chr8-23702684-G-A

Position:

chr8-23702684-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_001136271.3(NKX2-6):c.673C>T(p.Pro225Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000464 in 1,550,828 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000046 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000046 ( 0 hom. )

Consequence

NKX2-6
NM_001136271.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.365

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:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.08878499).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
NKX2-6	NM_001136271.3 linkuse as main transcript	c.673C>T	p.Pro225Ser	missense_variant	2/2	ENST00000325017.4
LOC107986930	XR_001745842.2 linkuse as main transcript	n.1312+33934G>A		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
NKX2-6	ENST00000325017.4 linkuse as main transcript	c.673C>T	p.Pro225Ser	missense_variant	2/2	2	NM_001136271.3	P1

Frequencies

GnomAD3 genomes

AF:

0.0000460

AC:

AN:

152154

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000103

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000132

AC:

AN:

151376

Hom.:

AF XY:

0.0000124

AC XY:

AN XY:

80644

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000173

Gnomad OTH exome

AF:

0.000233

GnomAD4 exome

AF:

0.0000465

AC:

AN:

1398674

Hom.:

Cov.:

AF XY:

0.0000362

AC XY:

AN XY:

689848

show subpopulations

Gnomad4 AFR exome

AF:

0.0000317

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:

0.0000584

Gnomad4 OTH exome

AF:

0.0000172

GnomAD4 genome

AF:

0.0000460

AC:

AN:

152154

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74318

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000103

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000711

Hom.:

Bravo

AF:

0.0000416

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Conotruncal heart malformations

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 30, 2019

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. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site, but this prediction has not been confirmed by published transcriptional studies. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0"). This variant has not been reported in the literature in individuals with NKX2-6-related conditions. This variant is not present in population databases (ExAC no frequency). This sequence change replaces proline with serine at codon 225 of the NKX2-6 protein (p.Pro225Ser). The proline residue is weakly conserved and there is a moderate physicochemical difference between proline and serine. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.073

BayesDel_addAF

Benign

-0.087

BayesDel_noAF

Benign

-0.35

CADD

Benign

5.6

DANN

Uncertain

0.98

DEOGEN2

Benign

0.033

Eigen

Benign

-0.91

Eigen_PC

Benign

-1.1

FATHMM_MKL

Benign

0.25

LIST_S2

Benign

0.57

M_CAP

Benign

0.012

MetaRNN

Benign

0.089

MetaSVM

Benign

-0.61

MutationAssessor

Benign

0.69

MutationTaster

Benign

1.0

N;N

PrimateAI

Uncertain

0.50

PROVEAN

Benign

0.0

REVEL

Benign

0.12

Sift

Uncertain

0.022

Sift4G

Benign

0.73

Polyphen

0.75

Vest4

0.20

MutPred

0.25

Gain of glycosylation at P225 (P = 0.0231);

MVP

0.18

MPC

0.45

ClinPred

0.081

GERP RS

0.50

Varity_R

0.053

gMVP

0.38

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