Abstract
We report the genomic organization, RNA and protein expression patterns of the gene encoding for the human homolog of the yeast ubiquitin fusion-degradation protein-1 (UFD1L). This enzyme is involved in a ubiquitin-dependent proteolytic pathway (UFD), firstly described in yeast. The human UFD1L gene is organized into 12 exons ranging in size from 33 to 161 bp. Sequence analysis of the 5'-flanking region of the gene revealed a high GC content, multiple CCAAT-binding motifs, CREB, CFT, and AP-2 sites. RNA transcripts were detected in all tissues and cell lines examined, including thymus, thymocytes, T- and B-cells, fibroblasts, chorionic villi, and amniocytes. In Western blot, the UFD1L antibody demonstrated the presence of multiple protein isoforms in all the tested tissues. Expression profile and promoter characteristics suggest UFD1L is a housekeeping gene with implications in the pathogenesis of DiGeorge/velo-cardio-facial syndrome, due to 22q11.2 deletions.
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