TNNI3 variants in HCM cohorts


The table below lists the 135 rare (MAF<0.0001 in ExAC) protein-altering TNNI3 variants identified in a cohort of 6047 HCM patients (3135 patients from OMGL, 2912 patients from LMM). When this rare variant frequency of 0.02233 is compared with a background population rate of 0.00228, there is a statistically significant case excess of 0.02005 (p<0.0001), which suggests that approximately 122 of these variants may be pathogenic.


Variant Type:      All protein-altering variants     -     Truncating variants     -     Non-Truncating variants
Source:      Combined (OMGL + LMM)     -     OMGL     -     LMM



No. Variant (CDS) Variant (Protein) Variant Type Cases (6047)OMGL classLMM class ExAC frequency
1. c.433C>T p.R145Wmissense 13Pathogenic (10)Pathogenic (3)0.000008
2. c.485G>A p.R162Qmissense 12VUS (4)Likely Pathogenic (8)0.000024
3. c.470C>T p.A157Vmissense 11Likely Pathogenic (3)Pathogenic (8)0.000000
4. c.422G>A p.R141Qmissense 11Likely Pathogenic (6)Likely Pathogenic (5)0.000000
5. c.484C>T p.R162Wmissense 9VUS (7)VUS (2)0.000033
6. c.586G>A p.D196Nmissense 6Likely Pathogenic (4)VUS favour pathogenic (2)0.000008
7. c.557G>A p.R186Qmissense 5Pathogenic (2)Pathogenic (3)0.000000
8. c.611G>A p.R204Hmissense 4Likely Pathogenic (1)Likely Pathogenic (3)0.000000
9. c.434G>A p.R145Qmissense 4Likely Pathogenic (4)0.000024
10. c.433C>G p.R145Gmissense 3Pathogenic (2)Pathogenic (1)0.000000
11. c.407G>A p.R136Qmissense 3Likely Pathogenic (3)0.000008
12. c.428C>A p.T143Nmissense 3VUS (3)0.000024
13. c.431T>C p.L144Pmissense 2Likely Pathogenic (1)Pathogenic (1)0.000000
14. c.596G>A p.S199Nmissense 2Likely Pathogenic (2)0.000000
15. c.509G>A p.R170Qmissense 2Pathogenic (2)0.000000
16. c.236G>T p.R79Lmissense 2VUS (2)0.000046
17. c.602T>C p.M201Tmissense 2Likely Pathogenic (1)Likely Pathogenic (1)0.000000
18. c.610C>T p.R204Cmissense 2VUS favour pathogenic (2)0.000000
19. c.538del p.Asp180Thrfs*19frameshift 2Pathogenic (2)0.000000
20. c.575G>A p.R192Hmissense 2Likely Pathogenic (2)0.000000
21. c.625G>A p.E209Kmissense 2VUS (1)VUS favour pathogenic (1)0.000000
22. c.512C>A p.A171Dmissense 1VUS (1)0.000000
23. c.338del p.Asp113Alafs*2frameshift 1Pathogenic (1)0.000000
24. c.575G>T p.R192Lmissense 1Likely Pathogenic (1)0.000000
25. c.389A>G p.Q130Rmissense 1Likely Pathogenic (1)0.000000
26. c.439G>C p.V147Lmissense 1VUS (1)0.000008
27. c.383T>A p.L128Qmissense 1VUS (1)0.000000
28. c.167T>C p.I56Tmissense 1VUS favour pathogenic (1)0.000024
29. c.549G>C p.K183Nmissense 1Likely Pathogenic (1)0.000000
30. c.626A>C p.E209Amissense 1Likely Pathogenic (1)0.000000
31. c.579G>C p.K193Nmissense 1VUS favour pathogenic (1)0.000000
32. c.593T>G p.L198Rmissense 1VUS (1)0.000000
33. c.532A>G p.K178Emissense 1Pathogenic (1)0.000000
34. c.488C>G p.A163Gmissense 1VUS (1)0.000000
35. c.285C>A p.D95Emissense 1VUS (1)0.000000
36. c.590C>G p.A197Gmissense 1VUS (1)0.000000
37. c.506del p.Leu169Argfs*8frameshift 1VUS (1)0.000000
38. c.526G>A p.V176Mmissense 1VUS favour pathogenic (1)0.000000
39. c.292C>T p.R98Xnonsense 1VUS (1)0.000091
40. c.379G>C p.D127Hmissense 1VUS (1)0.000000
41. c.485G>C p.R162Pmissense 1Likely Pathogenic (1)0.000000
42. c.368C>T p.T123Mmissense 1VUS (1)0.000025
43. c.607G>C p.G203Rmissense 1Likely Pathogenic (1)0.000000
44. c.390G>C p.Q130Hmissense 1VUS (1)0.000000
45. c.592C>G p.L198Vmissense 1VUS favour pathogenic (1)0.000000
46. c.573G>A p.W191Xnonsense 1VUS (1)0.000000
47. c.511G>A p.A171Tmissense 1Likely Pathogenic (1)0.000000
48. c.231C>A p.S77Rmissense 1VUS (1)0.000000
49. c.497C>T p.S166Fmissense 1VUS favour pathogenic (1)0.000008
50. c.605A>C p.E202Amissense 1VUS (1)0.000000
51. c.581A>C p.N194Tmissense 1VUS (1)0.000008
52. c.490A>G p.K164Emissense 1VUS (1)0.000000
53. c.568G>T p.D190Ymissense 1Likely Pathogenic (1)0.000000
54. c.532_534delAAG inframe 1Pathogenic (1)0.000000

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. 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.