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Mendeliome v2.0 SUPT4H1 Gene migrated from ENSG00000213246 to ENSG00000213246 (gene set migration)
Mendeliome v1.4870 SUPT4H1 Chirag Patel Classified gene: SUPT4H1 as Green List (high evidence)
Mendeliome v1.4870 SUPT4H1 Chirag Patel Gene: supt4h1 has been classified as Green List (High Evidence).
Mendeliome v1.4869 SUPT4H1 Chirag Patel Marked gene: SUPT4H1 as ready
Mendeliome v1.4869 SUPT4H1 Chirag Patel Gene: supt4h1 has been classified as Red List (Low Evidence).
Mendeliome v1.4818 SUPT4H1 Sarah Milton gene: SUPT4H1 was added
gene: SUPT4H1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SUPT4H1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: SUPT4H1 were set to 41842694
Phenotypes for gene: SUPT4H1 were set to Syndromic disease, MONDO:0002254, SUPT4H1-related
Review for gene: SUPT4H1 was set to GREEN
Added comment: SUPT4H1 encodes SPT4 which is a subunit of the DSIF complex that regulates RNA polymerase II transcription.

PMID 41842694 reports six individuals from three unrelated families with biallelic loss‑of‑function SUPT4H1 variants. 2 families were consanguineous, the other was not noted to have been.

Clinical presentations of affected individuals included moderate to severe intellectual disability, dystonia, speech impairment, dysmorphism, skeletal anomalies including vertebral fusion/bifid vertebrae and complete enamel hypoplasia in 6/6 individuals.
Variable additional features included epilepsy, spasticity and congenital heart defects.

Variants were homozygous with one extension and 2 missense variants. Loss of function presumed mechanism.

Supportive functional studies included altered transcriptomics and proteomics of other genes/proteins across patient samples. C. elegans knockout and variant knock‑in models demonstrated altered movement and behaviour.
Sources: Literature