N-terminal acetylation of proteins is a widespread and highly conserved process. Aminoacylase 1 (ACY1; EC 3.5.14) is the most abundant of the aminoacylases, a class of enzymes involved in hydrolysis of N-acetylated proteins.
In a paper published online on January 18, 2006, in the American Journal of Human Molecular Genetics, Sass et al. present four children with genetic deficiency of ACY1. Mutation analysis uncovered recessive loss-of-function or missense ACY1 mutations in all four individuals affected. The authors conclude that ACY1 mutations in these children led to functional ACY1 deficiency and excretion of N-acetylated amino acids. The clinical significance of ACY1 deficiency is discussed in the light of the awareness of this new genetic entity.
Jörn Oliver Sass
Department of General Pediatrics and Adolescent Medicine, University Children's Hospital Freiburg, Freiburg, Germany.
Department of Pediatric Neurology and Muscle Disease, University Children's Hospital Freiburg, Freiburg, Germany.
Abstract available online.
(C) American Journal of Human Molecular Genetics.
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