8-6531459-G-T

Position:

• chr8-6531459-G-T

Variant summary

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

The NM_024596.5(MCPH1):​c.2214+31530G>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.658 in 151,512 control chromosomes in the GnomAD database, including 33,242 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 0.66 (33242 hom., cov: 29)
• Consequence: MCPH1 NM_024596.5 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.0280

Genes affected

MCPH1 (HGNC:6954): (microcephalin 1) This gene encodes a DNA damage response protein. The encoded protein may play a role in G2/M checkpoint arrest via maintenance of inhibitory phosphorylation of cyclin-dependent kinase 1. Mutations in this gene have been associated with primary autosomal recessive microcephaly 1 and premature chromosome condensation syndrome. Alternatively spliced transcript variants have been described. [provided by RefSeq, Feb 2010]

ANGPT2 (HGNC:485): (angiopoietin 2) This gene belongs to the angiopoietin family of growth factors. The protein encoded by this gene is an antagonist of angiopoietin 1, and both angiopoietin 1 and angiopoietin 2 are ligands for the endothelial TEK receptor tyrosine kinase. Angiopoietin 2 is upregulated in multiple inflammatory diseases and is implicated in the direct control of inflammation-related signaling pathways. The encoded protein affects angiogenesis during embryogenesis and tumorigenesis, disrupts the vascular remodeling ability of angiopoietin 1, and may induce endothelial cell apoptosis. This gene serves a prognostic biomarker for acute respiratory distress syndrome. [provided by RefSeq, Aug 2020]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-1.03).
• BA1: GnomAd4 highest subpopulation (NFE) allele frequency at 95% confidence interval = 0.717 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MCPH1	NM_024596.5	c.2214+31530G>T		intron_variant		ENST00000344683.10	NP_078872.3
ANGPT2	NM_001118887.2	c.444+873C>A		intron_variant		ENST00000629816.3	NP_001112359.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MCPH1	ENST00000344683.10	c.2214+31530G>T		intron_variant		1	NM_024596.5	ENSP00000342924.5
ANGPT2	ENST00000629816.3	c.444+873C>A		intron_variant		1	NM_001118887.2	ENSP00000486858.2

Frequencies

GnomAD3 genomes AF: 0.659 AC: 99697 AN: 151394 Hom.: 33212 Cov.: 29

Gnomad AFR AF: 0.577

Gnomad AMI AF: 0.576

Gnomad AMR AF: 0.669

Gnomad ASJ AF: 0.683

Gnomad EAS AF: 0.537

Gnomad SAS AF: 0.522

Gnomad FIN AF: 0.666

Gnomad MID AF: 0.633

Gnomad NFE AF: 0.723

Gnomad OTH AF: 0.672

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

GnomAD4 genome AF: 0.658 AC: 99767 AN: 151512 Hom.: 33242 Cov.: 29 AF XY: 0.650 AC XY: 48116 AN XY: 73986

Gnomad4 AFR AF: 0.577

Gnomad4 AMR AF: 0.669

Gnomad4 ASJ AF: 0.683

Gnomad4 EAS AF: 0.537

Gnomad4 SAS AF: 0.520

Gnomad4 FIN AF: 0.666

Gnomad4 NFE AF: 0.723

Gnomad4 OTH AF: 0.666

Alfa AF: 0.701 Hom.: 4686

Bravo AF: 0.655

Asia WGS AF: 0.496 AC: 1725 AN: 3474

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-1.0
CADD	Benign	1.2
DANN	Benign	0.53

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: rs2515478; hg19: chr8-6388980;