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XB-ART-24293
Proc Natl Acad Sci U S A December 1, 1991; 88 (23): 10642-6.
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Expression of GATA-binding proteins during embryonic development in Xenopus laevis.

Zon LI , Mather C , Burgess S , Bolce ME , Harland RM , Orkin SH .


Abstract
Proteins that recognize the core sequence GATA are important regulators of hematopoietic-specific gene transcription. We have characterized cDNAs encoding the Xenopus laevis homologues of three related transcription factors, designated GATA-1, -2, and -3. Comparative sequence analysis reveals strong conservation of the zinc-finger DNA-binding domain among all vertebrate GATA-binding proteins. GATA-2 and GATA-3 polypeptides are homologous throughout their entire sequences, whereas GATA-1 sequence is conserved only in the region responsible for DNA binding. In Xenopus, RNAs encoding GATA-binding proteins are expressed in both larval and adult erythroid cells. GATA-1, -2, and -3 RNAs are first detectable in early gastrula (Nieuwkoop developmental stage 11). This is earlier than the appearance of the early larval alpha T1 globin RNA (stage 15), beta T1 globin RNA (stage 26), or blood island formation (stage 30). The expression of GATA-1, -2, and -3 in early development may signal an early commitment of mesoderm to form hematopoietic tissue.

PubMed ID: 1961730
PMC ID: PMC52986
Article link: Proc Natl Acad Sci U S A
Grant support: [+]

Species referenced: Xenopus laevis
Genes referenced: agtr1 gata1 gata2 gata3 myod1


Article Images: [+] show captions
References [+] :
Banville, The nucleotide sequence of the mRNA encoding a tadpole beta-globin polypeptide of Xenopus laevis. 1983, Pubmed, Xenbase