1-207323654-T-G

Variant names:

• chr1-207323654-T-G
• rs2782828
• NM_000574.5:c.287-905T>G

Variant summary

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

The NM_000574.5(CD55):​c.287-905T>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.765 in 152,118 control chromosomes in the GnomAD database, including 45,879 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 0.77 (45879 hom., cov: 32)
• Consequence: CD55 NM_000574.5 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.667

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=-0.82).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.928 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CD55	NM_000574.5	c.287-905T>G		intron_variant	Intron 2 of 9	ENST00000367064.9	NP_000565.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CD55	ENST00000367064.9	c.287-905T>G		intron_variant	Intron 2 of 9	1	NM_000574.5	ENSP00000356031.4

Frequencies

GnomAD3 genomes AF: 0.765 AC: 116282 AN: 152000 Hom.: 45821 Cov.: 32

Gnomad AFR AF: 0.936

Gnomad AMI AF: 0.814

Gnomad AMR AF: 0.722

Gnomad ASJ AF: 0.869

Gnomad EAS AF: 0.424

Gnomad SAS AF: 0.578

Gnomad FIN AF: 0.752

Gnomad MID AF: 0.845

Gnomad NFE AF: 0.705

Gnomad OTH AF: 0.780

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

GnomAD4 genome AF: 0.765 AC: 116405 AN: 152118 Hom.: 45879 Cov.: 32 AF XY: 0.760 AC XY: 56467 AN XY: 74346

Gnomad4 AFR AF: 0.936

Gnomad4 AMR AF: 0.722

Gnomad4 ASJ AF: 0.869

Gnomad4 EAS AF: 0.425

Gnomad4 SAS AF: 0.579

Gnomad4 FIN AF: 0.752

Gnomad4 NFE AF: 0.705

Gnomad4 OTH AF: 0.779

Alfa AF: 0.697 Hom.: 2655

Bravo AF: 0.772

Asia WGS AF: 0.501 AC: 1749 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.82
CADD	Benign	0.93
DANN	Benign	0.34

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: rs2782828; hg19: chr1-207496999;