11-119339330-A-G

Variant names:

• chr11-119339330-A-G
• rs142208418
• NM_031433.4:c.*1629T>C

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BP4_Strong

The NM_031433.4(MFRP):​c.*1629T>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 0.000303 in 1,612,386 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.00028 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00031 (1 hom.)
• Consequence: MFRP NM_031433.4 3_prime_UTR
• Clinical Significance: Uncertain significance criteria provided, single submitter U:2
• Conservation: PhyloP100: 0.0820
• Publications: 0 publications found

Genes affected

MFRP (HGNC:18121): (membrane frizzled-related protein) This gene encodes a member of the frizzled-related protein family. The encoded protein plays an important role in eye development and mutations in this gene have been associated with nanophthalmos, posterior microphthalmia, retinitis pigmentosa, foveoschisis, and optic disc drusen. The protein is encoded by a bicistronic transcript which also encodes C1q and tumor necrosis factor related protein 5 (C1QTNF5). [provided by RefSeq, Jun 2013]

C1QTNF5 (HGNC:14344): (C1q and TNF related 5) This gene encodes a member of a family of proteins that function as components of basement membranes and may play a role in cell adhesion. Mutations in this gene have been associated with late-onset retinal degeneration. The protein may be encoded by either a bicistronic transcript including sequence from the upstream membrane frizzled-related protein gene (MFRP), or by a monocistronic transcript expressed from an internal promoter. [provided by RefSeq, Jun 2013]

C1QTNF5 Gene-Disease associations (from GenCC):

• late-onset retinal degeneration

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), G2P

ACMG classification

Our verdict: Likely_benign. The variant received -4 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.79).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MFRP	NM_031433.4	c.*1629T>C		3_prime_UTR_variant	Exon 15 of 15	ENST00000619721.6	NP_113621.1
C1QTNF5	NM_001278431.2	c.*1T>C		3_prime_UTR_variant	Exon 3 of 3	ENST00000528368.3	NP_001265360.1
C1QTNF5	NM_015645.5	c.*1T>C		3_prime_UTR_variant	Exon 15 of 15		NP_056460.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MFRP	ENST00000619721.6	c.*1629T>C		3_prime_UTR_variant	Exon 15 of 15	1	NM_031433.4	ENSP00000481824.1
C1QTNF5	ENST00000528368.3	c.*1T>C		3_prime_UTR_variant	Exon 3 of 3	1	NM_001278431.2	ENSP00000431140.1
C1QTNF5	ENST00000530681.2	c.*1T>C		3_prime_UTR_variant	Exon 2 of 2	1		ENSP00000456533.2
C1QTNF5	ENST00000525657.2	n.*40T>C		downstream_gene_variant		2

Frequencies

GnomAD3 genomes AF: 0.000276 AC: 42 AN: 152202 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000523

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000470

Gnomad OTH AF: 0.000480

GnomAD2 exomes AF: 0.000202 AC: 50 AN: 247270 AF XY: 0.000246

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000871

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.000139

Gnomad NFE exome AF: 0.000390

Gnomad OTH exome AF: 0.000165

GnomAD4 exome AF: 0.000306 AC: 447 AN: 1460066 Hom.: 1 Cov.: 31 AF XY: 0.000288 AC XY: 209 AN XY: 726248

African (AFR) AF: 0.0000896 AC: 3 AN: 33470

American (AMR) AF: 0.000112 AC: 5 AN: 44624

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25986

East Asian (EAS) AF: 0.00 AC: 0 AN: 39672

South Asian (SAS) AF: 0.00 AC: 0 AN: 86072

European-Finnish (FIN) AF: 0.0000564 AC: 3 AN: 53238

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5758

European-Non Finnish (NFE) AF: 0.000382 AC: 424 AN: 1110936

Other (OTH) AF: 0.000199 AC: 12 AN: 60310

GnomAD4 genome AF: 0.000276 AC: 42 AN: 152320 Hom.: 0 Cov.: 32 AF XY: 0.000295 AC XY: 22 AN XY: 74482

African (AFR) AF: 0.0000240 AC: 1 AN: 41586

American (AMR) AF: 0.000523 AC: 8 AN: 15310

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5172

South Asian (SAS) AF: 0.00 AC: 0 AN: 4822

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10624

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.000470 AC: 32 AN: 68024

Other (OTH) AF: 0.000475 AC: 1 AN: 2106

Alfa AF: 0.000252 Hom.: 0

Bravo AF: 0.000283

EpiCase AF: 0.000327

EpiControl AF: 0.000534

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, single submitter

Submissions by phenotype

Isolated microphthalmia 5 Uncertain:1

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance: Uncertain significance

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, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Late-onset retinal degeneration Uncertain:1

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance: Uncertain significance

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, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.79
CADD	Benign	5.3
DANN	Benign	0.67
PhyloP100		0.082
Mutation Taster		=100/0	polymorphism

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: rs142208418; hg19: chr11-119210040;