Abstract
The WWE domain is a conserved globular domain in several proteins and predicted to mediate specificprotein-protein interactions in ubiquitin and ADP ribose conjugation systems. The RING domain is a conserved and specialized zinc-finger motif with 40-60 residues binding to two zinc atoms, which is also probably involved in mediating protein-protein interactions. Here, from human fetal heart cDNA library, we identified DTX2, a human WWE & RING-finger gene, with high similarity with its homologues. Evaluation of full-length cDNA obtained by RACE indicated it encodes a protein composed of two WWE domains and a RING-finger region. The DTX2 gene located in human chromosome 7q11.23 spanning approximately 44.3 kb on the genome and the deduced protein is 622 amino acids. Northern analysis revealed DTX2 was expressed in the 18-week, 22.5-week human embryo hearts and adult hearts, especially with high levels in the 18-week and adult hearts. Taken together, these results indicate that DTX2 is a gene encoding a WWE-RING-finger protein and involved in regulating heart development and heart functions.
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