Genetic Variant AIPL1:p.Arg324Pro (chr17-6425644-C-G) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_014336.5(AIPL1):c.971G>C(p.Arg324Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,459,908 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R324L) has been classified as Benign.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

AIPL1
NM_014336.5 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 1.90

Publications

0 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: Uncertain_significance. The variant received 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
AIPL1	NM_014336.5 link	c.971G>C	p.Arg324Pro	missense_variant	Exon 6 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.971G>C	p.Arg324Pro	missense_variant	Exon 6 of 6	1	NM_014336.5	ENSP00000370521.3		Q9NZN9-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.85e-7

AC:

AN:

1459908

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

726368

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33474

American (AMR)

AF:

0.00

AC:

AN:

44716

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26120

East Asian (EAS)

AF:

0.00

AC:

AN:

39696

South Asian (SAS)

AF:

0.00

AC:

AN:

86246

European-Finnish (FIN)

AF:

0.00

AC:

AN:

51652

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5740

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1111906

Other (OTH)

AF:

0.00

AC:

AN:

60358

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.575

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome 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

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.78

BayesDel_addAF

Pathogenic

0.16

BayesDel_noAF

Uncertain

-0.020

CADD

Benign

(source)

DANN

Benign

0.97

DEOGEN2

Benign

0.32

T;.;T;.;.;.

Eigen

Benign

-0.46

Eigen_PC

Benign

-0.37

FATHMM_MKL

Uncertain

0.91

LIST_S2

Benign

0.76

T;T;T;T;T;T

M_CAP

Pathogenic

0.64

MetaRNN

Uncertain

0.49

T;T;T;T;T;T

MetaSVM

Uncertain

-0.25

MutationAssessor

Benign

0.55

N;.;.;.;.;.

PhyloP100

1.9

PrimateAI

Benign

0.37

PROVEAN

Uncertain

-3.0

D;D;.;.;.;.

REVEL

Uncertain

0.50

Sift

Uncertain

0.018

D;D;.;.;.;.

Sift4G

Benign

0.096

T;T;T;T;T;D

Polyphen

0.013

B;B;.;.;.;B

Vest4

0.29

MutPred

0.40

Loss of MoRF binding (P = 0.0029);.;.;.;.;.;

MVP

0.90

MPC

0.28

ClinPred

0.70

GERP RS

2.7

Varity_R

0.60

gMVP

0.79

Mutation Taster

=35/65

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over