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Rat and mouse identifier sequences are preferentially but not exclusively located in cortical neuronal genes expressed postnatally
Author(s) -
Brown I. R.,
Danielson P.,
Rush S.,
Godbout M.,
Sutcliffe J. G.
Publication year - 1987
Publication title -
journal of neuroscience research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.72
H-Index - 160
eISSN - 1097-4547
pISSN - 0360-4012
DOI - 10.1002/jnr.490180202
Subject(s) - biology , rna , gene , intron , transcription (linguistics) , cerebral cortex , cerebellum , gene expression , rna polymerase ii , chromatin , microbiology and biotechnology , genetics , neuroscience , promoter , linguistics , philosophy
A genetic element called the identifier (ID) sequence, highly repeated in the rat genome, has previously been reported to be located in the introns of some genes transcribed in the adult rat brain by RNA polymerase II (Pol II). We show that nuclear RNA isolated from neurons of cerebral hemispheres (cortex) of 14‐day old rats is enrlched more than 10‐fold in ID sequences compared to nuclear RNA from liver, kidney, cerebellum, or cortical glia. The developmental onset of the difference is during the first 2 weeks after birth. Mouse cortical neuronal nuclear RNA is similarly enriched in an element related but not identical to the rat ID element, and the enrichment also has postnatal onset. The enriched appearnce of ID sequences in transcripts whose expression is increased postnatally in cortical neurons correlates developmentally and spatially with the transcription of ID elements by RNA polymerase III (Pol III) and with a change in chromatin structure.