12-121001065-T-C

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 0P and 2B. BP4_Moderate

The NM_000545.8(HNF1A):c.1769T>C(p.Val590Ala) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000806 in 1,613,108 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain risk allele (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V590M) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000075 ( 0 hom. )

Consequence

HNF1A
NM_000545.8 missense, splice_region

Scores

Splicing: ADA: 0.6457

Clinical Significance

Uncertain significance/Uncertain risk allele criteria provided, multiple submitters, no conflicts U:2O:1

Conservation

PhyloP100: 2.26

Variant links:

Genes affected

HNF1A (HGNC:11621): (HNF1 homeobox A) The protein encoded by this gene is a transcription factor required for the expression of several liver-specific genes. The encoded protein functions as a homodimer and binds to the inverted palindrome 5'-GTTAATNATTAAC-3'. Defects in this gene are a cause of maturity onset diabetes of the young type 3 (MODY3) and also can result in the appearance of hepatic adenomas. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Apr 2015]

HNF1A links:

C12orf43 (HGNC:25719): (chromosome 12 open reading frame 43) Predicted to be involved in Spemann organizer formation and negative regulation of Wnt signaling pathway. Predicted to be located in nuclear envelope. [provided by Alliance of Genome Resources, Apr 2022]

C12orf43 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.24682862).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
HNF1A	NM_000545.8 linkuse as main transcript	c.1769T>C	p.Val590Ala	missense_variant, splice_region_variant	10/10	ENST00000257555.11
C12orf43	NM_022895.3 linkuse as main transcript	c.*3088A>G		3_prime_UTR_variant	6/6	ENST00000288757.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
HNF1A	ENST00000257555.11 linkuse as main transcript	c.1769T>C	p.Val590Ala	missense_variant, splice_region_variant	10/10	1	NM_000545.8	P4
C12orf43	ENST00000288757.7 linkuse as main transcript	c.*3088A>G		3_prime_UTR_variant	6/6	1	NM_022895.3	P2

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152120

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000753

AC:

AN:

1460988

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

726778

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000809

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152120

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74312

show subpopulations

Gnomad4 AFR

AF:

0.0000483

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000151

ClinVar

Significance: Uncertain significance/Uncertain risk allele

Submissions summary: Uncertain:2Other:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Invitae	Dec 11, 2023	This sequence change replaces valine, which is neutral and non-polar, with alanine, which is neutral and non-polar, at codon 590 of the HNF1A protein (p.Val590Ala). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with HNF1A-related conditions. ClinVar contains an entry for this variant (Variation ID: 994545). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant¬†is likely to be tolerated. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -
Uncertain significance, criteria provided, single submitter	clinical testing	Athena Diagnostics	Jul 07, 2020	- -

Maturity onset diabetes mellitus in young

Other:1

Uncertain 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 rs928744634 with MODY3. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.17

BayesDel_addAF

Uncertain

0.14

BayesDel_noAF

Uncertain

-0.030

Cadd

Uncertain

Dann

Uncertain

0.99

Eigen

Benign

0.082

Eigen_PC

Uncertain

0.26

FATHMM_MKL

Uncertain

0.80

LIST_S2

Benign

0.68

T;T;T;T;T

M_CAP

Uncertain

0.13

MetaRNN

Benign

0.25

T;T;T;T;T

MetaSVM

Uncertain

0.19

MutationTaster

Benign

0.99

D;D;D;N

PrimateAI

Uncertain

0.51

PROVEAN

Benign

-0.99

N;.;.;N;N

REVEL

Uncertain

0.40

Sift

Benign

0.075

T;.;.;T;T

Sift4G

Benign

0.46

T;T;T;T;T

Polyphen

0.25

.;.;.;.;B

Vest4

0.26

MutPred

0.61

.;.;.;.;Loss of stability (P = 0.0505);

MVP

0.84

MPC

0.15

ClinPred

0.30

GERP RS

6.1

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

gMVP

0.80

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.65

dbscSNV1_RF

Benign

0.48

SpliceAI score (max)

0.010

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over