rs28371660

Positions:

• chr1-207325930-C-G

Variant summary

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

The NM_000574.5(CD55):​c.578+209C>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0396 in 152,188 control chromosomes in the GnomAD database, including 211 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 0.040 (211 hom., cov: 32)
• Consequence: CD55 NM_000574.5 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.0580

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=-0.74).
• BA1: GnomAd4 highest subpopulation (NFE) allele frequency at 95% confidence interval = 0.0643 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CD55	NM_000574.5	c.578+209C>G		intron_variant		ENST00000367064.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CD55	ENST00000367064.9	c.578+209C>G		intron_variant		1	NM_000574.5	P2

Frequencies

GnomAD3 genomes AF: 0.0396 AC: 6027 AN: 152070 Hom.: 211 Cov.: 32

Gnomad AFR AF: 0.0120

Gnomad AMI AF: 0.00877

Gnomad AMR AF: 0.0198

Gnomad ASJ AF: 0.00432

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00601

Gnomad FIN AF: 0.0597

Gnomad MID AF: 0.00316

Gnomad NFE AF: 0.0659

Gnomad OTH AF: 0.0297

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

GnomAD4 genome AF: 0.0396 AC: 6025 AN: 152188 Hom.: 211 Cov.: 32 AF XY: 0.0378 AC XY: 2811 AN XY: 74412

Gnomad4 AFR AF: 0.0120

Gnomad4 AMR AF: 0.0197

Gnomad4 ASJ AF: 0.00432

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00581

Gnomad4 FIN AF: 0.0597

Gnomad4 NFE AF: 0.0659

Gnomad4 OTH AF: 0.0294

Alfa AF: 0.0506 Hom.: 29

Bravo AF: 0.0362

Asia WGS AF: 0.00549 AC: 19 AN: 3476

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.74
CADD	Benign	13
DANN	Benign	0.82

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: rs28371660; hg19: chr1-207499275;