Genetic Variant HNF4A:c.-83C>T (chr20-44355722-C-T) – ACMG Classification: Likely_benign (-6 pts)

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_ModerateBS2

The NM_175914.5(HNF4A):c.-83C>T variant causes a 5 prime UTR premature start codon gain change. The variant allele was found at a frequency of 0.0000699 in 1,259,794 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain risk allele (★★).

Frequency

Genomes: 𝑓 0.000079 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000069 ( 0 hom. )

Consequence

HNF4A
NM_175914.5 5_prime_UTR_premature_start_codon_gain

Scores

Clinical Significance

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

Conservation

PhyloP100: 3.60

Variant links:

Genes affected

HNF4A (HGNC:5024): (hepatocyte nuclear factor 4 alpha) The protein encoded by this gene is a nuclear transcription factor which binds DNA as a homodimer. The encoded protein controls the expression of several genes, including hepatocyte nuclear factor 1 alpha, a transcription factor which regulates the expression of several hepatic genes. This gene may play a role in development of the liver, kidney, and intestines. Mutations in this gene have been associated with monogenic autosomal dominant non-insulin-dependent diabetes mellitus type I. Alternative splicing of this gene results in multiple transcript variants encoding several different isoforms. [provided by RefSeq, Apr 2012]

HNF4A links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.32).

BS2

High AC in GnomAd4 at 12 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
HNF4A	NM_175914.5 link	c.-83C>T		5_prime_UTR_premature_start_codon_gain_variant	Exon 1 of 10	ENST00000316673.9	NP_787110.2	P41235-5F1D8T0
HNF4A	NM_175914.5 link	c.-83C>T		5_prime_UTR_variant	Exon 1 of 10	ENST00000316673.9	NP_787110.2	P41235-5F1D8T0

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
HNF4A	ENST00000316673 link	c.-83C>T		5_prime_UTR_premature_start_codon_gain_variant	Exon 1 of 10	1	NM_175914.5	ENSP00000315180.4		P41235-5
HNF4A	ENST00000316673 link	c.-83C>T		5_prime_UTR_variant	Exon 1 of 10	1	NM_175914.5	ENSP00000315180.4		P41235-5

Frequencies

GnomAD3 genomes

AF:

0.0000788

AC:

AN:

152236

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

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:

0.000162

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.0000686

AC:

AN:

1107558

Hom.:

Cov.:

AF XY:

0.0000688

AC XY:

AN XY:

566918

show subpopulations

Gnomad4 AFR exome

AF:

0.0000374

Gnomad4 AMR exome

AF:

0.000115

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:

0.0000844

Gnomad4 OTH exome

AF:

0.0000619

GnomAD4 genome

AF:

0.0000788

AC:

AN:

152236

Hom.:

Cov.:

AF XY:

0.0000672

AC XY:

AN XY:

74370

show subpopulations

Gnomad4 AFR

AF:

0.0000241

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:

0.000162

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000214

Hom.:

Bravo

AF:

0.0000756

ClinVar

Significance: Uncertain significance/Uncertain risk allele

Submissions summary: Uncertain:1Other:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Nov 23, 2016

Genetic Services Laboratory, University of Chicago

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Maturity onset diabetes mellitus in young

Other:1

Clinical Genomics, Uppaluri K&H Personalized Medicine Clinic

Significance: Uncertain risk allele

Review Status: criteria provided, single submitter

Collection Method: research

Potent mutations in HNF4A are associated with poor insulin secretion in response to hyperglycemia. Associated with MODY1. Patients initially respond well to sulfonylureas but eventually become insulin dependent. However, more evidence is required to ascertain the role of this particular variant rs879092890 in MODY, yet. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.32

CADD

Benign

DANN

Benign

0.95

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

Splicing

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