NM_172351.3:c.402T>G

Variant names:

• chr1-207759651-T-G
• rs1553250568
• NM_172351.3:c.402T>G

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_172351.3(CD46):​c.402T>G​(p.Ile134Met) variant causes a missense 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. 16/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: CD46 NM_172351.3 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: -0.380
• Publications: 0 publications found

Genes affected

CD46 (HGNC:6953): (CD46 molecule) The protein encoded by this gene is a type I membrane protein and is a regulatory part of the complement system. The encoded protein has cofactor activity for inactivation of complement components C3b and C4b by serum factor I, which protects the host cell from damage by complement. In addition, the encoded protein can act as a receptor for the Edmonston strain of measles virus, human herpesvirus-6, and type IV pili of pathogenic Neisseria. Finally, the protein encoded by this gene may be involved in the fusion of the spermatozoa with the oocyte during fertilization. Mutations at this locus have been associated with susceptibility to hemolytic uremic syndrome. Alternatively spliced transcript variants encoding different isoforms have been described. [provided by RefSeq, Jun 2010]

CD46 Gene-Disease associations (from GenCC):

• atypical hemolytic-uremic syndrome with MCP/CD46 anomaly

  Inheritance: AD, SD, AR Classification: DEFINITIVE, STRONG Submitted by: Laboratory for Molecular Medicine, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• atypical hemolytic-uremic syndrome

  Inheritance: SD Classification: DEFINITIVE Submitted by: ClinGen

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.37066627).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_172351.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CD46	NM_172351.3	MANE Select	c.402T>G	p.Ile134Met	missense	Exon 4 of 13	NP_758861.1	P15529-11
	CD46	NM_172359.3		c.402T>G	p.Ile134Met	missense	Exon 4 of 13	NP_758869.1	P15529-2
	CD46	NM_002389.4		c.402T>G	p.Ile134Met	missense	Exon 4 of 14	NP_002380.3	P15529-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CD46	ENST00000367042.6	TSL:1 MANE Select	c.402T>G	p.Ile134Met	missense	Exon 4 of 13	ENSP00000356009.1	P15529-11
	CD46	ENST00000322875.8	TSL:1	c.402T>G	p.Ile134Met	missense	Exon 4 of 13	ENSP00000313875.4	P15529-2
	CD46	ENST00000358170.6	TSL:1	c.402T>G	p.Ile134Met	missense	Exon 4 of 14	ENSP00000350893.2	P15529-1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 25

GnomAD4 genome Cov.: 33

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	1	-	Atypical hemolytic-uremic syndrome (1)
-	1	-	Familial hemolytic anemia (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.13
BayesDel_addAF	Benign	-0.18	T
BayesDel_noAF	Benign	-0.50
CADD	Benign	15
DANN	Uncertain	0.98
DEOGEN2	Benign	0.30	T
Eigen	Benign	-0.43
Eigen_PC	Benign	-0.73
FATHMM_MKL	Benign	0.030	N
LIST_S2	Benign	0.85	T
M_CAP	Benign	0.038	D
MetaRNN	Benign	0.37	T
MetaSVM	Benign	-0.67	T
MutationAssessor	Benign	1.7	L
PhyloP100		-0.38
PrimateAI	Benign	0.31	T
PROVEAN	Benign	-1.8	N
REVEL	Benign	0.19
Sift	Uncertain	0.0090	D
Sift4G	Uncertain	0.031	D
Polyphen		0.99	D
Vest4		0.19
MutPred		0.55		Loss of catalytic residue at I134 (P = 0.0432)
MVP		0.49
MPC		0.59
ClinPred		0.66	D
GERP RS		-4.3
Varity_R		0.22
gMVP		0.48
Mutation Taster		=76/24	polymorphism

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

Other links and lift over

dbSNP: rs1553250568; hg19: chr1-207932996;