Abstract：
:Hereditary glutathione reductase (GR) deficiency was found in only 2 cases when testing more than 15 000 blood samples. We have investigated the blood cells of 2 patients (1a and 1b) in a previously described family suffering from favism and cataract and of a novel patient (2) presenting with severe neonatal jaundice. Red blood cells and leukocytes of the patients in family 1 did not contain any GR activity, and the GR protein was undetectable by Western blotting. Owing to a 2246-bp deletion in the patients' DNA, translated GR is expected to lack almost the complete dimerization domain, which results in unstable and inactive enzyme. The red blood cells from patient 2 did not exhibit GR activity either, but the patient's leukocytes contained some residual activity that correlated with a weak protein expression. Patient 2 was found to be a compound heterozygote, with a premature stop codon on one allele and a substitution of glycine 330, a highly conserved residue in the superfamily of NAD(P)H-dependent disulfide reductases, into alanine on the other allele. Studies on recombinant GR G330A revealed a drastically impaired thermostability of the protein. This is the first identification of mutations in the GR gene causing clinical GR deficiency.
journal_name
Bloodjournal_title
Bloodauthors
Kamerbeek NM,van Zwieten R,de Boer M,Morren G,Vuil H,Bannink N,Lincke C,Dolman KM,Becker K,Schirmer RH,Gromer S,Roos Ddoi
10.1182/blood-2006-08-042531subject
Has Abstractpub_date
2007-04-15 00:00:00pages
3560-6issue
8eissn
0006-4971issn
1528-0020pii
blood-2006-08-042531journal_volume
109pub_type
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