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Annotation of the Daphnia magna nuclear receptors: comparison to Daphnia pulex.


ABSTRACT: Most nuclear receptors (NRs) are ligand-dependent transcription factors crucial in homeostatic physiological responses or environmental responses. We annotated the Daphnia magna NRs and compared them to Daphnia pulex and other species, primarily through phylogenetic analysis. Daphnia species contain 26 NRs spanning all seven gene subfamilies. Thirteen of the 26 receptors found in Daphnia species phylogenetically segregate into the NR1 subfamily, primarily involved in energy metabolism and resource allocation. Some of the Daphnia NRs, such as RXR, HR96, and E75 show strong conservation between D. magna and D. pulex. Other receptors, such as EcRb, THRL-11 and RARL-10 have diverged considerably and therefore may show different functions in the two species. Curiously, there is an inverse association between the number of NR splice variants and conservation of the LBD. Overall, D. pulex and D. magna possess the same NRs; however not all of the NRs demonstrate high conservation indicating the potential for a divergence of function.

SUBMITTER: Litoff EJ 

PROVIDER: S-EPMC4186893 | biostudies-literature | 2014 Nov

REPOSITORIES: biostudies-literature

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Annotation of the Daphnia magna nuclear receptors: comparison to Daphnia pulex.

Litoff Elizabeth J EJ   Garriott Travis E TE   Ginjupalli Gautam K GK   Butler LaToya L   Gay Claudy C   Scott Kiandra K   Baldwin William S WS  

Gene 20140917 1


Most nuclear receptors (NRs) are ligand-dependent transcription factors crucial in homeostatic physiological responses or environmental responses. We annotated the Daphnia magna NRs and compared them to Daphnia pulex and other species, primarily through phylogenetic analysis. Daphnia species contain 26 NRs spanning all seven gene subfamilies. Thirteen of the 26 receptors found in Daphnia species phylogenetically segregate into the NR1 subfamily, primarily involved in energy metabolism and resour  ...[more]

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