White matter disorders and cerebral calcification - narrow panel
Gene: DCAF17
The rating of this gene has been updated to Green following NHS Genomic Medicine Service approval.Created: 30 Jan 2023, 4:26 p.m. | Last Modified: 30 Jan 2023, 4:26 p.m.
Panel Version: 2.9
Comment on list classification: Promoting this gene from grey to amber, but with a recommendation for green rating following GMS review. >3 cases of variants in DCAF17 in patients with Woodhouse-Sakati syndrome and white matter lesions observed in approx 70% of patients.Created: 27 Apr 2021, 3:43 p.m. | Last Modified: 27 Apr 2021, 3:43 p.m.
Panel Version: 1.45
Associated with Woodhouse-Sakati syndrome in OMIM (#241080 (AR))
DCAF17 is also known as C2ORF37
PMID: 19026396 - Alazami et al 2008 - report single bp deletion in C2orf37 in 8 families of Saudi origin (identified as a founder mutation). Patients phenotypes included hypogonadism, alopecia, diabetes mellitus, mental retardation, and extrapyramidal syndrome (Woodhouse-Sakati syndrome). 3 other variants were then found in patients of different ethnicities (another 1 bp deletion leading to a frameshift and 2 variants affecting splice donor sites). The variants segregated with the disease in all families. The two 1 bp changes are predicted to affect the beta isoform only.
PMID: 20507343 - Alazami et al 2010 - report 7 new patients from 4 families (3 ethnic backgrounds, Italian, French Gypsy and Turkish) who present with Woodhouse-Sakati syndrome. Each family had a different variant in C2orf37 - 3 nonsense mutations and a splice site ablation.
PMID: 30409855 - Abusrair et al 2018 - reviewed brain MR images of 26 patients with a clinical and genetic diagnosis of Woodhouse-Sakati syndrome. All participants had confirmed homozygous pathogenic variants in DCAF17. White matter lesions were observed in 18 patients (69.2%).
PMID: 31726291 - Bohlega et al 2019 - report on 38 individuals from 17 families were identified as having a clinically and genetically confirmed diagnosis of WSS. All patients shared the same founder DCAF17: NM_001164821:exon4: c.436delC:p.L146fs frameshift deletion. Two groups identified based on phenotype. The age of onset of neurological symptoms for the group with the more severe phenotype was 12.6 ± 4.5 years (range, 9–17 years).Created: 27 Apr 2021, 3:39 p.m. | Last Modified: 27 Apr 2021, 4:11 p.m.
Panel Version: 1.45
Mode of inheritance
BIALLELIC, autosomal or pseudoautosomal
Phenotypes
Woodhouse-Sakati syndrome OMIM:241080
Publications
White matter changes are part of the phenotype.
Sources: Expert listCreated: 15 Sep 2020, 10:08 a.m.
Mode of inheritance
BIALLELIC, autosomal or pseudoautosomal
Phenotypes
Woodhouse-Sakati syndrome, MIM# 241080
Publications
Variants in this GENE are reported as part of current diagnostic practice
Tag Q2_21_rating was removed from gene: DCAF17.
Source NHS GMS was added to DCAF17. Source Expert Review Green was added to DCAF17. Rating Changed from Amber List (moderate evidence) to Green List (high evidence)
Phenotypes for gene: DCAF17 were changed from Woodhouse-Sakati syndrome, MIM# 241080 to Woodhouse-Sakati syndrome, OMIM:241080
Publications for gene: DCAF17 were set to 19026396; 20507343
Gene: dcaf17 has been classified as Amber List (Moderate Evidence).
Tag Q2_21_rating tag was added to gene: DCAF17.
gene: DCAF17 was added gene: DCAF17 was added to White matter disorders and cerebral calcification - narrow panel. Sources: Expert list Mode of inheritance for gene: DCAF17 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: DCAF17 were set to 19026396; 20507343 Phenotypes for gene: DCAF17 were set to Woodhouse-Sakati syndrome, MIM# 241080 Review for gene: DCAF17 was set to GREEN gene: DCAF17 was marked as current diagnostic