Genetic Variant NM_021784.5:c.309C>A (chr20-22582933-G-T) – ACMG Classification: Benign (-9 pts)

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 0P and 9B. BP4_StrongBP7BS2

The NM_021784.5(FOXA2):c.309C>A(p.Ala103Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000118 in 1,528,402 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. A103A) has been classified as Benign.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000012 ( 0 hom. )

Consequence

FOXA2
NM_021784.5 synonymous

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.643

Publications

8 publications found

Variant links:

Genes affected

FOXA2 (HGNC:5022): (forkhead box A2) This gene encodes a member of the forkhead class of DNA-binding proteins. These hepatocyte nuclear factors are transcriptional activators for liver-specific genes such as albumin and transthyretin, and they also interact with chromatin. Similar family members in mice have roles in the regulation of metabolism and in the differentiation of the pancreas and liver. This gene has been linked to sporadic cases of maturity-onset diabetes of the young. Transcript variants encoding different isoforms have been identified for this gene. [provided by RefSeq, Oct 2008]

FOXA2 Gene-Disease associations (from GenCC):

combined pituitary hormone deficiencies, genetic form
Inheritance: AD Classification: MODERATE, SUPPORTIVE Submitted by: ClinGen, Orphanet

FOXA2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -9 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.66).

BP7

Synonymous conserved (PhyloP=-0.643 with no splicing effect.

BS2

High AC in GnomAdExome4 at 17 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein
FOXA2	NM_021784.5 link	c.309C>A	p.Ala103Ala	synonymous_variant	Exon 2 of 2	ENST00000419308.7	NP_068556.2
FOXA2	NM_153675.3 link	c.291C>A	p.Ala97Ala	synonymous_variant	Exon 3 of 3		NP_710141.1
FOXA2	XM_047440133.1 link	c.291C>A	p.Ala97Ala	synonymous_variant	Exon 3 of 3		XP_047296089.1
FOXA2	XM_047440134.1 link	c.201C>A	p.Ala67Ala	synonymous_variant	Exon 2 of 2		XP_047296090.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FOXA2	ENST00000419308.7 link	c.309C>A	p.Ala103Ala	synonymous_variant	Exon 2 of 2	1	NM_021784.5	ENSP00000400341.3
FOXA2	ENST00000377115.4 link	c.291C>A	p.Ala97Ala	synonymous_variant	Exon 3 of 3	1		ENSP00000366319.4

Frequencies

GnomAD3 genomes

AF:

0.00000658

AC:

AN:

151936

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000242

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:

0.0000124

AC:

AN:

1376466

Hom.:

Cov.:

AF XY:

0.0000118

AC XY:

AN XY:

680286

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

29664

American (AMR)

AF:

0.00

AC:

AN:

32460

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

23400

East Asian (EAS)

AF:

0.00

AC:

AN:

35214

South Asian (SAS)

AF:

0.00

AC:

AN:

76908

European-Finnish (FIN)

AF:

0.00

AC:

AN:

41020

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4996

European-Non Finnish (NFE)

AF:

0.0000158

AC:

AN:

1075738

Other (OTH)

AF:

0.00

AC:

AN:

57066

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.507

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00000658

AC:

AN:

151936

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74214

show subpopulations

African (AFR)

AF:

0.0000242

AC:

AN:

41396

American (AMR)

AF:

0.00

AC:

AN:

15262

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5148

South Asian (SAS)

AF:

0.00

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10568

Middle Eastern (MID)

AF:

0.00

AC:

AN:

314

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67952

Other (OTH)

AF:

0.00

AC:

AN:

2088

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.66

CADD

Benign

4.1

(source)

DANN

Benign

0.90

PhyloP100

-0.64

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.8

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over