Shimamoto T, Kohno K, Tanaka K, Okada Y
Institute for Molecular and Cellular Biology, Osaka University, Japan.
Biochem Biophys Res Commun. 1991 Dec 31;181(3):1231-7. doi: 10.1016/0006-291x(91)92070-z.
We cloned homologs of the human Xeroderma Pigmentosum Group A complementing (XPAC) gene from chicken, Xenopus laevis and Drosophila melanogaster. A comparison of the amino acid sequences of these homologs with that of the human XPAC protein revealed that in the NH2-terminal domain there are only two conserved regions, one of which is presumed to function as the nuclear localization signal, whereas the COOH-terminal domain is highly conserved, the frequency of identical amino acids in all four XPAC proteins being 50%, and the four cysteine residues predicted to form a zinc-finger motif, and three other cysteine residues are all conserved. These results strongly suggest that the COOH-terminal domain containing a zinc-finger motif plays an important role in the function of these proteins.
