rs121909609

chr4-154589507-G-A

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM1 PM2 PP3_Moderate

The NM_021871.4(FGA):c.110C>T(p.Pro37Leu) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as other (no stars). Another nucleotide change resulting in same amino acid change has been previously reported as Likely benignin UniProt.

• Frequency: Genomes: not found (cov: 32)
• Consequence: FGA NM_021871.4 missense
• Clinical Significance: other no assertion criteria provided O:1
• Conservation: PhyloP100: 6.58

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]

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PM1: In a hotspot region, there are 4 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 3 uncertain in NM_021871.4
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.895

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FGA	NM_021871.4	c.110C>T	p.Pro37Leu	missense_variant	2/5	ENST00000403106.8
FGA	NM_000508.5	c.110C>T	p.Pro37Leu	missense_variant	2/6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FGA	ENST00000403106.8	c.110C>T	p.Pro37Leu	missense_variant	2/5	1	NM_021871.4
FGA	ENST00000651975.2	c.110C>T	p.Pro37Leu	missense_variant	2/6			P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: other

Submissions summary: Other:1

Revision: no assertion criteria provided

Submissions by phenotype

FIBRINOGEN KYOTO 2 Other:1

other, no assertion criteria provided

literature only

OMIM

Sep 29, 2014

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.38
BayesDel_addAF	Pathogenic	0.29	D
BayesDel_noAF	Pathogenic	0.18
Cadd	Pathogenic	27
Dann	Uncertain	1.0
DEOGEN2	Pathogenic	0.85	D;.;.
Eigen	Pathogenic	0.68
Eigen_PC	Uncertain	0.64
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Benign	0.85	T;T;T
M_CAP	Uncertain	0.13	D
MetaRNN	Pathogenic	0.90	D;D;D
MetaSVM	Uncertain	-0.096	T
MutationAssessor	Uncertain	2.7	M;M;.
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.55	T
PROVEAN	Pathogenic	-5.9	D;D;.
REVEL	Uncertain	0.42
Sift	Uncertain	0.0010	D;D;.
Sift4G	Uncertain	0.0060	D;D;D
Polyphen		1.0	D;D;.
Vest4		0.73
MutPred		0.86		Loss of disorder (P = 0.0163);Loss of disorder (P = 0.0163);Loss of disorder (P = 0.0163);
MVP		0.79
MPC		0.26
ClinPred		1.0	D
GERP RS		5.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.62
gMVP		0.48

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

Other links and lift over

dbSNP: rs121909609; hg19: chr4-155510659;