chr17-6433951-G-A

Variant names:

Variant summary

Our verdict is Benign. The variant received -7 ACMG points: 2P and 9B. PM1BP4_StrongBS1_SupportingBS2

The NM_014336.5(AIPL1):c.244C>T(p.His82Tyr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00166 in 1,614,082 control chromosomes in the GnomAD database, including 5 homozygotes. In-silico tool predicts a benign outcome for this variant. 13/22 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. H82Q) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0013 ( 0 hom., cov: 30)

Exomes 𝑓: 0.0017 ( 5 hom. )

Consequence

AIPL1
NM_014336.5 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:4B:2

Conservation

PhyloP100: 0.0720

Publications

9 publications found

Variant links:

Genes affected

AIPL1 (HGNC:359): (aryl hydrocarbon receptor interacting protein like 1) Leber congenital amaurosis (LCA) is the most severe inherited retinopathy with the earliest age of onset and accounts for at least 5% of all inherited retinal diseases. Affected individuals are diagnosed at birth or in the first few months of life with nystagmus, severely impaired vision or blindness and an abnormal or flat electroretinogram. The photoreceptor/pineal-expressed gene, AIPL1, encoding aryl-hydrocarbon interacting protein-like 1, is located within the LCA4 candidate region. The encoded protein contains three tetratricopeptide motifs, consistent with chaperone or nuclear transport activity. Mutations in this gene may cause approximately 20% of recessive LCA. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jan 2014]

AIPL1 Gene-Disease associations (from GenCC):

AIPL1-related retinopathy
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
Leber congenital amaurosis 4
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
Leber congenital amaurosis
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

AIPL1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -7 ACMG points.

PM1

In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 9 uncertain in NM_014336.5

BP4

Computational evidence support a benign effect (MetaRNN=0.019453347).

BS1

Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.00131 (199/152284) while in subpopulation NFE AF = 0.00197 (134/68034). AF 95% confidence interval is 0.0017. There are 0 homozygotes in GnomAd4. There are 110 alleles in the male GnomAd4 subpopulation. Median coverage is 30. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

BS2

High Homozygotes in GnomAdExome4 at 5 AR,AD gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
AIPL1	NM_014336.5 link	c.244C>T	p.His82Tyr	missense_variant	Exon 2 of 6	ENST00000381129.8	NP_055151.3	Q9NZN9-1F1T0B6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
AIPL1	ENST00000381129.8 link	c.244C>T	p.His82Tyr	missense_variant	Exon 2 of 6	1	NM_014336.5	ENSP00000370521.3		Q9NZN9-1

Frequencies

GnomAD3 genomes

AF:

0.00131

AC:

199

AN:

152166

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000965

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00537

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00197

Gnomad OTH

AF:

0.000956

GnomAD2 exomes

AF:

0.00164

AC:

411

AN:

251020

AF XY:

0.00160

show subpopulations

Gnomad AFR exome

AF:

0.0000616

Gnomad AMR exome

AF:

0.0000579

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00602

Gnomad NFE exome

AF:

0.00219

Gnomad OTH exome

AF:

0.00114

GnomAD4 exome

AF:

0.00170

AC:

2481

AN:

1461798

Hom.:

Cov.:

AF XY:

0.00167

AC XY:

1215

AN XY:

727186

show subpopulations

African (AFR)

AF:

0.000149

AC:

AN:

33480

American (AMR)

AF:

0.0000224

AC:

AN:

44710

Ashkenazi Jewish (ASJ)

AF:

0.000115

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39694

South Asian (SAS)

AF:

0.000789

AC:

AN:

86234

European-Finnish (FIN)

AF:

0.00597

AC:

319

AN:

53418

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5756

European-Non Finnish (NFE)

AF:

0.00181

AC:

2014

AN:

1111978

Other (OTH)

AF:

0.00118

AC:

AN:

60392

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.484

Heterozygous variant carriers

146

292

439

585

731

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

148

222

296

370

<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:

0.00131

AC:

199

AN:

152284

Hom.:

Cov.:

AF XY:

0.00148

AC XY:

110

AN XY:

74450

show subpopulations

African (AFR)

AF:

0.0000963

AC:

AN:

41556

American (AMR)

AF:

0.0000654

AC:

AN:

15296

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5156

South Asian (SAS)

AF:

0.000207

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00537

AC:

AN:

10620

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00197

AC:

134

AN:

68034

Other (OTH)

AF:

0.000946

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.499

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:

0.00148

Hom.:

Bravo

AF:

0.000831

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.00140

AC:

ExAC

AF:

0.00185

AC:

224

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.00115

EpiControl

AF:

0.00148

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:4Benign:2

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Leber congenital amaurosis 4

Uncertain:1Benign:1

Apr 27, 2017

Illumina Laboratory Services, Illumina

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). Publications were found based on this search. However, the evidence from the literature, in combination with allele frequency data from public databases where available, was not sufficient to rule this variant in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. -

Dec 31, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Uncertain:1

Aug 30, 2013

Eurofins Ntd Llc (ga)

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Retinal dystrophy

Uncertain:1

Jan 01, 2022

Institute of Human Genetics, Univ. Regensburg, Univ. Regensburg

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Retinitis pigmentosa

Uncertain:1

Apr 27, 2017

Illumina Laboratory Services, Illumina

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases did not allow this variant to be ruled in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. -

AIPL1-related disorder

Benign:1

Aug 16, 2024

PreventionGenetics, part of Exact Sciences

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.086

BayesDel_addAF

Benign

-0.18

BayesDel_noAF

Uncertain

-0.030

CADD

Benign

5.8

(source)

DANN

Benign

0.96

DEOGEN2

Benign

0.14

T;.;T;.;.;.;T;T

Eigen

Benign

-1.1

Eigen_PC

Benign

-1.2

FATHMM_MKL

Benign

0.067

LIST_S2

Uncertain

0.94

D;D;D;D;D;D;D;D

M_CAP

Uncertain

0.095

MetaRNN

Benign

0.019

T;T;T;T;T;T;T;T

MetaSVM

Benign

-0.58

MutationAssessor

Benign

1.0

L;L;.;.;.;L;.;.

PhyloP100

0.072

PrimateAI

Benign

0.23

PROVEAN

Benign

-1.9

N;N;.;.;.;.;.;.

REVEL

Uncertain

0.58

Sift

Uncertain

0.0090

D;T;.;.;.;.;.;.

Sift4G

Uncertain

0.0030

D;D;D;D;D;D;D;.

Polyphen

0.67

P;P;.;B;.;.;.;.

Vest4

0.72

MVP

0.79

MPC

0.42

ClinPred

0.015

GERP RS

-3.9

Varity_R

0.36

gMVP

0.68

Mutation Taster

=90/10

polymorphism

(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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over