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Ovarian Kaleidoscope Database (OKdb)

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T-box 4 OKDB#: 4931
 Symbols: TBX4 Species: human
 Synonyms: SPS,  Locus: 17q21-q22 in Homo sapiens


For retrieval of Nucleotide and Amino Acid sequences please go to: OMIM Entrez Gene
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General Comment NCBI Summary: This gene is a member of a phylogenetically conserved family of genes that share a common DNA-binding domain, the T-box. T-box genes encode transcription factors involved in the regulation of developmental processes. This gene is the human homolog of mouse Tbx4, which is closely linked to Tbx2 on mouse chromosome 11. Similarly this gene, like TBX2, maps to human chromosome 17. Expression studies in mouse and chicken show that Tbx4 is expressed in developing hindlimb, but not in forelimb buds, suggesting a role for this gene in regulating limb development and specification of limb identity. [provided by RefSeq, Jul 2008]
General function Nucleic acid binding, DNA binding, Transcription factor
Comment
Cellular localization Nuclear
Comment
Ovarian function Follicle endowment
Comment I
Expression regulated by
Comment
Ovarian localization Oocyte
Comment
Follicle stages Primordial, Primary, Secondary, Antral
Comment
Phenotypes
Mutations 1 mutations

Species: mouse
Mutation name: None
type: null mutation
fertility: fertile
Comment: Investigating the Role of Tbx4 in the Female Germline in Mice. Douglas NC 2013 et al. Normal development of germ cells is essential for fertility and mammalian reproduction. Although abnormal development of oocytes or follicles may lead to primary ovarian insufficiency (POI), a disorder that causes infertility in 1% of women less than 40 yr of age, the genes and signaling pathways activated in POI are not as yet fully elucidated. Tbx4, a member of the T-box family of transcription factors, is expressed in embryonic germ cells and postnatal oocytes at all stages of folliculogenesis. To investigate the requirement for Tbx4 in the germline, we analyzed germ cell development in the absence of Tbx4. We show that primordial germ cells (PGCs) are reduced in Tbx4 homozygous null (Tbx4(-/-)) embryos at Embryonic Day (E) 10.0. Tbx4(-/-) embryos die by E10.5; to study later time points in vitro a tamoxifen inducible estrogen receptor Cre recombinase was used to delete Tbx4 conditional mutant alleles. In addition, Gdf9cre and Zp3cre, two oocyte-specific Cre recombinases, were used to delete Tbx4 from postnatal primordial and primary follicles, respectively. We show that in vitro differentiation of the gonad into morphologically distinct testes and ovaries occurs normally when Tbx4 is deleted starting at E11.5. In Gdf9cre; Tbx4(fl/-) and Zp3cre; Tbx4(fl/-) adult females, primordial, primary, secondary, and antral follicles form, ovulation occurs, corpus luteum formation is normal, and the mice are fertile without any evidence of diminished ovarian reserve. Although postnatal deletion of Tbx4 in oocytes does not obviously impair fertility, it is possible that the reduction in PGCs observed in Tbx4 homozygous null mutant embryos could affect long-term fertility in adults. /////////////////////////

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Phenotypes and GWAS show phenotypes and GWAS
Links
OMIM (Online Mendelian Inheritance in Man: an excellent source of general gene description and genetic information.)
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created: Oct. 4, 2013, 10:48 a.m. by: hsueh   email:
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last update: Oct. 4, 2013, 10:50 a.m. by: hsueh    email:



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