The chicken gene encoding the alpha isoform of tropomyosin of fast-twitch muscle fibers: organization, expression and identification of the major proteins synthesized.

Gene ·Vol. 107 ·No. 2 ·1991-11-15 ·Pages 229-40

Lemonnier M, Balvay L, Mouly V, Libri D, Fiszman MY

Abstract

The chicken gene alpha fTM encoding the alpha-tropomyosin of fast-twitch muscle fibers (alpha fTM) covers 20 kb and consists of 15 exons. From this gene, three types of mature transcripts (1.3 kb, 2 kb and 2.8 kb) are expressed through the use of alternative promoters, alternatively spliced exons and multiple 3' end processing. Northern analysis and S1 mapping have shown that the 1.3-kb transcript (exons 1a, 2b, 3, 4, 5, 6b, 7, 8, 9a-9b) is expressed in fast-twitch skeletal muscles and that 2-kb transcripts are expressed in smooth muscle (exons 1a, 2a, 3, 4, 5, 6b, 7, 8, 9d) and in fibroblasts (exons 1a, 2b, 3, 4, 5, 6a or 6b, 7, 8, 9d). These 2-kb transcripts encode distinct proteins which we have identified by two-dimensional (2D) gel electrophoresis. The 2.8-kb transcript which has not been so far characterized in birds is expressed in brain (exons 1b, 3, 4, 5, 6b, 7, 8, 9c-9d). This transcript has been characterized by a cDNA polymerase chain reaction assay and by S1 nuclease mapping. It produces a major TM isoform of chick brain which we have identified by 2D gels.

Related Genes

&agr fTM

MeSH Terms

Amino Acid Sequence Animals Base Sequence Blotting, Northern Brain/metabolism Chickens/genetics Exons/genetics Gene Expression/genetics Introns/genetics Molecular Sequence Data Muscles/metabolism Peptide Mapping Polymerase Chain Reaction Promoter Regions, Genetic/genetics Tropomyosin/genetics

Chemicals

Tropomyosin

Authors & Affiliations

5 authors, click to expand affiliations / ORCID

Lemonnier M

Unité de Biochimie (URA-CNRS1148), Institut Pasteur, Paris, France.

Balvay L

Mouly V

Libri D

Fiszman M Y

Article Info

Journal

Gene

Abbr.

Gene

ISSN

0378-1119

DOI

10.1016/0378-1119(91)90323-4

Published

1991-11-15

Pages

229-40

Language

English

Region

Netherlands

NLM ID

7706761

Subset

Databases

GENBANK

X57866, X57867, X57868, X57869, X57870, X57871, X57872, X57873, X57874, X57875, X57876, X57877, X57878, X57879, X57880, X57881, X57882, X57883, X57884, X57885, X57886, X57887, X57888, X57889, X57991, X57992, X57993, X57994, X57995, X57996

External Links

PubMed source DOI: 10.1016/0378-1119(91)90323-4 View journal details

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The chicken gene encoding the alpha isoform of tropomyosin of fast-twitch muscle fibers: organization, expression and identification of the major proteins synthesized.

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