X-154031044-G-C

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 4P and 2B. PM1PM2BP4_Moderate

The NM_001110792.2(MECP2):c.820C>G(p.Gln274Glu) variant causes a missense change. The variant allele was found at a frequency of 0.00000364 in 1,098,093 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. Q274R) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 23)

Exomes 𝑓: 0.0000036 ( 0 hom. 0 hem. )

Consequence

MECP2
NM_001110792.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.16

Publications

11 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: Uncertain_significance. The variant received 2 ACMG points.

PM1

In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 2 benign, 17 uncertain in NM_001110792.2

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.2538197).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MECP2	NM_001110792.2 link	c.820C>G	p.Gln274Glu	missense_variant	Exon 3 of 3	ENST00000453960.7	NP_001104262.1
MECP2	NM_004992.4 link	c.784C>G	p.Gln262Glu	missense_variant	Exon 4 of 4	ENST00000303391.11	NP_004983.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MECP2	ENST00000453960.7 link	c.820C>G	p.Gln274Glu	missense_variant	Exon 3 of 3	1	NM_001110792.2	ENSP00000395535.2
MECP2	ENST00000303391.11 link	c.784C>G	p.Gln262Glu	missense_variant	Exon 4 of 4	1	NM_004992.4	ENSP00000301948.6

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.0000110

AC:

AN:

182605

AF XY:

0.00

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000246

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000364

AC:

AN:

1098093

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

363477

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

26394

American (AMR)

AF:

0.00

AC:

AN:

35199

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19382

East Asian (EAS)

AF:

0.00

AC:

AN:

30204

South Asian (SAS)

AF:

0.00

AC:

AN:

54144

European-Finnish (FIN)

AF:

0.00

AC:

AN:

40492

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4137

European-Non Finnish (NFE)

AF:

0.00000475

AC:

AN:

842053

Other (OTH)

AF:

0.00

AC:

AN:

46088

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.513

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

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

Cov.:

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Jan 12, 2016

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.13

BayesDel_addAF

Uncertain

0.093

BayesDel_noAF

Uncertain

-0.050

CADD

Benign

(source)

DANN

Benign

0.92

DEOGEN2

Uncertain

0.45

T;.;T

FATHMM_MKL

Uncertain

0.97

LIST_S2

Uncertain

0.94

D;D;D

M_CAP

Pathogenic

0.75

MetaRNN

Benign

0.25

T;T;T

MetaSVM

Uncertain

-0.28

MutationAssessor

Benign

1.6

L;.;.

PhyloP100

5.2

PrimateAI

Uncertain

0.60

PROVEAN

Benign

-0.10

N;N;.

REVEL

Uncertain

0.39

Sift

Uncertain

0.018

D;D;.

Sift4G

Benign

0.88

T;T;T

Vest4

0.17

ClinPred

0.19

GERP RS

5.6

Varity_R

0.19

gMVP

0.88

Mutation Taster

=67/33

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

Details are displayed if max score is > 0.2

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

Publications

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over