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A C Laverriere

Publications and source records attributed to A C Laverriere.

3 recordsLinked to original sources
PubMed1997

Transcripts for functionally distinct isoforms of chicken GATA-5 are differentially expressed from alternative first exons.

Our analysis of cDNA and genomic clones unexpectedly revealed that the chicken gata-5 gene is differentially expressed from alternative first exons. Moreover, we show that the respective transcripts are differentially processed to yield mRNAs for two distinct isoforms of GATA-5. The major isoform, which we described previously, has two CXNCX17CNXC zinc fingers typical of a vertebrate GATA factor. The minor isoform, on the other hand, has only one such zinc finger. We show that this novel isoform localizes within the nuclei of transfected cells and can bind to a consensus GATA site. This truncated isoform of GATA-5 is compromised in its ability to transactivate a simple target gene, however, and thus is functionally distinct from the major isoform of GATA-5.

Amino Acid Sequence↗
PubMed1994

GATA-4/5/6, a subfamily of three transcription factors transcribed in developing heart and gut.

We describe experiments which show that: 1) two previously identified members of the GATA family of transcription factors (both of which were originally called GATA-4) correspond to chicken cDNAs for two distinct factors (which we now refer to as cGATA-4 and cGATA-5); 2) another new member of this family corresponds to a third factor designated cGATA-6; 3) each of these mRNAs displays a differential expression pattern. The cGATA-5 gene is initially transcribed in the cardiac crescent prior to formation of the primordial heart tube. Following formation of the primitive heart, cGATA-5 transcripts are evident in both endocardium and myocardium as well as in other lateral plate derivatives. The cGATA-5 gene is also transcribed in the primitive embryonic gut and in late stage embryos is sequentially up-regulated in distinct segments of gastrointestinal epithelia as they undergo terminal differentiation. These studies thus provide novel insights into tissue-specific regulation by GATA-5, as well as into possibly overlapping regulatory functions for these three family members.

Animals↗