ClinGen Dosage Sensitivity Curation Page

IDS

  • Curation Status: Complete

Location Information

Select assembly: (NC_000023.10) (NC_000023.11)

Haploinsufficiency phenotype comments:

Loss of function mutations in IDS cause Mucopolysaccharidosis type II (Hunter syndrome), including frameshift, nonsense, splicing, and deletion mutations. 9% of all mutations are deletions involving one or more exons. Males are always affected. Female carriers are usually asymptomatic but there have been rare reports of symptomatic females due to skewed X-inactivation. See Gene Reviews.

The loss-of-function and triplosensitivity ratings for genes on the X chromosome are made in the context of a male genome to account for the effects of hemizygous duplications or nullizygous deletions. In contrast, disruption of some genes on the X chromosome causes male lethality and the ratings of dosage sensitivity instead take into account the phenotype in female individuals. Factors that may affect the severity of phenotypes associated with X-linked disorders include the presence of variable copies of the X chromosome (i.e. 47,XXY or 45,X) and skewed X-inactivation in females.

  • Triplosensitivity score: 0
  • Strength of Evidence (disclaimer): No evidence for dosage pathogenicity

The loss-of-function and triplosensitivity ratings for genes on the X chromosome are made in the context of a male genome to account for the effects of hemizygous duplications or nullizygous deletions. In contrast, disruption of some genes on the X chromosome causes male lethality and the ratings of dosage sensitivity instead take into account the phenotype in female individuals. Factors that may affect the severity of phenotypes associated with X-linked disorders include the presence of variable copies of the X chromosome (i.e. 47,XXY or 45,X) and skewed X-inactivation in females.