rs1555815393
Variant summary
Our verdict is Likely pathogenic. Variant got 9 ACMG points: 9P and 0B. PM2_SupportingPVS1
This summary comes from the ClinGen Evidence Repository: The c.498T>A variant in the hepatocyte nuclear factor 4-alpha gene, HNF4A, results in a premature termination at codon 166 (p.(Cys166Ter)) of NM_175914.5. This variant, located in biologically-relevant exon 5 of 10, is predicted to lead to nonsense mediated decay in a gene in which loss-of-function is an established disease mechanism (PVS1; PMID:23348805). This variant is absent in gnomAD v2.1.1 (PM2_Supporting). It was identified in two unrelated individuals with non-autoimmune and non-absolute/near-absolute insulin-deficient diabetes; however, PS4_Moderate cannot be applied because this number is below the ClinGen MDEP threshold (ClinVar ID: 520675). In summary, c.498T>A meets the criteria to be classified as likely pathogenic for monogenic diabetes. ACMG/AMP criteria applied, as specified by the ClinGen MDEP (specification version 2.0.0, approved 10/11/2023): PVS1, PM2_Supporting). LINK:https://erepo.genome.network/evrepo/ui/classification/CA409106015/MONDO:0015967/085
Frequency
Consequence
ENST00000316673.9 stop_gained
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Likely_pathogenic. Variant got 9 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
HNF4A | NM_175914.5 | c.498T>A | p.Cys166Ter | stop_gained | 5/10 | ENST00000316673.9 | NP_787110.2 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
HNF4A | ENST00000316673.9 | c.498T>A | p.Cys166Ter | stop_gained | 5/10 | 1 | NM_175914.5 | ENSP00000315180 |
Frequencies
GnomAD3 genomes Cov.: 32
GnomAD4 exome Cov.: 33
GnomAD4 genome Cov.: 32
ClinVar
Submissions by phenotype
Maturity onset diabetes mellitus in young Pathogenic:2
Pathogenic, criteria provided, single submitter | clinical testing | Ambry Genetics | Nov 16, 2017 | The p.C166* pathogenic mutation (also known as c.498T>A), located in coding exon 5 of the HNF4A gene, results from a T to A substitution at nucleotide position 498. This changes the amino acid from a cysteine to a stop codon within coding exon 5. This alteration is expected to result in loss of function by premature protein truncation or nonsense-mediated mRNA decay. As such, this alteration is interpreted as a disease-causing mutation. - |
Likely pathogenic, criteria provided, single submitter | research | Clinical Genomics, Uppaluri K&H Personalized Medicine Clinic | - | Potent mutations in HNF4A are associated with poor insulin secretion in response to hyperglycemia. Associated with MODY1. Patients initially respond well to sulfonylureas but eventually become insulin dependent. However, more evidence is required to ascertain the role of this particular variant rs1555815393 in MODY, yet. - |
Monogenic diabetes Pathogenic:1
Likely pathogenic, reviewed by expert panel | curation | ClinGen Monogenic Diabetes Variant Curation Expert Panel | May 09, 2024 | The c.498T>A variant in the hepatocyte nuclear factor 4-alpha gene, HNF4A, results in a premature termination at codon 166 (p.(Cys166Ter)) of NM_175914.5. This variant, located in biologically-relevant exon 5 of 10, is predicted to lead to nonsense mediated decay in a gene in which loss-of-function is an established disease mechanism (PVS1; PMID: 23348805). This variant is absent in gnomAD v2.1.1 (PM2_Supporting). It was identified in two unrelated individuals with non-autoimmune and non-absolute/near-absolute insulin-deficient diabetes; however, PS4_Moderate cannot be applied because this number is below the ClinGen MDEP threshold (ClinVar ID: 520675). In summary, c.498T>A meets the criteria to be classified as likely pathogenic for monogenic diabetes. ACMG/AMP criteria applied, as specified by the ClinGen MDEP (specification version 2.0.0, approved 10/11/2023): PVS1, PM2_Supporting). - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at