Variant summary

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

The NM_001563.4(IMPG1):c.1157C>A(p.Ala386Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000187 in 1,612,738 control chromosomes in the GnomAD database, with no homozygous occurrence. 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 (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A386V) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000085 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00020 ( 0 hom. )

Consequence

IMPG1
NM_001563.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter P:1U:1

Conservation

PhyloP100: -0.975

Publications

3 publications found

Variant links:

Genes affected

IMPG1 (HGNC:6055): (interphotoreceptor matrix proteoglycan 1) This gene encodes a protein that is a major component of the retinal interphotoreceptor matrix. The encoded protein is a proteoglycan that is thought to play a role in maintaining viability of photoreceptor cells and in adhesion of the neural retina to the retinal pigment epithelium. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Sep 2013]

IMPG1 Gene-Disease associations (from GenCC):

inherited retinal dystrophy
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
vitelliform macular dystrophy 4
Inheritance: AD, AR Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Laboratory for Molecular Medicine, ClinGen, G2P, Labcorp Genetics (formerly Invitae)
retinitis pigmentosa
Inheritance: AR, AD Classification: MODERATE Submitted by: Franklin by Genoox
adult-onset foveomacular vitelliform dystrophy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

IMPG1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

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

BP4

Computational evidence support a benign effect (MetaRNN=0.027096093).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001563.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	IMPG1	NM_001563.4	MANE Select	c.1157C>A	p.Ala386Asp	missense	Exon 11 of 17	NP_001554.2
	IMPG1	NM_001282368.2		c.923C>A	p.Ala308Asp	missense	Exon 10 of 16	NP_001269297.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	IMPG1	ENST00000369950.8	TSL:1 MANE Select	c.1157C>A	p.Ala386Asp	missense	Exon 11 of 17	ENSP00000358966.3
	IMPG1	ENST00000611179.4	TSL:5	c.923C>A	p.Ala308Asp	missense	Exon 10 of 16	ENSP00000481913.1

Frequencies

GnomAD3 genomes

AF:

0.0000854

AC:

AN:

152156

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000724

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.000147

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000720

AC:

AN:

249952

AF XY:

0.0000592

show subpopulations

Gnomad AFR exome

AF:

0.0000617

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000150

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000198

AC:

289

AN:

1460464

Hom.:

Cov.:

AF XY:

0.000198

AC XY:

144

AN XY:

726558

show subpopulations

African (AFR)

AF:

0.0000299

AC:

AN:

33402

American (AMR)

AF:

0.00

AC:

AN:

44424

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26108

East Asian (EAS)

AF:

0.00

AC:

AN:

39628

South Asian (SAS)

AF:

0.00

AC:

AN:

86042

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53370

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5760

European-Non Finnish (NFE)

AF:

0.000254

AC:

282

AN:

1111388

Other (OTH)

AF:

0.0000994

AC:

AN:

60342

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.434

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

100

<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:

0.0000854

AC:

AN:

152274

Hom.:

Cov.:

AF XY:

0.0000806

AC XY:

AN XY:

74456

show subpopulations

African (AFR)

AF:

0.0000722

AC:

AN:

41556

American (AMR)

AF:

0.00

AC:

AN:

15280

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5190

South Asian (SAS)

AF:

0.00

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10606

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000147

AC:

AN:

68026

Other (OTH)

AF:

0.00

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.490

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

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:

0.000140

Hom.:

Bravo

AF:

0.0000718

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.000778

AC:

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000349

AC:

ExAC

AF:

0.0000741

AC:

EpiCase

AF:

0.0000546

EpiControl

AF:

0.0000593

ClinVar

ClinVar submissions as Germline

Significance:Uncertain significance

Revision:criteria provided, single submitter

View on ClinVar

Pathogenic

VUS

Benign

Condition

Macular dystrophy (1)

not provided (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.071

BayesDel_addAF

Benign

-0.51

BayesDel_noAF

Benign

-0.73

CADD

Benign

0.066

(source)

DANN

Benign

0.15

DEOGEN2

Benign

0.00020

Eigen

Benign

-1.9

Eigen_PC

Benign

-1.9

FATHMM_MKL

Benign

0.0051

LIST_S2

Benign

0.48

M_CAP

Benign

0.0018

MetaRNN

Benign

0.027

MetaSVM

Benign

-0.97

MutationAssessor

Benign

-0.76

PhyloP100

-0.97

PrimateAI

Benign

0.22

PROVEAN

Benign

-0.060

REVEL

Benign

0.018

Sift

Benign

0.60

Sift4G

Benign

0.56

Polyphen

0.0

Vest4

0.049

MVP

0.095

MPC

0.013

ClinPred

0.036

GERP RS

-5.8

Varity_R

0.072

gMVP

0.15

Mutation Taster

=36/64

disease causing

(source)

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

6-76003929-G-T

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

ClinVar submissions as Germline

Computational scores

Splicing

Publications

Other links and lift over