NM_001733.7:c.550G>T

Variant names:

• chr12-7089608-C-A
• rs1126605
• NM_001733.7:c.550G>T

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_001733.7(C1R):​c.550G>T​(p.Glu184*) variant causes a stop gained 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: C1R NM_001733.7 stop_gained
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.459
• Publications: 21 publications found

Genes affected

C1R (HGNC:1246): (complement C1r) This gene encodes a member of the peptidase S1 protein family. The encoded protein is a proteolytic subunit in the complement system C1 complex. The complement system acts as a mediator in the innate immune response by ultimately triggering phagocytosis, inflammation, and rupturing the bacterial cell wall. Mutations in this gene are associated with Ehlers-Danlos Syndrome. [provided by RefSeq, Dec 2018]

C1RL (HGNC:21265): (complement C1r subcomponent like) Predicted to enable serine-type endopeptidase activity. Predicted to be involved in zymogen activation. Located in extracellular exosome. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
C1R	NM_001733.7	c.550G>T	p.Glu184*	stop_gained	Exon 4 of 11	ENST00000647956.2	NP_001724.4
C1R	NM_001354346.2	c.592G>T	p.Glu198*	stop_gained	Exon 4 of 11		NP_001341275.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
C1R	ENST00000647956.2	c.550G>T	p.Glu184*	stop_gained	Exon 4 of 11		NM_001733.7	ENSP00000497341.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 0

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Benign	-0.20	T
BayesDel_noAF	Benign	-0.53
CADD	Uncertain	25
DANN	Benign	0.92
Eigen	Benign	-1.1
Eigen_PC	Benign	-1.5
FATHMM_MKL	Benign	0.094	N
PhyloP100		-0.46
Vest4		0.86, 0.79, 0.83
GERP RS		-5.2
Mutation Taster		=100/0	polymorphism

Splicing

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

Other links and lift over

dbSNP: rs1126605; hg19: chr12-7242204;