5-173232705-G-A

Position:

chr5-173232705-G-A

Variant summary

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

The NM_004387.4(NKX2-5):c.839C>T(p.Pro280Leu) variant causes a missense change. The variant allele was found at a frequency of 0.0000379 in 1,609,988 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000079 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000034 ( 0 hom. )

Consequence

NKX2-5
NM_004387.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:4

Conservation

PhyloP100: 4.43

Variant links:

Genes affected

NKX2-5 (HGNC:2488): (NK2 homeobox 5) This gene encodes a homeobox-containing transcription factor. This transcription factor functions in heart formation and development. Mutations in this gene cause atrial septal defect with atrioventricular conduction defect, and also tetralogy of Fallot, which are both heart malformation diseases. Mutations in this gene can also cause congenital hypothyroidism non-goitrous type 5, a non-autoimmune condition. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Oct 2009]

NKX2-5 links:

Genome browser will be placed here

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=0.15902731).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
NKX2-5	NM_004387.4 linkuse as main transcript	c.839C>T	p.Pro280Leu	missense_variant	2/2	ENST00000329198.5	NP_004378.1	P52952-1A0A0S2Z383
NKX2-5	NM_001166176.2 linkuse as main transcript	c.*638C>T		3_prime_UTR_variant	2/2		NP_001159648.1	P52952-2
NKX2-5	NM_001166175.2 linkuse as main transcript	c.*792C>T		3_prime_UTR_variant	2/2		NP_001159647.1	P52952-3A0A0S2Z3K2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
NKX2-5	ENST00000329198.5 linkuse as main transcript	c.839C>T	p.Pro280Leu	missense_variant	2/2	1	NM_004387.4	ENSP00000327758.4		P52952-1

Frequencies

GnomAD3 genomes

AF:

0.0000788

AC:

AN:

152262

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000589

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:

0.0000294

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.0000655

AC:

AN:

244416

Hom.:

AF XY:

0.0000823

AC XY:

AN XY:

133602

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000175

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000328

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000640

Gnomad OTH exome

AF:

0.000335

GnomAD4 exome

AF:

0.0000336

AC:

AN:

1457726

Hom.:

Cov.:

AF XY:

0.0000386

AC XY:

AN XY:

724598

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000157

Gnomad4 ASJ exome

AF:

0.0000384

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000580

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000252

Gnomad4 OTH exome

AF:

0.0000831

GnomAD4 genome

AF:

0.0000788

AC:

AN:

152262

Hom.:

Cov.:

AF XY:

0.0000941

AC XY:

AN XY:

74388

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000589

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.000478

Alfa

AF:

0.000130

Hom.:

Bravo

AF:

0.0000945

ExAC

AF:

0.0000247

AC:

EpiCase

AF:

0.000109

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

NKX2-5-related disorder

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Dec 29, 2022

The NKX2-5 c.839C>T variant is predicted to result in the amino acid substitution p.Pro280Leu. This variant was reported in an individual with accessory atrioventricular connection (Esposito et al. 2009. PubMed ID: 19533775) and in the heterozygous state in two siblings with thyroid hemiagenesis and in their unaffected father (Szczepanek-Parulska et al. 2022. PubMed ID: 35328834). This variant is reported in 0.020% of alleles in individuals of Latino descent in gnomAD (http://gnomad.broadinstitute.org/variant/5-172659708-G-A). At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Atrial septal defect 7

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 23, 2024

This sequence change replaces proline, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 280 of the NKX2-5 protein (p.Pro280Leu). This variant is present in population databases (rs761596254, gnomAD 0.02%), and has an allele count higher than expected for a pathogenic variant. This missense change has been observed in individual(s) with clinical features of NKX2-5-related conditions (PMID: 19533775, 28341588, 35328834). ClinVar contains an entry for this variant (Variation ID: 468246). 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) has been performed at Invitae for this missense variant, however the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on NKX2-5 protein function. 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

Uncertain significance, criteria provided, single submitter

clinical testing

CeGaT Center for Human Genetics Tuebingen

Dec 01, 2022

- -

Cardiovascular phenotype

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Sep 05, 2023

The p.P280L variant (also known as c.839C>T), located in coding exon 2 of the NKX2-5 gene, results from a C to T substitution at nucleotide position 839. The proline at codon 280 is replaced by leucine, an amino acid with similar properties. This alteration has been reported in an individual with accessory atrioventricular connection, and in individuals from a congenital heart disease and arrhythmia cohorts for whom clinical details were limited (Esposito G et al. Am. J. Med. Genet. A, 2009 Jul;149A:1574-7; Abou Hassan OK et al. Sci Rep. 2015 Mar;5:8848; Proost D et al. J Mol Diagn. 2017 May;19(3):445-459). This amino acid position is not well conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.088

BayesDel_addAF

Benign

-0.20

BayesDel_noAF

Benign

-0.26

CADD

Benign

DANN

Benign

0.94

DEOGEN2

Benign

0.32

Eigen

Benign

-0.53

Eigen_PC

Benign

-0.46

FATHMM_MKL

Uncertain

0.88

LIST_S2

Benign

0.50

M_CAP

Uncertain

0.18

MetaRNN

Benign

0.16

MetaSVM

Benign

-0.32

MutationAssessor

Benign

-0.050

PrimateAI

Uncertain

0.64

PROVEAN

Benign

-0.36

REVEL

Benign

0.19

Sift

Benign

0.032

Sift4G

Uncertain

0.023

Polyphen

0.0020

Vest4

0.28

MutPred

0.24

Loss of glycosylation at P280 (P = 0.0126);

MVP

0.71

MPC

0.51

ClinPred

0.057

GERP RS

3.4

Varity_R

0.069

gMVP

0.62

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