Genetic Variant TFPI:p.Asn108Lys (chr2-187488371-A-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_006287.6(TFPI):c.324T>A(p.Asn108Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000661 in 151,378 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Consequence

TFPI
NM_006287.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.696

Variant links:

Genes affected

TFPI (HGNC:11760): (tissue factor pathway inhibitor) This gene encodes a Kunitz-type serine protease inhibitor that regulates the tissue factor (TF)-dependent pathway of blood coagulation. The coagulation process initiates with the formation of a factor VIIa-TF complex, which proteolytically activates additional proteases (factors IX and X) and ultimately leads to the formation of a fibrin clot. The product of this gene inhibits the activated factor X and VIIa-TF proteases in an autoregulatory loop. Inhibition of the encoded protein restores hemostasis in animal models of hemophilia. This gene encodes multiple protein isoforms that differ in their inhibitory activity, specificity and cellular localization. [provided by RefSeq, Jul 2016]

TFPI links:

CALCRL-AS1 (HGNC:55863): (CALCRL and TFPI antisense RNA 1)

CALCRL-AS1 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.06124282).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TFPI	NM_006287.6 link	c.324T>A	p.Asn108Lys	missense_variant	Exon 4 of 8	ENST00000233156.9	NP_006278.1	P10646-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TFPI	ENST00000233156.9 link	c.324T>A	p.Asn108Lys	missense_variant	Exon 4 of 8	1	NM_006287.6	ENSP00000233156.3		P10646-1

Frequencies

GnomAD3 genomes

AF:

0.00000661

AC:

AN:

151378

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

Cov.:

GnomAD4 genome

AF:

0.00000661

AC:

AN:

151378

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

73944

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

May 21, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.324T>A (p.N108K) alteration is located in exon 4 (coding exon 3) of the TFPI gene. This alteration results from a T to A substitution at nucleotide position 324, causing the asparagine (N) at amino acid position 108 to be replaced by a lysine (K). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Benign

-0.22

BayesDel_noAF

Benign

-0.56

CADD

Benign

3.4

DANN

Benign

0.63

DEOGEN2

Benign

0.18

T;T;.;.

Eigen

Benign

-1.4

Eigen_PC

Benign

-1.4

FATHMM_MKL

Benign

0.039

LIST_S2

Benign

0.47

.;T;.;T

M_CAP

Benign

0.033

MetaRNN

Benign

0.061

T;T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.17

N;N;N;N

PrimateAI

Benign

0.46

PROVEAN

Benign

-0.040

N;N;N;N

REVEL

Benign

0.034

Sift

Benign

0.34

T;T;T;T

Sift4G

Benign

0.29

T;T;T;T

Polyphen

0.060

B;B;B;B

Vest4

0.13

MutPred

0.46

Gain of methylation at N108 (P = 0.0178);Gain of methylation at N108 (P = 0.0178);Gain of methylation at N108 (P = 0.0178);Gain of methylation at N108 (P = 0.0178);

MVP

0.37

MPC

0.48

ClinPred

0.18

GERP RS

-0.39

Varity_R

0.047

gMVP

0.77

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