chr1-207794912-T-C

Variant names:

• chr1-207794912-T-C
• rs14374
• NM_172351.3:c.*1435T>C

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BS1 BS2

The NM_172351.3(CD46):​c.*1435T>C variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0316 in 152,354 control chromosomes in the GnomAD database, including 102 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.032 (102 hom., cov: 32)
  • Failed GnomAD Quality Control
• Consequence: CD46 NM_172351.3 3_prime_UTR
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: -2.35

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]

MIR29B2CHG (HGNC:32018): (MIR29B2 and MIR29C host gene)

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.89).
• BP6: Variant 1-207794912-T-C is Benign according to our data. Variant chr1-207794912-T-C is described in ClinVar as [Benign]. Clinvar id is 294989.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BS1: Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.0316 (4821/152354) while in subpopulation NFE AF= 0.0487 (3313/68034). AF 95% confidence interval is 0.0473. There are 102 homozygotes in gnomad4. There are 2271 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
• BS2: High Homozygotes in GnomAd4 at 102 SD gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CD46	NM_172351.3	c.*1435T>C		3_prime_UTR_variant	Exon 13 of 13	ENST00000367042.6	NP_758861.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CD46	ENST00000367042.6	c.*1435T>C		3_prime_UTR_variant	Exon 13 of 13	1	NM_172351.3	ENSP00000356009.1

Frequencies

GnomAD3 genomes AF: 0.0317 AC: 4821 AN: 152236 Hom.: 101 Cov.: 32

Gnomad AFR AF: 0.00793

Gnomad AMI AF: 0.0175

Gnomad AMR AF: 0.0284

Gnomad ASJ AF: 0.0222

Gnomad EAS AF: 0.000576

Gnomad SAS AF: 0.0402

Gnomad FIN AF: 0.0362

Gnomad MID AF: 0.0285

Gnomad NFE AF: 0.0487

Gnomad OTH AF: 0.0296

GnomAD4 exome Data not reliable, filtered out with message: AC0 AC: 0 AN: 0 Hom.: 0 Cov.: 0 AC XY: 0 AN XY: 0

GnomAD4 genome AF: 0.0316 AC: 4821 AN: 152354 Hom.: 102 Cov.: 32 AF XY: 0.0305 AC XY: 2271 AN XY: 74500

Gnomad4 AFR AF: 0.00791

Gnomad4 AMR AF: 0.0284

Gnomad4 ASJ AF: 0.0222

Gnomad4 EAS AF: 0.000578

Gnomad4 SAS AF: 0.0405

Gnomad4 FIN AF: 0.0362

Gnomad4 NFE AF: 0.0487

Gnomad4 OTH AF: 0.0288

Alfa AF: 0.0411 Hom.: 128

Bravo AF: 0.0288

Asia WGS AF: 0.0160 AC: 57 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Atypical hemolytic-uremic syndrome with MCP/CD46 anomaly Benign:1

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

not provided Benign:1

-

Breakthrough Genomics, Breakthrough Genomics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: not provided

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.89
CADD	Benign	0.14
DANN	Benign	0.37
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1

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

Publications

LitVar

Other links and lift over

dbSNP: rs14374; hg19: chr1-207968257;