The multiple sulfatase deficiency gene encodes an essential and limiting factor for the activity of sulfatases.
In multiple sulfatase deficiency (MSD), a human inherited disorder, the activities of all sulfatases are impaired due to a defect in posttranslational modification. Here we report the identification, by functional complementation using microcell-mediated chromosome transfer, of a gene that is mutated in MSD and is able to rescue the enzymatic deficiency in patients' cell lines. Functional conservation of this gene was observed among distantly related species, suggesting a critical biological role. Coexpression of SUMF1 with sulfatases results in a strikingly synergistic increase of enzymatic activity, indicating that SUMF1 is both an essential and a limiting factor for sulfatases. These data have profound implications on the feasibility of enzyme replacement therapy for eight distinct inborn errors of metabolism.
Cosma
Maria Pia
MP
Telethon Institute of Genetics and Medicine (TIGEM), Naples, Italy.
Pepe
Stefano
S
Annunziata
Ida
I
Newbold
Robert F
RF
Grompe
Markus
M
Parenti
Giancarlo
G
Ballabio
Andrea
A
D000818:Animals; D019556:COS Cells; D002893:Chromosomes, Human, Pair 3 / Q000235:genetics; D018076:DNA, Complementary / Q000032:analysis / Q000235:genetics; D019143:Evolution, Molecular; D015971:Gene Expression Regulation, Enzymologic / Q000235:genetics*; D006801:Humans; D051379:Mice; D008969:Molecular Sequence Data; D009154:Mutation / Q000235:genetics*; D017434:Protein Structure, Tertiary / Q000235:genetics; D017386:Sequence Homology, Amino Acid; D012689:Sequence Homology, Nucleic Acid; D013106:Sphingolipidoses / Q000201:enzymology* / Q000235:genetics*; D013429:Sulfatases / Q000172:deficiency* / Q000235:genetics*
D018076:DNA, Complementary; D013429:Sulfatases