rs1555212016
Variant summary
Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PM1PM2PM5PP3_ModeratePP5_Strong
The NM_000545.8(HNF1A):c.817A>C(p.Lys273Gln) 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. 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. K273N) has been classified as Pathogenic.
Frequency
Consequence
NM_000545.8 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Pathogenic. Variant got 12 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
HNF1A | NM_000545.8 | c.817A>C | p.Lys273Gln | missense_variant | 4/10 | ENST00000257555.11 | |
HNF1A | NM_001306179.2 | c.817A>C | p.Lys273Gln | missense_variant | 4/10 | ||
HNF1A | NM_001406915.1 | c.817A>C | p.Lys273Gln | missense_variant | 4/9 | ||
HNF1A | XM_024449168.2 | c.817A>C | p.Lys273Gln | missense_variant | 4/9 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
HNF1A | ENST00000257555.11 | c.817A>C | p.Lys273Gln | 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
Maturity onset diabetes mellitus in young Pathogenic:1
Likely risk allele, 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 rs1555212016 with MODY3. - |
not specified Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Athena Diagnostics | Jun 12, 2017 | - - |
Monogenic diabetes Uncertain:1
Uncertain significance, reviewed by expert panel | curation | ClinGen Monogenic Diabetes Variant Curation Expert Panel | Apr 14, 2022 | The c.817A>C variant in the HNF1 homeobox A gene, HNF1A, causes an amino acid change of lysine to glutamine at codon 273 (p.(Lys273Gln) of NM_000545.8. This variant is predicted to be deleterious by computational evidence, with a REVEL score of 0.817, which is greater than the MDEP VCEP threshold of 0.70 (PP3). Additionally, 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) and is absent from gnomAD v2.1.1 (PM2_Supporting). In summary, c.817A>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. - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at