Genetic Variant C1QBP:p.Gly247Arg (chr17-5433125-C-G) – ACMG Classification: Likely_pathogenic (6 pts)

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM2PM5PP3_Moderate

The NM_001212.4(C1QBP):c.739G>C(p.Gly247Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,854 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 13/21 in silico tools predict a damaging outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G247W) has been classified as Pathogenic.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

C1QBP
NM_001212.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 7.78

Publications

8 publications found

Variant links:

Genes affected

C1QBP (HGNC:1243): (complement C1q binding protein) The human complement subcomponent C1q associates with C1r and C1s in order to yield the first component of the serum complement system. The protein encoded by this gene is known to bind to the globular heads of C1q molecules and inhibit C1 activation. This protein has also been identified as the p32 subunit of pre-mRNA splicing factor SF2, as well as a hyaluronic acid-binding protein. [provided by RefSeq, Jul 2008]

C1QBP links:

RPAIN (HGNC:28641): (RPA interacting protein) Predicted to enable metal ion binding activity. Acts upstream of or within several processes, including DNA metabolic process; protein import into nucleus; and response to UV. Located in PML body; cytoplasm; and fibrillar center. [provided by Alliance of Genome Resources, Apr 2022]

RPAIN links:

ENSG00000263272 (HGNC:):

ENSG00000263272 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr17-5433125-C-A is described in ClinVar as [Pathogenic]. Clinvar id is 441244.Status of the report is no_assertion_criteria_provided, 0 stars.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.936

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
C1QBP	NM_001212.4 link	c.739G>C	p.Gly247Arg	missense_variant	Exon 6 of 6	ENST00000225698.8	NP_001203.1	Q07021
RPAIN	NM_001033002.4 link	c.*554C>G		downstream_gene_variant		ENST00000381209.8	NP_001028174.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
C1QBP	ENST00000225698.8 link	c.739G>C	p.Gly247Arg	missense_variant	Exon 6 of 6	1	NM_001212.4	ENSP00000225698.4		Q07021
RPAIN	ENST00000381209.8 link	c.*554C>G		downstream_gene_variant		1	NM_001033002.4	ENSP00000370606.3		Q86UA6-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000398

AC:

AN:

251268

AF XY:

0.00000736

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461854

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727232

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33474

American (AMR)

AF:

0.00

AC:

AN:

44714

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26134

East Asian (EAS)

AF:

0.00

AC:

AN:

39698

South Asian (SAS)

AF:

0.0000116

AC:

AN:

86244

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1112008

Other (OTH)

AF:

0.00

AC:

AN:

60394

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.675

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.88

BayesDel_addAF

Pathogenic

0.43

BayesDel_noAF

Pathogenic

0.48

CADD

Pathogenic

(source)

DANN

Pathogenic

1.0

DEOGEN2

Pathogenic

0.83

D;.;D

Eigen

Pathogenic

0.96

Eigen_PC

Pathogenic

0.90

FATHMM_MKL

Uncertain

0.97

LIST_S2

Uncertain

0.91

D;D;D

M_CAP

Uncertain

0.13

MetaRNN

Pathogenic

0.94

D;D;D

MetaSVM

Uncertain

0.29

MutationAssessor

Pathogenic

3.6

H;.;.

PhyloP100

7.8

PrimateAI

Pathogenic

0.90

PROVEAN

Pathogenic

-7.6

D;.;.

REVEL

Pathogenic

0.91

Sift

Pathogenic

0.0

D;.;.

Sift4G

Uncertain

0.0050

D;D;.

Polyphen

1.0

D;.;.

Vest4

0.95

MutPred

0.80

Gain of solvent accessibility (P = 0.019);.;.;

MVP

0.72

MPC

1.1

ClinPred

1.0

GERP RS

5.6

RBP_binding_hub_radar

0.92

RBP_regulation_power_radar

2.6

Varity_R

0.93

gMVP

0.92

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

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

ClinVar

Computational scores

Splicing

Publications

Other links and lift over