Finnegan R, O'Regan M, White M, Cavalleri G, Delanty N, Benson K, Greally M. Similarity of Phenotype in Three Male Patients With the c.320A>G Variant in ALG13: Possible Genotype-Phenotype Correlation.
Mol Genet Genomic Med 2024;
12:e70010. [PMID:
39311797 PMCID:
PMC11418404 DOI:
10.1002/mgg3.70010]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2024] [Revised: 08/19/2024] [Accepted: 08/27/2024] [Indexed: 09/26/2024] Open
Abstract
BACKGROUND
Congenital disorders of glycosylation (CDG) are a group of neurometabolic diseases that result from genetic defects in the glycosylation of proteins and/or lipids. Multiple pathogenic genes contribute to the varying reported phenotypes of individuals with CDG-1 syndromes, most of which are inherited as autosomal recessive traits, although X-linked inheritance has also been reported. Pathogenic variants in the asparagine-linked glycosylation 13 homolog (ALG13) gene have been implicated in the aetiology of developmental and epileptic encephalopathy (DEE) 36 (OMIM:*300776, DEE36). The NM_001099922.3:c.320A>G; p.(Asn107Ser) variant is the most frequently described pathogenic variant in ALG13, with 59 females and 2 males with this variant reported to date.
METHODS
We report on a male with a de novo, hemizygous variant in ALG13: c.320A>G; p.(Asn107Ser), whose phenotype resembles that of two previously reported males with the same variant.
RESULTS
All three males have a de novo mutation, infantile spasms, DEE, drug-resistant epilepsy, intellectual disability, dysmorphic findings, recurrent infections, skeletal anomalies, brain abnormalities and a movement disorder: a phenotype not consistently reported in males with other pathogenic variants in ALG13.
CONCLUSION
The similarity of phenotype in the three males with the c.320A>G variant in ALG13, suggests a possible genotype-phenotype correlation.
Collapse