NM_007272.3(CTRC):c.763G>C (p.Val255Leu) AND Hereditary pancreatitis

Germline classification:: Uncertain significance (2 submissions)
Last evaluated:: Dec 1, 2023
Review status:: 2 stars out of maximum of 4 stars
criteria provided, multiple submitters, no conflicts

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:: RCV002396354.4

Allele description [Variation Report for NM_007272.3(CTRC):c.763G>C (p.Val255Leu)]

NM_007272.3(CTRC):c.763G>C (p.Val255Leu)

Gene:

CTRC:chymotrypsin C [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

1p36.21

Genomic location:

Preferred name:

NM_007272.3(CTRC):c.763G>C (p.Val255Leu)

HGVS:

NC_000001.11:g.15445720G>C
NG_009253.2:g.12279G>C
NM_007272.3:c.763G>CMANE SELECT
NP_009203.2:p.Val255Leu
NC_000001.10:g.15772215G>C
NG_009253.1:g.12278G>C
NM_007272.2:c.763G>C

Protein change:

V255L

Molecular consequence:

NM_007272.3:c.763G>C - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:: Hereditary pancreatitis (PCTT)
Synonyms:: Hereditary chronic pancreatitis
Identifiers:: MONDO: MONDO:0008185; MedGen: C0238339; Orphanet: 676; OMIM: 167800

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV002671759	Ambry Genetics	criteria provided, single submitter (Ambry Variant Classification Scheme 2023)	Uncertain significance (Jul 28, 2021)	germline	clinical testing	Citation Link,
SCV004518159	Labcorp Genetics (formerly Invitae), Labcorp	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (Dec 1, 2023)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV002671759

Ambry Genetics

criteria provided, single submitter

(Ambry Variant Classification Scheme 2023)

Uncertain significance
(Jul 28, 2021)

germline

clinical testing

Citation Link,

SCV004518159

Labcorp Genetics (formerly Invitae), Labcorp

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Uncertain significance
(Dec 1, 2023)

germline

clinical testing

PubMed (1)
[See all records that cite this PMID]

Help

Summary from all submissions

Ethnicity	Origin	Affected	Individuals	Families	Chromosomes tested	Number Tested	Family history	Method
not provided	germline	unknown	not provided	not provided	not provided	not provided	not provided	clinical testing

Citations

PubMed

Sherloc: a comprehensive refinement of the ACMG-AMP variant classification criteria.

Nykamp K, Anderson M, Powers M, Garcia J, Herrera B, Ho YY, Kobayashi Y, Patil N, Thusberg J, Westbrook M; Invitae Clinical Genomics Group., Topper S.

Genet Med. 2017 Oct;19(10):1105-1117. doi: 10.1038/gim.2017.37. Epub 2017 May 11. Erratum in: Genet Med. 2020 Jan;22(1):240. doi: 10.1038/s41436-019-0624-9.

PubMed [citation]

PMID:: 28492532
PMCID:: PMC5632818

Details of each submission

From Ambry Genetics, SCV002671759.2

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	not provided

Description

The p.V255L variant (also known as c.763G>C), located in coding exon 7 of the CTRC gene, results from a G to C substitution at nucleotide position 763. The valine at codon 255 is replaced by leucine, an amino acid with highly similar properties. This amino acid position is conserved. In addition, this alteration is predicted to be deleterious by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear.

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

From Labcorp Genetics (formerly Invitae), Labcorp, SCV004518159.1

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (1)

Description

This sequence change replaces valine, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 255 of the CTRC protein (p.Val255Leu). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with CTRC-related conditions. ClinVar contains an entry for this variant (Variation ID: 1759936). 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 not expected to disrupt CTRC protein function with a negative predictive value of 80%. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance.

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

Last Updated: Sep 29, 2024

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