NM_139058.3(ARX):c.443_444insGGCCGC (p.Ala155_Trp156insAlaAla) AND multiple conditions

Germline classification:: Uncertain significance (1 submission)
Last evaluated:: May 15, 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:: RCV002644499.3

Allele description [Variation Report for NM_139058.3(ARX):c.443_444insGGCCGC (p.Ala155_Trp156insAlaAla)]

NM_139058.3(ARX):c.443_444insGGCCGC (p.Ala155_Trp156insAlaAla)

Genes:

LOC109610631:aristaless related homeobox polyalanine expansion region [Gene]
ARX:aristaless related homeobox [Gene - OMIM - HGNC]

Variant type:

Insertion

Cytogenetic location:

Xp21.3

Genomic location:

Preferred name:

NM_139058.3(ARX):c.443_444insGGCCGC (p.Ala155_Trp156insAlaAla)

HGVS:

NC_000023.11:g.25013553_25013554insGGCCGC
NG_008281.1:g.7397_7398insGGCCGC
NG_052655.1:g.124_125insGGCCGC
NM_139058.3:c.443_444insGGCCGCMANE SELECT
NP_620689.1:p.Ala155_Trp156insAlaAla
NC_000023.10:g.25031668_25031669insGCGGCC
NC_000023.10:g.25031670_25031671insGGCCGC

Molecular consequence:

NM_139058.3:c.443_444insGGCCGC - inframe_insertion - [Sequence Ontology: SO:0001821]

Condition(s)

Name:: Developmental and epileptic encephalopathy, 1 (DEE1)
Synonyms:: INFANTILE SPASM SYNDROME, X-LINKED 1; X-linked infantile spasms; West's syndrome; See all synonyms [MedGen]
Identifiers:: MONDO: MONDO:0010632; MedGen: C3463992; OMIM: 308350

Name:: Intellectual disability, X-linked, with or without seizures, arx-related (XLID29)
Synonyms:: MENTAL RETARDATION, X-LINKED 29; MENTAL RETARDATION, X-LINKED 32; MENTAL RETARDATION, X-LINKED 33; See all synonyms [MedGen]
Identifiers:: MONDO: MONDO:0010317; MedGen: C0796244; Orphanet: 777; OMIM: 300419

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV003523123	Labcorp Genetics (formerly Invitae), Labcorp	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (May 15, 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

SCV003523123

Labcorp Genetics (formerly Invitae), Labcorp

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Uncertain significance
(May 15, 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, SCV003523123.2

#	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. ClinVar contains an entry for this variant (Variation ID: 2201778). This variant has not been reported in the literature in individuals affected with ARX-related conditions. The frequency data for this variant in the population databases is considered unreliable, as metrics indicate insufficient coverage at this position in the gnomAD database. This variant, c.443_444insGGCCGC, results in the insertion of 2 amino acid(s) of the ARX protein (p.Ala154_Ala155dup), but otherwise preserves the integrity of the reading frame.

#	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

ClinVar

Relating variation to medicine