11-1841527-G-T

Variant names:

• chr11-1841527-G-T
• rs797046046
• NM_003282.4:c.525G>T

Variant summary

Our verdict is Pathogenic. The variant received 15 ACMG points: 15P and 0B. PM1 PM2 PP2 PP3_Moderate PP5_Very_Strong

The ENST00000381911.6(TNNI2):​c.525G>T​(p.Lys175Asn) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: TNNI2 ENST00000381911.6 missense
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:3
• Conservation: PhyloP100: 5.11
• Publications: 4 publications found

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 Gene-Disease associations (from GenCC):

• distal arthrogryposis type 2B1

  Inheritance: AD, AR Classification: STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
• digitotalar dysmorphism

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• Sheldon-hall syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Pathogenic. The variant received 15 ACMG points.

• PM1: In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 5 uncertain in ENST00000381911.6
• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 6 curated pathogenic missense variants (we use a threshold of 10). The gene has 0 curated benign missense variants. Gene score misZ: 0.61809 (below the threshold of 3.09). Trascript score misZ: 1.172 (below the threshold of 3.09). GenCC associations: The gene is linked to distal arthrogryposis type 2B1, digitotalar dysmorphism, Sheldon-hall syndrome.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.918
• PP5: Variant 11-1841527-G-T is Pathogenic according to our data. Variant chr11-1841527-G-T is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 212411.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: ENST00000381911.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TNNI2	NM_003282.4	MANE Select	c.525G>T	p.Lys175Asn	missense	Exon 8 of 8	NP_003273.1
	TNNI2	NM_001145829.2		c.525G>T	p.Lys175Asn	missense	Exon 8 of 8	NP_001139301.1
	TNNI2	NM_001145841.2		c.525G>T	p.Lys175Asn	missense	Exon 6 of 6	NP_001139313.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TNNI2	ENST00000381911.6	TSL:2 MANE Select	c.525G>T	p.Lys175Asn	missense	Exon 8 of 8	ENSP00000371336.1
	TNNI2	ENST00000252898.11	TSL:3	c.525G>T	p.Lys175Asn	missense	Exon 7 of 7	ENSP00000252898.7
	TNNI2	ENST00000381905.3	TSL:3	c.525G>T	p.Lys175Asn	missense	Exon 6 of 6	ENSP00000371330.3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

ClinVar

ClinVar submissions as Germline

Significance: Pathogenic/Likely pathogenic

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
3	-	-	Distal arthrogryposis type 2B1 (3)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.19	D
BayesDel_noAF	Uncertain	0.030
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.74	D
Eigen	Uncertain	0.48
Eigen_PC	Uncertain	0.33
FATHMM_MKL	Uncertain	0.89	D
LIST_S2	Pathogenic	0.99	D
M_CAP	Pathogenic	0.97	D
MetaRNN	Pathogenic	0.92	D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	3.1	M
PhyloP100		5.1
PrimateAI	Uncertain	0.75	T
PROVEAN	Uncertain	-4.2	D
REVEL	Pathogenic	0.77
Sift	Uncertain	0.0010	D
Sift4G	Uncertain	0.0020	D
Polyphen		1.0	D
Vest4		0.89
MutPred		0.40		Loss of ubiquitination at K175 (P = 0.0067)
MVP		1.0
MPC		0.95
ClinPred		1.0	D
GERP RS		2.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.84
gMVP		0.68
Mutation Taster		=3/97	disease causing (ClinVar)

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

Other links and lift over

dbSNP: rs797046046; hg19: chr11-1862757;