rs62621675

Positions:

• chrX-154030004-C-G

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 0P and 8B. BP4_Moderate BP6_Moderate BS2

The NM_001110792.2(MECP2):​c.*363G>C variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000222 in 278,913 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 19 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: 𝑓 0.00022 (0 hom., 7 hem., cov: 23)
  • Exomes 𝑓: 0.00023 (0 hom. 12 hem.)
• Consequence: MECP2 NM_001110792.2 3_prime_UTR
• Clinical Significance: Benign criteria provided, single submitter B:2
• Conservation: PhyloP100: 0.217

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]

ACMG classification

Verdict is Benign. Variant got -8 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.36).
• BP6: Variant X-154030004-C-G is Benign according to our data. Variant chrX-154030004-C-G is described in ClinVar as [Benign]. Clinvar id is 143263.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chrX-154030004-C-G is described in Lovd as [Benign].
• BS2: High Hemizygotes in GnomAd4 at 7 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MECP2	NM_001110792.2	c.*363G>C		3_prime_UTR_variant	3/3	ENST00000453960.7
MECP2	NM_004992.4	c.*363G>C		3_prime_UTR_variant	4/4	ENST00000303391.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MECP2	ENST00000303391.11	c.*363G>C		3_prime_UTR_variant	4/4	1	NM_004992.4	P1
MECP2	ENST00000453960.7	c.*363G>C		3_prime_UTR_variant	3/3	1	NM_001110792.2

Frequencies

GnomAD3 genomes AF: 0.000215 AC: 24 AN: 111517 Hom.: 0 Cov.: 23 AF XY: 0.000208 AC XY: 7 AN XY: 33711

Gnomad AFR AF: 0.0000654

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000948

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: 0.000396

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.000227 AC: 38 AN: 167343 Hom.: 0 Cov.: 0 AF XY: 0.000224 AC XY: 12 AN XY: 53643

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.000111

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000885

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000339

Gnomad4 OTH exome AF: 0.000110

GnomAD4 genome AF: 0.000215 AC: 24 AN: 111570 Hom.: 0 Cov.: 23 AF XY: 0.000207 AC XY: 7 AN XY: 33774

Gnomad4 AFR AF: 0.0000652

Gnomad4 AMR AF: 0.0000947

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000396

Gnomad4 OTH AF: 0.00

Alfa AF: 0.000142 Hom.: 0

Bravo AF: 0.000189

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Benign:1

Benign, no assertion criteria provided

curation

RettBASE

Nov 01, 2007

- -

Rett syndrome Benign:1

Benign, criteria provided, single submitter

curation

Centre for Population Genomics, CPG

Aug 14, 2023

This variant has been collected from RettBASE and curated to current modified ACMG/AMP criteria.Based on the classification scheme defined by the ClinGen Rett/Angelman-like Expert Panel for Rett/AS-like Disorders Specifications to the ACMG/AMP Variant Interpretation Guidelines VCEP 2.0, this variant is classified as Benign. At least the following criteria are met: The allele frequency of this variant in at least one population in gnomAD is higher than the 0.03% threshold defined by the ClinGen Rett/Angelman-like Expert Panel for Rett/AS-like Disorders VCEP 2.0 (BA1). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.36
CADD	Benign	12
DANN	Benign	0.86

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

LitVar

Other links and lift over

dbSNP: rs62621675; hg19: chrX-153295455;