dbSNP rs4149751: F9:p.Thr461Pro (chrX-139562066-A-C) – ACMG Classification: Benign (-19 pts)

Variant summary

Our verdict is Benign. The variant received -19 ACMG points: 1P and 20B. PP2BP4_StrongBP6_Very_StrongBS1BS2

The NM_000133.4(F9):c.1381A>C(p.Thr461Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000277 in 1,207,222 control chromosomes in the GnomAD database, including 3 homozygotes. There are 99 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T461A) has been classified as Uncertain significance. The gene F9 is included in the ClinGen Criteria Specification Registry.

Frequency

Genomes: 𝑓 0.0013 ( 1 hom., 43 hem., cov: 23)

Exomes 𝑓: 0.00018 ( 2 hom. 56 hem. )

Consequence

F9
NM_000133.4 missense

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:4

Conservation

PhyloP100: 2.15

Publications

4 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

Specifications for F9 are available in the ClinGen Criteria Specification Registry and recommended for reference when assigning criteria.

Classification was made for transcript

Our verdict: Benign. The variant received -19 ACMG points.

PP2

Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 162 curated pathogenic missense variants (we use a threshold of 10). The gene has 21 curated benign missense variants. Gene score misZ: 2.1809 (below the threshold of 3.09). Trascript score misZ: NaN (below the threshold of 3.09). GenCC associations: The gene is linked to symptomatic form of hemophilia B in female carriers, severe hemophilia B, thrombophilia, X-linked, due to factor 9 defect, hemophilia B, mild hemophilia B, moderately severe hemophilia B.

BP4

Computational evidence support a benign effect (MetaRNN=0.0071655214).

BP6

Variant X-139562066-A-C is Benign according to our data. Variant chrX-139562066-A-C is described in ClinVar as Benign. ClinVar VariationId is 368004.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00128 (143/111949) while in subpopulation AFR AF = 0.00416 (128/30806). AF 95% confidence interval is 0.00357. There are 1 homozygotes in GnomAd4. There are 43 alleles in the male GnomAd4 subpopulation. Median coverage is 23. This position passed quality control check.

BS2

High Hemizygotes in GnomAd4 at 43 XL gene

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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	F9	NM_000133.4	MANE Select	c.1381A>C	p.Thr461Pro	missense	Exon 8 of 8	NP_000124.1	P00740-1
	F9	NM_001313913.2		c.1267A>C	p.Thr423Pro	missense	Exon 7 of 7	NP_001300842.1	P00740-2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
F9	ENST00000218099.7	TSL:1 MANE Select	c.1381A>C	p.Thr461Pro	missense	Exon 8 of 8	ENSP00000218099.2	P00740-1
F9	ENST00000394090.2	TSL:1	c.1267A>C	p.Thr423Pro	missense	Exon 7 of 7	ENSP00000377650.2	P00740-2
F9	ENST00000643157.1		n.1723+325A>C		intron	N/A

Frequencies

GnomAD3 genomes

AF:

0.00125

AC:

140

AN:

111895

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00407

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00104

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000188

Gnomad OTH

AF:

0.00200

GnomAD2 exomes

AF:

0.000374

AC:

AN:

181976

AF XY:

0.000238

show subpopulations

Gnomad AFR exome

AF:

0.00467

Gnomad AMR exome

AF:

0.000256

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000723

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000223

GnomAD4 exome

AF:

0.000175

AC:

192

AN:

1095273

Hom.:

Cov.:

AF XY:

0.000155

AC XY:

AN XY:

360779

show subpopulations

African (AFR)

AF:

0.00547

AC:

144

AN:

26344

American (AMR)

AF:

0.000369

AC:

AN:

35185

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19371

East Asian (EAS)

AF:

0.00

AC:

AN:

30195

South Asian (SAS)

AF:

0.0000740

AC:

AN:

54026

European-Finnish (FIN)

AF:

0.00

AC:

AN:

40436

Middle Eastern (MID)

AF:

0.000727

AC:

AN:

4127

European-Non Finnish (NFE)

AF:

0.0000107

AC:

AN:

839572

Other (OTH)

AF:

0.000413

AC:

AN:

46017

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.470

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:

0.00128

AC:

143

AN:

111949

Hom.:

Cov.:

AF XY:

0.00126

AC XY:

AN XY:

34125

show subpopulations

African (AFR)

AF:

0.00416

AC:

128

AN:

30806

American (AMR)

AF:

0.00104

AC:

AN:

10591

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

2650

East Asian (EAS)

AF:

0.00

AC:

AN:

3553

South Asian (SAS)

AF:

0.00

AC:

AN:

2667

European-Finnish (FIN)

AF:

0.00

AC:

AN:

6082

Middle Eastern (MID)

AF:

0.00

AC:

AN:

219

European-Non Finnish (NFE)

AF:

0.0000188

AC:

AN:

53179

Other (OTH)

AF:

0.00197

AC:

AN:

1520

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.492

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:

0.000379

Hom.:

Bravo

AF:

0.00139

ESP6500AA

AF:

0.00235

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000453

AC:

ClinVar

ClinVar submissions

Significance:Benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

Hereditary factor IX deficiency disease (2)

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

not provided (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.099

BayesDel_addAF

Benign

-0.27

BayesDel_noAF

Benign

-0.16

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.50

FATHMM_MKL

Benign

0.14

LIST_S2

Benign

0.68

MetaRNN

Benign

0.0072

MetaSVM

Uncertain

0.055

MutationAssessor

Benign

1.6

PhyloP100

2.2

PrimateAI

Uncertain

0.51

PROVEAN

Benign

-1.5

REVEL

Uncertain

0.31

Sift

Uncertain

0.0030

Sift4G

Uncertain

0.0070

Polyphen

1.0

Vest4

0.076

MVP

0.82

MPC

1.8

ClinPred

0.039

GERP RS

2.9

Varity_R

0.65

gMVP

0.94

Mutation Taster

=83/17

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