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Ovarian Kaleidoscope Database (OKdb)

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TOX OKDB#: 2400
 Symbols: TOX Species: human
 Synonyms:  Locus:


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General Comment Kang YL,et al reported that a Novel PEPP Homeobox Gene, TOX, Is Highly Glutamic Acid Rich and Specifically Expressed in Murine Testis and Ovary. The homeobox gene superfamily has been highly conserved throughout evolution. These genes act as transcription factors during several important developmental processes. To explore the functional roles of homeobox genes in spermatogenesis, the authors performed a degenerate oligonucleotide polymerase chain reaction (PCR) screening of a testis cDNA library and isolated a novel mouse homeobox gene. This gene, which was named Tox, encodes a homeodomain protein distantly related to members of the Paired/Pax (Prd/Pax) family. A phylogenetic analysis revealed Tox to be a member of the recently defined PEPP subfamily of Paired-like homeobox genes. Tox was mapped to chromosome X, with its homeodomain organized into three exons. A special feature of Tox is that the encoded protein sequence contains two poly-glutamic acid (poly E) stretches, which make Tox highly acidic. Tox transcripts were detected predominately in the testis and ovary of mice. Tox expression in testes was initiated soon after birth, mainly in Sertoli cells and spermatogonia; however, in adult mice, Tox expression shifts to the spermatids and spermatozoa. Tox expression in ovaries was detected in somatic cells of follicles, early on in theca cells, and in both granulosa and theca cells at the later stages of follicular development. Based on these results, Tox may play an important role during gametogenesis.

General function DNA binding, Transcription factor
Comment
Cellular localization Nuclear
Comment
Ovarian function
Comment
Expression regulated by
Comment
Ovarian localization Granulosa, Theca
Comment
Follicle stages
Comment
Phenotypes
Mutations 0 mutations
Genomic Region show genomic region
Phenotypes and GWAS show phenotypes and GWAS
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created: Feb. 26, 2004, 7:51 p.m. by: hsueh   email:
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last update: Feb. 26, 2004, 7:51 p.m. by: system    email:



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