rs138545772

Variant names:

Variant summary

Our verdict is Benign. The variant received -13 ACMG points: 0P and 13B. BP4_StrongBP6BS1BS2

The NM_003924.4(PHOX2B):c.832G>A(p.Gly278Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000131 in 1,601,192 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 Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G278V) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00072 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000070 ( 0 hom. )

Consequence

PHOX2B
NM_003924.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:7

Conservation

PhyloP100: 1.74

Publications

2 publications found

Variant links:

COSMIC-nc: COSV99891844

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 Gene-Disease associations (from GenCC):

central hypoventilation syndrome, congenital, 1, with or without Hirschsprung disease
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), ClinGen, G2P
Haddad syndrome
Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, ClinGen
neuroblastoma, susceptibility to, 2
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, G2P
congenital central hypoventilation syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

PHOX2B links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -13 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0075359344).

BP6

Variant 4-41745920-C-T is Benign according to our data. Variant chr4-41745920-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 239596.We mark this variant Likely_benign, oryginal submission is: [Conflicting_classifications_of_pathogenicity].

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.000719 (109/151512) while in subpopulation AFR AF = 0.00256 (106/41486). AF 95% confidence interval is 0.00216. There are 0 homozygotes in GnomAd4. There are 45 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High AC in GnomAd4 at 109 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PHOX2B	NM_003924.4 link	c.832G>A	p.Gly278Ser	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.832G>A	p.Gly278Ser	missense_variant	Exon 3 of 3	1	NM_003924.4	ENSP00000226382.2		Q99453
PHOX2B	ENST00000510424.2 link	n.*113G>A		downstream_gene_variant		3

Frequencies

GnomAD3 genomes

AF:

0.000720

AC:

109

AN:

151404

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00256

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000657

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:

0.00

Gnomad OTH

AF:

0.000959

GnomAD2 exomes

AF:

0.000199

AC:

AN:

225632

AF XY:

0.000137

show subpopulations

Gnomad AFR exome

AF:

0.00332

Gnomad AMR exome

AF:

0.0000311

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000199

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000697

AC:

101

AN:

1449680

Hom.:

Cov.:

AF XY:

0.0000610

AC XY:

AN XY:

721216

show subpopulations

African (AFR)

AF:

0.00260

AC:

AN:

32314

American (AMR)

AF:

0.0000456

AC:

AN:

43828

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25742

East Asian (EAS)

AF:

0.00

AC:

AN:

38578

South Asian (SAS)

AF:

0.00

AC:

AN:

84964

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52046

Middle Eastern (MID)

AF:

0.000180

AC:

AN:

5552

European-Non Finnish (NFE)

AF:

0.00000271

AC:

AN:

1106882

Other (OTH)

AF:

0.000184

AC:

AN:

59774

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.480

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.000719

AC:

109

AN:

151512

Hom.:

Cov.:

AF XY:

0.000608

AC XY:

AN XY:

74040

show subpopulations

African (AFR)

AF:

0.00256

AC:

106

AN:

41486

American (AMR)

AF:

0.0000656

AC:

AN:

15240

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5152

South Asian (SAS)

AF:

0.00

AC:

AN:

4824

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10298

Middle Eastern (MID)

AF:

0.00

AC:

AN:

292

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67732

Other (OTH)

AF:

0.000949

AC:

AN:

2108

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.499

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.000215

Hom.:

Bravo

AF:

0.000729

ESP6500AA

AF:

0.00342

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000257

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:7

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:2

May 22, 2020

GeneDx

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Has not been previously published as pathogenic or benign to our knowledge; In silico analysis supports that this missense variant does not alter protein structure/function -

May 19, 2023

Revvity Omics, Revvity

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Hereditary cancer-predisposing syndrome

Benign:2

Nov 21, 2018

Ambry Genetics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Jun 30, 2021

Sema4, Sema4

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:curation

- -

not specified

Benign:1

Oct 07, 2024

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Neuroblastoma, susceptibility to, 2

Benign:1

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Haddad syndrome

Benign:1

Oct 26, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

PHOX2B-related disorder

Benign:1

Dec 24, 2021

PreventionGenetics, part of Exact Sciences

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Congenital central hypoventilation

Benign:1

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Benign

-0.25

BayesDel_noAF

Benign

-0.13

CADD

Benign

(source)

DANN

Uncertain

0.98

DEOGEN2

Benign

0.21

Eigen

Benign

-0.63

Eigen_PC

Benign

-0.45

FATHMM_MKL

Uncertain

0.90

LIST_S2

Benign

0.73

M_CAP

Pathogenic

0.70

MetaRNN

Benign

0.0075

MetaSVM

Benign

-0.53

MutationAssessor

Benign

0.63

PhyloP100

1.7

PrimateAI

Pathogenic

0.96

PROVEAN

Benign

-0.28

REVEL

Uncertain

0.35

Sift

Uncertain

0.0050

Sift4G

Uncertain

0.043

Polyphen

0.034

Vest4

0.27

MVP

0.81

MPC

1.1

ClinPred

0.033

GERP RS

2.9

Varity_R

0.26

gMVP

0.56

Mutation Taster

=56/44

polymorphism

(source)

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

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rs138545772

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over