• Atlas of Cardiac Genetic Variation
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•           Inherited Cardiac Conditions          
  • Hypertrophic Cardiomyopathy - HCM
  • Dilated Cardiomyopathy - DCM
  • Arrhythmogenic RV Cardiomyopathy - ARVC
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• ABCC9ACTC1ACTN2ANK2ANKRD1CALR3CASQ2CAV3CRYABCSRP3CTF1DESDSC2DSG2DSPDTNAEMDFHL1FHL2FXNGLAJPH2JUPKCNE1KCNE2KCNH2KCNJ2KCNQ1KLF10LAMA4LAMP2LDB3LMNAMYBPC3MYH6MYH7MYL2MYL3MYLK2MYOM1MYOZ2MYPNNEXNOBSCNPDLIM3PKP2PLNPRKAG2RBM20RYR2SCN5ASGCDSRITAZTCAPTGFB3TMEM43TNNC1TNNI3TNNT2TPM1TRIM54TRIM55TRIM63TTNTTRVCL

TTN : c.9326A>G

Variant Details

Variant (CDS)	Variant (protein)	Variant Type	Variant Effect	Genomic Location (GRCh37)	ExAC Frequency
c.9326A>G	p.K3109R (Lys > Arg)	substitution	missense	chr2:179632631 (reverse strand)	0.00000825

Effect in Cardiac Disease

This variant is considered a rare variant, with a population frequency of 0.00000825 (ExAC mean allelic frequency).

The role on non-truncating TTN variants in cardiac disease has not yet been analysed in these studies.

Detection in Population Databases

Database	European	African	East Asian	South Asian	American	Finnish	Other	Total
ExAC	0.00000000 0 / 66704	0.00009612 1 / 10404	0.00000000 0 / 8572	0.00000000 0 / 16510	0.00000000 0 / 11536	0.00000000 0 / 6608	0.00000000 0 / 908	0.00000825 1 / 121242
ESP	0.00000 0 / 8600	0.00000 0 / 4400						0.00000 0 / 13000
1KG	0.00000 0 / 1006	0.00000 0 / 1322	0.00000 0 / 1008	0.00000 0 / 978	0.00000 0 / 694	0.00000 0 / 198		0.00000 0 / 5008

The Exome Aggregation Consortium (ExAC) is a database of 60,706 unrelated individuals sequenced as part of various disease-specific and population genetic studies. There is partial overlap between ExAC and 1000 Genomes (1KG) (1,851 of the 2,504 samples in 1KG) and the Exome Sequencing Project (ESP) (3,936 of the 6,500 samples in ESP).

Other Variant & Gene Details

Canonical Sequences
Transcript	ENST00000589042	LRG_391t1	NM_001267550.1
Protein	ENSP00000467141	LRG_391p1

Missense Variant Predictions
SIFT	Grantham	Polyphen-DIV	Polyphen-VAR	Summary 12.5% of algorithms have predicted that this variant will adversely affect protein function
damaging	conservative	benign	benign
LRT	MutationTaster	MutationAssessor	FATHMM
	polymorphism	neutral	tolerated

References

1. Roddy Walsh, Kate L. Thomson, James S. Ware, Birgit H. Funke, Jessica Woodley, Karen J. McGuire, Francesco Mazzarotto, Edward Blair, Anneke Seller, Jenny C. Taylor, Eric V. Minikel, Exome Aggregation Consortium, Daniel G. MacArthur, Martin Farrall, Stuart A. Cook and Hugh Watkins. Reassessment of Mendelian gene pathogenicity using 7,855 cardiomyopathy cases and 60,706 reference samples. Genet Med. 2016 doi:10.1038/gim.2016.90.

2. Pugh TJ, Kelly MA, Gowrisankar S, Hynes E, Seidman MA, Baxter SM, Bowser M, Harrison B, Aaron D, Mahanta LM, Lakdawala NK, McDermott G, White ET, Rehm HL, Lebo M, Funke BH. The landscape of genetic variation in dilated cardiomyopathy as surveyed by clinical DNA sequencing. Genet Med. 2014 Aug;16(8):601-8.

3. Alfares AA, Kelly MA, McDermott G, Funke BH, Lebo MS, Baxter SB, Shen J, McLaughlin HM, Clark EH, Babb LJ, Cox SW, DePalma SR, Ho CY, Seidman JG, Seidman CE, Rehm HL. Results of clinical genetic testing of 2,912 probands with hypertrophic cardiomyopathy: expanded panels offer limited additional sensitivity. Genet Med. 2015 Nov;17(11):880-8.