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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

The genomic organization of a novel regulatory myosin light chain gene (MYL5) that maps to chromosome 4p16.3 and shows different patterns of expression between primates.

Myosin participates in a varying repertoire of cellular functions ranging from cytokinesis, receptor capping and secretion to sarcomere contraction. In vertebrates this functional complexity is achieved through the regulated expression of gene families encoding isoproteins for each of the myosin subunits. We report here the identification and characterization of a gene (MYL5) that encodes a novel regulatory myosin light chain isoprotein and maps 700 kb from the human chromosome 4p telomere. Identical cDNAs have been isolated from human adult retina and fetal muscle cDNA libraries. A full length 519 bp open reading frame was identified in the cDNA sequence encoding a predicted protein of 173 residues. Sequence analysis of a 5.6 kb genomic region that encodes these cDNAs revealed the presence of 7 exons which span 4 kb. Expression of this gene has been detected in human adult retina, cerebellum, basal ganglia and fetal skeletal muscle. Whereas Northern analysis fails to detect transcription of this gene in human adult skeletal muscle it reveals an abundant transcript in monkey skeletal muscle. Phylogenetic comparison of the predicted proteins primary structure to those of related myosin light chains from Drosophila, rat and human reveal evolutionarily conserved structural motifs important for both calcium binding and phosphorylation.[1]

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