Biomaterial Database

Adenine phosphoribosyltransferase (APRT) deficiency: identification of a novel nonsense mutation. 2014

Rea Valaperta, and Vittoria Rizzo, and Fortunata Lombardi, and Chiara Verdelli, and Marco Piccoli, and Andrea Ghiroldi, and Pasquale Creo, and Alessio Colombo, and Massimiliano Valisi, and Elisabetta Margiotta, and Rossella Panella, and Elena Costa

Research Laboratories - Molecular Biology, IRCCS Policlinico San Donato, Piazza E, Malan 2, 20097, San Donato Milanese, Milan, Italy. rea.valaperta@grupposandonato.it.

BACKGROUND Adenine phosphoribosyltransferase deficiency (APRTD) is an under estimated genetic form of kidney stones and/or kidney failure, characterized by intratubular precipitation of 2,8-dihydroxyadenine crystals (2,8-DHA). Currently, five pathologic allelic variants have been identified as responsible of the complete inactivation of APRT protein. METHODS In this study, we report a novel nonsense mutation of the APRT gene from a 47- year old Italian patient. The mutation, localized in the exon 5, leads to the replacement of a cytosine with a thymine (g.2098C > T), introducing a stop codon at amino acid position 147 (p.Gln147X).This early termination was deleterious for the enzyme structural and functional integrity, as demonstrated by the structure analysis and the activity assay of the mutant APRT protein. CONCLUSIONS These data revealed that the p.Gln147X mutation in APRT gene might be a new cause of APRT disease.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D008661	Metabolism, Inborn Errors	Errors in metabolic processes resulting from inborn genetic mutations that are inherited or acquired in utero.	Inborn Errors of Metabolism,Metabolism Errors, Inborn,Error, Inborn Metabolism,Errors Metabolism, Inborn,Errors Metabolisms, Inborn,Errors, Inborn Metabolism,Inborn Errors Metabolism,Inborn Errors Metabolisms,Inborn Metabolism Error,Inborn Metabolism Errors,Metabolism Error, Inborn,Metabolism Inborn Error,Metabolism Inborn Errors,Metabolisms, Inborn Errors
D008875	Middle Aged	An adult aged 45 - 64 years.	Middle Age
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000228	Adenine Phosphoribosyltransferase	An enzyme catalyzing the formation of AMP from adenine and phosphoribosylpyrophosphate. It can act as a salvage enzyme for recycling of adenine into nucleic acids. EC 2.4.2.7.	AMP Pyrophosphorylase,Transphosphoribosidase,APRTase,Phosphoribosyltransferase, Adenine,Pyrophosphorylase, AMP
D017433	Protein Structure, Secondary	The level of protein structure in which regular hydrogen-bond interactions within contiguous stretches of polypeptide chain give rise to ALPHA-HELICES; BETA-STRANDS (which align to form BETA-SHEETS), or other types of coils. This is the first folding level of protein conformation.	Secondary Protein Structure,Protein Structures, Secondary,Secondary Protein Structures,Structure, Secondary Protein,Structures, Secondary Protein
D052878	Urolithiasis	Formation of stones in any part of the URINARY TRACT, usually in the KIDNEY; URINARY BLADDER; or the URETER.	Urinary Lithiasis,Lithiasis, Urinary
D018389	Codon, Nonsense	An amino acid-specifying codon that has been converted to a stop codon (CODON, TERMINATOR) by mutation. Its occurance is abnormal causing premature termination of protein translation and results in production of truncated and non-functional proteins. A nonsense mutation is one that converts an amino acid-specific codon to a stop codon.	Codon, Termination, Premature,Codon, Unassigned,Mutation, Nonsense,Nonsense Codon,Nonsense Mutation,Premature Stop Codon,Unassigned Codon,Amber Nonsense Codon,Amber Nonsense Mutation,Nonsense Codon, Amber,Ochre Nonsense Codon,Ochre Nonsense Mutation,Opal Nonsense Codon,Opal Nonsense Mutation,Premature Termination Codon,Amber Nonsense Codons,Amber Nonsense Mutations,Codon, Amber Nonsense,Codon, Ochre Nonsense,Codon, Opal Nonsense,Codon, Premature Stop,Codon, Premature Termination,Codons, Amber Nonsense,Codons, Nonsense,Codons, Ochre Nonsense,Codons, Opal Nonsense,Codons, Premature Stop,Codons, Premature Termination,Codons, Unassigned,Mutation, Amber Nonsense,Mutation, Ochre Nonsense,Mutation, Opal Nonsense,Mutations, Amber Nonsense,Mutations, Nonsense,Mutations, Ochre Nonsense,Mutations, Opal Nonsense,Nonsense Codon, Ochre,Nonsense Codon, Opal,Nonsense Codons,Nonsense Codons, Amber,Nonsense Codons, Ochre,Nonsense Codons, Opal,Nonsense Mutation, Amber,Nonsense Mutation, Ochre,Nonsense Mutation, Opal,Nonsense Mutations,Nonsense Mutations, Amber,Nonsense Mutations, Ochre,Nonsense Mutations, Opal,Ochre Nonsense Codons,Ochre Nonsense Mutations,Opal Nonsense Codons,Opal Nonsense Mutations,Premature Stop Codons,Premature Termination Codons,Stop Codon, Premature,Stop Codons, Premature,Termination Codon, Premature,Termination Codons, Premature,Unassigned Codons