NM_001267550.2(TTN):c.687T>C (p.Phe229=) AND not specified

Germline classification:: Benign/Likely benign (3 submissions)
Last evaluated:: May 2, 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:: RCV000155018.9

Allele description [Variation Report for NM_001267550.2(TTN):c.687T>C (p.Phe229=)]

NM_001267550.2(TTN):c.687T>C (p.Phe229=)

Gene:

TTN:titin [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

2q31.2

Genomic location:

Preferred name:

NM_001267550.2(TTN):c.687T>C (p.Phe229=)

Other names:

p.F229F:TTT>TTC

HGVS:

NC_000002.12:g.178799714A>G
NG_011618.3:g.36089T>C
NM_001256850.1:c.687T>C
NM_001267550.2:c.687T>CMANE SELECT
NM_003319.4:c.687T>C
NM_133378.4:c.687T>C
NM_133379.5:c.687T>C
NM_133432.3:c.687T>C
NM_133437.4:c.687T>C
NP_001243779.1:p.Phe229=
NP_001254479.2:p.Phe229=
NP_003310.4:p.Phe229=
NP_596869.4:p.Phe229=
NP_596870.2:p.Phe229=
NP_597676.3:p.Phe229=
NP_597681.4:p.Phe229=
LRG_391t1:c.687T>C
LRG_391:g.36089T>C
NC_000002.11:g.179664441A>G
NM_001267550.1:c.687T>C
NM_003319.4:c.687T>C
p.Phe229Phe

Links:

dbSNP: rs376527094

NCBI 1000 Genomes Browser:

rs376527094

Molecular consequence:

NM_001256850.1:c.687T>C - synonymous variant - [Sequence Ontology: SO:0001819]
NM_001267550.2:c.687T>C - synonymous variant - [Sequence Ontology: SO:0001819]
NM_003319.4:c.687T>C - synonymous variant - [Sequence Ontology: SO:0001819]
NM_133378.4:c.687T>C - synonymous variant - [Sequence Ontology: SO:0001819]
NM_133379.5:c.687T>C - synonymous variant - [Sequence Ontology: SO:0001819]
NM_133432.3:c.687T>C - synonymous variant - [Sequence Ontology: SO:0001819]
NM_133437.4:c.687T>C - synonymous variant - [Sequence Ontology: SO:0001819]

Observations:

Condition(s)

Synonyms:: AllHighlyPenetrant
Identifiers:: MedGen: CN169374

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV000204701	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	criteria provided, single submitter (LMM Criteria)	Likely benign (Jul 21, 2017)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]
SCV000236739	GeneDx	criteria provided, single submitter (GeneDx Variant Classification (06012015))	Benign (Oct 2, 2014)	germline	clinical testing	Citation Link,
SCV002547653	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	criteria provided, single submitter (LabCorp Variant Classification Summary - May 2015)	Likely benign (May 2, 2022)	germline	clinical testing	Citation Link

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV000204701

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

criteria provided, single submitter

(LMM Criteria)

Likely benign
(Jul 21, 2017)

germline

clinical testing

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

SCV000236739

GeneDx

criteria provided, single submitter

(GeneDx Variant Classification (06012015))

Benign
(Oct 2, 2014)

germline

clinical testing

Citation Link,

SCV002547653

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

criteria provided, single submitter

(LabCorp Variant Classification Summary - May 2015)

Likely benign
(May 2, 2022)

germline

clinical testing

Citation Link

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
not provided	germline	not provided	2	2	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

A systematic approach to assessing the clinical significance of genetic variants.

Duzkale H, Shen J, McLaughlin H, Alfares A, Kelly MA, Pugh TJ, Funke BH, Rehm HL, Lebo MS.

Clin Genet. 2013 Nov;84(5):453-63. doi: 10.1111/cge.12257.

PubMed [citation]

PMID:: 24033266
PMCID:: PMC3995020

Details of each submission

From Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine, SCV000204701.5

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

Description

p.Phe229Phe in exon 6 of TTN: This variant is not expected to have clinical sign ificance because it does not alter an amino acid residue and is not located with in the splice consensus sequence. It has been identified in 49/276838 chromosome s by the Genome Aggregation Database (gnomAD, http://gnomad.broadinstitute.org; dbSNP rs376527094).

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	not provided	not provided	not provided	not provided		2	not provided	2	not provided

From GeneDx, SCV000236739.10

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

Description

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease.

#	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

From Women's Health and Genetics/Laboratory Corporation of America, LabCorp, SCV002547653.1

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

#	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: Mar 11, 2025

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