for
termination of protein-coding and non-coding genes through interaction with
S2-phosphorylated Pol II and nascent RNA. Furthermore, we present the crystal
structures of the Seb1 CTD- and RNA-binding modules. Unexpectedly, the latter
reveals an intertwined two-domain arrangement of a canonical RRM and second
domain. These results provide important insights into the mechanism underlying
eukaryotic transcription termination.