Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\25730776
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Nat+Struct+Mol+Biol
2015 ; 22
(4
): 319-27
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Microprocessor mediates transcriptional termination of long noncoding RNA
transcripts hosting microRNAs
#MMPMID25730776
Dhir A
; Dhir S
; Proudfoot NJ
; Jopling CL
Nat Struct Mol Biol
2015[Apr]; 22
(4
): 319-27
PMID25730776
show ga
MicroRNAs (miRNAs) play a major part in the post-transcriptional regulation of
gene expression. Mammalian miRNA biogenesis begins with cotranscriptional
cleavage of RNA polymerase II (Pol II) transcripts by the Microprocessor complex.
Although most miRNAs are located within introns of protein-coding transcripts, a
substantial minority of miRNAs originate from long noncoding (lnc) RNAs, for
which transcript processing is largely uncharacterized. We show, by detailed
characterization of liver-specific lnc-pri-miR-122 and genome-wide analysis in
human cell lines, that most lncRNA transcripts containing miRNAs (lnc-pri-miRNAs)
do not use the canonical cleavage-and-polyadenylation pathway but instead use
Microprocessor cleavage to terminate transcription. Microprocessor inactivation
leads to extensive transcriptional readthrough of lnc-pri-miRNA and
transcriptional interference with downstream genes. Consequently we define a new
RNase III-mediated, polyadenylation-independent mechanism of Pol II transcription
termination in mammalian cells.