rs6662070

Positions:

• chr1-207332364-A-G

Variant summary

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

The NM_000574.5(CD55):​c.853+1068A>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.696 in 151,970 control chromosomes in the GnomAD database, including 37,303 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 0.70 (37303 hom., cov: 32)
• Consequence: CD55 NM_000574.5 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.784

Genes affected

CD55 (HGNC:2665): (CD55 molecule (Cromer blood group)) This gene encodes a glycoprotein involved in the regulation of the complement cascade. Binding of the encoded protein to complement proteins accelerates their decay, thereby disrupting the cascade and preventing damage to host cells. Antigens present on this protein constitute the Cromer blood group system (CROM). Alternative splicing results in multiple transcript variants. The predominant transcript variant encodes a membrane-bound protein, but alternatively spliced transcripts may produce soluble proteins. [provided by RefSeq, Jul 2014]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.9).
• BA1: GnomAd4 highest subpopulation (NFE) allele frequency at 95% confidence interval = 0.699 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CD55	NM_000574.5	c.853+1068A>G		intron_variant		ENST00000367064.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CD55	ENST00000367064.9	c.853+1068A>G		intron_variant		1	NM_000574.5	P2

Frequencies

GnomAD3 genomes AF: 0.696 AC: 105729 AN: 151852 Hom.: 37271 Cov.: 32

Gnomad AFR AF: 0.698

Gnomad AMI AF: 0.815

Gnomad AMR AF: 0.698

Gnomad ASJ AF: 0.860

Gnomad EAS AF: 0.424

Gnomad SAS AF: 0.572

Gnomad FIN AF: 0.752

Gnomad MID AF: 0.832

Gnomad NFE AF: 0.704

Gnomad OTH AF: 0.736

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

GnomAD4 genome AF: 0.696 AC: 105820 AN: 151970 Hom.: 37303 Cov.: 32 AF XY: 0.693 AC XY: 51445 AN XY: 74258

Gnomad4 AFR AF: 0.698

Gnomad4 AMR AF: 0.697

Gnomad4 ASJ AF: 0.860

Gnomad4 EAS AF: 0.425

Gnomad4 SAS AF: 0.573

Gnomad4 FIN AF: 0.752

Gnomad4 NFE AF: 0.704

Gnomad4 OTH AF: 0.735

Alfa AF: 0.702 Hom.: 5170

Bravo AF: 0.695

Asia WGS AF: 0.479 AC: 1662 AN: 3458

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.90
CADD	Benign	0.83
DANN	Benign	0.86

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: rs6662070; hg19: chr1-207505709;