X-154028630-C-T

Variant names:

• chrX-154028630-C-T
• rs3027922
• NM_001110792.2:c.*1737G>A

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BA1

The NM_001110792.2(MECP2):​c.*1737G>A variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0565 in 111,686 control chromosomes in the GnomAD database, including 215 homozygotes. There are 1,735 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.056 (215 hom., 1735 hem., cov: 23)
  • Exomes 𝑓: 0.0 (0 hom. 0 hem.)
  • Failed GnomAD Quality Control
• Consequence: MECP2 NM_001110792.2 3_prime_UTR
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:3
• Conservation: PhyloP100: -2.11

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 -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.89).
• BP6: Variant X-154028630-C-T is Benign according to our data. Variant chrX-154028630-C-T is described in ClinVar as [Benign]. Clinvar id is 143253.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chrX-154028630-C-T is described in Lovd as [Benign].
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.125 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MECP2	NM_001110792.2	c.*1737G>A		3_prime_UTR_variant	Exon 3 of 3	ENST00000453960.7	NP_001104262.1
MECP2	NM_004992.4	c.*1737G>A		3_prime_UTR_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	c.*1737G>A		3_prime_UTR_variant	Exon 3 of 3	1	NM_001110792.2	ENSP00000395535.2
MECP2	ENST00000303391	c.*1737G>A		3_prime_UTR_variant	Exon 4 of 4	1	NM_004992.4	ENSP00000301948.6

Frequencies

GnomAD3 genomes AF: 0.0565 AC: 6306 AN: 111631 Hom.: 215 Cov.: 23 AF XY: 0.0512 AC XY: 1732 AN XY: 33827

Gnomad AFR AF: 0.128

Gnomad AMI AF: 0.0441

Gnomad AMR AF: 0.0342

Gnomad ASJ AF: 0.00378

Gnomad EAS AF: 0.000561

Gnomad SAS AF: 0.00368

Gnomad FIN AF: 0.0147

Gnomad MID AF: 0.0127

Gnomad NFE AF: 0.0338

Gnomad OTH AF: 0.0518

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 24 Hom.: 0 Cov.: 0 AF XY: 0.00 AC XY: 0 AN XY: 8

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

GnomAD4 genome AF: 0.0565 AC: 6307 AN: 111686 Hom.: 215 Cov.: 23 AF XY: 0.0512 AC XY: 1735 AN XY: 33892

Gnomad4 AFR AF: 0.128

Gnomad4 AMR AF: 0.0341

Gnomad4 ASJ AF: 0.00378

Gnomad4 EAS AF: 0.000563

Gnomad4 SAS AF: 0.00368

Gnomad4 FIN AF: 0.0147

Gnomad4 NFE AF: 0.0338

Gnomad4 OTH AF: 0.0511

Alfa AF: 0.0480 Hom.: 283

Bravo AF: 0.0619

ClinVar

Significance: Benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Rett syndrome Benign:1

Aug 14, 2023

Centre for Population Genomics, CPG

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: curation

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). -

not specified Benign:1

Mar 10, 2010

RettBASE

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: curation

- -

not provided Benign:1

-

Breakthrough Genomics, Breakthrough Genomics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: not provided

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.89
CADD	Benign	0.20
DANN	Benign	0.54

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: rs3027922; hg19: chrX-153294081;