1-74235488-A-G

Position:

• chr1-74235488-A-G

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_Moderate BS2

The NM_015978.3(TNNI3K):​c.37A>G​(p.Thr13Ala) variant causes a missense change. The variant allele was found at a frequency of 0.0000062 in 1,289,304 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000062 (0 hom.)
• Consequence: TNNI3K NM_015978.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.48

Genes affected

TNNI3K (HGNC:19661): (TNNI3 interacting kinase) This gene encodes a protein that belongs to the MAP kinase kinase kinase (MAPKKK) family of protein kinases. The protein contains ankyrin repeat, protein kinase and serine-rich domains and is thought to play a role in cardiac physiology. [provided by RefSeq, Sep 2012]

FPGT-TNNI3K (HGNC:):

ACMG classification

Verdict is Likely_benign. Variant got -6 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.18396908).
• BS2: High AC in GnomAdExome4 at 8 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TNNI3K	NM_015978.3	c.37A>G	p.Thr13Ala	missense_variant	1/25	ENST00000326637.8
FPGT-TNNI3K	NM_001112808.3	c.344-614A>G		intron_variant
FPGT-TNNI3K	NM_001199327.2	c.344-614A>G		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TNNI3K	ENST00000326637.8	c.37A>G	p.Thr13Ala	missense_variant	1/25	1	NM_015978.3	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000620 AC: 8 AN: 1289304 Hom.: 0 Cov.: 21 AF XY: 0.00000308 AC XY: 2 AN XY: 649090

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: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000821

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

Labcorp Genetics (formerly Invitae), Labcorp

Dec 04, 2023

This sequence change replaces threonine, which is neutral and polar, with alanine, which is neutral and non-polar, at codon 13 of the TNNI3K protein (p.Thr13Ala). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with TNNI3K-related conditions. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt TNNI3K protein function with a negative predictive value of 80%. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.23
BayesDel_addAF	Benign	-0.017	T
BayesDel_noAF	Benign	-0.26
CADD	Benign	19
DANN	Benign	0.96
DEOGEN2	Benign	0.026	T
Eigen	Benign	-0.088
Eigen_PC	Benign	0.088
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Benign	0.76	T
M_CAP	Benign	0.033	D
MetaRNN	Benign	0.18	T
MetaSVM	Benign	-0.99	T
MutationAssessor	Benign	-1.2	N
MutationTaster	Benign	0.80	D;D;D
PROVEAN	Benign	-0.12	N
REVEL	Benign	0.27
Sift	Benign	0.34	T
Sift4G	Benign	0.52	T
Polyphen		0.0	B
Vest4		0.48
MutPred		0.29		Loss of phosphorylation at T13 (P = 0.0554);
MVP		0.60
ClinPred		0.31	T
GERP RS		4.8
Varity_R		0.053
gMVP		0.50

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: rs1451279328; hg19: chr1-74701172;