rs760277934

Positions:

• chr12-7088853-C-G
• chr12-7088853-C-T

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM1 PM2 PP5_Moderate

The NM_001733.7(C1R):​c.902G>C​(p.Arg301Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 10/14 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★).

• Frequency: Genomes: not found (cov: 31)
• Consequence: C1R NM_001733.7 missense
• Clinical Significance: Pathogenic criteria provided, single submitter P:3
• Conservation: PhyloP100: -0.265

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]

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PM1: In a domain CUB 2 (size 112) in uniprot entity C1R_HUMAN there are 7 pathogenic changes around while only 3 benign (70%) in NM_001733.7
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 12-7088853-C-G is Pathogenic according to our data. Variant chr12-7088853-C-G is described in ClinVar as [Pathogenic]. Clinvar id is 267352.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
C1R	NM_001733.7	c.902G>C	p.Arg301Pro	missense_variant	6/11	ENST00000647956.2	NP_001724.4
C1R	NM_001354346.2	c.944G>C	p.Arg315Pro	missense_variant	6/11		NP_001341275.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
C1R	ENST00000647956.2	c.902G>C	p.Arg301Pro	missense_variant	6/11		NM_001733.7	ENSP00000497341	P1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 0

GnomAD4 genome Cov.: 31

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:3

Revision: criteria provided, single submitter

Submissions by phenotype

Ehlers-Danlos syndrome, periodontal type 1 Pathogenic:2

Pathogenic, no assertion criteria provided	literature only	OMIM	Oct 31, 2016	- -
Pathogenic, criteria provided, single submitter	research	Institute of Human Genetics, Medical University Innsbruck	Aug 23, 2016	- -

Ehlers-Danlos syndrome, periodontal type 2 Pathogenic:1

Likely pathogenic, no assertion criteria provided

research

University of Washington Center for Mendelian Genomics, University of Washington

Oct 13, 2016

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.61
BayesDel_addAF	Benign	-0.13	T
BayesDel_noAF	Benign	-0.43
CADD	Benign	12
DANN	Benign	0.92
DEOGEN2	Benign	0.014	.;.;T;T
Eigen	Benign	-1.1
Eigen_PC	Benign	-1.3
FATHMM_MKL	Benign	0.34	N
LIST_S2	Benign	0.52	T;.;T;T
MetaRNN	Uncertain	0.48	T;T;T;T
MetaSVM	Benign	-0.97	T
MutationTaster	Benign	1.0	N;N;N;N
PrimateAI	Benign	0.24	T
PROVEAN	Benign	-2.0	.;.;N;N
REVEL	Benign	0.20
Sift	Benign	0.051	.;.;T;D
Sift4G	Benign	0.076	.;.;T;.
Polyphen		0.99, 0.94	.;.;D;P
Vest4		0.21, 0.19, 0.22
MutPred		0.71		Gain of ubiquitination at K299 (P = 0.0526);Gain of ubiquitination at K299 (P = 0.0526);.;.;
MVP		0.17
ClinPred		0.49	T
GERP RS		-10
gMVP		0.82

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs760277934; hg19: chr12-7241449;