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NM_001110792.2(MECP2):c.424A>G (p.Lys142Glu) AND Severe neonatal-onset encephalopathy with microcephaly

Germline classification:
Uncertain significance (1 submission)
Last evaluated:
Apr 6, 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:
RCV003640266.2

Allele description [Variation Report for NM_001110792.2(MECP2):c.424A>G (p.Lys142Glu)]

NM_001110792.2(MECP2):c.424A>G (p.Lys142Glu)

Gene:
MECP2:methyl-CpG binding protein 2 [Gene - OMIM - HGNC]
Variant type:
single nucleotide variant
Cytogenetic location:
Xq28
Genomic location:
Preferred name:
NM_001110792.2(MECP2):c.424A>G (p.Lys142Glu)
HGVS:
  • NC_000023.11:g.154031440T>C
  • NG_007107.3:g.110664A>G
  • NM_001110792.2:c.424A>GMANE SELECT
  • NM_001316337.2:c.109A>G
  • NM_001369391.2:c.109A>G
  • NM_001369392.2:c.109A>G
  • NM_001369393.2:c.109A>G
  • NM_001369394.2:c.109A>G
  • NM_001386137.1:c.-173A>G
  • NM_001386138.1:c.-173A>G
  • NM_001386139.1:c.-173A>G
  • NM_004992.4:c.388A>G
  • NP_001104262.1:p.Lys142Glu
  • NP_001303266.1:p.Lys37Glu
  • NP_001356320.1:p.Lys37Glu
  • NP_001356321.1:p.Lys37Glu
  • NP_001356322.1:p.Lys37Glu
  • NP_001356323.1:p.Lys37Glu
  • NP_004983.1:p.Lys130Glu
  • LRG_764t1:c.424A>G
  • LRG_764t2:c.388A>G
  • LRG_764:g.110664A>G
  • LRG_764p1:p.Lys142Glu
  • LRG_764p2:p.Lys130Glu
  • NC_000023.10:g.153296891T>C
Protein change:
K130E
Molecular consequence:
  • NM_001386137.1:c.-173A>G - 5 prime UTR variant - [Sequence Ontology: SO:0001623]
  • NM_001386138.1:c.-173A>G - 5 prime UTR variant - [Sequence Ontology: SO:0001623]
  • NM_001386139.1:c.-173A>G - 5 prime UTR variant - [Sequence Ontology: SO:0001623]
  • NM_001110792.2:c.424A>G - missense variant - [Sequence Ontology: SO:0001583]
  • NM_001316337.2:c.109A>G - missense variant - [Sequence Ontology: SO:0001583]
  • NM_001369391.2:c.109A>G - missense variant - [Sequence Ontology: SO:0001583]
  • NM_001369392.2:c.109A>G - missense variant - [Sequence Ontology: SO:0001583]
  • NM_001369393.2:c.109A>G - missense variant - [Sequence Ontology: SO:0001583]
  • NM_001369394.2:c.109A>G - missense variant - [Sequence Ontology: SO:0001583]
  • NM_004992.4:c.388A>G - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:
Severe neonatal-onset encephalopathy with microcephaly
Synonyms:
Encephalopathy, neonatal severe; Encephalopathy, neonatal severe, due to MECP2 mutations
Identifiers:
MONDO: MONDO:0010397; MedGen: C1968556; Orphanet: 209370; OMIM: 300673

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Assertion and evidence details

Help
Submission AccessionSubmitterReview Status
(Assertion method)		Clinical Significance
(Last evaluated)		OriginMethodCitations
SCV004451859Labcorp Genetics (formerly Invitae), Labcorp
criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))		Uncertain significance
(Apr 6, 2023) 		germlineclinical testing

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

Help

Summary from all submissions

EthnicityOriginAffectedIndividualsFamiliesChromosomes testedNumber TestedFamily historyMethod
not providedgermlineunknownnot providednot providednot providednot providednot providedclinical 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, SCV004451859.1

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not providednot providednot providednot providedclinical 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. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt MECP2 protein function. This variant has not been reported in the literature in individuals affected with MECP2-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces lysine, which is basic and polar, with glutamic acid, which is acidic and polar, at codon 130 of the MECP2 protein (p.Lys130Glu).

#SampleMethodObservation
OriginAffectedNumber testedTissuePurposeMethodIndividualsAllele frequencyFamiliesCo-occurrences
1germlineunknownnot providednot providednot providednot providednot providednot providednot provided

Last Updated: Sep 29, 2024