Debt91, a putative zinc finger protein differentially expressed during epithelial morphogenesis.

In a differential screen for genes that might be important in the regulation of epithelial morphogenesis, we identified a novel gene, Debt91 (differentially expressed in branching tubulogenesis), which is up-regulated in an in vitro model of renal tubulogenesis and branching. Debt91 appears to encode a 381 amino acid molecule with high Ser and Thr composition and is highly conserved at its N-terminus across species. Sequence analysis suggests that it is a coiled-coil nuclear phosphoprotein with zinc finger motifs at the N-terminal conserved region, which is rich in cysteine and histidine. Debt91 is located on mouse chromosome 6 at a region that has conserved synteny with human chromosome 2p11.2, and appears to express two transcripts in several mouse cell lines and adult tissues. On whole murine embryo blots Debt91 expresses primarily its small transcript and is differentially regulated during development. Analysis of expression in in vitro cell culture models suggests that Debt91 is an immediate early gene up-regulated during growth factor-induced branching tubulogenesis.

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