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Congenital disorders of glycosylation v7.11 A4GALT Achchuthan Shanmugasundram Classified gene: A4GALT as No list
Congenital disorders of glycosylation v7.11 A4GALT Achchuthan Shanmugasundram Gene: a4galt has been removed from the panel.
Congenital disorders of glycosylation v7.10 A4GALT Achchuthan Shanmugasundram Tag curated_removed tag was added to gene: A4GALT.
Congenital disorders of glycosylation v7.10 A4GALT Achchuthan Shanmugasundram Phenotypes for gene: A4GALT were changed from congenital disorder of glycosylation, MONDO:0015286 to [Blood group, P1Pk system, p phenotype], OMIM:111400
Congenital disorders of glycosylation v7.9 A4GALT Achchuthan Shanmugasundram Publications for gene: A4GALT were set to 12823750,15142124; 10747952; 10993874; 11896312; 27612185
Congenital disorders of glycosylation v7.8 A4GALT Ida Ertmanska edited their review of gene: A4GALT: Changed phenotypes to: [Blood group, P1Pk system, p phenotype], OMIM:111400
Congenital disorders of glycosylation v7.8 A4GALT Ida Ertmanska changed review comment from: LoF variants in this gene lead to a rare 'P-Null' blood type (absence of P and Pk blood group antigens). The phenotype is usually spontaneous abortions and significant haemolytic complications upon transfusion of incompatible blood (PMID: 27612185 Li et al., 2017). While the mechanism is indeed a Congenital disorders of glycosylation (impaired Gb3/CD77 synthase activity), this phenotype does not fit into the scope of the panel.; to: LoF variants in this gene lead to a rare 'P-Null' blood type (absence of P and Pk blood group antigens). The phenotype is usually spontaneous abortions and significant haemolytic complications upon transfusion of incompatible blood (PMID: 27612185 Li et al., 2017). While the mechanism is indeed a Congenital disorders of glycosylation (impaired Gb3/CD77 synthase activity), testing for a rare blood group antigen does not fit into the scope of the panel.
Congenital disorders of glycosylation v7.8 A4GALT Ida Ertmanska edited their review of gene: A4GALT: Changed publications to: 27612185; Changed phenotypes to: [Blood group, P1PK system, P(k) phenotype], OMIM:111400; Changed mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Congenital disorders of glycosylation v7.8 A4GALT Ida Ertmanska commented on gene: A4GALT
Congenital disorders of glycosylation v7.8 A4GALT Ida Ertmanska Deleted their review
Congenital disorders of glycosylation v7.8 A4GALT Ida Ertmanska changed review comment from: LoF variants in this gene lead to a rare 'P-Null' blood type (absence of P and Pk blood group antigens). The phenotype is usually spontaneous abortions and significant haemolytic complications upon transfusion of incompatible blood (PMID: 27612185 Li et al., 2017). While the mechanism is indeed a Congenital disorders of glycosylation (impaired Gb3/CD77 synthase activity), this phenotype does not fit into the scope of the panel. Hence, A4GALT should be rated Red for Congenital disorders of glycosylation.; to: LoF variants in this gene lead to a rare 'P-Null' blood type (absence of P and Pk blood group antigens). The phenotype is usually spontaneous abortions and significant haemolytic complications upon transfusion of incompatible blood (PMID: 27612185 Li et al., 2017). While the mechanism is indeed a Congenital disorders of glycosylation (impaired Gb3/CD77 synthase activity), this phenotype does not fit into the scope of the panel.
Congenital disorders of glycosylation v7.8 A4GALT Ida Ertmanska reviewed gene: A4GALT: Rating: RED; Mode of pathogenicity: None; Publications: 27612185; Phenotypes: [Blood group, P1Pk system, p phenotype], OMIM:111400; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Congenital disorders of glycosylation v7.8 A4GALT Ida Ertmanska Deleted their review
Congenital disorders of glycosylation v7.8 A4GALT Ida Ertmanska edited their review of gene: A4GALT: Changed publications to: 12823750, 15142124, 10747952, 10993874, 11896312, 27612185
Congenital disorders of glycosylation v7.8 A4GALT Ida Ertmanska gene: A4GALT was added
gene: A4GALT was added to Congenital disorders of glycosylation. Sources: ClinGen
Mode of inheritance for gene: A4GALT was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: A4GALT were set to 12823750,15142124; 10747952; 10993874; 11896312; 27612185
Phenotypes for gene: A4GALT were set to congenital disorder of glycosylation, MONDO:0015286
Review for gene: A4GALT was set to GREEN
Added comment: A4GALT was first reported in relation to autosomal recessive congenital disorder of glycosylation in 2000 (Steffensen et al., PMID: 10747952). A4GALT-congenital disorder of glycosylation presents as the blood group phenotype p null. Persons affected with this condition may present with no phenotype beyond abnormal agglutination in standard blood group serological testing or may present with recurrent spontaneous abortion or congenital hemolytic anemia.
14 variants (missense, in-frame indel, nonsense, frameshift) that have been reported in 13 probands in 6 publications (PMIDs: 12823750, 15142124, 10747952, 10993874, 11896312, 27612185) are included in this curation. The mechanism of pathogenicity is known to be loss of function. This gene-disease relationship is also supported by in vitro functional assays. (PMIDs: 23927681, 18067504).
The gene-disease relationship is classified as Definitive in ClinGen (May 2025).
Sources: ClinGen