chrX-139530790-C-G

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BP4

The NM_000133.4(F9):c.26C>G(p.Ala9Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000912 in 1,096,898 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (no stars). Synonymous variant affecting the same amino acid position (i.e. A9A) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 24)

Exomes 𝑓: 9.1e-7 ( 0 hom. 0 hem. )

Consequence

F9
NM_000133.4 missense

Scores

Clinical Significance

Uncertain significance no assertion criteria provided U:1

Conservation

PhyloP100: 2.92

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 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.31988698).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
F9	NM_000133.4 link	c.26C>G	p.Ala9Gly	missense_variant	Exon 1 of 8	ENST00000218099.7	NP_000124.1	P00740-1
F9	NM_001313913.2 link	c.26C>G	p.Ala9Gly	missense_variant	Exon 1 of 7		NP_001300842.1	P00740-2
F9	XM_005262397.5 link	c.26C>G	p.Ala9Gly	missense_variant	Exon 1 of 7		XP_005262454.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
F9	ENST00000218099.7 link	c.26C>G	p.Ala9Gly	missense_variant	Exon 1 of 8	1	NM_000133.4	ENSP00000218099.2	P00740-1
F9	ENST00000394090.2 link	c.26C>G	p.Ala9Gly	missense_variant	Exon 1 of 7	1		ENSP00000377650.2	P00740-2
F9	ENST00000479617.2 link	n.33C>G		non_coding_transcript_exon_variant	Exon 1 of 4	5

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000218

AC:

AN:

183089

Hom.:

AF XY:

0.0000296

AC XY:

AN XY:

67679

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000289

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

9.12e-7

AC:

AN:

1096898

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

362374

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000331

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Bravo

AF:

0.00000378

ExAC

AF:

0.0000412

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: no assertion criteria provided

LINK: link

Submissions by phenotype

F9-related disorder

Uncertain:1

Jun 20, 2024

PreventionGenetics, part of Exact Sciences

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

The F9 c.26C>G variant is predicted to result in the amino acid substitution p.Ala9Gly. This variant has been reported in an individual with Hemophilia B (Huang et al 2020. PubMed ID: 32875744). This variant is reported in 0.029% of alleles in individuals of East Asian descent in gnomAD. At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.10

BayesDel_addAF

Benign

-0.10

BayesDel_noAF

Uncertain

-0.080

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.51

D;.

FATHMM_MKL

Uncertain

0.87

LIST_S2

Benign

0.77

T;T

M_CAP

Uncertain

0.14

MetaRNN

Benign

0.32

T;T

MetaSVM

Uncertain

0.27

MutationAssessor

Benign

1.9

L;L

PrimateAI

Benign

0.42

PROVEAN

Benign

-1.3

N;N

REVEL

Uncertain

0.40

Sift

Uncertain

0.0040

D;D

Sift4G

Uncertain

0.051

T;D

Polyphen

0.14

B;.

Vest4

0.50

MutPred

0.29

Gain of disorder (P = 0.0788);Gain of disorder (P = 0.0788);

MVP

0.94

MPC

0.25

ClinPred

0.25

GERP RS

5.1

Varity_R

0.34

gMVP

0.74

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