NM_003924.4:c.929A>G

Variant names:

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 0P and 5B. BP4BS2

The NM_003924.4(PHOX2B):c.929A>G(p.Lys310Arg) variant causes a missense change. The variant allele was found at a frequency of 0.0000168 in 1,608,318 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 0.000020 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000016 ( 0 hom. )

Consequence

PHOX2B
NM_003924.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:5

Conservation

PhyloP100: 3.63

Variant links:

Genes affected

PHOX2B (HGNC:9143): (paired like homeobox 2B) The DNA-associated protein encoded by this gene is a member of the paired family of homeobox proteins localized to the nucleus. The protein functions as a transcription factor involved in the development of several major noradrenergic neuron populations and the determination of neurotransmitter phenotype. The gene product is linked to enhancement of second messenger-mediated activation of the dopamine beta-hydroylase, c-fos promoters and several enhancers, including cyclic amp-response element and serum-response element. Expansion of a 20 amino acid polyalanine tract in this protein by 5-13 aa has been associated with congenital central hypoventilation syndrome. [provided by RefSeq, Jul 2016]

PHOX2B links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -5 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.35170874).

BS2

High AC in GnomAdExome4 at 24 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PHOX2B	NM_003924.4 link	c.929A>G	p.Lys310Arg	missense_variant	Exon 3 of 3	ENST00000226382.4	NP_003915.2	Q99453

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PHOX2B	ENST00000226382.4 link	c.929A>G	p.Lys310Arg	missense_variant	Exon 3 of 3	1	NM_003924.4	ENSP00000226382.2		Q99453
PHOX2B	ENST00000510424.2 link	n.*210A>G		downstream_gene_variant		3

Frequencies

GnomAD3 genomes

AF:

0.0000199

AC:

AN:

150462

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:

0.0000444

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000827

AC:

AN:

241838

Hom.:

AF XY:

0.00000758

AC XY:

AN XY:

131910

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:

0.0000186

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000165

AC:

AN:

1457856

Hom.:

Cov.:

AF XY:

0.0000179

AC XY:

AN XY:

725242

show subpopulations

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:

0.0000216

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000199

AC:

AN:

150462

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

73506

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:

0.0000444

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000451

Hom.:

Bravo

AF:

0.0000113

ExAC

AF:

0.00000825

AC:

EpiCase

AF:

0.000109

EpiControl

AF:

0.0000594

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Neuroblastoma, susceptibility to, 2

Uncertain:1

Mar 25, 2024

Baylor Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Haddad syndrome

Uncertain:1

Jan 06, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces lysine, which is basic and polar, with arginine, which is basic and polar, at codon 310 of the PHOX2B protein (p.Lys310Arg). This variant is present in population databases (rs767873201, gnomAD 0.002%). This variant has not been reported in the literature in individuals affected with PHOX2B-related conditions. ClinVar contains an entry for this variant (Variation ID: 467752). Experimental studies and prediction algorithms are not available or were not evaluated, and the functional significance of this variant is currently unknown. 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

Jul 13, 2023

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

PHOX2B-related disorder

Uncertain:1

Mar 30, 2023

PreventionGenetics, part of Exact Sciences

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The PHOX2B c.929A>G variant is predicted to result in the amino acid substitution p.Lys310Arg. To our knowledge, this variant has not been reported in the literature. This variant is reported in 2 of ~242,000 alleles in gnomAD (http://gnomad.broadinstitute.org/variant/4-41747840-T-C). At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Hereditary cancer-predisposing syndrome

Uncertain:1

Mar 03, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.K310R variant (also known as c.929A>G), located in coding exon 3 of the PHOX2B gene, results from an A to G substitution at nucleotide position 929. The lysine at codon 310 is replaced by arginine, an amino acid with highly similar properties. This amino acid position is highly conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. 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

0.11

BayesDel_addAF

Uncertain

0.056

BayesDel_noAF

Benign

-0.14

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Benign

0.25

Eigen

Uncertain

0.31

Eigen_PC

Uncertain

0.32

FATHMM_MKL

Uncertain

0.91

LIST_S2

Benign

0.78

M_CAP

Uncertain

0.16

MetaRNN

Benign

0.35

MetaSVM

Uncertain

0.51

MutationAssessor

Benign

0.97

PrimateAI

Pathogenic

0.84

PROVEAN

Benign

-0.68

REVEL

Uncertain

0.48

Sift

Pathogenic

0.0

Sift4G

Benign

0.17

Polyphen

0.99

Vest4

0.37

MutPred

0.23

Gain of MoRF binding (P = 0.0472);

MVP

0.89

MPC

0.94

ClinPred

0.43

GERP RS

3.8

Varity_R

0.38

gMVP

0.80

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