Human Molecular Genetics, Vol 6, 1445-1450, Copyright © 1997 by Oxford University Press
A Pallavicini, R Zimbello, N Tiso, T Muraro, L Rampoldi, S Bortoluzzi, G Valle, G Lanfranchi and GA Danieli
By sequencing 11,405 individual expressed sequence tags (ESTs) from a cDNA
library of a human skeletal muscle, we identified 1945 individual
transcripts, 725 of which showed no correspondence with known human genes.
We report here the chromosomal localization of 267 of these, obtained by
radiation hybrid (RH) mapping. The map position of additional 242 ESTs from
the same library, corresponding to known human genes, is also reported. The
resulting information provides a preliminary genomic transcriptional
profile of a human muscle. Several genes occur in clusters on different
chromosomes. Moreover, chromosomes 17, 19, 21 and X appear to be
significantly rich in muscle ESTs. By analysing several collections of ESTs
from different tissues, we observed significant deviations in the
distribution of ESTs by chromosome in fetal heart, adult brain and adult
retina, supporting the hypothesis that a non-random localization of genes
expressed in specific tissues might not be uncommon. The selective
concentration of expressed genes in some chromosomes and in specific
chromosomal subregions in a given tissue might reflect the existence of
batteries of genes under the same control mechanisms, regulating
tissue-specific gene expression.
ARTICLES
The preliminary transcript map of a human skeletal muscle
CRIBI Biotechnology Centre, University of Padua, Padova, Italy.
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