8-6499416-A-G

Variant names:

• chr8-6499416-A-G
• rs2442475
• NM_024596.5:c.2137-436A>G

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_024596.5(MCPH1):​c.2137-436A>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.784 in 152,086 control chromosomes in the GnomAD database, including 47,150 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 0.78 (47150 hom., cov: 31)
• Consequence: MCPH1 NM_024596.5 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.919
• Publications: 8 publications found

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]

ANGPT2 Gene-Disease associations (from GenCC):

• lymphatic malformation 10

  Inheritance: Unknown Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.89).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.879 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MCPH1	NM_024596.5	c.2137-436A>G		intron_variant	Intron 11 of 13	ENST00000344683.10	NP_078872.3
ANGPT2	NM_001118887.2	c.*3685T>C		downstream_gene_variant		ENST00000629816.3	NP_001112359.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MCPH1	ENST00000344683.10	c.2137-436A>G		intron_variant	Intron 11 of 13	1	NM_024596.5	ENSP00000342924.5
ANGPT2	ENST00000629816.3	c.*3685T>C		downstream_gene_variant		1	NM_001118887.2	ENSP00000486858.2

Frequencies

GnomAD3 genomes AF: 0.784 AC: 119159 AN: 151968 Hom.: 47105 Cov.: 31

Gnomad AFR AF: 0.886

Gnomad AMI AF: 0.797

Gnomad AMR AF: 0.717

Gnomad ASJ AF: 0.773

Gnomad EAS AF: 0.763

Gnomad SAS AF: 0.861

Gnomad FIN AF: 0.738

Gnomad MID AF: 0.876

Gnomad NFE AF: 0.740

Gnomad OTH AF: 0.796

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

GnomAD4 genome AF: 0.784 AC: 119251 AN: 152086 Hom.: 47150 Cov.: 31 AF XY: 0.786 AC XY: 58410 AN XY: 74324

African (AFR) AF: 0.886 AC: 36777 AN: 41502

American (AMR) AF: 0.716 AC: 10939 AN: 15282

Ashkenazi Jewish (ASJ) AF: 0.773 AC: 2684 AN: 3470

East Asian (EAS) AF: 0.763 AC: 3944 AN: 5170

South Asian (SAS) AF: 0.862 AC: 4157 AN: 4822

European-Finnish (FIN) AF: 0.738 AC: 7774 AN: 10534

Middle Eastern (MID) AF: 0.877 AC: 256 AN: 292

European-Non Finnish (NFE) AF: 0.740 AC: 50323 AN: 67990

Other (OTH) AF: 0.791 AC: 1672 AN: 2114

Alfa AF: 0.755 Hom.: 124005

Bravo AF: 0.788

Asia WGS AF: 0.810 AC: 2808 AN: 3470

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.89
CADD	Benign	0.078
DANN	Benign	0.66
PhyloP100		-0.92
Mutation Taster		=100/0	polymorphism (auto)

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: rs2442475; hg19: chr8-6356937;