A basic transthyretin variant (Glu61-->Lys) causes familial amyloidotic polyneuropathy: protein and DNA sequencing and PCR-induced mutation restriction analysis.
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Shiomi K, Nakazato M, Matsukura S, Ohnishi A, Hatanaka H, Tsuji S, Murai Y, Kojima M, Kangawa K, Matsuo H
A basic transthyretin variant (Glu61-->Lys) causes familial amyloidotic polyneuropathy: protein and DNA sequencing and PCR-induced mutation restriction analysis.
Biochem Biophys Res Commun. 1993 Aug 16;194(3):1090-6.
- PubMed ID
- 8352764 [ View in PubMed]
- Abstract
A new mutation of transthyretin (TTR) has been identified in a patient with late-onset familial amyloidotic polyneuropathy (FAP) of Japanese origin. Peptide mapping by reverse-phase high performance liquid chromatography to compare the patient's TTR with normal TTR showed the presence of an abnormal peptide. Amino acid sequence analysis of the peptide (residues 49-61) showed a lysine-for-glutamic acid substitution at position 61. This substitution, verified by direct DNA sequencing, was the result of a guanine to adenine change on exon 3 of the TTR gene. A polymerase chain reaction-induced mutation restriction analysis (PCR-IMRA) system was established to rapidly detect the missense mutation. TTR-Lys61 is the first variant TTR with a replacement of the acidic with basic amino acid to be found in the amyloid precursor proteins of FAP.