rs267606792

Variant names:

• chrX-139560772-G-A
• NM_000133.4:c.755G>A

Your query was ambiguous. Multiple possible variants found:

• chrX-139560772-G-A
• chrX-139560772-G-C

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PS1_Moderate PM1 PM2 PP3_Strong PP5_Moderate

The NM_000133.4(F9):​c.755G>A​(p.Cys252Tyr) variant causes a missense change involving the alteration of a conserved nucleotide. 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 Pathogenic (★). Another nucleotide change resulting in the same amino acid substitution has been previously reported as Likely pathogenic in UniProt.

• Frequency: Genomes: not found (cov: 23)
• Consequence: F9 NM_000133.4 missense
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 9.39

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]

ACMG classification

Verdict is Pathogenic. Variant got 12 ACMG points.

• PS1: Transcript NM_000133.4 (F9) is affected with MISSENSE_VARIANT having same AA change as one Pathogenic present in UniProt
• PM1: In a chain Coagulation factor IXa heavy chain (size 234) in uniprot entity FA9_HUMAN there are 51 pathogenic changes around while only 0 benign (100%) in NM_000133.4
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.996
• PP5: Variant X-139560772-G-A is Pathogenic according to our data. Variant chrX-139560772-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 2138739.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
F9	NM_000133.4	c.755G>A	p.Cys252Tyr	missense_variant	Exon 7 of 8	ENST00000218099.7	NP_000124.1
F9	NM_001313913.2	c.641G>A	p.Cys214Tyr	missense_variant	Exon 6 of 7		NP_001300842.1
F9	XM_005262397.5	c.626G>A	p.Cys209Tyr	missense_variant	Exon 6 of 7		XP_005262454.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
F9	ENST00000218099.7	c.755G>A	p.Cys252Tyr	missense_variant	Exon 7 of 8	1	NM_000133.4	ENSP00000218099.2
F9	ENST00000394090.2	c.641G>A	p.Cys214Tyr	missense_variant	Exon 6 of 7	1		ENSP00000377650.2
F9	ENST00000643157.1	n.1422G>A		non_coding_transcript_exon_variant	Exon 5 of 7

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 23

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

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

Jun 29, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces cysteine, which is neutral and slightly polar, with tyrosine, which is neutral and polar, at codon 252 of the F9 protein (p.Cys252Tyr). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individuals with hemophilia B (PMID: 22639855, 27109384). This variant is also known as 206, C>Y. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt F9 protein function. This variant disrupts the p.Cys252 amino acid residue in F9. Other variant(s) that disrupt this residue have been observed in individuals with F9-related conditions (PMID: 22639855, 27109384, 28752769), which suggests that this may be a clinically significant amino acid residue. For these reasons, this variant has been classified as Pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.74	D
BayesDel_noAF	Pathogenic	0.83
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.97	D;.
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.86	D;D
M_CAP	Pathogenic	0.89	D
MetaRNN	Pathogenic	1.0	D;D
MetaSVM	Pathogenic	1.0	D
MutationAssessor	Pathogenic	4.5	H;.
PrimateAI	Uncertain	0.64	T
PROVEAN	Pathogenic	-11	D;D
REVEL	Pathogenic	0.99
Sift	Uncertain	0.0010	D;D
Sift4G	Pathogenic	0.0	D;D
Polyphen		1.0	D;.
Vest4		0.93
MutPred		0.99		Gain of sheet (P = 0.0827);.;
MVP		1.0
MPC		2.1
ClinPred		1.0	D
GERP RS		5.8
Varity_R		0.99
gMVP		1.0

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

No publications associated with this variant yet.

Other links and lift over

hg19: chrX-138642931;