Genetic Variant C1QB:c.-23-123_-23-112delGATGGATGGATG (chr1-22659292-AGATGGATGGATG-A) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 0P and 0B.

The NM_001378156.1(C1QB):c.-23-123_-23-112delGATGGATGGATG variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000111 in 648,232 control chromosomes in the GnomAD database, with no homozygous occurrence. It is difficult to determine the true allele frequency of this variant because it is of type DEL_BIG, and the frequency of such variant types in population databases may be underestimated and unreliable. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.00012 ( 0 hom., cov: 0)

Exomes 𝑓: 0.00011 ( 0 hom. )

Consequence

C1QB
NM_001378156.1 intron

Scores

Not classified

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 2.22

Publications

0 publications found

Variant links:

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]

C1QB Gene-Disease associations (from GenCC):

C1Q deficiency
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: ClinGen, Labcorp Genetics (formerly Invitae)

C1QB links:

ENSG00000308848 (HGNC:):

ENSG00000308848 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

Transcripts

RefSeq

Gene	Transcript	HGVSc	Effect	Exon rank	MANE	Protein	UniProt
C1QB	NM_001378156.1 link	c.-23-123_-23-112delGATGGATGGATG	intron_variant	Intron 1 of 2	ENST00000509305.6	NP_001365085.1
C1QB	NM_000491.5 link	c.-17-123_-17-112delGATGGATGGATG	intron_variant	Intron 1 of 2		NP_000482.3	P02746A0A024RAB9
C1QB	NM_001371184.3 link	c.-23-123_-23-112delGATGGATGGATG	intron_variant	Intron 2 of 3		NP_001358113.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
C1QB	ENST00000509305.6 link	c.-23-147_-23-136delGATGGATGGATG		intron_variant	Intron 1 of 2	1	NM_001378156.1	ENSP00000423689.1		D6R934

Frequencies

GnomAD3 genomes

AF:

0.000124

AC:

AN:

128764

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000459

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:

0.000145

Gnomad OTH

AF:

0.000566

GnomAD4 exome

AF:

0.000108

AC:

AN:

519336

Hom.:

AF XY:

0.0000986

AC XY:

AN XY:

273720

show subpopulations

African (AFR)

AF:

0.0000704

AC:

AN:

14198

American (AMR)

AF:

0.000482

AC:

AN:

26996

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

16072

East Asian (EAS)

AF:

0.00

AC:

AN:

26014

South Asian (SAS)

AF:

0.0000601

AC:

AN:

49896

European-Finnish (FIN)

AF:

0.0000806

AC:

AN:

37198

Middle Eastern (MID)

AF:

0.00

AC:

AN:

2158

European-Non Finnish (NFE)

AF:

0.000110

AC:

AN:

318610

Other (OTH)

AF:

0.0000355

AC:

AN:

28194

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.527

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.000124

AC:

AN:

128896

Hom.:

Cov.:

AF XY:

0.000113

AC XY:

AN XY:

61738

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

32060

American (AMR)

AF:

0.000459

AC:

AN:

13080

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3302

East Asian (EAS)

AF:

0.00

AC:

AN:

3768

South Asian (SAS)

AF:

0.00

AC:

AN:

3596

European-Finnish (FIN)

AF:

0.00

AC:

AN:

7982

Middle Eastern (MID)

AF:

0.00

AC:

AN:

230

European-Non Finnish (NFE)

AF:

0.000145

AC:

AN:

62250

Other (OTH)

AF:

0.000558

AC:

AN:

1792

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.484

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

126

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

PhyloP100

2.2

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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1-22659292-AGATGGATGGATGGATGGATG-AGATGGATG

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over