Research Summary: A Novel SERPINA1 Mutation Causing Serum Alpha1-Antitrypsin Deficiency

ABSTRACT

Mutations in the SERPINA1 gene can cause deficiency in the circulating serine protease inhibitor α1-Antitrypsin (α1AT). α1AT deficiency is the major contributor to pulmonary emphysema and liver disease in persons of European ancestry, with a prevalence of 1 in 2500 in the USA. We present the discovery and characterization of a novel SERPINA1 mutant from an asymptomatic Middle Eastern male with circulating α1AT deficiency. This 49 base pair deletion mutation (T379Δ), originally mistyped by IEF, causes a frame-shift replacement of the last sixteen α1AT residues and adds an extra twenty-four residues. Functional analysis showed that the mutant protein is not secreted and prone to intracellular aggregation.

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Publisher: Public Library of Science

Date Published: 12-December-2012

Author(s): Saunders D., Tindall E., Shearer R., Roberson J., Decker A., Wilson J., Hayes V.

Link: https://doi.org/10.1371/journal.pone.0051762

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