Identification of a two-domain antifreeze protein gene in Antarctic eelpout Lycodichthys dearborni
Polar Biology, ISSN: 0722-4060, Vol: 32, Issue: 1, Page: 35-40
2009
- 4Citations
- 10Captures
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Article Description
Type III antifreeze proteins (AFP III) in the Antarctic eelpout Lycodichthys dearborni contain at least two size variants-a 7-kDa protein family and a specific 14-kDa isoform composed of two 7-kDa domains linked in tandem. We report the characterization of a two-domain AFP III gene from L. dearborni, and propose that the two-domain AFP III gene arose from a single-domain AFP III gene through duplication and degeneration. AT-rich regions played an important role in the degeneration of the duplicated AFP III gene that resulted in the concatenation of two originally separated 7-kDa AFP-coding exons into a single gene. We also identified a pseudo-AFP III gene interrupted at an AT-rich coding region, supporting AT-rich regions as hotspots for DNA recombination in AFP III gene evolution. Interestingly, study of AFP III genes in the related Antarctic eelpout Pachycara brachycephalum showed absence of two- and multi-domain AFP III genes, indicating that modes of AFP III gene family evolution are specific within species. © 2008 Springer-Verlag.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=58549093918&origin=inward; http://dx.doi.org/10.1007/s00300-008-0499-8; http://link.springer.com/10.1007/s00300-008-0499-8; http://link.springer.com/content/pdf/10.1007/s00300-008-0499-8; http://link.springer.com/content/pdf/10.1007/s00300-008-0499-8.pdf; http://link.springer.com/article/10.1007/s00300-008-0499-8/fulltext.html; https://dx.doi.org/10.1007/s00300-008-0499-8; https://link.springer.com/article/10.1007/s00300-008-0499-8; http://www.springerlink.com/index/10.1007/s00300-008-0499-8; http://www.springerlink.com/index/pdf/10.1007/s00300-008-0499-8
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