NM_001110792.2:c.21_23delCGC

Variant names:

Variant summary

Our verdict is Benign. Variant got -13 ACMG points: 0P and 13B. BP6_Very_StrongBS1BS2_Supporting

The NM_001110792.2(MECP2):c.21_23delCGC(p.Ala8del) variant causes a disruptive inframe deletion change. The variant allele was found at a frequency of 0.00121 in 1,005,669 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 2 hemizygotes in GnomAD. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0000094 ( 0 hom., 0 hem., cov: 21)

Exomes 𝑓: 0.0014 ( 0 hom. 2 hem. )

Consequence

MECP2
NM_001110792.2 disruptive_inframe_deletion

Scores

Not classified

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:5

Conservation

PhyloP100: 3.94

Variant links:

Genes affected

MECP2 (HGNC:6990): (methyl-CpG binding protein 2) DNA methylation is the major modification of eukaryotic genomes and plays an essential role in mammalian development. Human proteins MECP2, MBD1, MBD2, MBD3, and MBD4 comprise a family of nuclear proteins related by the presence in each of a methyl-CpG binding domain (MBD). Each of these proteins, with the exception of MBD3, is capable of binding specifically to methylated DNA. MECP2, MBD1 and MBD2 can also repress transcription from methylated gene promoters. In contrast to other MBD family members, MECP2 is X-linked and subject to X inactivation. MECP2 is dispensible in stem cells, but is essential for embryonic development. MECP2 gene mutations are the cause of most cases of Rett syndrome, a progressive neurologic developmental disorder and one of the most common causes of cognitive disability in females. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Oct 2015]

MECP2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -13 ACMG points.

BP6

Variant X-154097642-CGCG-C is Benign according to our data. Variant chrX-154097642-CGCG-C is described in ClinVar as [Likely_benign]. Clinvar id is 588643.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chrX-154097642-CGCG-C is described in Lovd as [Likely_benign].

BS1

Variant frequency is greater than expected in population amr. gnomad4_exome allele frequency = 0.00135 (1217/899102) while in subpopulation AMR AF= 0.0061 (101/16562). AF 95% confidence interval is 0.00513. There are 0 homozygotes in gnomad4_exome. There are 2 alleles in male gnomad4_exome subpopulation. This position pass quality control queck.

BS2

High Hemizygotes in GnomAdExome4 at 2 XL geneVariant has number of hemizygotes lower than other variant known as pathogenic in the gene, so the strength is limited to Supporting.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MECP2	NM_001110792.2 link	c.21_23delCGC	p.Ala8del	disruptive_inframe_deletion	Exon 1 of 3	ENST00000453960.7	NP_001104262.1	P51608-2A0A140VKC4Q59FJ6
MECP2	NM_004992.4 link	c.-140_-138delCGC		5_prime_UTR_variant	Exon 1 of 4	ENST00000303391.11	NP_004983.1	P51608-1D3YJ43Q59FJ6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MECP2	ENST00000453960.7 link	c.21_23delCGC	p.Ala8del	disruptive_inframe_deletion	Exon 1 of 3	1	NM_001110792.2	ENSP00000395535.2		P51608-2
MECP2	ENST00000303391.11 link	c.-140_-138delCGC		5_prime_UTR_variant	Exon 1 of 4	1	NM_004992.4	ENSP00000301948.6		P51608-1

Frequencies

GnomAD3 genomes

AF:

0.00000939

AC:

AN:

106535

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

30183

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000967

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00604

AC:

362

AN:

59976

Hom.:

AF XY:

0.00

AC XY:

AN XY:

15452

show subpopulations

Gnomad AFR exome

AF:

0.00875

Gnomad AMR exome

AF:

0.0101

Gnomad ASJ exome

AF:

0.00674

Gnomad EAS exome

AF:

0.00576

Gnomad SAS exome

AF:

0.00399

Gnomad FIN exome

AF:

0.00619

Gnomad NFE exome

AF:

0.00485

Gnomad OTH exome

AF:

0.00477

GnomAD4 exome

AF:

0.00135

AC:

1217

AN:

899102

Hom.:

AF XY:

0.00000725

AC XY:

AN XY:

275896

show subpopulations

Gnomad4 AFR exome

AF:

0.00210

Gnomad4 AMR exome

AF:

0.00610

Gnomad4 ASJ exome

AF:

0.00317

Gnomad4 EAS exome

AF:

0.00221

Gnomad4 SAS exome

AF:

0.00383

Gnomad4 FIN exome

AF:

0.00418

Gnomad4 NFE exome

AF:

0.000966

Gnomad4 OTH exome

AF:

0.00189

GnomAD4 genome

AF:

0.00000938

AC:

AN:

106567

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

30227

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.0000966

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Severe neonatal-onset encephalopathy with microcephaly

Benign:1

Dec 02, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Inborn genetic diseases

Benign:1

Jan 09, 2017

Ambry Genetics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

not provided

Benign:1

Mar 03, 2015

GeneDx

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Rett syndrome;C0796222:X-linked intellectual disability-psychosis-macroorchidism syndrome;C1845336:Autism, susceptibility to, X-linked 3;C1846058:Syndromic X-linked intellectual disability Lubs type;C1968556:Severe neonatal-onset encephalopathy with microcephaly

Benign:1

Dec 08, 2021

Fulgent Genetics, Fulgent Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

MECP2-related disorder

Benign:1

Sep 05, 2024

PreventionGenetics, part of Exact Sciences

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over