MECP2 p.Pro405Ala

Variant names:

• chrX-154030615-G-C
• rs781786825
• NM_001110792.2:c.1249C>G
• MECP2 p.Pro417Ala

Your query was ambiguous. Multiple possible variants found:

• chrX-154030615-G-C
• chrX-154030613-GGG-AGC
• chrX-154030613-GGG-TGC
• chrX-154030613-GGG-CGC

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_004992.4(MECP2):​c.1213C>G​(p.Pro405Ala) variant causes a missense change. The variant allele was found at a frequency of 0.00000274 in 1,094,459 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 1 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P405L) has been classified as Benign. The gene MECP2 is included in the ClinGen Criteria Specification Registry.

• Frequency:
  • Genomes: 𝑓 0.0000092 (0 hom., 1 hem., cov: 22)
  • Exomes 𝑓: 0.0000027 (0 hom. 1 hem.)
  • Failed GnomAD Quality Control
• Consequence: MECP2 NM_004992.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.77
• 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: ClinGen, Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P, Orphanet
• 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

Specifications for MECP2 are available in the ClinGen Criteria Specification Registry and recommended for reference when assigning criteria.

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.28579038).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004992.4. 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.1249C>G	p.Pro417Ala	missense	Exon 3 of 3	NP_001104262.1	A0A140VKC4
	MECP2	NM_004992.4	MANE Plus Clinical	c.1213C>G	p.Pro405Ala	missense	Exon 4 of 4	NP_004983.1	D3YJ43
	MECP2	NM_001316337.2		c.934C>G	p.Pro312Ala	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.1249C>G	p.Pro417Ala	missense	Exon 3 of 3	ENSP00000395535.2	P51608-2
	MECP2	ENST00000303391.11	TSL:1 MANE Plus Clinical	c.1213C>G	p.Pro405Ala	missense	Exon 4 of 4	ENSP00000301948.6	P51608-1
	MECP2	ENST00000630151.3	TSL:5	c.1213C>G	p.Pro405Ala	missense	Exon 4 of 4	ENSP00000486089.2	P51608-1

Frequencies

GnomAD3 genomes AF: 0.00000924 AC: 1 AN: 108187 Hom.: 0 Cov.: 22

Gnomad AFR AF: 0.0000338

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: 0.00

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000169 AC: 3 AN: 177437 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000730

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.000225

GnomAD4 exome AF: 0.00000274 AC: 3 AN: 1094459 Hom.: 0 Cov.: 32 AF XY: 0.00000277 AC XY: 1 AN XY: 361363

African (AFR) AF: 0.00 AC: 0 AN: 26394

American (AMR) AF: 0.0000852 AC: 3 AN: 35194

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 19383

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

South Asian (SAS) AF: 0.00 AC: 0 AN: 54127

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 37210

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 3984

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 841917

Other (OTH) AF: 0.00 AC: 0 AN: 46049

GnomAD4 genome Data not reliable, filtered out with message: AS_VQSR AF: 0.00000924 AC: 1 AN: 108187 Hom.: 0 Cov.: 22 AF XY: 0.0000327 AC XY: 1 AN XY: 30589

African (AFR) AF: 0.0000338 AC: 1 AN: 29588

American (AMR) AF: 0.00 AC: 0 AN: 10148

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 2595

East Asian (EAS) AF: 0.00 AC: 0 AN: 3456

South Asian (SAS) AF: 0.00 AC: 0 AN: 2408

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 5734

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 236

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 51911

Other (OTH) AF: 0.00 AC: 0 AN: 1440

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000756

EpiCase AF: 0.00

EpiControl AF: 0.0000593

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Pathogenic	0.16	D
BayesDel_noAF	Pathogenic	0.19
CADD	Benign	23
DANN	Benign	0.94
DEOGEN2	Uncertain	0.47	T
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Uncertain	0.92	D
M_CAP	Uncertain	0.28	D
MetaRNN	Benign	0.29	T
MetaSVM	Benign	-0.80	T
MutationAssessor	Benign	1.0	L
PhyloP100		4.8
PrimateAI	Uncertain	0.58	T
PROVEAN	Benign	-0.94	N
REVEL	Uncertain	0.43
Sift	Uncertain	0.0020	D
Sift4G	Uncertain	0.050	T
Varity_R		0.46
gMVP		0.33
Mutation Taster		=38/62	disease causing

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

dbSNP: rs781786825;

hg19: chrX-153296066;