alexa Protein expression patterns in zebrafish skeletal muscle: initial characterization and the effects of hypoxic exposure.
Bioinformatics & Systems Biology

Bioinformatics & Systems Biology

Journal of Proteomics & Bioinformatics

Author(s): Bosworth CA th, Chou CW, Cole RB, Rees BB

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Abstract Patterns of protein expression were examined in white skeletal muscle from adult zebrafish (Danio rerio). High resolution two-dimensional gel electrophoresis resolved between 300 and 400 spots with molecular masses between 20 and 120 kDa and isoelectric points between about 5 and 8. Forty spots, representing a range of protein size, charge, and abundance were excised, digested with trypsin, and subjected to matrix-assisted laser-desorption/ionisation-time of flight mass spectrometry for protein identification. Twenty-nine spots were identified, including enzymes of energy metabolism, contractile proteins, an iron transport protein, and a heat shock protein. In addition, several spots matched theoretical proteins predicted from genome sequencing. These theoretical proteins were tentatively identified by similarity to known proteins. Patterns of muscle protein expression were then measured after zebrafish were exposed to low oxygen (16 torr) for 48 h, an exposure previously shown to increase the survival of zebrafish at more severe reductions in oxygen. Exposure to low oxygen (hypoxia) did not change the general pattern of protein expression but did affect the amounts of six low abundance proteins. The relatively subtle effects of hypoxia on patterns of muscle protein expression contrasts the widespread changes previously documented in mRNA levels in this and other species of fish during hypoxic stress. The difference between protein and mRNA expression illustrates the need to integrate both measures for a more complete understanding of gene expression in fish during hypoxic exposure. This article was published in Proteomics and referenced in Journal of Proteomics & Bioinformatics

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