chr1-22659475-T-G
Position:
Variant summary
Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BP4
The NM_001378156.1(C1QB):c.13T>G(p.Trp5Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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 Uncertain significance (★).
Frequency
Genomes: not found (cov: 32)
Consequence
C1QB
NM_001378156.1 missense
NM_001378156.1 missense
Scores
1
16
Clinical Significance
Conservation
PhyloP100: -0.972
Genes affected
C1QB (HGNC:1242): (complement C1q B chain) This gene encodes the B-chain polypeptide of serum complement subcomponent C1q, which associates with C1r and C1s to yield the first component of the serum complement system. C1q is composed of 18 polypeptide chains which include 6 A-chains, 6 B-chains, and 6 C-chains. Each chain contains an N-terminal collagen-like region and a C-terminal C1q globular domain. C1q deficiency is associated with lupus erythematosus and glomerulonephritis. [provided by RefSeq, Dec 2016]
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ACMG classification
Classification made for transcript
Verdict is Uncertain_significance. Variant got 1 ACMG points.
PM2
Very rare variant in population databases, with high coverage;
BP4
Computational evidence support a benign effect (MetaRNN=0.27608296).
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
C1QB | NM_001378156.1 | c.13T>G | p.Trp5Gly | missense_variant | 2/3 | ENST00000509305.6 | |
C1QB | NM_000491.5 | c.19T>G | p.Trp7Gly | missense_variant | 2/3 | ||
C1QB | NM_001371184.3 | c.13T>G | p.Trp5Gly | missense_variant | 3/4 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
C1QB | ENST00000509305.6 | c.13T>G | p.Trp5Gly | missense_variant | 2/3 | 1 | NM_001378156.1 | P2 |
Frequencies
GnomAD3 genomes Cov.: 32
GnomAD3 genomes
Cov.:
32
GnomAD4 exome Cov.: 32
GnomAD4 exome
Cov.:
32
GnomAD4 genome Cov.: 32
GnomAD4 genome
Cov.:
32
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 | Aug 19, 2022 | 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. Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The glycine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. This variant has not been reported in the literature in individuals affected with C1QB-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces tryptophan, which is neutral and slightly polar, with glycine, which is neutral and non-polar, at codon 7 of the C1QB protein (p.Trp7Gly). - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
BayesDel_addAF
Benign
T
BayesDel_noAF
Benign
CADD
Benign
DANN
Benign
Eigen
Benign
Eigen_PC
Benign
FATHMM_MKL
Benign
N
LIST_S2
Benign
T;T;T;T
M_CAP
Benign
D
MetaRNN
Benign
T;T;T;T
MetaSVM
Benign
T
MutationTaster
Benign
N;N
PrimateAI
Benign
T
PROVEAN
Benign
N;N;N;N
REVEL
Uncertain
Sift
Benign
T;T;T;T
Sift4G
Benign
T;T;T;T
Polyphen
0.0
.;.;.;B
Vest4
0.19, 0.17
MutPred
0.61
.;.;.;Gain of disorder (P = 0.0084);
MVP
MPC
0.83
ClinPred
T
GERP RS
Varity_R
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
Publications
No publications associated with this variant yet.