4-154590672-T-C

Variant names:

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBA1

The NM_021871.4(FGA):c.16A>G(p.Ile6Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00281 in 1,557,848 control chromosomes in the GnomAD database, including 193 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.0035 ( 17 hom., cov: 32)

Exomes 𝑓: 0.0027 ( 176 hom. )

Consequence

FGA
NM_021871.4 missense

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:5

Conservation

PhyloP100: -0.0180

Publications

10 publications found

Variant links:

Genes affected

FGA (HGNC:3661): (fibrinogen alpha chain) This gene encodes the alpha subunit of the coagulation factor fibrinogen, which is a component of the blood clot. Following vascular injury, the encoded preproprotein is proteolytically processed by thrombin during the conversion of fibrinogen to fibrin. Mutations in this gene lead to several disorders, including dysfibrinogenemia, hypofibrinogenemia, afibrinogenemia and renal amyloidosis. Alternative splicing results in multiple transcript variants, at least one of which encodes an isoform that undergoes proteolytic processing. [provided by RefSeq, Jan 2016]

FGA Gene-Disease associations (from GenCC):

familial dysfibrinogenemia
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Ambry Genetics, Labcorp Genetics (formerly Invitae)
congenital afibrinogenemia
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Ambry Genetics, Labcorp Genetics (formerly Invitae)
congenital fibrinogen deficiency
Inheritance: SD Classification: DEFINITIVE Submitted by: ClinGen
familial visceral amyloidosis
Inheritance: AD Classification: STRONG, MODERATE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
thrombophilia
Inheritance: AR, AD Classification: STRONG Submitted by: Genomics England PanelApp
AFib amyloidosis
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
familial hypofibrinogenemia
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

FGA links:

ENSG00000306549 (HGNC:):

ENSG00000306549 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0013471544).

BP6

Variant 4-154590672-T-C is Benign according to our data. Variant chr4-154590672-T-C is described in ClinVar as Benign. ClinVar VariationId is 347823.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BA1

GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.0796 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FGA	NM_021871.4 link	c.16A>G	p.Ile6Val	missense_variant	Exon 1 of 5	ENST00000403106.8	NP_068657.1	P02671-2
FGA	NM_000508.5 link	c.16A>G	p.Ile6Val	missense_variant	Exon 1 of 6		NP_000499.1	P02671-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
FGA	ENST00000403106.8 link	c.16A>G	p.Ile6Val	missense_variant	Exon 1 of 5	1	NM_021871.4	ENSP00000385981.3	P02671-2
FGA	ENST00000651975.2 link	c.16A>G	p.Ile6Val	missense_variant	Exon 1 of 6			ENSP00000498441.1	P02671-1
ENSG00000306549	ENST00000819308.1 link	n.138-2256T>C		intron_variant	Intron 1 of 1

Frequencies

GnomAD3 genomes

AF:

0.00349

AC:

531

AN:

152214

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00106

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00124

Gnomad ASJ

AF:

0.00115

Gnomad EAS

AF:

0.0856

Gnomad SAS

AF:

0.000828

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.0000588

Gnomad OTH

AF:

0.00525

GnomAD2 exomes

AF:

0.00764

AC:

1264

AN:

165434

AF XY:

0.00708

show subpopulations

Gnomad AFR exome

AF:

0.00112

Gnomad AMR exome

AF:

0.000238

Gnomad ASJ exome

AF:

0.000694

Gnomad EAS exome

AF:

0.0969

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000759

Gnomad OTH exome

AF:

0.00545

GnomAD4 exome

AF:

0.00273

AC:

3837

AN:

1405516

Hom.:

176

Cov.:

AF XY:

0.00256

AC XY:

1775

AN XY:

693736

show subpopulations

African (AFR)

AF:

0.000436

AC:

AN:

32120

American (AMR)

AF:

0.000193

AC:

AN:

36246

Ashkenazi Jewish (ASJ)

AF:

0.000277

AC:

AN:

25226

East Asian (EAS)

AF:

0.0876

AC:

3204

AN:

36590

South Asian (SAS)

AF:

0.000992

AC:

AN:

79620

European-Finnish (FIN)

AF:

0.00

AC:

AN:

49734

Middle Eastern (MID)

AF:

0.000175

AC:

AN:

5704

European-Non Finnish (NFE)

AF:

0.0000379

AC:

AN:

1081940

Other (OTH)

AF:

0.00830

AC:

484

AN:

58336

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

188

376

564

752

940

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

120

180

240

300

<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:

0.00351

AC:

534

AN:

152332

Hom.:

Cov.:

AF XY:

0.00400

AC XY:

298

AN XY:

74488

show subpopulations

African (AFR)

AF:

0.00106

AC:

AN:

41578

American (AMR)

AF:

0.00124

AC:

AN:

15300

Ashkenazi Jewish (ASJ)

AF:

0.00115

AC:

AN:

3472

East Asian (EAS)

AF:

0.0862

AC:

446

AN:

5176

South Asian (SAS)

AF:

0.00104

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10624

Middle Eastern (MID)

AF:

0.00340

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000588

AC:

AN:

68032

Other (OTH)

AF:

0.00520

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.497

Heterozygous variant carriers

105

131

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

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

Alfa

AF:

0.00263

Hom.:

Bravo

AF:

0.00384

ESP6500AA

AF:

0.000682

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.00481

AC:

537

Asia WGS

AF:

0.0470

AC:

164

AN:

3478

ClinVar

Significance: Benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:3

Dec 31, 2019

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

May 05, 2021

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant is associated with the following publications: (PMID: 32877852) -

Breakthrough Genomics, Breakthrough Genomics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Congenital afibrinogenemia

Benign:1

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Familial visceral amyloidosis, Ostertag type

Benign:1

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.13

BayesDel_addAF

Benign

-0.66

BayesDel_noAF

Benign

-0.65

CADD

Benign

6.0

(source)

DANN

Benign

0.83

DEOGEN2

Benign

0.21

T;.;.

Eigen

Benign

-0.77

Eigen_PC

Benign

-0.67

FATHMM_MKL

Benign

0.34

LIST_S2

Benign

0.49

T;T;T

MetaRNN

Benign

0.0013

T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.6

L;L;.

PhyloP100

-0.018

PrimateAI

Benign

0.33

PROVEAN

Benign

-0.34

N;N;.

REVEL

Benign

0.036

Sift

Benign

0.52

T;T;.

Sift4G

Benign

0.60

T;T;T

Polyphen

0.051

B;B;.

Vest4

0.028

MVP

0.17

MPC

0.055

ClinPred

0.0016

GERP RS

0.59

PromoterAI

-0.11

Neutral

(source)

Varity_R

0.019

gMVP

0.12

Mutation Taster

=98/2

polymorphism (auto)

(source)

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

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over