8-6509781-A-G

Variant names:

• chr8-6509781-A-G
• rs2442635
• NM_024596.5:c.2214+9852A>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.2214+9852A>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.45 in 151,980 control chromosomes in the GnomAD database, including 15,746 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 0.45 (15746 hom., cov: 32)
• Consequence: MCPH1 NM_024596.5 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.143
• Publications: 7 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=-0.95).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.493 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MCPH1	NM_024596.5	c.2214+9852A>G		intron_variant	Intron 12 of 13	ENST00000344683.10	NP_078872.3
ANGPT2	NM_001118887.2	c.1197-719T>C		intron_variant	Intron 7 of 8	ENST00000629816.3	NP_001112359.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MCPH1	ENST00000344683.10	c.2214+9852A>G		intron_variant	Intron 12 of 13	1	NM_024596.5	ENSP00000342924.5
ANGPT2	ENST00000629816.3	c.1197-719T>C		intron_variant	Intron 7 of 8	1	NM_001118887.2	ENSP00000486858.2

Frequencies

GnomAD3 genomes AF: 0.450 AC: 68381 AN: 151862 Hom.: 15743 Cov.: 32

Gnomad AFR AF: 0.499

Gnomad AMI AF: 0.374

Gnomad AMR AF: 0.349

Gnomad ASJ AF: 0.442

Gnomad EAS AF: 0.224

Gnomad SAS AF: 0.405

Gnomad FIN AF: 0.435

Gnomad MID AF: 0.525

Gnomad NFE AF: 0.467

Gnomad OTH AF: 0.468

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

GnomAD4 genome AF: 0.450 AC: 68411 AN: 151980 Hom.: 15746 Cov.: 32 AF XY: 0.445 AC XY: 33047 AN XY: 74290

African (AFR) AF: 0.499 AC: 20672 AN: 41436

American (AMR) AF: 0.349 AC: 5331 AN: 15282

Ashkenazi Jewish (ASJ) AF: 0.442 AC: 1531 AN: 3466

East Asian (EAS) AF: 0.224 AC: 1161 AN: 5176

South Asian (SAS) AF: 0.403 AC: 1941 AN: 4820

European-Finnish (FIN) AF: 0.435 AC: 4586 AN: 10546

Middle Eastern (MID) AF: 0.531 AC: 155 AN: 292

European-Non Finnish (NFE) AF: 0.467 AC: 31714 AN: 67938

Other (OTH) AF: 0.464 AC: 980 AN: 2114

Alfa AF: 0.454 Hom.: 26279

Bravo AF: 0.447

Asia WGS AF: 0.299 AC: 1043 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.95
CADD	Benign	1.4
DANN	Benign	0.49
PhyloP100		-0.14
Mutation Taster		=100/0	polymorphism (auto)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs2442635; hg19: chr8-6367302;