NC_000002.11:g.(?_179563550)_(179565950_?)del AND multiple conditions

Germline classification:: Uncertain significance (1 submission)
Last evaluated:: May 6, 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:: RCV003105728.3

Allele description [Variation Report for NC_000002.11:g.(?_179563550)_(179565950_?)del]

NC_000002.11:g.(?_179563550)_(179565950_?)del

Gene:: TTN:titin [Gene - OMIM - HGNC]
Variant type:: Deletion
Cytogenetic location:: 2q31.2
Genomic location:: Chr2: 179563550 - 179565950 (on Assembly GRCh37)
Preferred name:: NC_000002.11:g.(?_179563550)_(179565950_?)del
HGVS:: NC_000002.11:g.(?_179563550)_(179565950_?)del
This HGVS expression did not pass validation

Condition(s)

Name:: Dilated cardiomyopathy 1G (CMD1G)
Identifiers:: MONDO: MONDO:0011400; MedGen: C1858763; Orphanet: 154; OMIM: 604145

Name:: Autosomal recessive limb-girdle muscular dystrophy type 2J (LGMDR10)
Synonyms:: Limb-girdle muscular dystrophy, type 2J; MUSCULAR DYSTROPHY, LIMB-GIRDLE, AUTOSOMAL RECESSIVE 10
Identifiers:: MONDO: MONDO:0012127; MedGen: C1837342; Orphanet: 140922; OMIM: 608807

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV003793442	Invitae	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (May 6, 2022)	germline	clinical testing	PubMed (4) [See all records that cite these PMIDs] 25589632, 29792937, 30238059, 28492532

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV003793442

Invitae

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Uncertain significance
(May 6, 2022)

germline

clinical testing

PubMed (4)
[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

Integrated allelic, transcriptional, and phenomic dissection of the cardiac effects of titin truncations in health and disease.

Roberts AM, Ware JS, Herman DS, Schafer S, Baksi J, Bick AG, Buchan RJ, Walsh R, John S, Wilkinson S, Mazzarotto F, Felkin LE, Gong S, MacArthur JA, Cunningham F, Flannick J, Gabriel SB, Altshuler DM, Macdonald PS, Heinig M, Keogh AM, Hayward CS, et al.

Sci Transl Med. 2015 Jan 14;7(270):270ra6. doi: 10.1126/scitranslmed.3010134.

PubMed [citation]

PMID:: 25589632
PMCID:: PMC4560092

A Reliable Targeted Next-Generation Sequencing Strategy for Diagnosis of Myopathies and Muscular Dystrophies, Especially for the Giant Titin and Nebulin Genes.

Zenagui R, Lacourt D, Pegeot H, Yauy K, Juntas Morales R, Theze C, Rivier F, Cances C, Sole G, Renard D, Walther-Louvier U, Ferrer-Monasterio X, Espil C, Arné-Bes MC, Cintas P, Uro-Coste E, Martin Negrier ML, Rigau V, Bieth E, Goizet C, Claustres M, Koenig M, et al.

J Mol Diagn. 2018 Jul;20(4):533-549. doi: 10.1016/j.jmoldx.2018.04.001. Epub 2018 May 21.

PubMed [citation]

PMID:: 29792937

See all PubMed Citations (4)

Details of each submission

From Invitae, SCV003793442.2

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (4)

Description

This variant is a gross deletion of the genomic region encompassing exon(s) 111-112 of the TTN gene. This variant would be expected to be in-frame, preserving the integrity of the reading frame. This variant has not been reported in the literature in individuals affected with TTN-related conditions. Experimental studies and prediction algorithms are not available or were not evaluated, and the functional significance of this variant is currently unknown. This variant disrupts the I band of TTN (PMID: 25589632). Copy number variants in TTN have been previously reported in individuals affected with neuromuscular disorders (PMID: 29792937, 30238059), but the functional significance of this variant is currently unknown. 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: Nov 11, 2023

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