NM_000133.4:c.769G>A

Variant names:

Variant summary

Our verdict is Benign. The variant received -8 ACMG points: 0P and 8B. BA1

This summary comes from the ClinGen Evidence Repository: The c.769G>A variant in F9 is a missense variant predicted to cause substitution of Valine by Isoleucine at amino acid 257 (p.Val257Ile). The highest population minor allele frequency in gnomAD v2.1.1 is 0.001548 (23/14862 alleles) in the East Asian population a grpmax FAF for exomes = 0.001015 and genomes = 0.0003535, which is higher than the ClinGen Coagulation Factor Deficiency VCEP threshold (>=0.0000556) for BA1, and therefore meets this criterion (BA1). In summary, this variant meets the criteria to be classified as Benign for Hemophilia B based on the ACMG/AMP criteria applied, as specified by the ClinGen Coagulation Factor Deficiency VCEP for F9 (version 1.0.0, released 10/5/2023): BA1. LINK:https://erepo.genome.network/evrepo/ui/classification/CA10529834/MONDO:0010604/080

Frequency

Genomes: 𝑓 0.00011 ( 0 hom., 2 hem., cov: 23)

Exomes 𝑓: 0.00020 ( 1 hom. 83 hem. )

Consequence

F9
NM_000133.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:4

Conservation

PhyloP100: -0.992

Publications

2 publications found

Variant links:

Genes affected

F9 (HGNC:3551): (coagulation factor IX) This gene encodes vitamin K-dependent coagulation factor IX that circulates in the blood as an inactive zymogen. This factor is converted to an active form by factor XIa, which excises the activation peptide and thus generates a heavy chain and a light chain held together by one or more disulfide bonds. The role of this activated factor IX in the blood coagulation cascade is to activate factor X to its active form through interactions with Ca+2 ions, membrane phospholipids, and factor VIII. Alterations of this gene, including point mutations, insertions and deletions, cause factor IX deficiency, which is a recessive X-linked disorder, also called hemophilia B or Christmas disease. Alternative splicing results in multiple transcript variants encoding different isoforms that may undergo similar proteolytic processing. [provided by RefSeq, Sep 2015]

F9 Gene-Disease associations (from GenCC):

hemophilia B
Inheritance: XL Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), ClinGen
mild hemophilia B
Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet
moderately severe hemophilia B
Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet
severe hemophilia B
Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet
symptomatic form of hemophilia B in female carriers
Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet
thrombophilia, X-linked, due to factor 9 defect
Inheritance: XL Classification: LIMITED Submitted by: ClinGen

F9 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -8 ACMG points.

BA1

For more information check the summary or visit ClinGen Evidence Repository.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000133.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	F9	NM_000133.4	MANE Select	c.769G>A	p.Val257Ile	missense	Exon 7 of 8	NP_000124.1
	F9	NM_001313913.2		c.655G>A	p.Val219Ile	missense	Exon 6 of 7	NP_001300842.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
F9	ENST00000218099.7	TSL:1 MANE Select	c.769G>A	p.Val257Ile	missense	Exon 7 of 8	ENSP00000218099.2
F9	ENST00000394090.2	TSL:1	c.655G>A	p.Val219Ile	missense	Exon 6 of 7	ENSP00000377650.2
F9	ENST00000643157.1		n.1436G>A		non_coding_transcript_exon	Exon 5 of 7

Frequencies

GnomAD3 genomes

AF:

0.000107

AC:

AN:

111714

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000163

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000951

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00112

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.000167

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.000664

GnomAD2 exomes

AF:

0.000125

AC:

AN:

183446

AF XY:

0.000103

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000365

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00152

Gnomad FIN exome

AF:

0.0000625

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000200

AC:

219

AN:

1097324

Hom.:

Cov.:

AF XY:

0.000229

AC XY:

AN XY:

362734

show subpopulations

African (AFR)

AF:

0.0000758

AC:

AN:

26382

American (AMR)

AF:

0.0000284

AC:

AN:

35205

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19377

East Asian (EAS)

AF:

0.00659

AC:

199

AN:

30192

South Asian (SAS)

AF:

0.00

AC:

AN:

54123

European-Finnish (FIN)

AF:

0.0000741

AC:

AN:

40507

Middle Eastern (MID)

AF:

0.000242

AC:

AN:

4132

European-Non Finnish (NFE)

AF:

0.00000951

AC:

AN:

841334

Other (OTH)

AF:

0.000109

AC:

AN:

46072

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.476

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome 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

GnomAD4 genome

AF:

0.000107

AC:

AN:

111765

Hom.:

Cov.:

AF XY:

0.0000589

AC XY:

AN XY:

33957

show subpopulations

African (AFR)

AF:

0.000162

AC:

AN:

30819

American (AMR)

AF:

0.0000950

AC:

AN:

10530

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

2643

East Asian (EAS)

AF:

0.00112

AC:

AN:

3559

South Asian (SAS)

AF:

0.00

AC:

AN:

2637

European-Finnish (FIN)

AF:

0.000167

AC:

AN:

5987

Middle Eastern (MID)

AF:

0.00

AC:

AN:

218

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

53163

Other (OTH)

AF:

0.000656

AC:

AN:

1525

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.485

Heterozygous variant carriers

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:

0.000185

Hom.:

Bravo

AF:

0.000106

ExAC

AF:

0.000165

AC:

ClinVar

ClinVar submissions as Germline

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

Hereditary factor IX deficiency disease (3)

F9-related disorder (1)

Hereditary factor IX deficiency disease;C2749016:Thrombophilia, X-linked, due to factor 9 defect (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.060

BayesDel_addAF

Benign

-0.28

BayesDel_noAF

Benign

-0.20

CADD

Benign

0.0030

(source)

DANN

Benign

0.61

DEOGEN2

Benign

0.39

FATHMM_MKL

Benign

0.0087

LIST_S2

Benign

0.81

M_CAP

Benign

0.069

MetaRNN

Benign

0.026

MetaSVM

Benign

-0.85

MutationAssessor

Benign

-1.1

PhyloP100

-0.99

PrimateAI

Benign

0.25

PROVEAN

Benign

0.81

REVEL

Uncertain

0.48

Sift

Benign

0.49

Sift4G

Benign

0.41

Polyphen

0.0

Vest4

0.40

MVP

0.98

MPC

0.52

ClinPred

0.020

GERP RS

-5.8

Varity_R

0.051

gMVP

0.90

Mutation Taster

=93/7

polymorphism

(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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over