chrX-154031446-G-C

Variant names:

• chrX-154031446-G-C
• rs267608469
• NM_001110792.2:c.418C>G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_001110792.2(MECP2):​c.418C>G​(p.Gln140Glu) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 23)
  • Exomes 𝑓: 9.1e-7 (0 hom. 1 hem.)
  • Failed GnomAD Quality Control
• Consequence: MECP2 NM_001110792.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 5.19

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 Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MECP2	NM_001110792.2	c.418C>G	p.Gln140Glu	missense_variant	Exon 3 of 3	ENST00000453960.7	NP_001104262.1
MECP2	NM_004992.4	c.382C>G	p.Gln128Glu	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	c.418C>G	p.Gln140Glu	missense_variant	Exon 3 of 3	1	NM_001110792.2	ENSP00000395535.2
MECP2	ENST00000303391.11	c.382C>G	p.Gln128Glu	missense_variant	Exon 4 of 4	1	NM_004992.4	ENSP00000301948.6

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Data not reliable, filtered out with message: AS_VQSR AF: 9.11e-7 AC: 1 AN: 1097568 Hom.: 0 Cov.: 33 AF XY: 0.00000276 AC XY: 1 AN XY: 362938

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000185

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 23

ExAC AF: 0.0000165 AC: 2

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.14
BayesDel_addAF	Pathogenic	0.20	D
BayesDel_noAF	Uncertain	0.050
CADD	Benign	19
DANN	Benign	0.95
DEOGEN2	Uncertain	0.69	D;.;T;T;T;T;T
FATHMM_MKL	Uncertain	0.84	D
LIST_S2	Uncertain	0.86	D;D;D;D;T;D;D
M_CAP	Pathogenic	0.82	D
MetaRNN	Uncertain	0.56	D;D;D;D;D;D;D
MetaSVM	Uncertain	0.61	D
MutationAssessor	Benign	-0.61	N;.;.;.;.;.;.
PrimateAI	Uncertain	0.55	T
PROVEAN	Benign	-0.78	N;N;.;.;.;.;.
REVEL	Uncertain	0.55
Sift	Benign	0.46	T;T;.;.;.;.;.
Sift4G	Benign	1.0	T;T;T;T;.;T;T
Polyphen		0.0090	B;B;.;.;.;.;.
Vest4		0.085
MutPred		0.50		Loss of MoRF binding (P = 0.0452);.;Loss of MoRF binding (P = 0.0452);.;Loss of MoRF binding (P = 0.0452);.;.;
MVP		0.83
ClinPred		0.60	D
GERP RS		5.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.54
gMVP		0.69

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

LitVar

Other links and lift over

dbSNP: rs267608469; hg19: chrX-153296897;