19-6693033-G-T

Variant names:

• chr19-6693033-G-T
• rs121909584
• NM_000064.4:c.3281C>A

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM2 PM5 PP5_Moderate

The NM_000064.4(C3):​c.3281C>A​(p.Ala1094Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Likely pathogenic (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A1094S) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: C3 NM_000064.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.775
• Publications: 0 publications found

Genes affected

C3 (HGNC:1318): (complement C3) Complement component C3 plays a central role in the activation of complement system. Its activation is required for both classical and alternative complement activation pathways. The encoded preproprotein is proteolytically processed to generate alpha and beta subunits that form the mature protein, which is then further processed to generate numerous peptide products. The C3a peptide, also known as the C3a anaphylatoxin, modulates inflammation and possesses antimicrobial activity. Mutations in this gene are associated with atypical hemolytic uremic syndrome and age-related macular degeneration in human patients. [provided by RefSeq, Nov 2015]

C3 Gene-Disease associations (from GenCC):

• atypical hemolytic-uremic syndrome with C3 anomaly

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), ClinGen
• complement component 3 deficiency

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, Laboratory for Molecular Medicine
• C3 glomerulonephritis

  Inheritance: AD Classification: MODERATE Submitted by: ClinGen

ACMG classification

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr19-6693033-G-A is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 17061.Status of the report is criteria_provided_single_submitter, 1 stars.
• PP5: Variant 19-6693033-G-T is Pathogenic according to our data. Variant chr19-6693033-G-T is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 4280193.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
C3	NM_000064.4	c.3281C>A	p.Ala1094Asp	missense_variant	Exon 26 of 41	ENST00000245907.11	NP_000055.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
C3	ENST00000245907.11	c.3281C>A	p.Ala1094Asp	missense_variant	Exon 26 of 41	1	NM_000064.4	ENSP00000245907.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.21
BayesDel_addAF	Benign	-0.027	T
BayesDel_noAF	Benign	-0.28
CADD	Benign	18
DANN	Uncertain	0.98
DEOGEN2	Benign	0.15	T
Eigen	Benign	-0.66
Eigen_PC	Benign	-0.51
FATHMM_MKL	Benign	0.25	N
LIST_S2	Benign	0.64	T
M_CAP	Benign	0.015	T
MetaRNN	Uncertain	0.54	D
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.9	L
PhyloP100		0.78
PrimateAI	Benign	0.48	T
PROVEAN	Benign	-2.3	N
REVEL	Pathogenic	0.72
Sift	Benign	0.24	T
Sift4G	Benign	0.47	T
Polyphen		0.0050	B
Vest4		0.75
MutPred		0.65		Gain of solvent accessibility (P = 0.2902);
MVP		0.84
MPC		0.89
ClinPred		0.17	T
GERP RS		3.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.8
Varity_R		0.61
gMVP		0.70
Mutation Taster		=17/83	disease causing

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

Other links and lift over

dbSNP: rs121909584; hg19: chr19-6693044;