Clin Chim Acta. 1998 Jun 22;274(2):159-66.

Identification of a point mutation associated with a silent phenotype of human serum butyrylcholinesterase--a case of familial cholinesterasemia.

Sakamoto N, Hidaka K, Fujisawa T, Maeda M, Iuchi I.

Source

Department of Internal Medicine, Ishikawajima-harima Heavy Industries Harima Hospital, Health Insurance Society, Asahi, Aioi, Japan.

Abstract

A point mutation which caused a silent phenotype of human serum butyrylcholinesterase (BChE) was identified in the DNA of a 47-year-old Japanese woman who visited our hospital complaining of hypertension. The propositus exhibited an unusually low level of BChE activity, whereas her younger sister and her daughter had intermediate levels of BChE activity and her elder sister a normal level. Immunologically, the amount of BChE protein in the serum of the propositus was normal. DNA sequence analysis of the propositus identified a point mutation at codon 199 (GCA --> GTA), resulting in a Ala --> Val substitution. This alteration is one downstream codon from the catalytic active site (Ser, 198). A family study showed her younger sister and her daughter to have the same mutation.

PMID:: 9694584; [PubMed - indexed for MEDLINE]

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Butyrylcholinesterase

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Identification of a point mutation associated with a silent phenotype of human serum butyrylcholinesterase--a case of familial cholinesterasemia.
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