Genetic Variant CLRN1:p.Cys40Arg (chr3-150972591-A-G) – ACMG Classification: Pathogenic (10 pts)

Variant summary

Our verdict is Pathogenic. The variant received 10 ACMG points: 10P and 0B. PM1PM2PM5PP3_ModeratePP5_Moderate

The NM_174878.3(CLRN1):c.118T>C(p.Cys40Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. C40G) has been classified as Pathogenic.

Frequency

Genomes: not found (cov: 33)

Consequence

CLRN1
NM_174878.3 missense

Scores

Clinical Significance

Likely pathogenic criteria provided, single submitter P:1

Conservation

PhyloP100: 8.71

Publications

15 publications found

Variant links:

Genes affected

CLRN1 (HGNC:12605): (clarin 1) This gene encodes a protein that contains a cytosolic N-terminus, multiple helical transmembrane domains, and an endoplasmic reticulum membrane retention signal, TKGH, in the C-terminus. The encoded protein may be important in development and homeostasis of the inner ear and retina. Mutations within this gene have been associated with Usher syndrome type IIIa. Multiple transcript variants encoding distinct isoforms have been identified for this gene. [provided by RefSeq, Jul 2008]

CLRN1 links:

ENSG00000243273 (HGNC:):

ENSG00000243273 links:

SIAH2-AS1 (HGNC:40526): (SIAH2 antisense RNA 1)

SIAH2-AS1 links:

CLRN1-AS1 (HGNC:30895): (CLRN1 antisense RNA 1)

CLRN1-AS1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 10 ACMG points.

PM1

In a hotspot region, there are 5 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 2 uncertain in NM_174878.3

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr3-150972591-A-C is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 4399.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.872

PP5

Variant 3-150972591-A-G is Pathogenic according to our data. Variant chr3-150972591-A-G is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 3601045.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CLRN1	NM_174878.3 link	c.118T>C	p.Cys40Arg	missense_variant	Exon 1 of 3	ENST00000327047.6	NP_777367.1	P58418-3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CLRN1	ENST00000327047.6 link	c.118T>C	p.Cys40Arg	missense_variant	Exon 1 of 3	1	NM_174878.3	ENSP00000322280.1		P58418-3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000398

AC:

AN:

251462

AF XY:

0.00000736

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000544

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

Cov.:

GnomAD4 genome

Cov.:

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Usher syndrome type 3A

Pathogenic:1

Jan 09, 2025

Institute of Rare Diseases, West China Hospital, Sichuan University

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:research

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Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.98

BayesDel_addAF

Pathogenic

0.24

BayesDel_noAF

Pathogenic

0.28

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.65

D;.;.

Eigen

Uncertain

0.60

Eigen_PC

Uncertain

0.61

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Benign

0.81

T;T;T

M_CAP

Pathogenic

0.38

MetaRNN

Pathogenic

0.87

D;D;D

MetaSVM

Benign

-0.29

MutationAssessor

Uncertain

2.4

M;M;.

PhyloP100

8.7

PrimateAI

Pathogenic

0.82

PROVEAN

Pathogenic

-5.0

D;D;.

REVEL

Pathogenic

0.74

Sift

Pathogenic

0.0

D;T;.

Sift4G

Pathogenic

0.0

D;D;.

Polyphen

1.0

D;.;.

Vest4

0.96

MutPred

0.68

Loss of sheet (P = 0.0025);Loss of sheet (P = 0.0025);.;

MVP

0.81

MPC

0.21

ClinPred

1.0

GERP RS

5.3

PromoterAI

0.0082

Neutral

(source)

Varity_R

0.93

gMVP

0.90

Mutation Taster

=8/92

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

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over