Journal
BIOCHIMIE
Volume 87, Issue 11, Pages 939-949Publisher
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.biochi.2005.06.008
Keywords
differential splicing; embryogenesis; Gallus; SAF-A; transcription factor
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Funding
- NCI NIH HHS [P01CA81534, CA076259] Funding Source: Medline
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Development proceeds through successive activation of different sets of genes by specific transcription factors as a consequence of cell interactions and signaling. It is thus of primary interest to identify new putative transcriptional regulators. We report here the isolation of chicken clones bearing sequences coding for a chicken zinc finger protein (chZFp) which contains four pairs of zinc fingers of mixed type C-2-H-C/C-2-H-2. At least five chZFp isoforms are produced through differential splicing of four small exons. The amino acid domains encoded by these four exons are highly conserved across species. Northern blot analysis and RNase-protection assays showed that chZFp transcripts are present in brain, heart, skin and liver during chick development. Reverse transcription mediated polymerase chain reaction (RT-PCR) experiments suggested that the relative amount of some chZFp isoforms increases at critical stages of development and skin morphogenesis. Finally, the main chZFp isoforms are able to directly interact in vitro with the scaffold attachment factor-A (SAF-A, also known as heterogenous nuclear ribonucleoprotein U) through both their aminoterminal and carboxyterminal domains. (C) 2005 Elsevier SAS. All rights reserved.
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