ISSN:
1432-1432
Keywords:
Key words: Calpain — Gene duplication — Tetraploidization — Chordate evolution — Paralogous chromosome regions
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract. Calpains, the Ca2+-dependent intracellular proteinases, are involved in the regulation of distinct cellular pathways including signal transduction and processing, cytoskeleton dynamics, and muscle homeostasis. To investigate the evolutionary origin of diverse calpain subfamilies, a phylogenetic study was carried out. The topology of the calpain phylogenetic tree has shown that some of the gene duplications occurred before the divergence of the protostome and deuterostome lineages. Other gene doublings, leading to vertebrate-specific calpain forms, took place during early chordate evolution and coincided with genome duplications as disclosed by the localization of calpain genes to paralogous chromosome regions in the human genome. On the basis of the phylogenetic tree, the time of gene duplications, and the localization of calpain genes, we propose a model of tandem and chromosome duplications for the evolution of vertebrate-specific calpain forms. The data presented here are consistent with scenarios proposed for the evolution of other multigene families.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/PL00006549
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