NM_031433.4:c.191G>A

Variant names:

Variant summary

Our verdict is Benign. The variant received -13 ACMG points: 0P and 13B. BP4_StrongBP6BS1BS2

The NM_031433.4(MFRP):c.191G>A(p.Arg64His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000978 in 1,603,600 control chromosomes in the GnomAD database, including 15 homozygotes. 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 Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R64C) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0011 ( 2 hom., cov: 32)

Exomes 𝑓: 0.00097 ( 13 hom. )

Consequence

MFRP
NM_031433.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:2

Conservation

PhyloP100: -1.47

Publications

4 publications found

Variant links:

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]

MFRP links:

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):

inherited retinal dystrophy
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
late-onset retinal degeneration
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, G2P, Labcorp Genetics (formerly Invitae)

C1QTNF5 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -13 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.004893422).

BP6

Variant 11-119346126-C-T is Benign according to our data. Variant chr11-119346126-C-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 302978.

BS1

Variant frequency is greater than expected in population eas. GnomAdExome4 allele frequency = 0.00097 (1408/1451376) while in subpopulation EAS AF = 0.00535 (211/39406). AF 95% confidence interval is 0.00476. There are 13 homozygotes in GnomAdExome4. There are 709 alleles in the male GnomAdExome4 subpopulation. Median coverage is 36. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 2 AR,AD gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_031433.4. 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
	MFRP	NM_031433.4	MANE Select	c.191G>A	p.Arg64His	missense	Exon 3 of 15	NP_113621.1	Q9BY79-1
	C1QTNF5	NM_015645.5		c.-2446G>A		5_prime_UTR	Exon 3 of 15	NP_056460.1	Q9BXJ0

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
MFRP	ENST00000619721.6	TSL:1 MANE Select	c.191G>A	p.Arg64His	missense	Exon 3 of 15	ENSP00000481824.1	Q9BY79-1
MFRP	ENST00000360167.4	TSL:2	c.191G>A	p.Arg64His	missense	Exon 3 of 10	ENSP00000353291.4	Q9BY79-2
MFRP	ENST00000526059.1	TSL:3	n.349G>A		non_coding_transcript_exon	Exon 2 of 3

Frequencies

GnomAD3 genomes

AF:

0.00105

AC:

160

AN:

152106

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000169

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.0334

Gnomad EAS

AF:

0.00231

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000294

Gnomad OTH

AF:

0.00240

GnomAD2 exomes

AF:

0.00151

AC:

341

AN:

225536

AF XY:

0.00147

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000156

Gnomad ASJ exome

AF:

0.0288

Gnomad EAS exome

AF:

0.000408

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000413

Gnomad OTH exome

AF:

0.00194

GnomAD4 exome

AF:

0.000970

AC:

1408

AN:

1451376

Hom.:

Cov.:

AF XY:

0.000984

AC XY:

709

AN XY:

720874

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33310

American (AMR)

AF:

0.000117

AC:

AN:

42876

Ashkenazi Jewish (ASJ)

AF:

0.0323

AC:

837

AN:

25944

East Asian (EAS)

AF:

0.00535

AC:

211

AN:

39406

South Asian (SAS)

AF:

0.00

AC:

AN:

84850

European-Finnish (FIN)

AF:

0.0000192

AC:

AN:

52216

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5756

European-Non Finnish (NFE)

AF:

0.000174

AC:

193

AN:

1107002

Other (OTH)

AF:

0.00268

AC:

161

AN:

60016

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.486

Heterozygous variant carriers

197

296

394

493

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

120

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00105

AC:

160

AN:

152224

Hom.:

Cov.:

AF XY:

0.000967

AC XY:

AN XY:

74442

show subpopulations

African (AFR)

AF:

0.000169

AC:

AN:

41528

American (AMR)

AF:

0.00

AC:

AN:

15288

Ashkenazi Jewish (ASJ)

AF:

0.0334

AC:

116

AN:

3470

East Asian (EAS)

AF:

0.00232

AC:

AN:

5180

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10618

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000294

AC:

AN:

67998

Other (OTH)

AF:

0.00237

AC:

AN:

2108

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.498

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00141

Hom.:

Bravo

AF:

0.000971

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.00117

AC:

ExAC

AF:

0.00112

AC:

135

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

ClinVar submissions

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

Isolated microphthalmia 5 (1)

Isolated microphthalmia 6 (1)

MFRP-related disorder (1)

Retinal degeneration (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.091

BayesDel_addAF

Benign

-0.49

BayesDel_noAF

Benign

-0.60

CADD

Benign

5.8

(source)

DANN

Benign

0.94

DEOGEN2

Benign

0.019

Eigen

Benign

-1.3

Eigen_PC

Benign

-1.3

FATHMM_MKL

Benign

0.0046

LIST_S2

Benign

0.71

M_CAP

Benign

0.030

MetaRNN

Benign

0.0049

MetaSVM

Benign

-1.0

MutationAssessor

Benign

-0.065

PhyloP100

-1.5

PrimateAI

Benign

0.24

PROVEAN

Benign

-0.46

REVEL

Benign

0.036

Sift

Benign

0.59

Sift4G

Benign

0.51

Polyphen

0.0010

Vest4

0.13

MVP

0.17

ClinPred

0.0080

GERP RS

-2.9

Varity_R

0.037

gMVP

0.21

Mutation Taster

=99/1

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

Details are displayed if max score is > 0.2

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over