Wang Z, Dong X, Ding G, Li Y. Comparing the retention mechanisms of tandem duplicates and retrogenes in human and mouse genomes.
Genet Sel Evol 2010;
42:24. [PMID:
20584267 PMCID:
PMC2902415 DOI:
10.1186/1297-9686-42-24]
[Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2010] [Accepted: 06/28/2010] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND
Multiple models have been proposed to interpret the retention of duplicated genes. In this study, we attempted to compare whether the duplicates arising from tandem duplications and retropositions are retained by the same mechanisms in human and mouse genomes.
RESULTS
Both sequence and expression similarity analyses revealed that tandem duplicates tend to be more conserved, whereas retrogenes tend to be more divergent. The duplicability of tandem duplicates is also higher than that of retrogenes. However, positive selection seems to play significant roles in the retention of both types of duplicates.
CONCLUSIONS
We propose that dosage effect is more prevalent in the retention of tandem duplicates, while 'escape from adaptive conflict' (EAC) effect is more prevalent in the retention of retrogenes.
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