chr2-148485799-C-T

Variant names:

• chr2-148485799-C-T
• rs200985982
• NM_001378120.1:c.3602C>T

Variant summary

Our verdict is Benign. The variant received -10 ACMG points: 0P and 10B. BP4_Moderate BS1 BS2

The NM_001378120.1(MBD5):​c.3602C>T​(p.Ser1201Leu) variant causes a missense change. The variant allele was found at a frequency of 0.0000539 in 1,613,770 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. S1201S) has been classified as Likely benign.

• Frequency:
  • Genomes: 𝑓 0.000026 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000057 (0 hom.)
• Consequence: MBD5 NM_001378120.1 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:4 B:1
• Conservation: PhyloP100: 6.13
• Publications: 4 publications found

Genes affected

MBD5 (HGNC:20444): (methyl-CpG binding domain protein 5) This gene encodes a member of the methyl-CpG-binding domain (MBD) family. The MBD consists of about 70 residues and is the minimal region required for a methyl-CpG-binding protein binding specifically to methylated DNA. In addition to the MBD domain, this protein contains a PWWP domain (Pro-Trp-Trp-Pro motif), which consists of 100-150 amino acids and is found in numerous proteins that are involved in cell division, growth and differentiation. Mutations in this gene cause an autosomal dominant type of cognitive disability. The encoded protein interacts with the polycomb repressive complex PR-DUB which catalyzes the deubiquitination of a lysine residue of histone 2A. Haploinsufficiency of this gene is associated with a syndrome involving microcephaly, intellectual disabilities, severe speech impairment, and seizures. Alternatively spliced transcript variants have been found, but their full-length nature is not determined. [provided by RefSeq, Jul 2017]

MBD5 Gene-Disease associations (from GenCC):

• complex neurodevelopmental disorder

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• intellectual disability, autosomal dominant 1

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
• autosomal dominant non-syndromic intellectual disability

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Benign. The variant received -10 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.16454259).
• BS1: Variant frequency is greater than expected in population amr. GnomAd4 allele frequency = 0.0000263 (4/152130) while in subpopulation AMR AF = 0.0000655 (1/15274). AF 95% confidence interval is 0.0000117. There are 0 homozygotes in GnomAd4. There are 2 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.
• BS2: High AC in GnomAdExome4 at 83 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001378120.1. 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
	MBD5	NM_001378120.1	MANE Select	c.3602C>T	p.Ser1201Leu	missense	Exon 10 of 14	NP_001365049.1	A0A2R8YDL9
	MBD5	NM_001438854.1		c.3602C>T	p.Ser1201Leu	missense	Exon 11 of 15	NP_001425783.1
	MBD5	NM_001438856.1		c.3602C>T	p.Ser1201Leu	missense	Exon 11 of 15	NP_001425785.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MBD5	ENST00000642680.2	MANE Select	c.3602C>T	p.Ser1201Leu	missense	Exon 10 of 14	ENSP00000493871.2	A0A2R8YDL9
	MBD5	ENST00000407073.5	TSL:1	c.2903C>T	p.Ser968Leu	missense	Exon 11 of 15	ENSP00000386049.1	Q9P267-1
	MBD5	ENST00000638043.2	TSL:5	c.2903C>T	p.Ser968Leu	missense	Exon 10 of 14	ENSP00000490728.2	A0A1B0GW10

Frequencies

GnomAD3 genomes AF: 0.0000263 AC: 4 AN: 152130 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000655

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: 0.0000441

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000876 AC: 22 AN: 251014 AF XY: 0.0000516

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.000493

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000441

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000568 AC: 83 AN: 1461640 Hom.: 0 Cov.: 32 AF XY: 0.0000426 AC XY: 31 AN XY: 727116

African (AFR) AF: 0.00 AC: 0 AN: 33472

American (AMR) AF: 0.000492 AC: 22 AN: 44696

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26126

East Asian (EAS) AF: 0.00 AC: 0 AN: 39694

South Asian (SAS) AF: 0.00 AC: 0 AN: 86244

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53394

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5766

European-Non Finnish (NFE) AF: 0.0000522 AC: 58 AN: 1111866

Other (OTH) AF: 0.0000497 AC: 3 AN: 60382

GnomAD4 genome AF: 0.0000263 AC: 4 AN: 152130 Hom.: 0 Cov.: 32 AF XY: 0.0000269 AC XY: 2 AN XY: 74326

African (AFR) AF: 0.00 AC: 0 AN: 41424

American (AMR) AF: 0.0000655 AC: 1 AN: 15274

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3468

East Asian (EAS) AF: 0.00 AC: 0 AN: 5178

South Asian (SAS) AF: 0.00 AC: 0 AN: 4824

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10608

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000441 AC: 3 AN: 68034

Other (OTH) AF: 0.00 AC: 0 AN: 2092

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000718

ExAC AF: 0.0000824 AC: 10

EpiCase AF: 0.0000545

EpiControl AF: 0.0000593

ClinVar

ClinVar submissions

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
-	3	1	not provided (4)
-	1	-	Intellectual disability, autosomal dominant 1 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.23
BayesDel_addAF	Benign	-0.065	T
BayesDel_noAF	Uncertain	0.010
CADD	Pathogenic	28
DANN	Pathogenic	1.0
DEOGEN2	Benign	0.062	T
Eigen	Uncertain	0.63
Eigen_PC	Pathogenic	0.66
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Uncertain	0.95	D
M_CAP	Benign	0.026	D
MetaRNN	Benign	0.16	T
MetaSVM	Benign	-0.98	T
MutationAssessor	Benign	0.97	L
PhyloP100		6.1
PrimateAI	Uncertain	0.73	T
PROVEAN	Benign	-1.3	N
REVEL	Benign	0.25
Sift	Uncertain	0.013	D
Sift4G	Uncertain	0.020	D
Polyphen		1.0	D
Vest4		0.87
MutPred		0.24		Gain of relative solvent accessibility (P = 0.09)
MVP		0.35
MPC		0.14
ClinPred		0.21	T
GERP RS		5.5
Varity_R		0.24
gMVP		0.56
Mutation Taster		=85/15	polymorphism

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

Other links and lift over

dbSNP: rs200985982; hg19: chr2-149243368; COSMIC: COSV68697953; COSMIC: COSV68697953;