Human Molecular Genetics, Vol 5, 1785-1791, Copyright © 1996 by Oxford University Press
PJ Byrd, PR Cooper, T Stankovic, HS Kullar, GD Watts, PJ Robinson and MR Taylor
In an earlier report we showed that the 5' end of the gene for ataxia
telangiectasia ATM is within 700 bp of the 5' end of a novel gene E14, and
suggested that the CpG island that separates these genes functions as a
bidirectional promoter. We have now determined the complete amino acid
sequence of the E14 protein, defined the exon/intron structure of the gene
and estimate that the complete gene is more than 55 kb in length. The E14
gene appears to be a housekeeping gene that is expressed in all tissues,
including all parts of the brain. The E14/ATM promoter organisation is
conserved in man, monkey and mouse, although the mouse promoter is more
compact and appears to lack two of the four putative Sp1 boxes found in the
human promoter. Reporter gene constructs showed that the human and mouse
E14/ATM promoters were indeed bidirectional, that the ATM side of the human
promoter was three times stronger than the E14 side, and that the mouse
promoter (in human cells) directed transcription with equal efficiency in
both directions, but at a lower level than the human promoter. Analysis of
a small number of A-T patients for mutations in the promoter region or the
E14 coding sequence did not provide evidence to suggest that E14
contributes to the A-T phenotype.
ARTICLES
A gene transcribed from the bidirectional ATM promoter coding for a serine rich protein: amino acid sequence, structure and expression studies
CRC Institute for Cancer Studies, University of Birmingham Medical School, UK.
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