11-1839699-G-A

Position:

• chr11-1839699-G-A

Variant summary

Our verdict is Pathogenic. Variant got 10 ACMG points: 10P and 0B. PVS1 PM2

The NM_003282.4(TNNI2):​c.3G>A​(p.Met1?) variant causes a start lost change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,632 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: TNNI2 NM_003282.4 start_lost
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.271

Genes affected

TNNI2 (HGNC:11946): (troponin I2, fast skeletal type) This gene encodes a fast-twitch skeletal muscle protein, a member of the troponin I gene family, and a component of the troponin complex including troponin T, troponin C and troponin I subunits. The troponin complex, along with tropomyosin, is responsible for the calcium-dependent regulation of striated muscle contraction. Mouse studies show that this component is also present in vascular smooth muscle and may play a role in regulation of smooth muscle function. In addition to muscle tissues, this protein is found in corneal epithelium, cartilage where it is an inhibitor of angiogenesis to inhibit tumor growth and metastasis, and mammary gland where it functions as a co-activator of estrogen receptor-related receptor alpha. This protein also suppresses tumor growth in human ovarian carcinoma. Mutations in this gene cause myopathy and distal arthrogryposis type 2B. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Mar 2009]

ACMG classification

Verdict is Pathogenic. Variant got 10 ACMG points.

• PVS1: Start lost variant, no new inframe start found.
• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TNNI2	NM_003282.4	c.3G>A	p.Met1?	start_lost	2/8	ENST00000381911.6
TNNI2	NM_001145829.2	c.3G>A	p.Met1?	start_lost	2/8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TNNI2	ENST00000381911.6	c.3G>A	p.Met1?	start_lost	2/8	2	NM_003282.4	A1
TNNI2	ENST00000252898.11	c.3G>A	p.Met1?	start_lost	1/7	3		A1
TNNI2	ENST00000381906.5	c.3G>A	p.Met1?	start_lost	2/8	3		A1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461632 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 727122

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000116

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Eurofins Ntd Llc (ga)

Dec 01, 2016

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.47	D
BayesDel_noAF	Pathogenic	0.37
CADD	Uncertain	24
DANN	Uncertain	0.99
DEOGEN2	Benign	0.32	T;T;.;T
Eigen	Benign	0.18
Eigen_PC	Benign	0.20
FATHMM_MKL	Benign	0.74	D
M_CAP	Pathogenic	0.97	D
MetaRNN	Pathogenic	0.88	D;D;D;D
MetaSVM	Pathogenic	0.91	D
MutationTaster	Benign	1.0	D;D;D
PROVEAN	Benign	-1.1	N;N;.;N
REVEL	Pathogenic	0.70
Sift	Uncertain	0.0070	D;D;.;D
Sift4G	Uncertain	0.017	D;D;D;D
Vest4		0.84
MutPred		0.55		Gain of ubiquitination at K6 (P = 0.0837);Gain of ubiquitination at K6 (P = 0.0837);Gain of ubiquitination at K6 (P = 0.0837);Gain of ubiquitination at K6 (P = 0.0837);
MVP		0.99
ClinPred		0.95	D
GERP RS		3.7
Varity_R		0.52
gMVP		0.27

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs1554969513; hg19: chr11-1860929;