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- Title
Signal sequence and DNA-mediated expression of human lysosomal alpha-galactosidase A.
- Authors
Tsuji, S; Martin, B M; Kaslow, D C; Migeon, B R; Choudary, P V; Stubbleflied, B K; Mayor, J A; Murray, G J; Barranger, J A; Ginns, E I
- Abstract
Twelve complementary DNA clones for human lysosomal alpha-galactosidase A were isolated from an Okayama-Berg library constructed from SV40-transformed human fibroblasts. The identity of these clones was confirmed by complete colinearity of the nucleotide-deduced amino acid sequence with that determined by direct chemical sequencing of human placental alpha-galactosidase A. Hybridization of the alpha-galactosidase A cDNA to genomic DNA from individuals with varying numbers of X chromosomes as well as from interspecies somatic-cell hybrids showed only a single locus in the genome at Xq 13.1-Xq 22. One cDNA clone (pcD-AG210) contained the complete coding sequence for both the signal peptide and mature alpha-galactosidase A. The signal peptide of 31 amino acids contains the expected hydrophobic domains consisting of Leu-Gly-Cys-Ala-Leu-Ala-Leu and Phe-Leu-Ala-Leu-Val and has Ala at the signal peptidase cleavage site. Twelve out of fifteen G residues flanking the 5' end of the cDNA in pcD-AG210 were removed and the truncated fragment was ligated into the original vector. This construct, pcD-AG502, encoded enzymatically active human alpha-galactosidase A in monkey COS cells.
- Publication
European journal of biochemistry, 1987, Vol 165, Issue 2, p275
- ISSN
0014-2956
- Publication type
Journal Article
- DOI
10.1111/j.1432-1033.1987.tb11438.x