Molecular characterization and bioinformatics analysis of Ncoa7B, a novel ovulation-associated and reproduction system-specific Ncoa7 isoform

Ketty Shkolnik, Shifra Ben-Dor, Dalia Galiani, Ariel Hourvitz, Nava Dekel*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

In the present work, we employed bioinformatics search tools to select ovulation-associated cDNA clones with a preference for those representing putative novel genes. Detailed characterization of one of these transcripts, 6C3, by real-time PCR and RACE analyses led to identification of a novel ovulation-associated gene, designated Ncoa7B. This gene was found to exhibit a significant homology to the Ncoa7 gene that encodes a conserved tissue-specific nuclear receptor coactivator. Unlike Ncoa7, Ncoa7B possesses a unique and highly conserve exon at the 5′ end and encodes a protein with a unique N-terminal sequence. Extensive bioinformatics analysis has revealed that Ncoa7B has one identifiable domain, TLDc, which has recently been suggested to be involved in protection from oxidative DNA damage. An alignment of TLDc domain containing proteins was performed, and the closest relative identified was OXR1, which also has a corresponding, highly related short isoform, with just a TLDc domain. Moreover, Ncoa7B expression, as seen to date, seems to be restricted to mammals, while other TLDc family members have no such restriction. Multiple tissue analysis revealed that unlike Ncoa7, which was abundant in a variety of tissues with the highest expression in the brain, Ncoa7B mRNA expression is restricted to the reproductive system organs, particularly the uterus and the ovary. The ovarian expression of Ncoa7B was stimulated by human chorionic gonadotropin. Additionally, using real-time PCR, we demonstrated the involvement of multiple signaling pathways for Ncoa7B expression on preovulatory follicles.

Original languageEnglish
Pages (from-to)321-333
Number of pages13
JournalReproduction
Volume135
Issue number3
DOIs
StatePublished - Mar 2008
Externally publishedYes

Fingerprint

Dive into the research topics of 'Molecular characterization and bioinformatics analysis of Ncoa7B, a novel ovulation-associated and reproduction system-specific Ncoa7 isoform'. Together they form a unique fingerprint.

Cite this