NM_003924.4(PHOX2B):c.767_768insGGCGGCGTCAGCGGC (p.255_258A[4]SAAAA[1]) AND Haddad syndrome

Germline classification:: Uncertain significance (1 submission)
Last evaluated:: Oct 5, 2023
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:: RCV001929006.4

Allele description [Variation Report for NM_003924.4(PHOX2B):c.767_768insGGCGGCGTCAGCGGC (p.255_258A[4]SAAAA[1])]

NM_003924.4(PHOX2B):c.767_768insGGCGGCGTCAGCGGC (p.255_258A[4]SAAAA[1])

Genes:

PHOX2B:paired like homeobox 2B [Gene - OMIM - HGNC]
LOC110011216:paired like homeobox 2b polyalanine repeat instability region [Gene]

Variant type:

Insertion

Cytogenetic location:

4p13

Genomic location:

Preferred name:

NM_003924.4(PHOX2B):c.767_768insGGCGGCGTCAGCGGC (p.255_258A[4]SAAAA[1])

HGVS:

NC_000004.12:g.41745991_41745992insACGCCGCCGCCGCTG
NG_008243.1:g.7986_7987insGGCGGCGTCAGCGGC
NG_053075.1:g.117_118insACGCCGCCGCCGCTG
NM_003924.4:c.767_768insGGCGGCGTCAGCGGCMANE SELECT
NP_003915.2:p.255_258A[4]SAAAA[1]
LRG_513:g.7986_7987insGGCGGCGTCAGCGGC
NC_000004.11:g.41748001_41748002insGCCGCTGACGCCGCC
NC_000004.11:g.41748008_41748009insACGCCGCCGCCGCTG

Links:

dbSNP: rs2153112761

NCBI 1000 Genomes Browser:

rs2153112761

Molecular consequence:

NM_003924.4:c.767_768insGGCGGCGTCAGCGGC - inframe_insertion - [Sequence Ontology: SO:0001821]

Condition(s)

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

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Nucleotide

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV002200293	Labcorp Genetics (formerly Invitae), Labcorp	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (Oct 5, 2023)	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

SCV002200293

Labcorp Genetics (formerly Invitae), Labcorp

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Uncertain significance
(Oct 5, 2023)

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, SCV002200293.3

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

Description

This variant, c.767_768insGGCGGCGTCAGCGGC, results in the insertion of 5 amino acid(s) of the PHOX2B protein (p.Ala258_Ala259insSerAlaAlaAlaAla), but otherwise preserves the integrity of the reading frame. This variant is not present in population databases (gnomAD no frequency). 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: 1423672). 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.

#	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: Sep 29, 2024

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