A single-base mutation in exon 31 converting glycine 852 to arginine in the collagenous domain in an Alport syndrome patient.
In a family with Alport syndrome, molecular analysis of the COL4A5 gene, which encodes the alpha 5(IV) chain of glomerular basement membrane collagen, revealed a GGA-->AGA change in exon 31, resulting in substitution of an arginine for a glycine in position 852 of the polypeptide chain, between interruptions 16 and 17 of the triple-helical collagenous domain. The mutation causes the MaeI restriction sites, and could be easily diagnosed in the family members through restriction analysis. This one point mutation can be expected to interrupt type IV collagen molecules.
Department of Medicine, Kyoritsu Hospital, Hiroshima, Japan.
S
S
Kawai
S
S
Nomura
T
T
Harano
K
K
Harano
T
T
Fukushima
M
M
Wago
B
B
Shimizu
G
G
Osawa
D000328:Adult; D000595:Amino Acid Sequence; D001120:Arginine; D001483:Base Sequence; D001485:Basement Membrane / Q000378:metabolism; D002648:Child; D003094:Collagen / Q000737:chemistry / Q000235:genetics*; D017931:DNA Primers; D015252:Deoxyribonucleases, Type II Site-Specific; D005091:Exons; D005260:Female; D005998:Glycine; D006801:Humans; D007678:Kidney Glomerulus / Q000378:metabolism; D008297:Male; D009394:Nephritis, Hereditary / Q000235:genetics*; D010375:Pedigree; D017354:Point Mutation; D016133:Polymerase Chain Reaction; D018807:Polymorphism, Single-Stranded Conformational; D017433:Protein Structure, Secondary
D017931:DNA Primers; D003094:Collagen; D001120:Arginine; C040836:CTAG-specific type II deoxyribonucleases; D015252:Deoxyribonucleases, Type II Site-Specific; D005998:Glycine