rs4551245

Positions:

• chr7-45006231-C-G

Variant summary

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

The NM_031443.4(CCM2):​c.30+5868C>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.144 in 152,194 control chromosomes in the GnomAD database, including 1,762 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 0.14 (1762 hom., cov: 32)
• Consequence: CCM2 NM_031443.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.373

Genes affected

CCM2 (HGNC:21708): (CCM2 scaffold protein) This gene encodes a scaffold protein that functions in the stress-activated p38 Mitogen-activated protein kinase (MAPK) signaling cascade. The protein interacts with SMAD specific E3 ubiquitin protein ligase 1 (also known as SMURF1) via a phosphotyrosine binding domain to promote RhoA degradation. The protein is required for normal cytoskeletal structure, cell-cell interactions, and lumen formation in endothelial cells. Mutations in this gene result in cerebral cavernous malformations. Multiple transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Nov 2009]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.81).
• BA1: GnomAd4 highest subpopulation (AMR) allele frequency at 95% confidence interval = 0.201 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CCM2	NM_031443.4	c.30+5868C>G		intron_variant		ENST00000258781.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CCM2	ENST00000258781.11	c.30+5868C>G		intron_variant		1	NM_031443.4	P1

Frequencies

GnomAD3 genomes AF: 0.144 AC: 21954 AN: 152076 Hom.: 1762 Cov.: 32

Gnomad AFR AF: 0.0820

Gnomad AMI AF: 0.148

Gnomad AMR AF: 0.208

Gnomad ASJ AF: 0.142

Gnomad EAS AF: 0.179

Gnomad SAS AF: 0.162

Gnomad FIN AF: 0.151

Gnomad MID AF: 0.0601

Gnomad NFE AF: 0.165

Gnomad OTH AF: 0.118

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

GnomAD4 genome AF: 0.144 AC: 21962 AN: 152194 Hom.: 1762 Cov.: 32 AF XY: 0.145 AC XY: 10779 AN XY: 74386

Gnomad4 AFR AF: 0.0819

Gnomad4 AMR AF: 0.207

Gnomad4 ASJ AF: 0.142

Gnomad4 EAS AF: 0.179

Gnomad4 SAS AF: 0.163

Gnomad4 FIN AF: 0.151

Gnomad4 NFE AF: 0.165

Gnomad4 OTH AF: 0.117

Alfa AF: 0.162 Hom.: 269

Bravo AF: 0.148

Asia WGS AF: 0.160 AC: 556 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.81
CADD	Benign	0.81
DANN	Benign	0.80

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: rs4551245; hg19: chr7-45045830;