Warning: file_get_contents(https://eutils.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&id=25400101
&cmd=llinks): Failed to open stream: HTTP request failed! HTTP/1.1 429 Too Many Requests
in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 215
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 245.2 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\25400101
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Bioessays
2015 ; 37
(2
): 148-54
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Introns and gene expression: cellular constraints, transcriptional regulation,
and evolutionary consequences
#MMPMID25400101
Heyn P
; Kalinka AT
; Tomancak P
; Neugebauer KM
Bioessays
2015[Feb]; 37
(2
): 148-54
PMID25400101
show ga
A gene's "expression profile" denotes the number of transcripts present relative
to all other transcripts. The overall rate of transcript production is determined
by transcription and RNA processing rates. While the speed of elongating RNA
polymerase II has been characterized for many different genes and organisms,
gene-architectural features - primarily the number and length of exons and
introns - have recently emerged as important regulatory players. Several new
studies indicate that rapidly cycling cells constrain gene-architecture toward
short genes with a few introns, allowing efficient expression during short cell
cycles. In contrast, longer genes with long introns exhibit delayed expression,
which can serve as timing mechanisms for patterning processes. These findings
indicate that cell cycle constraints drive the evolution of gene-architecture and
shape the transcriptome of a given cell type. Furthermore, a tendency for short
genes to be evolutionarily young hints at links between cellular constraints and
the evolution of animal ontogeny.