Large number of ultraconserved elements were already present in the jawed vertebrate ancestor.
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Large Number of Ultraconserved Elements Were Already Present in the Jawed Vertebrate Ancestor
Type
ArticleKAUST Department
Competitive Research FundsComputational Bioscience Research Center (CBRC)
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
OCRF- Special Academic Partnership
Physical Science and Engineering (PSE) Division
Date
2008-12-23Permanent link to this record
http://hdl.handle.net/10754/581116
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Show full item recordAbstract
Stephen (2008) identified 13,736 ultraconserved elements (UCEs) in placental mammals and investigated their evolution in opossum, chicken, frog, and fugu. They found that there was a massive expansion of UCEs during tetrapod evolution and the substitution rate in UCEs showed a significant decline in tetrapods compared with fugu, suggesting they were exapted in tetrapods. They considered it unlikely that these elements are ancient but evolved at a higher rate in teleost fishes. In this study, we investigated the evolution of UCEs in a cartilaginous fish, the elephant shark and show that nearly half the UCEs were present in the jawed vertebrate ancestor. The substitution rate in UCEs is higher in fugu than in elephant shark, and approximately one-third of ancient UCEs have diverged beyond recognition in teleost fishes. These data indicate that UCEs have evolved at a higher rate in teleost fishes, which may have implications for their vast diversity and evolutionary success.Citation
Large number of ultraconserved elements were already present in the jawed vertebrate ancestor. 2009, 26 (3):487-90 Mol. Biol. Evol.Publisher
Oxford University Press (OUP)Journal
Molecular Biology and EvolutionPubMed ID
19052148Additional Links
http://mbe.oxfordjournals.org/content/26/3/487.longae974a485f413a2113503eed53cd6c53
10.1093/molbev/msn278
Scopus Count
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