NM_003924.4(PHOX2B):c.797C>T (p.Ala266Val) AND Haddad syndrome

Germline classification:: Uncertain significance (1 submission)
Last evaluated:: Jan 26, 2021
Review status:: 1 star out of maximum of 4 stars
criteria provided, single submitter

Somatic classification of clinical impact:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Somatic classification of oncogenicity:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Record status:: current
Accession:: RCV002232978.14

Allele description [Variation Report for NM_003924.4(PHOX2B):c.797C>T (p.Ala266Val)]

NM_003924.4(PHOX2B):c.797C>T (p.Ala266Val)

Gene:

PHOX2B:paired like homeobox 2B [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

4p13

Genomic location:

Preferred name:

NM_003924.4(PHOX2B):c.797C>T (p.Ala266Val)

HGVS:

NC_000004.12:g.41745955G>A
NG_008243.1:g.8016C>T
NG_053075.1:g.81G>A
NM_003924.4:c.797C>TMANE SELECT
NP_003915.2:p.Ala266Val
NP_003915.2:p.Ala266Val
LRG_513t1:c.797C>T
LRG_513:g.8016C>T
LRG_513p1:p.Ala266Val
NC_000004.11:g.41747972G>A
NM_003924.3:c.797C>T

Protein change:

A266V

Links:

dbSNP: rs745709595

NCBI 1000 Genomes Browser:

rs745709595

Molecular consequence:

NM_003924.4:c.797C>T - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:: Haddad syndrome (OHD)
Synonyms:: Ondine-Hirschsprung disease
Identifiers:: MONDO: MONDO:0020493; MedGen: C1859049; Orphanet: 99803

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV000834065	Labcorp Genetics (formerly Invitae), Labcorp	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (Jan 26, 2021)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV000834065

Labcorp Genetics (formerly Invitae), Labcorp

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Uncertain significance
(Jan 26, 2021)

germline

clinical testing

PubMed (1)
[See all records that cite this PMID]

Help

Summary from all submissions

Ethnicity	Origin	Affected	Individuals	Families	Chromosomes tested	Number Tested	Family history	Method
not provided	germline	unknown	not provided	not provided	not provided	not provided	not provided	clinical testing

Citations

PubMed

Sherloc: a comprehensive refinement of the ACMG-AMP variant classification criteria.

Nykamp K, Anderson M, Powers M, Garcia J, Herrera B, Ho YY, Kobayashi Y, Patil N, Thusberg J, Westbrook M; Invitae Clinical Genomics Group., Topper S.

Genet Med. 2017 Oct;19(10):1105-1117. doi: 10.1038/gim.2017.37. Epub 2017 May 11. Erratum in: Genet Med. 2020 Jan;22(1):240. doi: 10.1038/s41436-019-0624-9.

PubMed [citation]

PMID:: 28492532
PMCID:: PMC5632818

Details of each submission

From Labcorp Genetics (formerly Invitae), Labcorp, SCV000834065.5

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (1)

Description

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. Experimental studies and prediction algorithms are not available or were not evaluated, and the functional significance of this variant is currently unknown. This variant has not been reported in the literature in individuals with PHOX2B-related conditions. This variant is present in population databases (rs745709595, ExAC 0.02%). This sequence change replaces alanine with valine at codon 266 of the PHOX2B protein (p.Ala266Val). The alanine residue is moderately conserved and there is a small physicochemical difference between alanine and valine.

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

Last Updated: Nov 3, 2024

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