NM_000083.3(CLCN1):c.1997_1998del (p.Cys666fs) AND Congenital myotonia, autosomal recessive form

Germline classification:: Likely pathogenic (1 submission)
Last evaluated:: Feb 20, 2024
Review status:: 1 star out of maximum of 4 stars
criteria provided, single submitter

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:: RCV003883253.1

Allele description [Variation Report for NM_000083.3(CLCN1):c.1997_1998del (p.Cys666fs)]

NM_000083.3(CLCN1):c.1997_1998del (p.Cys666fs)

Genes:

LOC123956257:Sharpr-MPRA regulatory region 4117 [Gene]
CLCN1:chloride voltage-gated channel 1 [Gene - OMIM - HGNC]

Variant type:

Microsatellite

Cytogenetic location:

7q34

Genomic location:

Preferred name:

NM_000083.3(CLCN1):c.1997_1998del (p.Cys666fs)

HGVS:

NC_000007.14:g.143345585GT[1]
NG_009815.2:g.34460GT[1]
NG_078448.1:g.270GT[1]
NM_000083.3:c.1997_1998delMANE SELECT
NP_000074.3:p.Cys666fs
NC_000007.13:g.143042678GT[1]
NM_000083.3:c.1996_1997delMANE SELECT
NR_046453.2:n.1950GT[1]

Protein change:

C666fs

Molecular consequence:

NM_000083.3:c.1997_1998del - frameshift variant - [Sequence Ontology: SO:0001589]
NR_046453.2:n.1950GT[1] - non-coding transcript variant - [Sequence Ontology: SO:0001619]

Condition(s)

Name:: Congenital myotonia, autosomal recessive form
Synonyms:: Myotonia congenita autosomal recessive; Becker disease; Myotonia generalized; See all synonyms [MedGen]
Identifiers:: MONDO: MONDO:0009715; MedGen: C0751360; Orphanet: 614; OMIM: 255700

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV004697559	Laboratory of Medical Genetics, National & Kapodistrian University of Athens	criteria provided, single submitter (ACMG Guidelines, 2015)	Likely pathogenic (Feb 20, 2024)	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

SCV004697559

Laboratory of Medical Genetics, National & Kapodistrian University of Athens

criteria provided, single submitter

(ACMG Guidelines, 2015)

Likely pathogenic
(Feb 20, 2024)

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	yes	not provided	not provided	not provided	not provided	not provided	clinical testing

Citations

PubMed

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

Details of each submission

From Laboratory of Medical Genetics, National & Kapodistrian University of Athens, SCV004697559.1

#	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	yes	not provided	not provided	not provided		not provided	not provided	not provided	not provided

Last Updated: Mar 10, 2024

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