2-148160797-A-T

Position:

• chr2-148160797-A-T

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_001378120.1(MBD5):​c.-924-17903A>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0256 in 152,306 control chromosomes in the GnomAD database, including 96 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.026 (96 hom., cov: 32)
• Consequence: MBD5 NM_001378120.1 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.172

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 (HGNC:):

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.85).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.064 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MBD5	NM_001378120.1	c.-924-17903A>T		intron_variant		ENST00000642680.2	NP_001365049.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MBD5	ENST00000642680.2	c.-924-17903A>T		intron_variant			NM_001378120.1	ENSP00000493871.2

Frequencies

GnomAD3 genomes AF: 0.0256 AC: 3895 AN: 152188 Hom.: 96 Cov.: 32

Gnomad AFR AF: 0.0661

Gnomad AMI AF: 0.0461

Gnomad AMR AF: 0.0179

Gnomad ASJ AF: 0.00808

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00207

Gnomad FIN AF: 0.00141

Gnomad MID AF: 0.0222

Gnomad NFE AF: 0.0107

Gnomad OTH AF: 0.0254

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.0256 AC: 3898 AN: 152306 Hom.: 96 Cov.: 32 AF XY: 0.0250 AC XY: 1860 AN XY: 74488

Gnomad4 AFR AF: 0.0661

Gnomad4 AMR AF: 0.0178

Gnomad4 ASJ AF: 0.00808

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00166

Gnomad4 FIN AF: 0.00141

Gnomad4 NFE AF: 0.0107

Gnomad4 OTH AF: 0.0251

Alfa AF: 0.0175 Hom.: 8

Bravo AF: 0.0278

Asia WGS AF: 0.00665 AC: 23 AN: 3474

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.85
CADD	Benign	4.4
DANN	Benign	0.84

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: rs10497030; hg19: chr2-148918366;