Evidence Repository - Clinical Genome Resources

The ClinGen Evidence Repository is an FDA-recognized human genetic variant database containing expert-curated assertions regarding variants' pathogenicity and supporting evidence summaries. [Disclaimer]

Link to SEPIO compliant JSON-LD document

Variant: NM_001306179.2:c.394G>A

CA386959458

Gene: HNF1A

Condition: monogenic diabetes

Inheritance Mode: Autosomal dominant inheritance

Link to MONDO

UUID: f120311c-b751-491e-9eaf-c0e2b2588f67

HGVS expressions

NM_001306179.2:c.394G>A

NC_000012.12:g.120988900G>A

CM000674.2:g.120988900G>A

NC_000012.11:g.121426703G>A

CM000674.1:g.121426703G>A

NC_000012.10:g.119911086G>A

NG_011731.2:g.15155G>A

ENST00000560968.6:c.394G>A

ENST00000257555.11:c.394G>A

ENST00000257555.10:c.394G>A

ENST00000400024.6:c.394G>A

ENST00000402929.5:n.529G>A

ENST00000535955.5:n.43-8591G>A

ENST00000538626.2:n.191-8591G>A

ENST00000538646.5:c.394G>A

ENST00000540108.1:c.327-4620G>A

ENST00000541395.5:c.394G>A

ENST00000541924.5:c.394G>A

ENST00000543427.5:c.394G>A

ENST00000544413.2:c.394G>A

ENST00000544574.5:c.73-7717G>A

ENST00000560968.5:c.537G>A

ENST00000615446.4:c.-257-7362G>A

ENST00000617366.4:c.394G>A

NM_000545.5:c.394G>A

NM_000545.6:c.394G>A

NM_001306179.1:c.394G>A

NM_000545.8:c.394G>A

Pathogenic

PP1_Strong PP4_Moderate PP3 PM1 PM2_Supporting

PS4

Evidence Links 0

Expert Panel

Monogenic Diabetes VCEP

Criteria Specification Information

Criteria Specification: ClinGen Monogenic Diabetes Expert Panel Specifications to the ACMG/AMP Variant Interpretation Guidelines for HNF1A Version 2.1.0

Criteria Specification Approval History

Criteria Specifications for this VCEP

Evidence submitted by expert panel

Monogenic Diabetes VCEP

The c.394G>A variant in the HNF1 homeobox A gene, HNF1A, causes an amino acid change of glutamic acid to lysine at codon 132 (p.(Glu132Lys)) of NM_000545.8. This variant is absent from gnomAD v2.1.1 (PM2_Supporting). This variant resides in an amino acid within the HNF1α DNA binding domain that directly binds DNA, which is defined as critical for the protein’s function by the ClinGen MDEP (PM1). This variant is predicted to be deleterious by computational evidence, with a REVEL score of 0.972, which is greater than the MDEP VCEP threshold of 0.70 (PP3). This variant was identified in 3 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 (PMIDs: 17407387, 11272211, internal lab contributors). This variant was segregated with diabetes/hyperglycemia, with 6 informative meioses in 2 families (PP1_Strong; internal lab contributors). This variant was identified in an individual with a clinical history highly specific for HNF1A-MODY (MODY probability calculator result >50%, negative genetic testing for HNF4A, and negative antibodies) (PP4_Moderate; internal lab contributors). In summary, c.394G>A meets the criteria to be classified as pathogenic for monogenic diabetes. ACMG/AMP criteria applied, as specified by the ClinGen MDEP (specification version 2.1.0, approved 8/11/2023): PM2_supporting, PM1, PP3, PP1_strong, PP4_moderate.

PP1_Strong

This variant was segregated with diabetes/hyperglycemia, with 6 informative meioses in 2 families (PP1_Strong; internal lab contributors).

PP4_Moderate

This variant was identified in an individual with a clinical history highly specific for HNF1A-MODY (MODY probability calculator result >50%, negative genetic testing for HNF4A, and negative antibodies) (PP4; internal lab contributors).

PP3

This variant is predicted to be deleterious by computational evidence, with a REVEL score of 0.972, which is greater than the MDEP VCEP threshold of 0.70 (PP3).

PM1

This variant resides in an amino acid within the HNF1α DNA binding domain that directly binds DNA, which is defined as critical for the protein’s function by the ClinGen MDEP (PM1).

PM2_Supporting

This variant is absent from gnomAD v2.1.1 (PM2_Supporting). gnomAD v4.0.0, absent

PS4

This variant was identified in 2 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 (PMIDs: 17407387, 11272211, internal lab contributors).

Approved on: 2024-06-09

Published on: 2024-06-09

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