An inherited non-amyloidogenic transthyretin variant, [Ser6]-TTR, with increased thyroxine-binding affinity, characterized by DNA sequencing

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Abstract
Amplification and sequencing of the four transthyretin (TTR) exons of a subject with a variant TTR with four-fold increased affinity for thyroxine revealed a heterozygous G to A point mutation at base 7 of exon 2. This results in a serine for glycine change at residue 6 of the mature TTR monomer. No other mutations were found in any exon. Amplification and MspI digestion of TTR exon 2 from the leucocyte DNA of eight members of the subject's family revealed that all but one member were also heterozygous for [Ser6]-TTR. Journal of Endocrinology (1991) 129, 309–313

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