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2017 ; 168
(5
): 843-855.e13
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
UV Irradiation Induces a Non-coding RNA that Functionally Opposes the Protein
Encoded by the Same Gene
#MMPMID28215706
Williamson L
; Saponaro M
; Boeing S
; East P
; Mitter R
; Kantidakis T
; Kelly GP
; Lobley A
; Walker J
; Spencer-Dene B
; Howell M
; Stewart A
; Svejstrup JQ
Cell
2017[Feb]; 168
(5
): 843-855.e13
PMID28215706
show ga
The transcription-related DNA damage response was analyzed on a genome-wide scale
with great spatial and temporal resolution. Upon UV irradiation, a slowdown of
transcript elongation and restriction of gene activity to the promoter-proximal
?25 kb is observed. This is associated with a shift from expression of long mRNAs
to shorter isoforms, incorporating alternative last exons (ALEs) that are more
proximal to the transcription start site. Notably, this includes a shift from a
protein-coding ASCC3 mRNA to a shorter ALE isoform of which the RNA, rather than
an encoded protein, is critical for the eventual recovery of transcription. The
non-coding ASCC3 isoform counteracts the function of the protein-coding isoform,
indicating crosstalk between them. Thus, the ASCC3 gene expresses both coding and
non-coding transcript isoforms with opposite effects on transcription recovery
after UV-induced DNA damage.