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NM_175914.5(HNF4A):c.352C>T (p.Arg118Ter) AND Monogenic diabetes

Germline classification:
Pathogenic (1 submission)
Last evaluated:
Apr 5, 2024
Review status:
3 stars out of maximum of 4 stars
reviewed by expert panel
Somatic classification
of clinical impact:
None
Review status:
(0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided
Somatic classification
of oncogenicity:
None
Review status:
(0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided
Record status:
current
Accession:
RCV003993685.1

Allele description [Variation Report for NM_175914.5(HNF4A):c.352C>T (p.Arg118Ter)]

NM_175914.5(HNF4A):c.352C>T (p.Arg118Ter)

Gene:
HNF4A:hepatocyte nuclear factor 4 alpha [Gene - OMIM - HGNC]
Variant type:
single nucleotide variant
Cytogenetic location:
20q13.12
Genomic location:
Preferred name:
NM_175914.5(HNF4A):c.352C>T (p.Arg118Ter)
Other names:
NM_175914.5(HNF4A):c.352C>T; p.Arg118Ter
HGVS:
  • NC_000020.11:g.44413726C>T
  • NG_009818.1:g.62926C>T
  • NM_000457.6:c.418C>T
  • NM_001030003.3:c.352C>T
  • NM_001030004.3:c.352C>T
  • NM_001258355.2:c.397C>T
  • NM_001287182.2:c.343C>T
  • NM_001287183.2:c.343C>T
  • NM_001287184.2:c.343C>T
  • NM_175914.5:c.352C>TMANE SELECT
  • NM_178849.3:c.418C>T
  • NM_178850.3:c.418C>T
  • NP_000448.3:p.Arg140Ter
  • NP_001025174.1:p.Arg118Ter
  • NP_001025175.1:p.Arg118Ter
  • NP_001245284.1:p.Arg133Ter
  • NP_001274111.1:p.Arg115Ter
  • NP_001274112.1:p.Arg115Ter
  • NP_001274113.1:p.Arg115Ter
  • NP_787110.2:p.Arg118Ter
  • NP_849180.1:p.Arg140Ter
  • NP_849181.1:p.Arg140Ter
  • LRG_483t1:c.352C>T
  • LRG_483:g.62926C>T
  • NC_000020.10:g.43042366C>T
  • NM_175914.4:c.352C>T
Protein change:
R115*
Links:
dbSNP: rs2146412136
NCBI 1000 Genomes Browser:
rs2146412136
Molecular consequence:
  • NM_000457.6:c.418C>T - nonsense - [Sequence Ontology: SO:0001587]
  • NM_001030003.3:c.352C>T - nonsense - [Sequence Ontology: SO:0001587]
  • NM_001030004.3:c.352C>T - nonsense - [Sequence Ontology: SO:0001587]
  • NM_001258355.2:c.397C>T - nonsense - [Sequence Ontology: SO:0001587]
  • NM_001287182.2:c.343C>T - nonsense - [Sequence Ontology: SO:0001587]
  • NM_001287183.2:c.343C>T - nonsense - [Sequence Ontology: SO:0001587]
  • NM_001287184.2:c.343C>T - nonsense - [Sequence Ontology: SO:0001587]
  • NM_175914.5:c.352C>T - nonsense - [Sequence Ontology: SO:0001587]
  • NM_178849.3:c.418C>T - nonsense - [Sequence Ontology: SO:0001587]
  • NM_178850.3:c.418C>T - nonsense - [Sequence Ontology: SO:0001587]

Condition(s)

Name:
Monogenic diabetes
Identifiers:
MONDO: MONDO:0015967; MedGen: C3888631

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Assertion and evidence details

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Submission AccessionSubmitterReview Status
(Assertion method)		Clinical Significance
(Last evaluated)		OriginMethodCitations
SCV004812231ClinGen Monogenic Diabetes Variant Curation Expert Panel
reviewed by expert panel

(ClinGen Diabetes ACMG Specifications HNF4A V2.0.0)		Pathogenic
(Apr 5, 2024) 		germlinecuration

Citation Link

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Summary from all submissions

EthnicityOriginAffectedIndividualsFamiliesChromosomes testedNumber TestedFamily historyMethod
not providedgermlineunknownnot providednot providednot providednot providednot providedcuration

Details of each submission

From ClinGen Monogenic Diabetes Variant Curation Expert Panel, SCV004812231.1

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not providednot providednot providednot providedcurationnot provided

Description

The c.352C>T variant in the hepatocyte nuclear factor 4-alpha gene, HNF4A, results in a premature termination at codon 118 (p.(Arg118Ter)) of NM_175914.5. This variant, located in biologically-relevant exon 4 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), and was identified in four unrelated individuals with non-autoimmune and non-absolute/near-absolute insulin-deficient diabetes (PS4_Moderate; ClinVar ID:1457657, internal lab contributors). One of these individuals has a clinical history highly specific for HNF4A-MODY (MODY probability calculator result >50%, negative genetic testing for HNF1A, and antibody negative) (PP4_Moderate; internal lab contributor). This variant also segregated with diabetes, with four informative meioses in two families (PP1_Strong; internal lab contributors). In summary, c.352C>T meets the criteria to be classified as pathogenic for monogenic diabetes. ACMG/AMP criteria applied, as specified by the ClinGen MDEP (specification version 2.0.0, approved 10/11/23): PVS1, PP1_Strong, PP4_Moderate, PS4_Moderate, PM2_Supporting.

#SampleMethodObservation
OriginAffectedNumber testedTissuePurposeMethodIndividualsAllele frequencyFamiliesCo-occurrences
1germlineunknownnot providednot providednot providednot providednot providednot providednot provided

Last Updated: Sep 29, 2024