X-139561836-G-A

Position:

• chrX-139561836-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 4P and 1B. PM1 PM2 BP4

The NM_000133.4(F9):​c.1151G>A​(p.Arg384Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 13/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency: Genomes: not found (cov: 22)
• Consequence: F9 NM_000133.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 1.50

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 Uncertain_significance. Variant got 3 ACMG points.

• PM1: In a domain Peptidase S1 (size 232) 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
• BP4: Computational evidence support a benign effect (MetaRNN=0.34931195).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
F9	NM_000133.4	c.1151G>A	p.Arg384Gln	missense_variant	8/8	ENST00000218099.7	NP_000124.1
F9	NM_001313913.2	c.1037G>A	p.Arg346Gln	missense_variant	7/7		NP_001300842.1
F9	XM_005262397.5	c.1022G>A	p.Arg341Gln	missense_variant	7/7		XP_005262454.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
F9	ENST00000218099.7	c.1151G>A	p.Arg384Gln	missense_variant	8/8	1	NM_000133.4	ENSP00000218099	P1
F9	ENST00000394090.2	c.1037G>A	p.Arg346Gln	missense_variant	7/7	1		ENSP00000377650
F9	ENST00000643157.1	n.1723+95G>A		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes Cov.: 22

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 22

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 27, 2017

- -

Thrombus Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

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

-

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.087
BayesDel_addAF	Benign	-0.070	T
BayesDel_noAF	Benign	-0.34
CADD	Benign	18
DANN	Uncertain	0.99
DEOGEN2	Benign	0.40	T;.
FATHMM_MKL	Benign	0.055	N
LIST_S2	Benign	0.83	T;T
M_CAP	Pathogenic	0.57	D
MetaRNN	Benign	0.35	T;T
MetaSVM	Benign	-0.78	T
MutationAssessor	Benign	0.36	N;.
MutationTaster	Benign	1.0	N;N
PrimateAI	Benign	0.30	T
PROVEAN	Benign	0.14	N;N
REVEL	Benign	0.17
Sift	Benign	0.35	T;T
Sift4G	Benign	0.56	T;T
Polyphen		0.0060	B;.
Vest4		0.14
MutPred		0.55		Loss of helix (P = 0.1299);.;
MVP		0.90
MPC		0.76
ClinPred		0.15	T
GERP RS		2.9
Varity_R		0.34
gMVP		0.90

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

Other links and lift over

dbSNP: rs137852283; hg19: chrX-138643995;