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NM_000488.4(SERPINC1):c.778A>T (p.Lys260Ter) AND Hereditary antithrombin deficiency

Germline classification:
Pathogenic (1 submission)
Last evaluated:
Sep 21, 2023
Review status:
3 stars out of maximum of 4 stars
reviewed by expert panel
Somatic classification
of clinical impact:
None
Review status:
(0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided
Somatic classification
of oncogenicity:
None
Review status:
(0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided
Record status:
current
Accession:
RCV003330340.2

Allele description [Variation Report for NM_000488.4(SERPINC1):c.778A>T (p.Lys260Ter)]

NM_000488.4(SERPINC1):c.778A>T (p.Lys260Ter)

Gene:
SERPINC1:serpin family C member 1 [Gene - OMIM - HGNC]
Variant type:
single nucleotide variant
Cytogenetic location:
1q25.1
Genomic location:
Preferred name:
NM_000488.4(SERPINC1):c.778A>T (p.Lys260Ter)
Other names:
NM_001386306.1:c.562A>T
HGVS:
  • NC_000001.11:g.173909927T>A
  • NG_012462.1:g.12452A>T
  • NM_000488.4:c.778A>TMANE SELECT
  • NM_001365052.2:c.634A>T
  • NM_001386302.1:c.901A>T
  • NM_001386303.1:c.859A>T
  • NM_001386304.1:c.757A>T
  • NM_001386305.1:c.763-42A>T
  • NM_001386306.1:c.562A>T
  • NP_000479.1:p.Lys260Ter
  • NP_000479.1:p.Lys260Ter
  • NP_001351981.1:p.Lys212Ter
  • NP_001373231.1:p.Lys301Ter
  • NP_001373232.1:p.Lys287Ter
  • NP_001373233.1:p.Lys253Ter
  • NP_001373235.1:p.Lys188Ter
  • LRG_577t1:c.778A>T
  • LRG_577:g.12452A>T
  • LRG_577p1:p.Lys260Ter
  • NC_000001.10:g.173879065T>A
  • NM_000488.3:c.778A>T
Protein change:
K188*
Molecular consequence:
  • NM_001386305.1:c.763-42A>T - intron variant - [Sequence Ontology: SO:0001627]
  • NM_000488.4:c.778A>T - nonsense - [Sequence Ontology: SO:0001587]
  • NM_001365052.2:c.634A>T - nonsense - [Sequence Ontology: SO:0001587]
  • NM_001386302.1:c.901A>T - nonsense - [Sequence Ontology: SO:0001587]
  • NM_001386303.1:c.859A>T - nonsense - [Sequence Ontology: SO:0001587]
  • NM_001386304.1:c.757A>T - nonsense - [Sequence Ontology: SO:0001587]
  • NM_001386306.1:c.562A>T - nonsense - [Sequence Ontology: SO:0001587]

Condition(s)

Name:
Hereditary antithrombin deficiency
Synonyms:
Antithrombin III deficiency; Thrombophilia due to antithrombin III deficiency; Reduced antithrombin III activity; See all synonyms [MedGen]
Identifiers:
MONDO: MONDO:0013144; MedGen: C0272375; OMIM: 613118; Human Phenotype Ontology: HP:0001976

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Assertion and evidence details

Submission AccessionSubmitterReview Status
(Assertion method)
Clinical Significance
(Last evaluated)
OriginMethodCitations
SCV004037389Clingen Thrombosis Variant Curation Expert Panel, ClinGen
reviewed by expert panel

(ClinGen ACMG Specifications SERPINC1 V1.0.0)
Pathogenic
(Sep 21, 2023)
germlinecuration

Citation Link

Summary from all submissions

EthnicityOriginAffectedIndividualsFamiliesChromosomes testedNumber TestedFamily historyMethod
not providedgermlineunknownnot providednot providednot providednot providednot providedcuration

Details of each submission

From Clingen Thrombosis Variant Curation Expert Panel, ClinGen, SCV004037389.1

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not providednot providednot providednot providedcurationnot provided

Description

The c.778A>T, p.Lys260* (NM_000488.3) in SERPINC1 is a nonsense variant predicted to cause a premature stop codon at codon 260 in biologically-relevant exon 5/7 that leads to nonsense mediated decay (PVS1). This variant is absent from gnomAD v2.1.1 (PM2_Supporting). This variant has been reported in 1 proband with antithrombin activity level of 48 meeting the SERPINC1-phenotypic criteria (AT level of <0.8 IU/mL, no repeat testing) (PS4_Supporting; Internal lab contributors). In summary, this variant meets criteria to be classified as pathogenic. ACMG/AMP criteria applied, as specified by the Thrombosis Variant Curation Expert Panel for SERPINC1: PVS1, PM2_Supporting, PS4_Supporting.

#SampleMethodObservation
OriginAffectedNumber testedTissuePurposeMethodIndividualsAllele frequencyFamiliesCo-occurrences
1germlineunknownnot providednot providednot providednot providednot providednot providednot provided

Last Updated: Nov 11, 2023