1-207322436-G-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_000574.5(CD55):c.155G>T(p.Arg52Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00135 in 1,614,142 control chromosomes in the GnomAD database, including 29 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R52P) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0071 ( 14 hom., cov: 32)

Exomes 𝑓: 0.00076 ( 15 hom. )

Consequence

CD55
NM_000574.5 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:4

Conservation

PhyloP100: -3.89

Publications

9 publications found

Variant links:

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]

CD55 Gene-Disease associations (from GenCC):

protein-losing enteropathy
Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet

CD55 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0026197433).

BP6

Variant 1-207322436-G-T is Benign according to our data. Variant chr1-207322436-G-T is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 787220.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.0071 (1081/152330) while in subpopulation AFR AF = 0.0247 (1027/41574). AF 95% confidence interval is 0.0234. There are 14 homozygotes in GnomAd4. There are 509 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 14 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CD55	NM_000574.5 link	c.155G>T	p.Arg52Leu	missense_variant	Exon 2 of 10	ENST00000367064.9	NP_000565.1	P08174-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CD55	ENST00000367064.9 link	c.155G>T	p.Arg52Leu	missense_variant	Exon 2 of 10	1	NM_000574.5	ENSP00000356031.4		P08174-1

Frequencies

GnomAD3 genomes

AF:

0.00708

AC:

1077

AN:

152212

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0247

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00255

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.00575

GnomAD2 exomes

AF:

0.00187

AC:

471

AN:

251446

AF XY:

0.00154

show subpopulations

Gnomad AFR exome

AF:

0.0258

Gnomad AMR exome

AF:

0.00124

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000264

Gnomad OTH exome

AF:

0.000978

GnomAD4 exome

AF:

0.000755

AC:

1104

AN:

1461812

Hom.:

Cov.:

AF XY:

0.000642

AC XY:

467

AN XY:

727212

show subpopulations

African (AFR)

AF:

0.0279

AC:

935

AN:

33480

American (AMR)

AF:

0.00139

AC:

AN:

44716

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26132

East Asian (EAS)

AF:

0.00

AC:

AN:

39698

South Asian (SAS)

AF:

0.0000580

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00104

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.0000108

AC:

AN:

1111946

Other (OTH)

AF:

0.00139

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.474

Heterozygous variant carriers

112

167

223

279

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

102

136

170

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00710

AC:

1081

AN:

152330

Hom.:

Cov.:

AF XY:

0.00683

AC XY:

509

AN XY:

74496

show subpopulations

African (AFR)

AF:

0.0247

AC:

1027

AN:

41574

American (AMR)

AF:

0.00255

AC:

AN:

15308

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5188

South Asian (SAS)

AF:

0.00

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10624

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000441

AC:

AN:

68016

Other (OTH)

AF:

0.00569

AC:

AN:

2110

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

102

154

205

256

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

100

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00142

Hom.:

Bravo

AF:

0.00822

ESP6500AA

AF:

0.0259

AC:

114

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.00229

AC:

278

Asia WGS

AF:

0.000866

AC:

AN:

3478

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Breakthrough Genomics, Breakthrough Genomics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Feb 03, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Protein-losing enteropathy;C1292305:Cromer blood group system

Benign:1

Mar 18, 2022

Fulgent Genetics, Fulgent Genetics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

CD55-related disorder

Benign:1

Apr 01, 2019

PreventionGenetics, part of Exact Sciences

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.14

BayesDel_addAF

Benign

-0.64

BayesDel_noAF

Benign

-0.67

CADD

Benign

0.0010

(source)

DANN

Benign

0.74

DEOGEN2

Benign

0.094

T;.;T;.;.;.;.

Eigen

Benign

-1.7

Eigen_PC

Benign

-1.9

FATHMM_MKL

Benign

0.0093

LIST_S2

Benign

0.43

T;T;T;T;T;T;T

MetaRNN

Benign

0.0026

T;T;T;T;T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

-0.39

N;.;.;N;N;.;N

PhyloP100

-3.9

PrimateAI

Benign

0.23

PROVEAN

Benign

0.40

N;N;N;.;N;N;.

REVEL

Benign

0.054

Sift

Benign

0.43

T;T;T;.;T;T;.

Sift4G

Benign

0.29

T;T;T;.;T;T;.

Polyphen

0.0040

B;B;B;.;B;.;.

Vest4

0.11

MVP

0.12

MPC

0.15

ClinPred

0.0084

GERP RS

-11

Varity_R

0.23

gMVP

0.33

Mutation Taster

=98/2

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over