dbSNP rs75848804: FGG:p.Arg401Trp (chr4-154604995-G-A) – ACMG Classification: Likely_pathogenic (8 pts)

Variant summary

Our verdict is Likely pathogenic. Variant got 8 ACMG points: 8P and 0B. PS1_ModeratePM2PP3_ModeratePP5_Moderate

The NM_021870.3(FGG):c.1201C>T(p.Arg401Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,780 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★). Another nucleotide change resulting in the same amino acid substitution has been previously reported as Likely pathogenic in UniProt. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R401G) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

FGG
NM_021870.3 missense

Scores

Clinical Significance

Pathogenic criteria provided, single submitter P:1

Conservation

PhyloP100: 3.03

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_pathogenic. Variant got 8 ACMG points.

PS1

Transcript NM_021870.3 (FGG) is affected with MISSENSE_VARIANT having same AA change as one Pathogenic present in UniProt

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.919

PP5

Variant 4-154604995-G-A is Pathogenic according to our data. Variant chr4-154604995-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 2572634.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FGG	NM_021870.3 link	c.1201C>T	p.Arg401Trp	missense_variant	Exon 9 of 9	ENST00000336098.8	NP_068656.2	P02679-1
FGG	NM_000509.6 link	c.1201C>T	p.Arg401Trp	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.1201C>T	p.Arg401Trp	missense_variant	Exon 9 of 9	2	NM_021870.3	ENSP00000336829.3		P02679-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461780

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727194

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

8.99e-7

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Hereditary spastic paraplegia 4

Pathogenic:1

Dec 05, 2022

Laboratory of Medical Genetics, National & Kapodistrian University of Athens

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

PM1, PM2, PP3, PP5 -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.81

BayesDel_addAF

Pathogenic

0.30

BayesDel_noAF

Pathogenic

0.19

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.15

.;.;T;T

Eigen

Uncertain

0.60

Eigen_PC

Uncertain

0.64

FATHMM_MKL

Uncertain

0.94

LIST_S2

Uncertain

0.93

D;D;D;D

M_CAP

Uncertain

0.16

MetaRNN

Pathogenic

0.92

D;D;D;D

MetaSVM

Uncertain

0.038

MutationAssessor

Benign

1.2

L;.;L;.

PrimateAI

Uncertain

0.66

PROVEAN

Uncertain

-2.4

N;D;N;N

REVEL

Pathogenic

0.66

Sift

Benign

0.058

T;T;T;T

Sift4G

Benign

0.23

T;T;T;T

Polyphen

1.0

D;D;D;D

Vest4

0.90

MutPred

0.80

.;Loss of catalytic residue at R409 (P = 0.0315);.;Loss of catalytic residue at R409 (P = 0.0315);

MVP

0.92

MPC

0.82

ClinPred

0.99

GERP RS

5.2

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.65

gMVP

0.92

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

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

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