Variant chr1-207090319-C-G details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_001017365.3(C4BPB):c.70C>G(p.Pro24Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000274 in 1,460,070 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000027 ( 1 hom. )

Consequence

C4BPB
NM_001017365.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.199

Variant links:

Genes affected

C4BPB (HGNC:1328): (complement component 4 binding protein beta) This gene encodes a member of a superfamily of proteins composed predominantly of tandemly arrayed short consensus repeats of approximately 60 amino acids. A single, unique beta-chain encoded by this gene assembles with seven identical alpha-chains into the predominant isoform of C4b-binding protein, a multimeric protein that controls activation of the complement cascade through the classical pathway. C4b-binding protein has a regulatory role in the coagulation system also, mediated through the beta-chain binding of protein S, a vitamin K-dependent protein that serves as a cofactor of activated protein C. The genes encoding both alpha and beta chains are located adjacent to each other on human chromosome 1 in the regulator of complement activation gene cluster. Alternative splicing gives rise to multiple transcript variants. [provided by RefSeq, Jul 2008]

C4BPB links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.1637319).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
C4BPB	NM_001017365.3 linkuse as main transcript	c.70C>G	p.Pro24Ala	missense_variant	3/7	ENST00000367078.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
C4BPB	ENST00000367078.8 linkuse as main transcript	c.70C>G	p.Pro24Ala	missense_variant	3/7	1	NM_001017365.3	P4	P20851-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000400

AC:

AN:

249694

Hom.:

AF XY:

0.00

AC XY:

AN XY:

134980

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 SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000886

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000274

AC:

AN:

1460070

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

726392

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000360

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Alfa

AF:

0.000111

Hom.:

EpiCase

AF:

0.000109

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 06, 2024

The c.70C>G (p.P24A) alteration is located in exon 2 (coding exon 2) of the C4BPB gene. This alteration results from a C to G substitution at nucleotide position 70, causing the proline (P) at amino acid position 24 to be replaced by an alanine (A). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Benign

-0.14

BayesDel_noAF

Benign

-0.44

CADD

Benign

8.1

DANN

Benign

0.78

DEOGEN2

Benign

0.12

T;T;T;.;T

Eigen

Benign

-0.83

Eigen_PC

Benign

-1.0

FATHMM_MKL

Benign

0.10

LIST_S2

Benign

0.55

.;T;.;T;T

M_CAP

Uncertain

0.14

MetaRNN

Benign

0.16

T;T;T;T;T

MetaSVM

Benign

-0.63

MutationAssessor

Uncertain

2.4

M;.;M;.;M

MutationTaster

Benign

1.0

N;N;N;N;N

PrimateAI

Benign

0.24

PROVEAN

Benign

-1.1

N;N;N;N;N

REVEL

Benign

0.15

Sift

Uncertain

0.017

D;D;D;D;D

Sift4G

Benign

0.10

T;T;T;T;T

Polyphen

0.35

B;.;B;B;B

Vest4

0.24

MutPred

0.55

Loss of disorder (P = 0.063);Loss of disorder (P = 0.063);Loss of disorder (P = 0.063);.;Loss of disorder (P = 0.063);

MVP

0.081

MPC

0.45

ClinPred

0.095

GERP RS

-3.0

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.049

gMVP

0.53

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over