NM_000492.4(CFTR):c.980T>G (p.Leu327Arg) AND Cystic fibrosis

Germline classification:: Uncertain significance (3 submissions)
Last evaluated:: Mar 23, 2022
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:: RCV001241079.10

Allele description [Variation Report for NM_000492.4(CFTR):c.980T>G (p.Leu327Arg)]

NM_000492.4(CFTR):c.980T>G (p.Leu327Arg)

Gene:

CFTR:CF transmembrane conductance regulator [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

7q31.2

Genomic location:

Preferred name:

NM_000492.4(CFTR):c.980T>G (p.Leu327Arg)

HGVS:

NC_000007.14:g.117540210T>G
NG_016465.4:g.79427T>G
NM_000492.4:c.980T>GMANE SELECT
NP_000483.3:p.Leu327Arg
LRG_663t1:c.980T>G
LRG_663:g.79427T>G
NC_000007.13:g.117180264T>G
NC_000007.13:g.117180264T>G
NM_000492.3:c.980T>G

Protein change:

L327R

Links:

dbSNP: rs141115171

NCBI 1000 Genomes Browser:

rs141115171

Molecular consequence:

NM_000492.4:c.980T>G - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:: Cystic fibrosis (CF)
Synonyms:: Mucoviscidosis
Identifiers:: MONDO: MONDO:0009061; MedGen: C0010674; Orphanet: 586; OMIM: 219700

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV001414071	Labcorp Genetics (formerly Invitae), Labcorp	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (Sep 1, 2021)	germline	clinical testing	PubMed (2) [See all records that cite these PMIDs] 8992448, 28492532
SCV002027383	Genome-Nilou Lab	criteria provided, single submitter (ACMG Guidelines, 2015)	Uncertain significance (Sep 5, 2021)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]
SCV002689600	Ambry Genetics	criteria provided, single submitter (Ambry Variant Classification Scheme 2023)	Uncertain significance (Mar 23, 2022)	germline	clinical testing	PubMed (2) [See all records that cite these PMIDs] 10653140, 8992448 Citation Link

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV001414071

Labcorp Genetics (formerly Invitae), Labcorp

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Uncertain significance
(Sep 1, 2021)

germline

clinical testing

PubMed (2)
[See all records that cite these PMIDs]

SCV002027383

Genome-Nilou Lab

criteria provided, single submitter

(ACMG Guidelines, 2015)

Uncertain significance
(Sep 5, 2021)

germline

clinical testing

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

SCV002689600

Ambry Genetics

criteria provided, single submitter

(Ambry Variant Classification Scheme 2023)

Uncertain significance
(Mar 23, 2022)

germline

clinical testing

PubMed (2)
[See all records that cite these PMIDs]

Citation Link

Help

Summary from all submissions

Ethnicity	Origin	Affected	Individuals	Families	Chromosomes tested	Number Tested	Family history	Method
not provided	germline	no	not provided	not provided	not provided	not provided	not provided	clinical testing
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

Standards and guidelines for the interpretation of sequence variants: a joint consensus recommendation of the American College of Medical Genetics and Genomics and the Association for Molecular Pathology.

Richards S, Aziz N, Bale S, Bick D, Das S, Gastier-Foster J, Grody WW, Hegde M, Lyon E, Spector E, Voelkerding K, Rehm HL; ACMG Laboratory Quality Assurance Committee..

Genet Med. 2015 May;17(5):405-24. doi: 10.1038/gim.2015.30. Epub 2015 Mar 5.

PubMed [citation]

PMID:: 25741868
PMCID:: PMC4544753

See all PubMed Citations (4)

Details of each submission

From Labcorp Genetics (formerly Invitae), Labcorp, SCV001414071.3

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (2)

Description

This sequence change replaces leucine with arginine at codon 327 of the CFTR protein (p.Leu327Arg). The leucine residue is moderately conserved and there is a moderate physicochemical difference between leucine and arginine. This variant is present in population databases (rs141115171, ExAC 0.004%). This missense change has been observed in individual(s) with hereditary pancreatitis (PMID: 8992448). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). 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

From Genome-Nilou Lab, SCV002027383.1

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

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	no	not provided	not provided	not provided		not provided	not provided	not provided	not provided

From Ambry Genetics, SCV002689600.2

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (2)

Description

The p.L327R variant (also known as c.980T>G), located in coding exon 8 of the CFTR gene, results from a T to G substitution at nucleotide position 980. The leucine at codon 327 is replaced by arginine, an amino acid with dissimilar properties. Co-segregation was reported in a family with hereditary pancreatitis in two affected individuals, and the alteration was not detected in one unaffected individual (Ravnik-Glavac M, Pflugers Arch. 1996 ; 431(6 Suppl 2):R191-2; Ravnik-Glavac et al. Pflugers Arch. 2000 ;439(3 Suppl):R50-2). This amino acid position is not well conserved in available vertebrate species. 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

Last Updated: Sep 29, 2024

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