Molecular cloning and chromosomal localization of the human CITED2 gene encoding p35srj/Mrg1

P35srj is a ubiquitously expressed nuclear protein that binds the transcrip tional coactivators p300 and CREB-binding protein (CBP), It is an alternati vely spliced isoform of Mrg1, a cytokine-inducible factor that has transfor mation activity, P35srj interferes with the recruitment of p300/CBP by the transcription factor HIF-1 alpha, a process that is essential for the trans criptional response to hypoxia. Here we report the cloning of the human gen e CITED2, which encodes p35srj and Mrg1, The CITED2 gene is composed of thr ee exons and two introns, An unusually large (3 kb) CpG island covers both the promoter and the transcribed portions of the gene. The 5'-flanking regi on of the gene is active as a promoter in transient transfection assays and contains multiple STAT-binding sites, in keeping with its responsiveness t o different cytokines, Fluorescence in situ hybridization, and identity to a known human sequence-tagged site (D6S2114), was used to map the CITED2 ge ne to chromosome 6q23.3, (C) 1999 Academic Press.