X-154031078-G-C

Variant names:

• chrX-154031078-G-C
• rs61748424
• NM_001110792.2:c.786C>G

Variant summary

Our verdict is Benign. The variant received -17 ACMG points: 0P and 17B. BP4_Strong BP6_Very_Strong BP7 BS2

The NM_001110792.2(MECP2):​c.786C>G​(p.Arg262Arg) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000908 in 1,210,931 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 4 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. R262R) has been classified as Likely benign.

• Frequency:
  • Genomes: 𝑓 0.0000089 (0 hom., 0 hem., cov: 23)
  • Exomes 𝑓: 0.0000091 (0 hom. 4 hem.)
• Consequence: MECP2 NM_001110792.2 synonymous
• Clinical Significance: Likely benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: 0.108
• Publications: 2 publications found

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

ACMG classification

Our verdict: Benign. The variant received -17 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.55).
• BP6: Variant X-154031078-G-C is Benign according to our data. Variant chrX-154031078-G-C is described in ClinVar as Likely_benign. ClinVar VariationId is 1669228.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP7: Synonymous conserved (PhyloP=0.108 with no splicing effect.
• BS2: High AC in GnomAdExome4 at 10 XL,Unknown,AD gene.

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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MECP2	NM_001110792.2	MANE Select	c.786C>G	p.Arg262Arg	synonymous	Exon 3 of 3	NP_001104262.1	A0A140VKC4
	MECP2	NM_004992.4	MANE Plus Clinical	c.750C>G	p.Arg250Arg	synonymous	Exon 4 of 4	NP_004983.1	D3YJ43
	MECP2	NM_001316337.2		c.471C>G	p.Arg157Arg	synonymous	Exon 5 of 5	NP_001303266.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MECP2	ENST00000453960.7	TSL:1 MANE Select	c.786C>G	p.Arg262Arg	synonymous	Exon 3 of 3	ENSP00000395535.2	P51608-2
	MECP2	ENST00000303391.11	TSL:1 MANE Plus Clinical	c.750C>G	p.Arg250Arg	synonymous	Exon 4 of 4	ENSP00000301948.6	P51608-1
	MECP2	ENST00000630151.3	TSL:5	c.750C>G	p.Arg250Arg	synonymous	Exon 4 of 4	ENSP00000486089.2	P51608-1

Frequencies

GnomAD3 genomes AF: 0.00000886 AC: 1 AN: 112829 Hom.: 0 Cov.: 23

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

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: 0.0000188

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.00000911 AC: 10 AN: 1098102 Hom.: 0 Cov.: 35 AF XY: 0.0000110 AC XY: 4 AN XY: 363466

African (AFR) AF: 0.00 AC: 0 AN: 26398

American (AMR) AF: 0.0000284 AC: 1 AN: 35205

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 19384

East Asian (EAS) AF: 0.00 AC: 0 AN: 30201

South Asian (SAS) AF: 0.00 AC: 0 AN: 54148

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 40524

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4137

European-Non Finnish (NFE) AF: 0.00000831 AC: 7 AN: 842012

Other (OTH) AF: 0.0000434 AC: 2 AN: 46093

GnomAD4 genome AF: 0.00000886 AC: 1 AN: 112829 Hom.: 0 Cov.: 23 AF XY: 0.00 AC XY: 0 AN XY: 34967

African (AFR) AF: 0.00 AC: 0 AN: 31054

American (AMR) AF: 0.00 AC: 0 AN: 10797

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 2654

East Asian (EAS) AF: 0.00 AC: 0 AN: 3565

South Asian (SAS) AF: 0.00 AC: 0 AN: 2765

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 6257

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 239

European-Non Finnish (NFE) AF: 0.0000188 AC: 1 AN: 53288

Other (OTH) AF: 0.00 AC: 0 AN: 1522

Alfa AF: 0.00 Hom.: 1

Bravo AF: 0.00000756

ClinVar

ClinVar submissions

Significance: Likely benign

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	-	1	not specified (1)
-	-	1	Severe neonatal-onset encephalopathy with microcephaly (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.55
CADD	Benign	5.3
DANN	Benign	0.56
PhyloP100		0.11

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

Other links and lift over

dbSNP: rs61748424; hg19: chrX-153296529;