rs1555212006
Variant summary
Our verdict is Pathogenic. Variant got 10 ACMG points: 10P and 0B. PM1PM2PM5PP3_Strong
The NM_000545.8(HNF1A):c.794A>C(p.Tyr265Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 11/19 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. Y265C) has been classified as Likely pathogenic.
Frequency
Consequence
NM_000545.8 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Pathogenic. Variant got 10 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
HNF1A | NM_000545.8 | c.794A>C | p.Tyr265Ser | missense_variant | 4/10 | ENST00000257555.11 | |
HNF1A | NM_001306179.2 | c.794A>C | p.Tyr265Ser | missense_variant | 4/10 | ||
HNF1A | NM_001406915.1 | c.794A>C | p.Tyr265Ser | missense_variant | 4/9 | ||
HNF1A | XM_024449168.2 | c.794A>C | p.Tyr265Ser | missense_variant | 4/9 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
HNF1A | ENST00000257555.11 | c.794A>C | p.Tyr265Ser | missense_variant | 4/10 | 1 | NM_000545.8 | P4 |
Frequencies
GnomAD3 genomes ? Cov.: 32
GnomAD4 exome Cov.: 33
GnomAD4 genome ? Cov.: 32
ClinVar
Submissions by phenotype
not specified Uncertain:2
Uncertain significance, criteria provided, single submitter | clinical testing | Genetic Services Laboratory, University of Chicago | Jan 08, 2020 | - - |
Uncertain significance, criteria provided, single submitter | clinical testing | Women's Health and Genetics/Laboratory Corporation of America, LabCorp | Nov 10, 2023 | Variant summary: HNF1A c.794A>C (p.Tyr265Ser) results in a non-conservative amino acid change located in the Homeobox domain (IPR001356) of the encoded protein sequence. Five of five in-silico tools predict a damaging effect of the variant on protein function. The variant was absent in 249430 control chromosomes. The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. To our knowledge, no occurrence of c.794A>C in individuals affected with Maturity Onset Diabetes Of The Young 3 and no experimental evidence demonstrating its impact on protein function have been reported. Three submitters have cited clinical-significance assessments for this variant to ClinVar after 2014. All submitters classified the variant as uncertain significance. Based on the evidence outlined above, the variant was classified as uncertain significance. - |
Maturity onset diabetes mellitus in young Pathogenic:1
Likely pathogenic, criteria provided, single submitter | research | Clinical Genomics, Uppaluri K&H Personalized Medicine Clinic | - | Mutations in HNF1A gene can predispose to MODY3. It is associated with both micro and macrovascular complications of diabetes, especially cardiovascular complications. Associated with glucosuria. May respond well to sulfonylureas. However, more evidence is required to confer the association of this particular variant rs1555212006 with MODY3. - |
Monogenic diabetes Uncertain:1
Uncertain significance, reviewed by expert panel | curation | ClinGen Monogenic Diabetes Variant Curation Expert Panel | Apr 15, 2022 | The c.794A>C variant in the HNF1 homeobox A gene, HNF1A, causes an amino acid change of tyrosine to serine at codon 265 (p.Tyr265Ser) of NM_000545.8. 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). Also, this variant is absent from gnomAD v2.1.1 (PM2_Supporting). This variant is predicted to be deleterious by computational evidence, with a REVEL score of 0.938, which is greater than the MDEP VCEP threshold of 0.70 (PP3). Another missense variant, c.794A>G (p.Tyr265Cys), has been classified as a VUS by the ClinGen MDEP; therefore, PM5 will not be applied. In summary, c.794A>C meets the criteria to be classified as a variant of uncertain significance for monogenic diabetes. ACMG/AMP criteria applied, as specified by the ClinGen MDEP (specification version 1.1, approved 9/30/2021): PM1, PM2_Supporting, PP3 - |
not provided Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Athena Diagnostics | Dec 09, 2022 | Available data are insufficient to determine the clinical significance of the variant at this time. This variant has been identified in at least one individual with clinical features associated with this gene. This variant has not been reported in large, multi-ethnic general populations (http://gnomad.broadinstitute.org). The variant is located in a region that is considered important for protein function and/or structure. - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at