DDG2P
Gene: CRYBA4 Red List (low evidence)Red List (low evidence)
The DDG2P confidence category for the disease MICROPHTHALMIA ISOLATED WITH CATARACT TYPE 4, OMIM:610426 is limited. The allelic requirement and mutation consequence are monoallelic_autosomal and altered gene product structure (PMIDs: 15452067;20577656;16960806).Created: 4 Oct 2023, 5:08 p.m. | Last Modified: 4 Oct 2023, 5:08 p.m.
Panel Version: 3.12
Mode of inheritance
MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Phenotypes
MICROPHTHALMIA ISOLATED WITH CATARACT TYPE 4, OMIM:610426
Publications
Mode of pathogenicity
Other
Green List (high evidence)
Multiple DD-Gene2Phenotype ratings (confirmed; possible). Changed rating to Green to reflect highest DD-G2P Disease confidence: confirmed for CATARACT ZONULAR TYPE 2.Created: 28 Jan 2019, 2:29 p.m.
Added watchlist tag to highlight different DD-G2P ratings for different gene:disorder associations.Created: 19 Nov 2018, 1:45 p.m.
DDG2P mode of pathogenicity for both disorders: dominant negative. Multiple ratings in DD-G2P download: Rated confirmed for CATARACT ZONULAR TYPE 2 610425, and rated possible for MICROPHTHALMIA ISOLATED WITH CATARACT TYPE 4 610426.Created: 19 Nov 2018, 11:29 a.m.
Phenotypes for gene: CRYBA4 were changed from MICROPHTHALMIA ISOLATED WITH CATARACT TYPE 4, OMIM:610426 to MICROPHTHALMIA ISOLATED WITH CATARACT TYPE 4, OMIM:610426
Phenotypes for gene: CRYBA4 were changed from MICROPHTHALMIA ISOLATED WITH CATARACT TYPE 4, OMIM:610426 to MICROPHTHALMIA ISOLATED WITH CATARACT TYPE 4, OMIM:610426
Phenotypes for gene: CRYBA4 were changed from CATARACT ZONULAR TYPE 2 610425; MICROPHTHALMIA ISOLATED WITH CATARACT TYPE 4 610426 to MICROPHTHALMIA ISOLATED WITH CATARACT TYPE 4, OMIM:610426
Tag watchlist was removed from gene: CRYBA4.
Source Expert Review Red was added to CRYBA4. Mode of pathogenicity for gene CRYBA4 was changed from Other - please provide details in the comments to Other Publications for gene: CRYBA4 were updated from 16960806 to 16960806; 15452067; 20577656 Rating Changed from Green List (high evidence) to Red List (low evidence)
Rebecca Foulger: DDG2P mode of pathogenicity fo
Gene: cryba4 has been classified as Green List (High Evidence).
Tag watchlist tag was added to gene: CRYBA4.
Added phenotypes MICROPHTHALMIA ISOLATED WITH CATARACT TYPE 4 610426 for gene: CRYBA4 Publications for gene CRYBA4 were changed from 16960806; 15452067 to 16960806
gene: CRYBA4 was added gene: CRYBA4 was added to DDG2P. Sources: Expert Review Amber,DD-Gene2Phenotype Mode of inheritance for gene: CRYBA4 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown Publications for gene: CRYBA4 were set to 16960806; 15452067 Phenotypes for gene: CRYBA4 were set to CATARACT ZONULAR TYPE 2 610425 Mode of pathogenicity for gene: CRYBA4 was set to Other - please provide details in the comments
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.