Fucosyltransferase genes are dispersed in the genome: FUT7 is located on 9q34.3 distal to D9S1830.
Synthesis of A, B, H, Lewis and related histo-blood group antigens is catalyzed by different fucosyltransferases. Enzymatic acceptor specificity and tissue expression permit the definition of 2 types of alpha-2-fucosyltransferases and 5 types of alpha-3-fucosyltransferases encoded by specific genes registered as FUT1 to FUT7. We have previously assigned FUT4 to 11q21, the cluster FUT1-FUT2 to 19q13.3 and the cluster FUT6-FUT3-FUT5 to 19p13.3. The last gene cloned (FUT7) encodes an alpha-3-fucosyltransferase expressed in leukocytes which synthesizes the sialyl Lĕ antigen, a selectin ligand. We have localized this gene by PCR assay using somatic cell hybrids, which retain rearrangements of chromosome 9 characterized in respect with the genetic microsatellite map, and then by screening a cosmid library. We assign FUT7 to chromosome band 9q34.3 telomeric to D9S1830 and close to the genes ABC2 and C8G.
Reguigne-Arnould
I
I
Unité de recherche sur la différenciation cellulaire intestinale, INSERM U. 178, Villejuif, France.
Wolfe
J
J
Hornigold
N
N
Fauré
S
S
Mollicone
R
R
Oriol
R
R
Coullin
P
P
D002874:Chromosome Mapping; D002899:Chromosomes, Human, Pair 9; D005647:Fucosyltransferases / Q000235:genetics*; D015894:Genome, Human; D006801:Humans; D007962:Leukocytes / Q000201:enzymology; D018895:Microsatellite Repeats; D000097631:Galactoside 2-alpha-L-fucosyltransferase
D005647:Fucosyltransferases; D000097631:Galactoside 2-alpha-L-fucosyltransferase; C031692:galactoside 3-fucosyltransferase