1-173911941-C-T

Variant names:

Variant summary

Our verdict is Pathogenic. The variant received 6 ACMG points: 6P and 0B. PM2_SupportingPP3PS4

This summary comes from the ClinGen Evidence Repository: The c.482G>A (NM_000488.3) variant in SERPINC1 is a missense variant predicted to cause substitution of arginine by glutamine at amino acid 161 (p.Arg161Gln also known as ATIII Geneva). The highest population minor allele frequency in gnomAD v2.1.1 is 0.000008790 (1/113762 alleles) in the European population, which is lower than the ClinGen SERPINC1 threshold ([<0.00002]) for PM2_supporting, and therefore meets this criterion (PM2_supporting). The computational predictor REVEL gives a score of 0.691, which is above the threshold of >0.6 and provides evidence that correlates with impact to SERPINC1 function, meeting criteria for PP3. The variant has been reported in at least 9 probands with AT deficiency in the literature meeting PS4_very strong (9 points applied PMID 28300866, 2229057, 3603409). In summary, this variant meets criteria to be classified as likely pathogenic. ACMG/AMP criteria applied, as specified by the Thrombosis Variant Curation Expert Panel for SERPINC1: PM2_supporting, PP3, PS4_very strong. LINK:https://erepo.genome.network/evrepo/ui/classification/CA210779/MONDO:0013144/084

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.000015 ( 0 hom. )

Consequence

SERPINC1
NM_000488.4 missense

Scores

Clinical Significance

Pathogenic reviewed by expert panel P:3U:1

Conservation

PhyloP100: 7.57

Publications

7 publications found

Variant links:

Genes affected

SERPINC1 (HGNC:775): (serpin family C member 1) The protein encoded by this gene, antithrombin III, is a plasma protease inhibitor and a member of the serpin superfamily. This protein inhibits thrombin as well as other activated serine proteases of the coagulation system, and it regulates the blood coagulation cascade. The protein includes two functional domains: the heparin binding-domain at the N-terminus of the mature protein, and the reactive site domain at the C-terminus. The inhibitory activity is enhanced by the presence of heparin. Numerous mutations have been identified for this gene, many of which are known to cause antithrombin-III deficiency which constitutes a strong risk factor for thrombosis. A reduction in the serum level of this protein is associated with severe cases of Coronavirus Disease 19 (COVID-19). [provided by RefSeq, Sep 2020]

SERPINC1 Gene-Disease associations (from GenCC):

hereditary antithrombin deficiency
Inheritance: AD, AR, SD Classification: DEFINITIVE, STRONG, SUPPORTIVE, LIMITED Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), Ambry Genetics, Genomics England PanelApp, ClinGen

SERPINC1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 6 ACMG points.

PS4

For more information check the summary or visit ClinGen Evidence Repository.

PM2

For more information check the summary or visit ClinGen Evidence Repository.

PP3

For more information check the summary or visit ClinGen Evidence Repository.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SERPINC1	NM_000488.4 link	c.482G>A	p.Arg161Gln	missense_variant	Exon 3 of 7	ENST00000367698.4	NP_000479.1	P01008A0A024R944

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
SERPINC1	ENST00000367698.4 link	c.482G>A	p.Arg161Gln	missense_variant	Exon 3 of 7	1	NM_000488.4	ENSP00000356671.3	P01008
SERPINC1	ENST00000487183.1 link	n.187G>A		non_coding_transcript_exon_variant	Exon 2 of 4	2
SERPINC1	ENST00000494024.1 link	n.*39G>A		downstream_gene_variant		3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000398

AC:

AN:

251480

AF XY:

0.00000736

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000879

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000150

AC:

AN:

1461880

Hom.:

Cov.:

AF XY:

0.0000138

AC XY:

AN XY:

727240

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86254

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000198

AC:

AN:

1112002

Other (OTH)

AF:

0.00

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.486

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

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

Cov.:

Alfa

AF:

0.0000197

Hom.:

Bravo

AF:

0.00000756

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.00

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:3Uncertain:1

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

Hereditary antithrombin deficiency

Pathogenic:3Uncertain:1

Jun 01, 2014

CSER _CC_NCGL, University of Washington

Significance:Uncertain significance

Review Status:flagged submission

Collection Method:research

- -

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

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Nov 05, 1990

OMIM

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:literature only

- -

Jul 03, 2024

Clingen Thrombosis Variant Curation Expert Panel, ClinGen

Significance:Pathogenic

Review Status:reviewed by expert panel

Collection Method:curation

The c.482G>A (NM_000488.3) variant in SERPINC1 is a missense variant predicted to cause substitution of arginine by glutamine at amino acid 161 (p.Arg161Gln also known as ATIII Geneva). The highest population minor allele frequency in gnomAD v2.1.1 is 0.000008790 (1/113762 alleles) in the European population, which is lower than the ClinGen SERPINC1 threshold ([<0.00002]) for PM2, and therefore meets this criterion (PM2_supporting). The computational predictor REVEL gives a score of 0.691, which is above the threshold of >0.6 and provides evidence that correlates with impact to SERPINC1 function, meeting criteria for PP3. The variant has been reported in at least 9 probands with AT deficiency in the literature (9 points applied PMID 28300866, PMID 2229057, PMID 3603409). In summary, this variant meets criteria to be classified as likely pathogenic. ACMG/AMP criteria applied, as specified by the Thrombosis Variant Curation Expert Panel for SERPINC1: PM2_supporting, PP3, PS4_very strong. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.24

BayesDel_addAF

Pathogenic

0.33

BayesDel_noAF

Pathogenic

0.24

CADD

Pathogenic

(source)

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.41

.;T

Eigen

Pathogenic

0.70

Eigen_PC

Pathogenic

0.74

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.92

D;D

M_CAP

Benign

0.076

MetaRNN

Uncertain

0.73

D;D

MetaSVM

Uncertain

0.22

MutationAssessor

Benign

1.5

.;L

PhyloP100

7.6

PrimateAI

Uncertain

0.70

PROVEAN

Benign

-0.65

.;N

REVEL

Pathogenic

0.69

Sift

Benign

0.23

.;T

Sift4G

Benign

0.23

T;T

Polyphen

1.0

.;D

Vest4

0.73

MVP

0.92

MPC

1.2

ClinPred

0.95

GERP RS

5.7

Varity_R

0.71

gMVP

0.77

Mutation Taster

=6/94

disease causing (ClinVar)

(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

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over