Genetic Variant NM_001110792.2:c.968C>T (chrX-154030896-G-A) – ACMG Classification: Benign (-8 pts)

Variant summary

Our verdict is Benign. The variant received -8 ACMG points: 1P and 9B. BS2PP3BP5BS1

This summary comes from the ClinGen Evidence Repository: The allele frequency of the p.Thr311Met variant in MECP2 (NM_004992.3) is 0.022% and 0.01% in "Other" and South Asian 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.Thr311Met variant is observed in at least 2 unaffected individuals (GeneDx internal database) (BS2) and found in 2 patients with an alternate molecular basis of disease (Baylor Genetics internal database, Invitae internal database) (BP5). Computational prediction analysis tools suggests a deleterious impact; however, this information does not predict clinical significance on its own (PP3). As this variant meets 2 strong and 1 supporting benign criteria it can be classified as benign even though in silico predictions meet PP3. In summary, the p.Thr311Met variant in MECP2 is classified as benign for Rett syndrome based on the ACMG/AMP criteria (BS1, BS2, BP5). LINK:https://erepo.genome.network/evrepo/ui/classification/CA170409/MONDO:0010726/036

Frequency

Genomes: 𝑓 0.000036 ( 0 hom., 1 hem., cov: 23)

Exomes 𝑓: 0.00012 ( 0 hom. 44 hem. )

Consequence

MECP2
NM_001110792.2 missense

Scores

Clinical Significance

Benign reviewed by expert panel U:3B:10

Conservation

PhyloP100: 8.99

Publications

6 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: Labcorp Genetics (formerly Invitae), ClinGen, Ambry Genetics, Orphanet, 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: Benign. The variant received -8 ACMG points.

PP3

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

BP5

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

BS1

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

BS2

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

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001110792.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
MECP2	NM_001110792.2	MANE Select	c.968C>T	p.Thr323Met	missense	Exon 3 of 3	NP_001104262.1	A0A140VKC4
MECP2	NM_004992.4	MANE Plus Clinical	c.932C>T	p.Thr311Met	missense	Exon 4 of 4	NP_004983.1	D3YJ43
MECP2	NM_001316337.2		c.653C>T	p.Thr218Met	missense	Exon 5 of 5	NP_001303266.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
MECP2	ENST00000453960.7	TSL:1 MANE Select	c.968C>T	p.Thr323Met	missense	Exon 3 of 3	ENSP00000395535.2	P51608-2
MECP2	ENST00000303391.11	TSL:1 MANE Plus Clinical	c.932C>T	p.Thr311Met	missense	Exon 4 of 4	ENSP00000301948.6	P51608-1
MECP2	ENST00000630151.3	TSL:5	c.932C>T	p.Thr311Met	missense	Exon 4 of 4	ENSP00000486089.2	P51608-1

Frequencies

GnomAD3 genomes

AF:

0.0000356

AC:

AN:

112460

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000323

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.000378

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00418

Gnomad NFE

AF:

0.0000188

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000381

AC:

AN:

183507

AF XY:

0.0000294

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000365

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000721

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000244

Gnomad OTH exome

AF:

0.000221

GnomAD4 exome

AF:

0.000116

AC:

127

AN:

1098236

Hom.:

Cov.:

AF XY:

0.000121

AC XY:

AN XY:

363592

show subpopulations

African (AFR)

AF:

0.0000758

AC:

AN:

26400

American (AMR)

AF:

0.0000284

AC:

AN:

35207

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19386

East Asian (EAS)

AF:

0.0000331

AC:

AN:

30206

South Asian (SAS)

AF:

0.0000739

AC:

AN:

54148

European-Finnish (FIN)

AF:

0.0000987

AC:

AN:

40531

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4137

European-Non Finnish (NFE)

AF:

0.000129

AC:

109

AN:

842123

Other (OTH)

AF:

0.000130

AC:

AN:

46098

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.479

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:

0.0000356

AC:

AN:

112512

Hom.:

Cov.:

AF XY:

0.0000288

AC XY:

AN XY:

34674

show subpopulations

African (AFR)

AF:

0.0000322

AC:

AN:

31021

American (AMR)

AF:

0.00

AC:

AN:

10738

Ashkenazi Jewish (ASJ)

AF:

0.000378

AC:

AN:

2647

East Asian (EAS)

AF:

0.00

AC:

AN:

3569

South Asian (SAS)

AF:

0.00

AC:

AN:

2740

European-Finnish (FIN)

AF:

0.00

AC:

AN:

6161

Middle Eastern (MID)

AF:

0.00459

AC:

AN:

218

European-Non Finnish (NFE)

AF:

0.0000188

AC:

AN:

53204

Other (OTH)

AF:

0.00

AC:

AN:

1528

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.542

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.0000339

Hom.:

Bravo

AF:

0.0000189

ExAC

AF:

0.0000330

AC:

EpiCase

AF:

0.000164

EpiControl

AF:

0.00

ClinVar

ClinVar submissions

Significance:Benign

Revision:reviewed by expert panel

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (4)

Rett syndrome (3)

not specified (2)

Inborn genetic diseases (1)

MECP2-related disorder (1)

Severe neonatal-onset encephalopathy with microcephaly (1)

X-linked intellectual disability-psychosis-macroorchidism syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.18

BayesDel_addAF

Pathogenic

0.25

BayesDel_noAF

Pathogenic

0.33

CADD

Benign

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.61

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.96

M_CAP

Pathogenic

0.94

MetaRNN

Uncertain

0.56

MetaSVM

Uncertain

0.73

MutationAssessor

Uncertain

2.2

PhyloP100

9.0

PrimateAI

Uncertain

0.73

PROVEAN

Benign

-2.1

REVEL

Pathogenic

0.77

Sift

Pathogenic

0.0

Sift4G

Benign

0.14

Polyphen

1.0

Vest4

0.18

MVP

1.0

ClinPred

0.24

GERP RS

5.1

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.42

gMVP

0.91

Mutation Taster

=57/43

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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over