rs786204313

Variant names:

• chrX-154030815-G-C
• rs786204313
• NM_001110792.2:c.1049C>G

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 2P and 6B. PM1 BP4_Moderate BS2

The NM_001110792.2(MECP2):​c.1049C>G​(p.Thr350Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000578 in 1,210,272 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T350I) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.000018 (0 hom., 0 hem., cov: 23)
  • Exomes 𝑓: 0.0000046 (0 hom. 0 hem.)
• Consequence: MECP2 NM_001110792.2 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:3
• Conservation: PhyloP100: 2.68
• Publications: 1 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: G2P, Ambry Genetics, ClinGen, Orphanet, Labcorp Genetics (formerly Invitae)
• 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: Likely_benign. The variant received -4 ACMG points.

• PM1: In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 6 benign, 13 uncertain in NM_001110792.2
• BP4: Computational evidence support a benign effect (MetaRNN=0.15062651).
• BS2: High AC in GnomAdExome4 at 5 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.1049C>G	p.Thr350Ser	missense	Exon 3 of 3	NP_001104262.1	A0A140VKC4
	MECP2	NM_004992.4	MANE Plus Clinical	c.1013C>G	p.Thr338Ser	missense	Exon 4 of 4	NP_004983.1	D3YJ43
	MECP2	NM_001316337.2		c.734C>G	p.Thr245Ser	missense	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.1049C>G	p.Thr350Ser	missense	Exon 3 of 3	ENSP00000395535.2	P51608-2
	MECP2	ENST00000303391.11	TSL:1 MANE Plus Clinical	c.1013C>G	p.Thr338Ser	missense	Exon 4 of 4	ENSP00000301948.6	P51608-1
	MECP2	ENST00000630151.3	TSL:5	c.1013C>G	p.Thr338Ser	missense	Exon 4 of 4	ENSP00000486089.2	P51608-1

Frequencies

GnomAD3 genomes AF: 0.0000179 AC: 2 AN: 112029 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: 0.0000377

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.00000546 AC: 1 AN: 183292 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000122

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000455 AC: 5 AN: 1098243 Hom.: 0 Cov.: 35 AF XY: 0.00 AC XY: 0 AN XY: 363599

African (AFR) AF: 0.00 AC: 0 AN: 26403

American (AMR) AF: 0.00 AC: 0 AN: 35207

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 19386

East Asian (EAS) AF: 0.00 AC: 0 AN: 30205

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

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 40526

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

European-Non Finnish (NFE) AF: 0.00000475 AC: 4 AN: 842133

Other (OTH) AF: 0.0000217 AC: 1 AN: 46098

GnomAD4 genome AF: 0.0000179 AC: 2 AN: 112029 Hom.: 0 Cov.: 23 AF XY: 0.00 AC XY: 0 AN XY: 34219

African (AFR) AF: 0.00 AC: 0 AN: 30828

American (AMR) AF: 0.00 AC: 0 AN: 10644

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 2655

East Asian (EAS) AF: 0.00 AC: 0 AN: 3561

South Asian (SAS) AF: 0.00 AC: 0 AN: 2715

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 6122

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 238

European-Non Finnish (NFE) AF: 0.0000377 AC: 2 AN: 53078

Other (OTH) AF: 0.00 AC: 0 AN: 1502

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000756

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	1	-	not specified (1)
-	1	-	Rett syndrome;C0796222:X-linked intellectual disability-psychosis-macroorchidism syndrome;C1845336:Autism, susceptibility to, X-linked 3;C1846058:Syndromic X-linked intellectual disability Lubs type;C1968556:Severe neonatal-onset encephalopathy with microcephaly (1)
-	1	-	Severe neonatal-onset encephalopathy with microcephaly (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.089
BayesDel_addAF	Uncertain	0.068	T
BayesDel_noAF	Benign	-0.14
CADD	Benign	16
DANN	Benign	0.93
DEOGEN2	Benign	0.27	T
FATHMM_MKL	Uncertain	0.86	D
LIST_S2	Benign	0.75	T
M_CAP	Uncertain	0.15	D
MetaRNN	Benign	0.15	T
MetaSVM	Benign	-0.50	T
MutationAssessor	Benign	1.1	L
PhyloP100		2.7
PrimateAI	Uncertain	0.57	T
PROVEAN	Benign	0.40	N
REVEL	Uncertain	0.45
Sift	Benign	0.41	T
Sift4G	Benign	0.66	T
Polyphen		0.0010	B
Vest4		0.051
MutPred		0.33		Loss of sheet (P = 0.0817)
MVP		0.98
ClinPred		0.44	T
GERP RS		4.9
Varity_R		0.13
gMVP		0.56
Mutation Taster		=93/7	polymorphism

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: rs786204313; hg19: chrX-153296266;