chr20-44414519-G-A

Variant names:

• chr20-44414519-G-A
• rs142204928
• NM_175914.5:c.439G>A

Variant summary

Our verdict is Benign. The variant received -13 ACMG points: 0P and 13B. BP4_Strong BP6 BS1 BS2

The NM_175914.5(HNF4A):​c.439G>A​(p.Val147Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000959 in 1,614,194 control chromosomes in the GnomAD database, including 20 homozygotes. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: 𝑓 0.00072 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00098 (20 hom.)
• Consequence: HNF4A NM_175914.5 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1 B:11 O:1
• Conservation: PhyloP100: 1.24
• Publications: 17 publications found

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 Gene-Disease associations (from GenCC):

• maturity-onset diabetes of the young type 1

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), Genomics England PanelApp, G2P
• monogenic diabetes

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• diabetes mellitus, noninsulin-dependent

  Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp
• Fanconi renotubular syndrome 4 with maturity-onset diabetes of the young

  Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp, G2P
• hyperinsulinism due to HNF4A deficiency

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• maturity-onset diabetes of the young

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Benign. The variant received -13 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.0075802803).
• BP6: Variant 20-44414519-G-A is Benign according to our data. Variant chr20-44414519-G-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 36353.
• BS1: Variant frequency is greater than expected in population sas. GnomAd4 allele frequency = 0.000722 (110/152334) while in subpopulation SAS AF = 0.0141 (68/4830). AF 95% confidence interval is 0.0114. There are 0 homozygotes in GnomAd4. There are 62 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.
• BS2: High AC in GnomAd4 at 110 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_175914.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	HNF4A	NM_175914.5	MANE Select	c.439G>A	p.Val147Ile	missense	Exon 5 of 10	NP_787110.2
	HNF4A	NM_000457.6		c.505G>A	p.Val169Ile	missense	Exon 5 of 10	NP_000448.3
	HNF4A	NM_001258355.2		c.484G>A	p.Val162Ile	missense	Exon 6 of 11	NP_001245284.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	HNF4A	ENST00000316673.9	TSL:1 MANE Select	c.439G>A	p.Val147Ile	missense	Exon 5 of 10	ENSP00000315180.4	P41235-5
	HNF4A	ENST00000316099.10	TSL:1	c.505G>A	p.Val169Ile	missense	Exon 5 of 10	ENSP00000312987.3	P41235-1
	HNF4A	ENST00000415691.2	TSL:1	c.505G>A	p.Val169Ile	missense	Exon 5 of 10	ENSP00000412111.1	P41235-2

Frequencies

GnomAD3 genomes AF: 0.000723 AC: 110 AN: 152216 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000483

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00288

Gnomad SAS AF: 0.0141

Gnomad FIN AF: 0.000188

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000323

Gnomad OTH AF: 0.000478

GnomAD2 exomes AF: 0.00201 AC: 505 AN: 251390 AF XY: 0.00241

Gnomad AFR exome AF: 0.000123

Gnomad AMR exome AF: 0.0000578

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00185

Gnomad FIN exome AF: 0.000185

Gnomad NFE exome AF: 0.000202

Gnomad OTH exome AF: 0.00114

GnomAD4 exome AF: 0.000984 AC: 1438 AN: 1461860 Hom.: 20 Cov.: 33 AF XY: 0.00133 AC XY: 968 AN XY: 727226

African (AFR) AF: 0.0000299 AC: 1 AN: 33480

American (AMR) AF: 0.0000671 AC: 3 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.0000383 AC: 1 AN: 26134

East Asian (EAS) AF: 0.00174 AC: 69 AN: 39700

South Asian (SAS) AF: 0.0123 AC: 1065 AN: 86238

European-Finnish (FIN) AF: 0.0000936 AC: 5 AN: 53414

Middle Eastern (MID) AF: 0.000347 AC: 2 AN: 5768

European-Non Finnish (NFE) AF: 0.000186 AC: 207 AN: 1112008

Other (OTH) AF: 0.00141 AC: 85 AN: 60394

GnomAD4 genome AF: 0.000722 AC: 110 AN: 152334 Hom.: 0 Cov.: 32 AF XY: 0.000832 AC XY: 62 AN XY: 74502

African (AFR) AF: 0.0000481 AC: 2 AN: 41562

American (AMR) AF: 0.00 AC: 0 AN: 15300

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.00289 AC: 15 AN: 5188

South Asian (SAS) AF: 0.0141 AC: 68 AN: 4830

European-Finnish (FIN) AF: 0.000188 AC: 2 AN: 10628

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.000323 AC: 22 AN: 68034

Other (OTH) AF: 0.000473 AC: 1 AN: 2116

Alfa AF: 0.000399 Hom.: 0

Bravo AF: 0.000366

TwinsUK AF: 0.00 AC: 0

ALSPAC AF: 0.000519 AC: 2

ESP6500AA AF: 0.000227 AC: 1

ESP6500EA AF: 0.000116 AC: 1

ExAC AF: 0.00234 AC: 284

Asia WGS AF: 0.0110 AC: 37 AN: 3478

EpiCase AF: 0.000382

EpiControl AF: 0.000119

ClinVar

ClinVar submissions

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
-	-	4	not provided (4)
-	-	3	not specified (3)
-	1	1	Type 2 diabetes mellitus (2)
-	-	1	Familial hyperinsulinism (1)
-	-	1	Maturity-onset diabetes of the young (1)
-	-	1	Maturity-onset diabetes of the young type 1 (2)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.069
BayesDel_addAF	Benign	-0.21	T
BayesDel_noAF	Uncertain	-0.060
CADD	Benign	14
DANN	Benign	0.91
DEOGEN2	Benign	0.23	T
Eigen	Benign	-1.1
Eigen_PC	Benign	-1.0
FATHMM_MKL	Benign	0.50	N
LIST_S2	Benign	0.79	T
MetaRNN	Benign	0.0076	T
MetaSVM	Benign	-0.46	T
MutationAssessor	Benign	0.90	L
PhyloP100		1.2
PrimateAI	Benign	0.27	T
PROVEAN	Benign	-0.23	N
REVEL	Uncertain	0.54
Sift	Benign	0.49	T
Sift4G	Benign	0.30	T
Polyphen		0.0010	B
Vest4		0.15
MVP		0.97
MPC		0.23
ClinPred		0.0069	T
GERP RS		-3.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.074
gMVP		0.19
Mutation Taster		=99/1	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs142204928; hg19: chr20-43043159; COSMIC: COSV105143902;