Genetic Variant C1QC:p.Tyr33Tyr (chr1-22644122-C-T) – ACMG Classification: Likely_benign (-3 pts)

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2BP4_ModerateBP6_ModerateBP7

The NM_172369.5(C1QC):c.99C>T(p.Tyr33Tyr) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000227 in 1,583,378 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

Frequency

Genomes: 𝑓 0.000033 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000022 ( 0 hom. )

Consequence

C1QC
NM_172369.5 synonymous

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: -0.215

Publications

0 publications found

Variant links:

Genes affected

C1QC (HGNC:1245): (complement C1q C chain) This gene encodes the C-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]

C1QC Gene-Disease associations (from GenCC):

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

C1QC links:

ENSG00000289692 (HGNC:):

ENSG00000289692 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.39).

BP6

Variant 1-22644122-C-T is Benign according to our data. Variant chr1-22644122-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 1608762.Status of the report is criteria_provided_single_submitter, 1 stars.

BP7

Synonymous conserved (PhyloP=-0.215 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_172369.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
C1QC	NM_172369.5	MANE Select	c.99C>T	p.Tyr33Tyr	synonymous	Exon 2 of 3	NP_758957.2	P02747
C1QC	NM_001114101.3		c.99C>T	p.Tyr33Tyr	synonymous	Exon 2 of 3	NP_001107573.1	P02747
C1QC	NM_001347619.2		c.99C>T	p.Tyr33Tyr	synonymous	Exon 2 of 3	NP_001334548.1	P02747

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
C1QC	ENST00000374640.9	TSL:1 MANE Select	c.99C>T	p.Tyr33Tyr	synonymous	Exon 2 of 3	ENSP00000363771.4	P02747
C1QC	ENST00000374637.1	TSL:3	c.99C>T	p.Tyr33Tyr	synonymous	Exon 2 of 3	ENSP00000363768.1	P02747
C1QC	ENST00000374639.7	TSL:2	c.99C>T	p.Tyr33Tyr	synonymous	Exon 2 of 3	ENSP00000363770.3	P02747

Frequencies

GnomAD3 genomes

AF:

0.0000329

AC:

AN:

152142

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000735

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000355

AC:

AN:

197120

AF XY:

0.0000569

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:

0.0000695

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000217

AC:

AN:

1431236

Hom.:

Cov.:

AF XY:

0.0000282

AC XY:

AN XY:

708674

show subpopulations

African (AFR)

AF:

0.0000301

AC:

AN:

33260

American (AMR)

AF:

0.00

AC:

AN:

38598

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25418

East Asian (EAS)

AF:

0.00

AC:

AN:

38746

South Asian (SAS)

AF:

0.0000491

AC:

AN:

81468

European-Finnish (FIN)

AF:

0.00

AC:

AN:

50894

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5712

European-Non Finnish (NFE)

AF:

0.0000228

AC:

AN:

1097752

Other (OTH)

AF:

0.0000168

AC:

AN:

59388

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.483

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000329

AC:

AN:

152142

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74316

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41448

American (AMR)

AF:

0.00

AC:

AN:

15282

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5176

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10612

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000735

AC:

AN:

68002

Other (OTH)

AF:

0.00

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0000580

Hom.:

Bravo

AF:

0.0000302

ClinVar

ClinVar submissions as Germline

Significance:Likely benign

Revision:criteria provided, single submitter

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.39

CADD

Benign

7.8

(source)

DANN

Benign

0.81

PhyloP100

-0.21

PromoterAI

-0.0066

Neutral

(source)

Mutation Taster

=100/0

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

Details are displayed if max score is > 0.2

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

Publications

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over