Intellectual disability - microarray and sequencing
Gene: SLC32A1 Green List (high evidence)This gene is not currently associated with a disease phenotype in OMIM, but checked PMID:36073542 to make sure it is the same gene listed in the publication as on this panel and it is, so added the gene-checked tagCreated: 16 Oct 2023, 8:12 p.m. | Last Modified: 16 Oct 2023, 8:12 p.m.
Panel Version: 5.313
Green List (high evidence)
Comment on phenotypes: Gene-checked tag removed as this gene now has a relevant phenotype listed in OMIM (Developmental and epileptic encephalopathy 114, OMIM:620774)Created: 3 Apr 2024, 11:09 a.m. | Last Modified: 3 Apr 2024, 11:09 a.m.
Panel Version: 5.513
The rating of this gene has been updated to Green and the mode of inheritance set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted following NHS Genomic Medicine Service approval.Created: 11 Oct 2023, 9:34 a.m. | Last Modified: 11 Oct 2023, 9:34 a.m.
Panel Version: 5.286
Mode of inheritance
MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Green List (high evidence)
Comment on list classification: There is sufficient evidence (four unrelated cases and supporting functional studies) for this gene to be promoted to GREEN at the next GMS update.Created: 4 May 2023, 3:18 p.m. | Last Modified: 4 May 2023, 3:18 p.m.
Panel Version: 5.107
Comment on list classification: There is sufficient evidence (four unrelated cases and supporting functional studies) for this gene to be promoted to GREEN at the next GMS update.Created: 4 May 2023, 3:18 p.m. | Last Modified: 4 May 2023, 3:18 p.m.
Panel Version: 5.107
Comment on list classification: There is sufficient evidence (four unrelated cases and supporting functional studies) for this gene to be promoted to GREEN at the next GMS update.Created: 4 May 2023, 3:17 p.m. | Last Modified: 4 May 2023, 3:17 p.m.
Panel Version: 5.107
Comment on list classification: There is sufficient evidence (four unrelated cases and supporting functional studies) for this gene to be promoted to GREEN at the next GMS update.Created: 4 May 2023, 3:17 p.m. | Last Modified: 4 May 2023, 3:17 p.m.
Panel Version: 5.106
PMID:36073542 reported four unrelated patients with four different de novo missense variants in SLC32A1 gene reported with global developmental delay, moderate-to-severe intellectual disability, infantile-onset epilepsy within the first 18 months of life, and a choreiform, dystonic, or dyskinetic movement disorder.
In silico modeling and functional analyses showed that these variants can impair GABAergic neurotransmission through at least two mechanisms, by affecting synaptic vesicle filling and by altering synaptic short-term plasticity.
Although this gene has not yet been associated with phenotypes in OMIM, it has been added to Gene2Phenotype with 'moderate' rating in the DD panel.
Sources: LiteratureCreated: 4 May 2023, 3:14 p.m. | Last Modified: 4 May 2023, 3:14 p.m.
Panel Version: 5.105
Mode of inheritance
MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Phenotypes
developmental and epileptic encephalopathy, MONDO:0100062
Publications
Phenotypes for gene: SLC32A1 were changed from developmental and epileptic encephalopathy, MONDO:0100062 to Developmental and epileptic encephalopathy 114, OMIM:620774
Tag gene-checked was removed from gene: SLC32A1.
Tag gene-checked tag was added to gene: SLC32A1.
Tag Q2_23_promote_green was removed from gene: SLC32A1.
Source NHS GMS was added to SLC32A1. Source Expert Review Green was added to SLC32A1. Rating Changed from Amber List (moderate evidence) to Green List (high evidence)
Gene: slc32a1 has been classified as Amber List (Moderate Evidence).
Gene: slc32a1 has been classified as Amber List (Moderate Evidence).
Gene: slc32a1 has been classified as Amber List (Moderate Evidence).
Gene: slc32a1 has been classified as Amber List (Moderate Evidence).
Gene: slc32a1 has been classified as Amber List (Moderate Evidence).
Gene: slc32a1 has been classified as Amber List (Moderate Evidence).
Tag Q2_23_promote_green tag was added to gene: SLC32A1.
gene: SLC32A1 was added gene: SLC32A1 was added to Intellectual disability - microarray and sequencing. Sources: Literature Mode of inheritance for gene: SLC32A1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: SLC32A1 were set to 36073542 Phenotypes for gene: SLC32A1 were set to developmental and epileptic encephalopathy, MONDO:0100062 Review for gene: SLC32A1 was set to GREEN
If promoting or demoting a gene, please provide comments to justify a decision to move it.
Genes included in a Genomics England gene panel for a rare disease category (green list) should fit the criteria A-E outlined below.
