rs137852394

Variant names:

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PM1PM2PM5PP3_StrongPP5_Very_Strong

The NM_000132.4(F8):c.541G>A(p.Val181Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000911 in 1,098,192 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V181E) has been classified as Likely pathogenic.

Frequency

Genomes: not found (cov: 23)

Exomes 𝑓: 9.1e-7 ( 0 hom. 0 hem. )

Consequence

F8
NM_000132.4 missense

Scores

Clinical Significance

Pathogenic criteria provided, multiple submitters, no conflicts P:7

Conservation

PhyloP100: 1.92

Variant links:

Genes affected

F8 (HGNC:3546): (coagulation factor VIII) This gene encodes coagulation factor VIII, which participates in the intrinsic pathway of blood coagulation; factor VIII is a cofactor for factor IXa which, in the presence of Ca+2 and phospholipids, converts factor X to the activated form Xa. This gene produces two alternatively spliced transcripts. Transcript variant 1 encodes a large glycoprotein, isoform a, which circulates in plasma and associates with von Willebrand factor in a noncovalent complex. This protein undergoes multiple cleavage events. Transcript variant 2 encodes a putative small protein, isoform b, which consists primarily of the phospholipid binding domain of factor VIIIc. This binding domain is essential for coagulant activity. Defects in this gene results in hemophilia A, a common recessive X-linked coagulation disorder. [provided by RefSeq, Jul 2008]

F8 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 18 ACMG points.

PM1

In a disulfide_bond (size 26) in uniprot entity FA8_HUMAN there are 10 pathogenic changes around while only 0 benign (100%) in NM_000132.4

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chrnull-null-null-null is described in UniProt as null.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.941

PP5

Variant X-154992996-C-T is Pathogenic according to our data. Variant chrX-154992996-C-T is described in ClinVar as [Pathogenic]. Clinvar id is 10177.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chrX-154992996-C-T is described in Lovd as [Likely_pathogenic]. Variant chrX-154992996-C-T is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
F8	NM_000132.4 link	c.541G>A	p.Val181Met	missense_variant	Exon 4 of 26	ENST00000360256.9	NP_000123.1	P00451-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
F8	ENST00000360256.9 link	c.541G>A	p.Val181Met	missense_variant	Exon 4 of 26	1	NM_000132.4	ENSP00000353393.4		P00451-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

9.11e-7

AC:

AN:

1098192

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

363552

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:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000119

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Bravo

AF:

0.0000453

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:7

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Hereditary factor VIII deficiency disease

Pathogenic:3

ISTH-SSC Genomics in Thrombosis and Hemostasis, KU Leuven, Center for Molecular and Vascular Biology

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: research

- -

Jan 01, 1992

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Jan 29, 2025

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: F8 c.541G>A (p.Val181Met) results in a conservative amino acid change located in the multicopper oxidase domian (IPR011707) of the encoded protein sequence. Three of five in-silico tools predict a damaging effect of the variant on protein function. The variant was absent in 183441 control chromosomes. c.541G>A has been reported in the literature in multiple individuals affected with Factor VIII Deficiency (Hemophilia A) (e.g., Diamond_1992, Downes_2019, Green_2008). These data indicate that the variant is very likely to be associated with disease. The following publications have been ascertained in the context of this evaluation (PMID: 1301932, 31064749, 18691168). ClinVar contains an entry for this variant (Variation ID: 10177). Based on the evidence outlined above, the variant was classified as pathogenic. -

not provided

Pathogenic:2

Genome Diagnostics Laboratory, University Medical Center Utrecht

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

F8-related disorder

Pathogenic:1

Dec 05, 2022

PreventionGenetics, part of Exact Sciences

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The F8 c.541G>A variant is predicted to result in the amino acid substitution p.Val181Met. This variant is also described using legacy nomenclature as p.Val162Met and has been reported in patients with hemophilia A (Diamond et al. 1992. PubMed ID: 1301932; Downes et al. 2019. PubMed ID: 31064749. Table S3; Green et al. 2008. PubMed ID: 18691168. Table S1; F8 database: http://www.factorviii-db.org/index.php). This variant has not been reported in a large population database (http://gnomad.broadinstitute.org), indicating this variant is rare. This variant is interpreted as pathogenic. -

Hereditary factor IX deficiency disease

Pathogenic:1

Feb 01, 2019

NIHR Bioresource Rare Diseases, University of Cambridge

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: research

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.27

BayesDel_addAF

Pathogenic

0.41

BayesDel_noAF

Pathogenic

0.34

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Pathogenic

0.90

D;D

FATHMM_MKL

Benign

0.71

LIST_S2

Uncertain

0.92

D;D

M_CAP

Pathogenic

0.68

MetaRNN

Pathogenic

0.94

D;D

MetaSVM

Pathogenic

0.87

MutationAssessor

Uncertain

2.7

M;.

PrimateAI

Uncertain

0.54

PROVEAN

Benign

-1.9

N;N

REVEL

Pathogenic

0.82

Sift

Uncertain

0.0010

D;D

Sift4G

Uncertain

0.0050

D;.

Polyphen

1.0

D;D

Vest4

0.73

MutPred

0.77

Loss of catalytic residue at V181 (P = 0.0415);.;

MVP

0.99

MPC

1.7

ClinPred

0.95

GERP RS

4.7

Varity_R

0.88

gMVP

0.97

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

Other links and lift over