PMID- 10211701 OWN - NLM STAT- MEDLINE DCOM- 19990607 LR - 20191024 IS - 0282-0080 (Print) IS - 0282-0080 (Linking) VI - 15 IP - 10 DP - 1998 Oct TI - Significance of each of three missense mutations, G484A, G667A, and G808A, present in an inactive allele of the human Lewis gene (FUT3) for alpha(1,3/1,4)fucosyltransferase inactivation. PG - 961-7 AB - Recently, we found three novel missense mutations, G484A (Asp162Asn), G667A (Gly223Arg), and G808A (Val270Met), present in a Lewis-negative allele (le484,667,808) from an African (Xhosa) population. To define the relative contribution of each of the three mutations in the le484,667,808 allele for inactivation of the FUT3-encoded enzyme, we made chimeric FUT3 containing each of the three mutations. A transient expression study indicated that COS7 cells transfected with the FUT3 construct containing the G484A mutation expressed the Lewis antigen and had about 20% enzyme activity as compared with COS7 cells transfected with the wild type FUT3 allele, whereas COS7 cells transfected with the FUT3 construct containing either the G667A mutation or the G808A mutation did not express the Lewis antigen and showed no detectable alpha(1,3/1,4)fucosyltransferase activity. These results suggest that the G667A and/or the G808A missense mutations of FUT3 alleles are responsible for the inactivation of the FUT3-encoded enzyme. FAU - Pang, H AU - Pang H AD - Department of Forensic Medicine, Kurume University School of Medicine, Fukuoka, Japan. FAU - Koda, Y AU - Koda Y FAU - Soejima, M AU - Soejima M FAU - Kimura, H AU - Kimura H LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Glycoconj J JT - Glycoconjugate journal JID - 8603310 RN - 0 (DNA Primers) RN - 0 (Recombinant Fusion Proteins) RN - EC 2.4.1.- (Fucosyltransferases) RN - EC 2.4.1.65 (3-galactosyl-N-acetylglucosaminide 4-alpha-L-fucosyltransferase) SB - IM MH - *Alleles MH - Amino Acid Sequence MH - Animals MH - Base Sequence MH - COS Cells MH - DNA Primers MH - Fucosyltransferases/*antagonists & inhibitors/chemistry/*genetics MH - Humans MH - Molecular Sequence Data MH - *Mutation, Missense MH - Recombinant Fusion Proteins/genetics MH - Sequence Homology, Amino Acid EDAT- 1999/04/22 00:00 MHDA- 1999/04/22 00:01 CRDT- 1999/04/22 00:00 PHST- 1999/04/22 00:00 [pubmed] PHST- 1999/04/22 00:01 [medline] PHST- 1999/04/22 00:00 [entrez] AID - 10.1023/a:1006981724233 [doi] PST - ppublish SO - Glycoconj J. 1998 Oct;15(10):961-7. doi: 10.1023/a:1006981724233.