Genetic Variant NM_021870.3:c.1285G>C (chr4-154604911-C-G) – ACMG Classification: Likely_benign (-4 pts)

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 2P and 6B. PM2BP4_ModerateBS1

The NM_021870.3(FGG):c.1285G>C(p.Gly429Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000116 in 1,461,806 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.000012 ( 0 hom. )

Consequence

FGG
NM_021870.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 2.40

Variant links:

Genes affected

FGG (HGNC:3694): (fibrinogen gamma chain) The protein encoded by this gene is the gamma component of fibrinogen, a blood-borne glycoprotein comprised of three pairs of nonidentical polypeptide chains. Following vascular injury, fibrinogen is cleaved by thrombin to form fibrin which is the most abundant component of blood clots. In addition, various cleavage products of fibrinogen and fibrin regulate cell adhesion and spreading, display vasoconstrictor and chemotactic activities, and are mitogens for several cell types. Mutations in this gene lead to several disorders, including dysfibrinogenemia, hypofibrinogenemia and thrombophilia. Alternative splicing results in transcript variants encoding different isoforms. [provided by RefSeq, Aug 2015]

FGG links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.17418623).

BS1

Variant frequency is greater than expected in population sas. gnomad4_exome allele frequency = 0.0000116 (17/1461806) while in subpopulation SAS AF= 0.000174 (15/86256). AF 95% confidence interval is 0.000107. There are 0 homozygotes in gnomad4_exome. There are 14 alleles in male gnomad4_exome subpopulation. Median coverage is 34. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FGG	NM_021870.3 link	c.1285G>C	p.Gly429Arg	missense_variant	Exon 9 of 9	ENST00000336098.8	NP_068656.2	P02679-1
FGG	NM_000509.6 link	c.1285G>C	p.Gly429Arg	missense_variant	Exon 9 of 10		NP_000500.2	P02679-2A0A140VJJ6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FGG	ENST00000336098.8 link	c.1285G>C	p.Gly429Arg	missense_variant	Exon 9 of 9	2	NM_021870.3	ENSP00000336829.3		P02679-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000239

AC:

AN:

251408

Hom.:

AF XY:

0.0000221

AC XY:

AN XY:

135882

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000544

Gnomad SAS exome

AF:

0.000163

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000116

AC:

AN:

1461806

Hom.:

Cov.:

AF XY:

0.0000193

AC XY:

AN XY:

727210

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.000174

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Bravo

AF:

0.00000378

ExAC

AF:

0.0000165

AC:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.25

BayesDel_addAF

Benign

-0.15

BayesDel_noAF

Benign

-0.19

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.45

.;.;T;T

Eigen

Benign

-0.10

Eigen_PC

Benign

0.12

FATHMM_MKL

Uncertain

0.94

LIST_S2

Uncertain

0.88

D;D;D;D

M_CAP

Benign

0.035

MetaRNN

Benign

0.17

T;T;T;T

MetaSVM

Benign

-0.90

MutationAssessor

Benign

0.0

N;.;N;.

PrimateAI

Benign

0.48

PROVEAN

Benign

-2.1

N;N;N;N

REVEL

Benign

0.22

Sift

Benign

0.035

D;D;D;D

Sift4G

Uncertain

0.021

D;D;D;D

Polyphen

0.16

B;B;B;B

Vest4

0.54

MutPred

0.21

.;Gain of MoRF binding (P = 0.0224);.;Gain of MoRF binding (P = 0.0224);

MVP

0.71

MPC

0.28

ClinPred

0.35

GERP RS

5.7

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.39

gMVP

0.81

Splicing

Name

Calibrated prediction

Score

Prediction

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

Computational scores

Splicing

Publications

LitVar

Other links and lift over