chrX-154030633-G-A

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BS2_SupportingBS1

This summary comes from the ClinGen Evidence Repository: The allele frequency of the p.Pro399Ser variant in MECP2 (NM_004992.3) is 0.01% in Latino/Admixed American sub population in gnomAD, which is high enough to meet the BS1 criteria based on thresholds defined by the ClinGen Rett/Angelman-like Expert Panel for Rett/AS-like conditions (BS1). The p.Pro399Ser variant is observed in 1 unaffected individual (internal database) (BS2_supporting). In summary, the p.Pro399Ser variant in MECP2 is classified as a Likely Benign based on the ACMG/AMP criteria (BS1, BS2_supporting). LINK:https://erepo.genome.network/evrepo/ui/classification/CA206184/MONDO:0010726/016

Frequency

Genomes: 𝑓 0.000037 ( 0 hom., 1 hem., cov: 20)

Exomes 𝑓: 0.000015 ( 0 hom. 2 hem. )

Consequence

MECP2
NM_001110792.2 missense

Scores

Clinical Significance

Likely benign reviewed by expert panel U:2B:3

Conservation

PhyloP100: 2.54

Publications

3 publications found

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 Gene-Disease associations (from GenCC):

chromosome Xq28 duplication syndrome
Inheritance: XL Classification: DEFINITIVE Submitted by: G2P
Rett syndrome
Inheritance: XL Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), Ambry Genetics, ClinGen, G2P
severe neonatal-onset encephalopathy with microcephaly
Inheritance: XL Classification: DEFINITIVE, SUPPORTIVE Submitted by: G2P, Orphanet
syndromic X-linked intellectual disability Lubs type
Inheritance: XL Classification: DEFINITIVE Submitted by: G2P
atypical Rett syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
non-syndromic X-linked intellectual disability
Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet
X-linked intellectual disability-psychosis-macroorchidism syndrome
Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet
systemic lupus erythematosus
Inheritance: Unknown Classification: SUPPORTIVE Submitted by: Orphanet

MECP2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -5 ACMG points.

BS1

For more information check the summary or visit ClinGen Evidence Repository.

BS2

For more information check the summary or visit ClinGen Evidence Repository.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MECP2	NM_001110792.2 link	c.1231C>T	p.Pro411Ser	missense_variant	Exon 3 of 3	ENST00000453960.7	NP_001104262.1	P51608-2A0A140VKC4Q59FJ6
MECP2	NM_004992.4 link	c.1195C>T	p.Pro399Ser	missense_variant	Exon 4 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.1231C>T	p.Pro411Ser	missense_variant	Exon 3 of 3	1	NM_001110792.2	ENSP00000395535.2		P51608-2
MECP2	ENST00000303391.11 link	c.1195C>T	p.Pro399Ser	missense_variant	Exon 4 of 4	1	NM_004992.4	ENSP00000301948.6		P51608-1

Frequencies

GnomAD3 genomes

AF:

0.0000370

AC:

AN:

107981

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000983

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:

0.0000580

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000171

AC:

AN:

175912

AF XY:

0.0000311

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000366

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000254

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000146

AC:

AN:

1093362

Hom.:

Cov.:

AF XY:

0.00000554

AC XY:

AN XY:

360762

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

26384

American (AMR)

AF:

0.0000284

AC:

AN:

35200

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19377

East Asian (EAS)

AF:

0.00

AC:

AN:

30197

South Asian (SAS)

AF:

0.00

AC:

AN:

54112

European-Finnish (FIN)

AF:

0.00

AC:

AN:

36614

Middle Eastern (MID)

AF:

0.00

AC:

AN:

3888

European-Non Finnish (NFE)

AF:

0.0000178

AC:

AN:

841588

Other (OTH)

AF:

0.00

AC:

AN:

46002

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.529

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000370

AC:

AN:

107981

Hom.:

Cov.:

AF XY:

0.0000329

AC XY:

AN XY:

30351

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

29503

American (AMR)

AF:

0.0000983

AC:

AN:

10174

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

2592

East Asian (EAS)

AF:

0.00

AC:

AN:

3452

South Asian (SAS)

AF:

0.00

AC:

AN:

2415

European-Finnish (FIN)

AF:

0.00

AC:

AN:

5824

Middle Eastern (MID)

AF:

0.00

AC:

AN:

236

European-Non Finnish (NFE)

AF:

0.0000580

AC:

AN:

51687

Other (OTH)

AF:

0.00

AC:

AN:

1434

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.0000302

EpiCase

AF:

0.000109

EpiControl

AF:

0.00

ClinVar

Significance: Likely benign

Submissions summary: Uncertain:2Benign:3

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Feb 08, 2013

Genetic Services Laboratory, University of Chicago

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Inborn genetic diseases

Uncertain:1

Feb 07, 2018

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The p.P399S variant (also known as c.1195C>T), located in coding exon 3 of the MECP2 gene, results from a C to T substitution at nucleotide position 1195. The proline at codon 399 is replaced by serine, an amino acid with similar properties. This amino acid position is not well conserved in available vertebrate species, and serine is the reference amino acid in other vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Severe neonatal-onset encephalopathy with microcephaly

Benign:1

Jul 01, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Rett syndrome

Benign:1

Dec 09, 2022

ClinGen Rett and Angelman-like Disorders Variant Curation Expert Panel

Significance:Likely benign

Review Status:reviewed by expert panel

Collection Method:curation

The allele frequency of the p.Pro399Ser variant in MECP2 (NM_004992.3) is 0.01% in Latino/Admixed American sub population in gnomAD, which is high enough to meet the BS1 criteria based on thresholds defined by the ClinGen Rett/Angelman-like Expert Panel for Rett/AS-like conditions (BS1). The p.Pro399Ser variant is observed in 1 unaffected individual (internal database) (BS2_supporting). In summary, the p.Pro399Ser variant in MECP2 is classified as a Likely Benign based on the ACMG/AMP criteria (BS1, BS2_supporting). -

MECP2-related disorder

Benign:1

Sep 24, 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

AlphaMissense

Benign

0.074

BayesDel_addAF

Benign

-0.12

BayesDel_noAF

Benign

-0.29

CADD

Benign

(source)

DANN

Benign

0.65

DEOGEN2

Benign

0.22

T;.

FATHMM_MKL

Uncertain

0.93

LIST_S2

Benign

0.85

D;D

M_CAP

Pathogenic

0.45

MetaRNN

Benign

0.097

T;T

MetaSVM

Benign

-0.64

MutationAssessor

Benign

-0.90

N;.

PhyloP100

2.5

PrimateAI

Uncertain

0.52

PROVEAN

Benign

1.2

N;N

REVEL

Benign

0.26

Sift

Benign

0.45

T;T

Sift4G

Benign

0.32

T;T

Polyphen

0.0010

B;B

Vest4

0.057

MutPred

0.27

Gain of phosphorylation at P399 (P = 7e-04);.;

MVP

0.88

ClinPred

0.048

GERP RS

4.7

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.085

gMVP

0.21

Mutation Taster

=97/3

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over