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Genomic newborn screening: BabyScreen+ v0.1883 PRDX1 Lilian Downie gene: PRDX1 was added
gene: PRDX1 was added to gNBS. Sources: Expert list
Mode of inheritance for gene: PRDX1 was set to Other
Publications for gene: PRDX1 were set to PMID: 20301503, PMID: 29396438, PMID: 34215320, PMID: 33982424
Phenotypes for gene: PRDX1 were set to Methylmalonic aciduria and homocystinuria, cblC type, digenic MIM#277400
Review for gene: PRDX1 was set to GREEN
Added comment: Digenic inheritance with mutation in other allele of MMACHC
On GUARDIAN and Rx genes list

Recently, three individuals who are double heterozygous for pathogenic variants in MMACHC and PRDX1 have been identified. PRDX1 is a neighboring gene on chromosome 1 transcribed from the reverse strand. Variants identified in PRDX1 located at the intron 5 splice acceptor site caused skipping of exon 6, transcription of antisense MMACHC, and hypermethylation of the MMACHC promoter/exon 1, resulting in no gene expression from that allele [Guéant et al 2018].

Treatable with cobalamin, carnitine & diet. NB MMACHC is green on our list, on newborn screening.
Sources: Expert list
Genomic newborn screening: BabyScreen+ v0.1710 MMACHC Zornitza Stark Tag metabolic tag was added to gene: MMACHC.
Genomic newborn screening: BabyScreen+ v0.268 MMACHC Zornitza Stark Marked gene: MMACHC as ready
Genomic newborn screening: BabyScreen+ v0.268 MMACHC Zornitza Stark Gene: mmachc has been classified as Green List (High Evidence).
Genomic newborn screening: BabyScreen+ v0.268 MMACHC Zornitza Stark Tag treatable tag was added to gene: MMACHC.
Genomic newborn screening: BabyScreen+ v0.268 MMACHC Zornitza Stark reviewed gene: MMACHC: Rating: GREEN; Mode of pathogenicity: None; Publications: ; Phenotypes: Methylmalonic aciduria and homocystinuria, cblC type MIM#277400; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Genomic newborn screening: BabyScreen+ v0.199 MMACHC John Christodoulou reviewed gene: MMACHC: Rating: GREEN; Mode of pathogenicity: None; Publications: ; Phenotypes: ; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Genomic newborn screening: BabyScreen+ v0.0 MMACHC Zornitza Stark gene: MMACHC was added
gene: MMACHC was added to gNBS. Sources: BeginNGS,BabySeq Category A gene,Expert Review Green
Mode of inheritance for gene: MMACHC was set to BIALLELIC, autosomal or pseudoautosomal
Phenotypes for gene: MMACHC were set to Methylmalonic aciduria and homocystinuria, cblC type, MIM#277400