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NM_001267550.2(TTN):c.99197C>G (p.Ala33066Gly) AND multiple conditions

Germline classification:
Uncertain significance (1 submission)
Last evaluated:
Feb 15, 2020
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:
RCV001059537.7

Allele description [Variation Report for NM_001267550.2(TTN):c.99197C>G (p.Ala33066Gly)]

NM_001267550.2(TTN):c.99197C>G (p.Ala33066Gly)

Genes:
TTN-AS1:TTN antisense RNA 1 [Gene - HGNC]
TTN:titin [Gene - OMIM - HGNC]
Variant type:
single nucleotide variant
Cytogenetic location:
2q31.2
Genomic location:
Preferred name:
NM_001267550.2(TTN):c.99197C>G (p.Ala33066Gly)
HGVS:
  • NC_000002.12:g.178538632G>C
  • NG_011618.3:g.297171C>G
  • NG_051363.1:g.20806G>C
  • NM_001256850.1:c.94274C>G
  • NM_001267550.2:c.99197C>GMANE SELECT
  • NM_003319.4:c.72002C>G
  • NM_133378.4:c.91493C>G
  • NM_133432.3:c.72377C>G
  • NM_133437.4:c.72578C>G
  • NP_001243779.1:p.Ala31425Gly
  • NP_001254479.2:p.Ala33066Gly
  • NP_003310.4:p.Ala24001Gly
  • NP_596869.4:p.Ala30498Gly
  • NP_597676.3:p.Ala24126Gly
  • NP_597681.4:p.Ala24193Gly
  • LRG_391:g.297171C>G
  • NC_000002.11:g.179403359G>C
Protein change:
A24001G
Links:
dbSNP: rs1172364516
NCBI 1000 Genomes Browser:
rs1172364516
Molecular consequence:
  • NM_001256850.1:c.94274C>G - missense variant - [Sequence Ontology: SO:0001583]
  • NM_001267550.2:c.99197C>G - missense variant - [Sequence Ontology: SO:0001583]
  • NM_003319.4:c.72002C>G - missense variant - [Sequence Ontology: SO:0001583]
  • NM_133378.4:c.91493C>G - missense variant - [Sequence Ontology: SO:0001583]
  • NM_133432.3:c.72377C>G - missense variant - [Sequence Ontology: SO:0001583]
  • NM_133437.4:c.72578C>G - missense variant - [Sequence Ontology: SO:0001583]

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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Assertion and evidence details

Help
Submission AccessionSubmitterReview Status
(Assertion method)		Clinical Significance
(Last evaluated)		OriginMethodCitations
SCV001224164Labcorp Genetics (formerly Invitae), Labcorp
criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))		Uncertain significance
(Feb 15, 2020) 		germlineclinical testing

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

Help

Summary from all submissions

EthnicityOriginAffectedIndividualsFamiliesChromosomes testedNumber TestedFamily historyMethod
not providedgermlineunknownnot providednot providednot providednot providednot providedclinical 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

Recessive truncating titin gene, TTN, mutations presenting as centronuclear myopathy.

Ceyhan-Birsoy O, Agrawal PB, Hidalgo C, Schmitz-Abe K, DeChene ET, Swanson LC, Soemedi R, Vasli N, Iannaccone ST, Shieh PB, Shur N, Dennison JM, Lawlor MW, Laporte J, Markianos K, Fairbrother WG, Granzier H, Beggs AH.

Neurology. 2013 Oct 1;81(14):1205-14. doi: 10.1212/WNL.0b013e3182a6ca62. Epub 2013 Aug 23.

PubMed [citation]
PMID:
23975875
PMCID:
PMC3795603
See all PubMed Citations (3)

Details of each submission

From Labcorp Genetics (formerly Invitae), Labcorp, SCV001224164.4

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not providednot providednot providednot providedclinical testing PubMed (3)

Description

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. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site, but this prediction has not been confirmed by published transcriptional studies. Algorithms developed to predict the effect of missense changes on protein structure and function are unavailable for the TTN gene. This variant is located in the A band of TTN (PMID: 25589632). Variants in this region may be relevant for cardiac or neuromuscular disorders (PMID: 25589632, 23975875). This variant has been observed in individual(s) with clinical features of autosomal recessive limb-girdle muscular dystrophy (Invitae). This variant is not present in population databases (ExAC no frequency). This sequence change replaces alanine with glycine at codon 33066 of the TTN protein (p.Ala33066Gly). There is a small physicochemical difference between alanine and glycine.

#SampleMethodObservation
OriginAffectedNumber testedTissuePurposeMethodIndividualsAllele frequencyFamiliesCo-occurrences
1germlineunknownnot providednot providednot providednot providednot providednot providednot provided

Last Updated: Sep 29, 2024