ClinVar Miner

Submissions for variant NM_000161.3(GCH1):c.272T>A (p.Leu91Gln)

Minimum review status: Collection method:
Minimum conflict level:
ClinVar version:
Total submissions: 1
Download table as spreadsheet
Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Labcorp Genetics (formerly Invitae), Labcorp RCV003027954 SCV003338296 likely pathogenic Dystonia 5; GTP cyclohydrolase I deficiency 2022-04-04 criteria provided, single submitter clinical testing This missense change has been observed in individual(s) with clinical features of dystonia (Invitae). In summary, the currently available evidence indicates that the variant is pathogenic, but additional data are needed to prove that conclusively. Therefore, this variant has been classified as Likely Pathogenic. This variant disrupts the p.Leu91 amino acid residue in GCH1. Other variant(s) that disrupt this residue have been observed in individuals with GCH1-related conditions (PMID: 15753436, 18554280; Invitae), which suggests that this may be a clinically significant amino acid residue. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt GCH1 protein function. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces leucine, which is neutral and non-polar, with glutamine, which is neutral and polar, at codon 91 of the GCH1 protein (p.Leu91Gln).

The information on this website is not intended for direct diagnostic use or medical decision-making without review by a genetics professional. Individuals should not change their health behavior solely on the basis of information contained on this website. Neither the University of Utah nor the National Institutes of Health independently verfies the submitted information. If you have questions about the information contained on this website, please see a health care professional.