GATA3 (GATA binding protein 3)

Abstract

IdentityOther names: HDR, HDRS, MGC2346, MGC5199, MGC5445 HGNC (Hugo): GATA3 Location: 10p14 DNA/RNA DescriptionThe GATA3 locus spans 20,51 kb and contains 6 exons. TranscriptionTwo alternative exons 1 (1a and 1b) of the Gata3 locus are spliced to a common second exon, which contains the translation start site. All transcripts share exons 2 to 5 but transcript 1a and 1b splice to two variant exons 6 (6a and 6b respectively) giving rise to isoform a (1a-2-5-6a) and isoform b (1b-2-5-6b) (see figure 1) (Asnagli et al., 2002). The functional significance of these isoforms is unclear. Protein DescriptionThe full length GATA3 protein contain either 443 AA (isoform a) or 444 AA (isoform b), corresponding to molecular weights of 47,9 kDa and 48,0 kDa respectively. The GATA3 protein contains two zinc finger motifs of a distinctive form CXNCX (17) and CNXC as well as two transactivation domains (TA1 and TA2). The N-terminal Zn finger (Zn1) is known to stabilize DNA binding and interact with other zinc finger proteins, whereas the C-terminal Zn finger (Zn2) binds DNA.