NM_000426.4(LAMA2):c.4334_4352dup (p.Cys1451delinsTrpTer) AND LAMA2-related muscular dystrophy

Germline classification:: Pathogenic (1 submission)
Last evaluated:: Nov 12, 2022
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:: RCV003735166.2

Allele description [Variation Report for NM_000426.4(LAMA2):c.4334_4352dup (p.Cys1451delinsTrpTer)]

NM_000426.4(LAMA2):c.4334_4352dup (p.Cys1451delinsTrpTer)

Gene:

LAMA2:laminin subunit alpha 2 [Gene - OMIM - HGNC]

Variant type:

Duplication

Cytogenetic location:

6q22.33

Genomic location:

Preferred name:

NM_000426.4(LAMA2):c.4334_4352dup (p.Cys1451delinsTrpTer)

HGVS:

NC_000006.12:g.129342365_129342383dup
NG_008678.1:g.464225_464243dup
NM_000426.4:c.4334_4352dupMANE SELECT
NM_001079823.2:c.4334_4352dup
NP_000417.2:p.Cys1451Trpfs
NP_000417.3:p.Cys1451delinsTrpTer
NP_001073291.2:p.Cys1451delinsTrpTer
LRG_409t1:c.4334_4352dup
LRG_409:g.464225_464243dup
LRG_409p1:p.Cys1451Trpfs
NC_000006.11:g.129663507_129663508insTGGTGACTTCTGTGAACGA
NC_000006.11:g.129663510_129663528dup
NM_000426.3:c.4334_4352dup

Molecular consequence:

NM_000426.4:c.4334_4352dup - nonsense - [Sequence Ontology: SO:0001587]
NM_001079823.2:c.4334_4352dup - nonsense - [Sequence Ontology: SO:0001587]

Condition(s)

Name:: LAMA2-related muscular dystrophy (LAMA2-RD)
Synonyms:: Laminin alpha 2-related dystrophy
Identifiers:: MONDO: MONDO:0100228; MedGen: C5679788

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LATS1 large tumor suppressor kinase 1 [Homo sapiens]
LATS1 large tumor suppressor kinase 1 [Homo sapiens]
Gene ID:9113

Gene
9113[uid] AND (alive[prop]) (1)
Gene

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV004412635	Labcorp Genetics (formerly Invitae), Labcorp	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Pathogenic (Nov 12, 2022)	germline	clinical testing	PubMed (3) [See all records that cite these PMIDs] 18700894, 32904964, 28492532

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV004412635

Labcorp Genetics (formerly Invitae), Labcorp

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Pathogenic
(Nov 12, 2022)

germline

clinical testing

PubMed (3)
[See all records that cite these PMIDs]

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

LAMA2 gene analysis in a cohort of 26 congenital muscular dystrophy patients.

Oliveira J, Santos R, Soares-Silva I, Jorge P, Vieira E, Oliveira ME, Moreira A, Coelho T, Ferreira JC, Fonseca MJ, Barbosa C, Prats J, Aríztegui ML, Martins ML, Moreno T, Heinimann K, Barbot C, Pascual-Pascual SI, Cabral A, Fineza I, Santos M, Bronze-da-Rocha E.

Clin Genet. 2008 Dec;74(6):502-12. doi: 10.1111/j.1399-0004.2008.01068.x. Epub 2008 Jun 11.

PubMed [citation]

PMID:: 18700894

Limb girdle muscular dystrophy due to LAMA2 gene mutations: new mutations expand the clinical spectrum of a still challenging diagnosis.

Magri F, Brusa R, Bello L, Peverelli L, Del Bo R, Govoni A, Cinnante C, Colombo I, Fortunato F, Tironi R, Corti S, Grimoldi N, Sciacco M, Bresolin N, Pegoraro E, Moggio M, Comi GP.

Acta Myol. 2020 Jun;39(2):67-82. doi: 10.36185/2532-1900-009.

PubMed [citation]

PMID:: 32904964
PMCID:: PMC7460730

See all PubMed Citations (3)

Details of each submission

From Labcorp Genetics (formerly Invitae), Labcorp, SCV004412635.1

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (3)

Description

For these reasons, this variant has been classified as Pathogenic. This variant has not been reported in the literature in individuals affected with LAMA2-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change creates a premature translational stop signal (p.Cys1451Trpfs*2) in the LAMA2 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in LAMA2 are known to be pathogenic (PMID: 18700894, 32904964).

#	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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