| |
|
|
|
|
|
|
|||
|
H Fujii, H Kanno, A Hirono, T Shiomura and S Miwa
Department of Blood Transfusion Medicine, Tokyo Women's Medical College,
Japan.
We have determined a single amino acid substitution in a new
phosphoglycerate kinase (PGK) variant, PGK Shizuoka, associated with
chronic hemolysis and myoglobinuria. PGK Shizuoka had an extremely low
enzyme activity with normal kinetic properties and normal electrophoretic
mobility. Total blood cell RNA of the patient was reverse-transcribed and
amplified by the polymerase chain reaction. A single nucleotide
substitution from guanine to thymine at position 473 of PGK messenger RNA
was found. This nucleotide change causes a single amino acid substitution
from Gly to Val at the 157th position, which is located in the NH2-terminal
domain of the enzyme. This mutation creates a new Bst XI cleavage site in
exon 5, and we thus confirmed the mutation in the variant gene. The
replacement of Gly by Val is considered to affect enzyme catalysis.
This article has been cited by other articles:
| |||||||||||
| Copyright © 1992 by American Society of Hematology Online ISSN: 1528-0020 | |||||||||