8-23702462-T-C

Variant names:

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_001136271.3(NKX2-6):c.895A>G(p.Arg299Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000304 in 1,478,314 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00030 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00030 ( 0 hom. )

Consequence

NKX2-6
NM_001136271.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: -1.32

Variant links:

Genes affected

NKX2-6 (HGNC:32940): (NK2 homeobox 6) This gene encodes a homeobox-containing protein that belongs to the NK-2 homeobox family. This protein is a vertebrate homolog of Drosophila homeobox-containing protein called 'tinman', which has been shown to be essential for development of the heart-like dorsal vessel. In conjunction with related gene, NKX2-5, this gene may play a role in both pharyngeal and cardiac embryonic development. Mutations in this gene are associated with persistent truncus arteriosus.[provided by RefSeq, Aug 2011]

NKX2-6 links:

LOC107986930 (HGNC:):

LOC107986930 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.05996594).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NKX2-6	NM_001136271.3 link	c.895A>G	p.Arg299Gly	missense_variant	Exon 2 of 2	ENST00000325017.4	NP_001129743.2	A6NCS4
LOC107986930	XR_001745842.2 link	n.1312+33712T>C		intron_variant	Intron 3 of 4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NKX2-6	ENST00000325017.4 link	c.895A>G	p.Arg299Gly	missense_variant	Exon 2 of 2	2	NM_001136271.3	ENSP00000320089.3		A6NCS4

Frequencies

GnomAD3 genomes

AF:

0.000302

AC:

AN:

152238

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000196

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.000603

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000330

AC:

AN:

99986

Hom.:

AF XY:

0.000289

AC XY:

AN XY:

51966

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000317

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000307

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000535

Gnomad OTH exome

AF:

0.000652

GnomAD4 exome

AF:

0.000304

AC:

403

AN:

1325958

Hom.:

Cov.:

AF XY:

0.000328

AC XY:

212

AN XY:

645776

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000343

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000503

Gnomad4 FIN exome

AF:

0.0000278

Gnomad4 NFE exome

AF:

0.000300

Gnomad4 OTH exome

AF:

0.000472

GnomAD4 genome

AF:

0.000302

AC:

AN:

152356

Hom.:

Cov.:

AF XY:

0.000282

AC XY:

AN XY:

74502

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000196

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000603

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.000684

Hom.:

Bravo

AF:

0.000246

ExAC

AF:

0.000257

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Conotruncal heart malformations

Uncertain:1

Jan 23, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces arginine, which is basic and polar, with glycine, which is neutral and non-polar, at codon 299 of the NKX2-6 protein (p.Arg299Gly). This variant is present in population databases (rs564297816, gnomAD 0.06%), and has an allele count higher than expected for a pathogenic variant. This variant has not been reported in the literature in individuals affected with NKX2-6-related conditions. ClinVar contains an entry for this variant (Variation ID: 653156). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant¬†is likely to be tolerated. 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. -

not provided

Uncertain:1

Breakthrough Genomics, Breakthrough Genomics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: not provided

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.18

BayesDel_addAF

Benign

-0.16

BayesDel_noAF

Benign

-0.10

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.65

Eigen

Benign

-0.19

Eigen_PC

Benign

-0.31

FATHMM_MKL

Benign

0.36

LIST_S2

Benign

0.81

M_CAP

Uncertain

0.21

MetaRNN

Benign

0.060

MetaSVM

Uncertain

-0.010

MutationAssessor

Uncertain

2.8

PrimateAI

Uncertain

0.68

PROVEAN

Pathogenic

-5.2

REVEL

Uncertain

0.45

Sift

Uncertain

0.012

Sift4G

Uncertain

0.0080

Polyphen

0.89

Vest4

0.23

MutPred

0.40

Loss of MoRF binding (P = 6e-04);

MVP

0.51

MPC

0.65

ClinPred

0.26

GERP RS

1.0

Varity_R

0.23

gMVP

0.59

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