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  3. SMG8
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Fetal anomalies

Gene: SMG8

Green List (high evidence)
SMG8 (SMG8, nonsense mediated mRNA decay factor)
EnsemblGeneIds (GRCh38): ENSG00000167447
EnsemblGeneIds (GRCh37): ENSG00000167447
OMIM: 613175, Gene2Phenotype
SMG8 is in 6 panels

2 reviews

Arina Puzriakova (Genomics England Curator)

Green List (high evidence)

The rating of this gene has been updated to Green and the mode of inheritance set to BIALLELIC, autosomal or pseudoautosomal following NHS Genomic Medicine Service approval.
Created: 10 Mar 2026, 12:27 p.m. | Last Modified: 10 Mar 2026, 12:27 p.m.
Panel Version: 6.149
This gene and phenotype were reviewed during meetings between November 2025 & January 2026. The meetings included representatives of the Central & South and North Thames R21 testing GLHs and from the R21 Clinical Oversight Group. Clinical review and curation was performed by Stephanie Allen, Elizabeth Young and Sarah Graham (Central & South GLH), Natalie Chandler and Elizabeth Scotchman (North Thames GLH), and Tazeen Ashraf, Anna De Burca, Natalie Canham, Samantha Doyle, Alice Gardham, Victoria Harrison, Tessa Homfray, Esther Kinning, and Soo-Mi Park (R21 Clinical Oversight Group).
Created: 10 Mar 2026, 11:35 a.m. | Last Modified: 10 Mar 2026, 11:35 a.m.
Panel Version: 6.148
Created: 10 Mar 2026, 11:35 a.m.
Last Modified: 10 Mar 2026, 11:35 a.m.
Panel version: 6.150

Samantha Doyle (The National Maternity Hospital)

Green List (high evidence)

pmid 33242396- 2020 paper- presents with congenital cataracts, hCongenital heart disease and brain anomalies including white matter abnormalities. This paper presents 9 people from 4 families. ( Clinical features include GDD/ID (8/8), dysmorphic features (9/9) microcephaly (6/9), short stature (4/9), brain imaging anomalies (4/5), congenital heart disease (3/9) and cataract (3/8). Microcephaly in 3/4 families). PMID: 31130284- 2 individuals presetning with microcephaly, ID, cataract, and neck hyperpigmentation; while the other presented short stature, microcephaly, fine motor delay, ventricular septal defect, failure to thrive, and facial dysmorphism.
Created: 10 Mar 2026, 11:27 a.m. | Last Modified: 10 Mar 2026, 11:27 a.m.
Panel Version: 6.147

Mode of inheritance
BIALLELIC, autosomal or pseudoautosomal

Phenotypes
Alzahrani-Kuwahara syndrome, OMIM:619268

Publications

Created: 10 Mar 2026, 11:27 a.m.
Last Modified: 10 Mar 2026, 11:27 a.m.
Panel version: 6.147

Details

Mode of Inheritance
BIALLELIC, autosomal or pseudoautosomal
Sources
  • Expert Review Green
Phenotypes
  • Alzahrani-Kuwahara syndrome, OMIM:619268
OMIM
613175
Clinvar variants
Variants in SMG8
Penetrance
None
Panels with this gene

History Filter Activity

10 Mar 2026, Gel status: 3

Set Phenotypes

Arina Puzriakova (Genomics England Curator)

Added phenotypes Alzahrani-Kuwahara syndrome, OMIM:619268 for gene: SMG8

9 Mar 2026, Gel status: 3

Created, Added New Source, Set mode of inheritance

Arina Puzriakova (Genomics England Curator)

gene: SMG8 was added gene: SMG8 was added to Fetal anomalies. Sources: Expert Review Green Mode of inheritance for gene: SMG8 was set to BIALLELIC, autosomal or pseudoautosomal