chr1-56929463-G-A
Position:
Variant summary
Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2PP3
The NM_000066.4(C8B):c.1717C>T(p.Pro573Ser) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. P573P) has been classified as Likely benign.
Frequency
Genomes: not found (cov: 33)
Consequence
C8B
NM_000066.4 missense
NM_000066.4 missense
Scores
4
6
6
Clinical Significance
Conservation
PhyloP100: 5.87
Genes affected
C8B (HGNC:1353): (complement C8 beta chain) This gene encodes one of the three subunits of the complement component 8 (C8) protein. C8 is composed of equimolar amounts of alpha, beta and gamma subunits, which are encoded by three separate genes. C8 is one component of the membrane attack complex, which mediates cell lysis, and it initiates membrane penetration of the complex. This protein mediates the interaction of C8 with the C5b-7 membrane attack complex precursor. In humans deficiency of this protein is associated with increased risk of meningococcal infections. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jun 2013]
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ACMG classification
Classification made for transcript
Verdict is Uncertain_significance. Variant got 3 ACMG points.
PM2
Very rare variant in population databases, with high coverage;
PP3
MetaRNN computational evidence supports a deleterious effect, 0.822
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
C8B | NM_000066.4 | c.1717C>T | p.Pro573Ser | missense_variant | 12/12 | ENST00000371237.9 | |
C8B | NM_001278543.2 | c.1561C>T | p.Pro521Ser | missense_variant | 13/13 | ||
C8B | NM_001278544.2 | c.1531C>T | p.Pro511Ser | missense_variant | 13/13 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
C8B | ENST00000371237.9 | c.1717C>T | p.Pro573Ser | missense_variant | 12/12 | 1 | NM_000066.4 | P1 |
Frequencies
GnomAD3 genomes Cov.: 33
GnomAD3 genomes
Cov.:
33
GnomAD4 exome Cov.: 34
GnomAD4 exome
Cov.:
34
GnomAD4 genome Cov.: 33
GnomAD4 genome
Cov.:
33
Bravo
AF:
ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
not provided Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Jun 30, 2022 | Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). This variant has not been reported in the literature in individuals affected with C8B-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces proline, which is neutral and non-polar, with serine, which is neutral and polar, at codon 573 of the C8B protein (p.Pro573Ser). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
BayesDel_addAF
Uncertain
T
BayesDel_noAF
Benign
CADD
Uncertain
DANN
Uncertain
Eigen
Pathogenic
Eigen_PC
Uncertain
FATHMM_MKL
Pathogenic
D
M_CAP
Benign
T
MetaRNN
Pathogenic
D;D;D
MetaSVM
Benign
T
MutationTaster
Benign
D;D;D
PrimateAI
Benign
T
PROVEAN
Pathogenic
D;D;D
REVEL
Uncertain
Sift
Uncertain
D;D;D
Sift4G
Uncertain
D;D;D
Polyphen
1.0
.;D;D
Vest4
MutPred
Loss of catalytic residue at P573 (P = 0.0264);.;.;
MVP
MPC
ClinPred
D
GERP RS
gMVP
Splicing
Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at