BACKGROUND: Alternative splicing of messenger RNA permits the formation of a wide range of mature RNA transcripts and has the potential to generate a diverse spectrum of functional proteins. Although there is extensive evidence for large scale alternative splicing at the transcript level, there have been no comparable studies demonstrating the existence of alternatively spliced protein isoforms. RESULTS: Recent advances in proteomics technology have allowed us to carry out a comprehensive identification of protein isoforms in Drosophila. The analysis of this proteomic data confirmed the presence of multiple alternative gene products for over a hundred Drosophila genes. CONCLUSIONS: We demonstrate that proteomics techniques can detect the expression of stable alternative splice isoforms on a genome-wide scale. Many of these alternative isoforms are likely to have regions that are disordered in solution, and specific proteomics methodologies may be required to identify these peptides.
BACKGROUND: Alternative splicing of messenger RNA permits the formation of a wide range of mature RNA transcripts and has the potential to generate a diverse spectrum of functional proteins. Although there is extensive evidence for large scale alternative splicing at the transcript level, there have been no comparable studies demonstrating the existence of alternatively spliced protein isoforms. RESULTS: Recent advances in proteomics technology have allowed us to carry out a comprehensive identification of protein isoforms in Drosophila. The analysis of this proteomic data confirmed the presence of multiple alternative gene products for over a hundred Drosophila genes. CONCLUSIONS: We demonstrate that proteomics techniques can detect the expression of stable alternative splice isoforms on a genome-wide scale. Many of these alternative isoforms are likely to have regions that are disordered in solution, and specific proteomics methodologies may be required to identify these peptides.
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