Genetic Variant CLRN1:p.Thr186Ser (chr3-150928079-T-A) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 4P and 2B. PM1PM2BP4_Moderate

The NM_174878.3(CLRN1):c.556A>T(p.Thr186Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,562 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 17/22 in silico tools predict a benign outcome for this variant. 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. T186N) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

CLRN1
NM_174878.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.851

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:

ENSG00000260234 (HGNC:):

ENSG00000260234 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

PM1

In a chain Clarin-1 (size 231) in uniprot entity CLRN1_HUMAN there are 47 pathogenic changes around while only 2 benign (96%) in NM_174878.3

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.0866994).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CLRN1	NM_174878.3 link	c.556A>T	p.Thr186Ser	missense_variant	Exon 3 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.556A>T	p.Thr186Ser	missense_variant	Exon 3 of 3	1	NM_174878.3	ENSP00000322280.1		P58418-3
ENSG00000260234	ENST00000569170.5 link	n.160+13503A>T		intron_variant	Intron 1 of 10	1		ENSP00000457784.1		H3BUT2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461562

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727072

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33398

American (AMR)

AF:

0.00

AC:

AN:

44646

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26128

East Asian (EAS)

AF:

0.00

AC:

AN:

39686

South Asian (SAS)

AF:

0.00

AC:

AN:

86206

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53418

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1111938

Other (OTH)

AF:

0.00

AC:

AN:

60374

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.075

BayesDel_addAF

Benign

-0.13

BayesDel_noAF

Benign

-0.43

CADD

Benign

(source)

DANN

Benign

0.92

DEOGEN2

Benign

0.12

.;T;.

Eigen

Benign

-0.60

Eigen_PC

Benign

-0.41

FATHMM_MKL

Benign

0.75

LIST_S2

Benign

0.50

T;T;T

M_CAP

Benign

0.020

MetaRNN

Benign

0.087

T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.69

.;N;.

PhyloP100

0.85

PrimateAI

Benign

0.35

PROVEAN

Benign

0.94

N;N;N

REVEL

Benign

0.063

Sift

Benign

0.65

T;T;T

Sift4G

Benign

0.54

T;T;T

Polyphen

0.0010

B;B;.

Vest4

0.29

MutPred

0.26

.;Gain of disorder (P = 0.0421);.;

MVP

0.65

MPC

0.021

ClinPred

0.34

GERP RS

2.3

Varity_R

0.042

gMVP

0.45

Mutation Taster

=80/20

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

LitVar

Below is the list of publications found by LitVar for variant 3:150928079 T>A . It may be empty.

chr3-150928079-T-A

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

LitVar

Other links and lift over