rs745709595

Variant names:

• chr4-41745955-G-A
• rs745709595
• NM_003924.4:c.797C>T

Your query was ambiguous. Multiple possible variants found:

• chr4-41745955-G-A
• chr4-41745955-G-C

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_003924.4(PHOX2B):​c.797C>T​(p.Ala266Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000767 in 1,303,484 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 (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A266S) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 7.7e-7 (0 hom.)
• Consequence: PHOX2B NM_003924.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 2.45
• Publications: 0 publications found

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, ClinGen, Labcorp Genetics (formerly Invitae), G2P
• Haddad syndrome

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet
• 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

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.23991314).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_003924.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PHOX2B	NM_003924.4	MANE Select	c.797C>T	p.Ala266Val	missense	Exon 3 of 3	NP_003915.2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PHOX2B	ENST00000226382.4	TSL:1 MANE Select	c.797C>T	p.Ala266Val	missense	Exon 3 of 3	ENSP00000226382.2	Q99453
	PHOX2B	ENST00000510424.2	TSL:3	n.*78C>T		downstream_gene	N/A

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000678 AC: 1 AN: 147436 AF XY: 0.00

Gnomad AFR exome AF: 0.000161

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 7.67e-7 AC: 1 AN: 1303484 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 643464

African (AFR) AF: 0.0000356 AC: 1 AN: 28102

American (AMR) AF: 0.00 AC: 0 AN: 31144

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 22046

East Asian (EAS) AF: 0.00 AC: 0 AN: 31076

South Asian (SAS) AF: 0.00 AC: 0 AN: 60966

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 43256

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4354

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1030324

Other (OTH) AF: 0.00 AC: 0 AN: 52216

GnomAD4 genome Cov.: 32

Alfa AF: 0.0000712 Hom.: 0

Bravo AF: 0.00000756

ExAC AF: 0.00000868 AC: 1

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	1	-	Haddad syndrome (1)
-	1	-	Hereditary cancer-predisposing syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.16
BayesDel_addAF	Uncertain	0.059	T
BayesDel_noAF	Benign	-0.15
CADD	Uncertain	23
DANN	Uncertain	1.0
DEOGEN2	Benign	0.18	T
Eigen	Benign	-0.076
Eigen_PC	Benign	0.032
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Benign	0.53	T
M_CAP	Pathogenic	0.49	D
MetaRNN	Benign	0.24	T
MetaSVM	Benign	-0.40	T
MutationAssessor	Benign	0.0	N
PhyloP100		2.5
PrimateAI	Pathogenic	0.93	D
PROVEAN	Benign	-0.060	N
REVEL	Uncertain	0.35
Sift	Uncertain	0.020	D
Sift4G	Benign	0.18	T
Polyphen		0.84	P
Vest4		0.29
MutPred		0.35		Gain of sheet (P = 0.0043)
MVP		0.81
MPC		1.1
ClinPred		0.19	T
GERP RS		3.7
Varity_R		0.14
gMVP		0.58
Mutation Taster		=82/18	polymorphism

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

Other links and lift over

dbSNP: rs745709595; hg19: chr4-41747972;