Genetic Variant TNNI2:c.57+17G>C (chr11-1840461-G-C) – ACMG Classification: Benign (-16 pts)

Variant summary

Our verdict is Benign. Variant got -16 ACMG points: 0P and 16B. BP4_StrongBP6_Very_StrongBS2

The NM_003282.4(TNNI2):c.57+17G>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000465 in 1,608,362 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.00048 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00046 ( 1 hom. )

Consequence

TNNI2
NM_003282.4 intron

Scores

Clinical Significance

Likely benign criteria provided, multiple submitters, no conflicts B:2

Conservation

PhyloP100: -1.57

Variant links:

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]

TNNI2 links:

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ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -16 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.83).

BP6

Variant 11-1840461-G-C is Benign according to our data. Variant chr11-1840461-G-C is described in ClinVar as [Likely_benign]. Clinvar id is 259026.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS2

High AC in GnomAd4 at 73 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	Effect	Exon rank	MANE	Protein	UniProt
TNNI2	NM_003282.4 link	c.57+17G>C	intron_variant	Intron 4 of 7	ENST00000381911.6	NP_003273.1	P48788-1
TNNI2	NM_001145829.2 link	c.57+17G>C	intron_variant	Intron 4 of 7		NP_001139301.1	P48788-1
TNNI2	NM_001145841.2 link	c.57+17G>C	intron_variant	Intron 2 of 5		NP_001139313.1	P48788-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TNNI2	ENST00000381911.6 link	c.57+17G>C		intron_variant	Intron 4 of 7	2	NM_003282.4	ENSP00000371336.1		P48788-1

Frequencies

GnomAD3 genomes

AF:

0.000486

AC:

AN:

152172

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000531

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00118

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.0127

Gnomad NFE

AF:

0.000353

Gnomad OTH

AF:

0.00287

GnomAD3 exomes

AF:

0.000478

AC:

112

AN:

234122

Hom.:

AF XY:

0.000434

AC XY:

AN XY:

128900

show subpopulations

Gnomad AFR exome

AF:

0.000503

Gnomad AMR exome

AF:

0.000978

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000999

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000584

Gnomad OTH exome

AF:

0.00138

GnomAD4 exome

AF:

0.000464

AC:

675

AN:

1456070

Hom.:

Cov.:

AF XY:

0.000429

AC XY:

311

AN XY:

724292

show subpopulations

Gnomad4 AFR exome

AF:

0.000448

Gnomad4 AMR exome

AF:

0.00115

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000279

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000453

Gnomad4 OTH exome

AF:

0.000980

GnomAD4 genome

AF:

0.000479

AC:

AN:

152292

Hom.:

Cov.:

AF XY:

0.000443

AC XY:

AN XY:

74468

show subpopulations

Gnomad4 AFR

AF:

0.000529

Gnomad4 AMR

AF:

0.00118

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000353

Gnomad4 OTH

AF:

0.00284

Alfa

AF:

0.000385

Hom.:

Bravo

AF:

0.000589

Asia WGS

AF:

0.000577

AC:

AN:

3478

ClinVar

Significance: Likely benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:2

PreventionGenetics, part of Exact Sciences

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jan 30, 2018

GeneDx

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.83

CADD

Benign

1.6

DANN

Benign

0.13

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over