These guidelines were developed as a combination of the ClinGen DEFINITIVE evidence for a causal role of the gene in the disease(a), and the Developmental Disorder Genotype-Phenotype (DDG2P) CONFIRMED DD Gene evidence level(b) (please see the original references provided below for full details). These help provide a guideline for expert reviewers when assessing whether a gene should be on the green or the red list of a panel.
A. There are plausible disease-causing mutations(i) within, affecting or encompassing an interpretable functional region(ii) of this gene identified in multiple (>3) unrelated cases/families with the phenotype(iii).
OR
B. There are plausible disease-causing mutations(i) within, affecting or encompassing cis-regulatory elements convincingly affecting the expression of a single gene identified in multiple (>3) unrelated cases/families with the phenotype(iii).
OR
C. As definitions A or B but in 2 or 3 unrelated cases/families with the phenotype, with the addition of convincing bioinformatic or functional evidence of causation e.g. known inborn error of metabolism with mutation in orthologous gene which is known to have the relevant deficient enzymatic activity in other species; existence of an animal model which recapitulates the human phenotype.
AND
D. Evidence indicates that disease-causing mutations follow a Mendelian pattern of causation appropriate for reporting in a diagnostic setting(iv).
AND
E. No convincing evidence exists or has emerged that contradicts the role of the gene in the specified phenotype.
(i)Plausible disease-causing mutations: Recurrent de novo mutations convincingly affecting gene function. Rare, fully-penetrant mutations - relevant genotype never, or very rarely, seen in controls. (ii) Interpretable functional region: ORF in protein coding genes miRNA stem or loop. (iii) Phenotype: the rare disease category, as described in the eligibility statement. (iv) Intermediate penetrance genes should not be included.
It’s assumed that loss-of-function variants in this gene can cause the disease/phenotype unless an exception to this rule is known. We would like to collect information regarding exceptions. An example exception is the PCSK9 gene, where loss-of-function variants are not relevant for a hypercholesterolemia phenotype as they are associated with increased LDL-cholesterol uptake via LDLR (PMID: 25911073).
If a curated set of known-pathogenic variants is available for this gene-phenotype, please contact us at [email protected]
We classify loss-of-function variants as those with the following Sequence Ontology (SO) terms:
Term descriptions can be found on the PanelApp homepage and Ensembl.
If you are submitting this evaluation on behalf of a clinical laboratory please indicate whether you report variants in this gene as part of your current diagnostic practice by checking the box
Standardised terms were used to represent the gene-disease mode of inheritance, and were mapped to commonly used terms from the different sources. Below each of the terms is described, along with the equivalent commonly-used terms.
A variant on one allele of this gene can cause the disease, and imprinting has not been implicated.
A variant on the paternally-inherited allele of this gene can cause the disease, if the alternate allele is imprinted (function muted).
A variant on the maternally-inherited allele of this gene can cause the disease, if the alternate allele is imprinted (function muted).
A variant on one allele of this gene can cause the disease. This is the default used for autosomal dominant mode of inheritance where no knowledge of the imprinting status of the gene required to cause the disease is known. Mapped to the following commonly used terms from different sources: autosomal dominant, dominant, AD, DOMINANT.
A variant on both alleles of this gene is required to cause the disease. Mapped to the following commonly used terms from different sources: autosomal recessive, recessive, AR, RECESSIVE.
The disease can be caused by a variant on one or both alleles of this gene. Mapped to the following commonly used terms from different sources: autosomal recessive or autosomal dominant, recessive or dominant, AR/AD, AD/AR, DOMINANT/RECESSIVE, RECESSIVE/DOMINANT.
A variant on one allele of this gene can cause the disease, however a variant on both alleles of this gene can result in a more severe form of the disease/phenotype.
A variant in this gene can cause the disease in males as they have one X-chromosome allele, whereas a variant on both X-chromosome alleles is required to cause the disease in females. Mapped to the following commonly used term from different sources: X-linked recessive.
A variant in this gene can cause the disease in males as they have one X-chromosome allele. A variant on one allele of this gene may also cause the disease in females, though the disease/phenotype may be less severe and may have a later-onset than is seen in males. X-linked inactivation and mosaicism in different tissues complicate whether a female presents with the disease, and can change over their lifetime. This term is the default setting used for X-linked genes, where it is not known definitately whether females require a variant on each allele of this gene in order to be affected. Mapped to the following commonly used terms from different sources: X-linked dominant, x-linked, X-LINKED, X-linked.
The gene is in the mitochondrial genome and variants within this can cause this disease, maternally inherited. Mapped to the following commonly used term from different sources: Mitochondrial.
Mapped to the following commonly used terms from different sources: Unknown, NA, information not provided.
For example, if the mode of inheritance is digenic, please indicate this in the comments and which other gene is involved.