Genetic Variant CLEC18B:p.Val333Leu (chr16-74411022-C-A) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_001385193.1(CLEC18B):c.997G>T(p.Val333Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000132 in 152,006 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 59)

Exomes 𝑓: 0.000090 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

CLEC18B
NM_001385193.1 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.806

Variant links:

Genes affected

CLEC18B (HGNC:33849): (C-type lectin domain family 18 member B) Predicted to enable polysaccharide binding activity. Predicted to be located in Golgi apparatus; endosome; and sarcoplasmic reticulum. Predicted to be active in extracellular space. [provided by Alliance of Genome Resources, Apr 2022]

CLEC18B links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.20893773).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CLEC18B	NM_001385193.1 link	c.997G>T	p.Val333Leu	missense_variant	Exon 9 of 12	ENST00000682950.1	NP_001372122.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CLEC18B	ENST00000682950.1 link	c.997G>T	p.Val333Leu	missense_variant	Exon 9 of 12		NM_001385193.1	ENSP00000507367.1		A0A804HJ60
CLEC18B	ENST00000339953.9 link	c.997G>T	p.Val333Leu	missense_variant	Exon 9 of 13	1		ENSP00000341051.5		Q6UXF7-1

Frequencies

GnomAD3 genomes

AF:

0.0000132

AC:

AN:

152006

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000609

AC:

AN:

246346

Hom.:

AF XY:

0.0000751

AC XY:

AN XY:

133168

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.000102

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000127

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

Data not reliable, filtered out with message: AS_VQSR

AF:

0.0000902

AC:

131

AN:

1451662

Hom.:

Cov.:

128

AF XY:

0.0000928

AC XY:

AN XY:

722228

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000897

Gnomad4 ASJ exome

AF:

0.000154

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000108

Gnomad4 OTH exome

AF:

0.0000667

GnomAD4 genome

AF:

0.0000132

AC:

AN:

152006

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74262

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000963

Hom.:

ExAC

AF:

0.000108

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Feb 16, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.997G>T (p.V333L) alteration is located in exon 9 (coding exon 9) of the CLEC18B gene. This alteration results from a G to T substitution at nucleotide position 997, causing the valine (V) at amino acid position 333 to be replaced by a leucine (L). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.13

BayesDel_addAF

Benign

-0.19

BayesDel_noAF

Benign

-0.51

CADD

Benign

DANN

Benign

0.97

DEOGEN2

Benign

0.0065

.;.;T

Eigen

Benign

-0.75

Eigen_PC

Benign

-0.65

FATHMM_MKL

Benign

0.30

LIST_S2

Uncertain

0.90

D;.;D

M_CAP

Benign

0.011

MetaRNN

Benign

0.21

T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.14

.;.;N

PrimateAI

Uncertain

0.54

PROVEAN

Benign

-0.81

.;.;N

REVEL

Benign

0.064

Sift

Benign

0.040

.;.;D

Sift4G

Benign

0.13

T;T;T

Polyphen

0.22

.;.;B

Vest4

0.20

MutPred

0.58

Loss of MoRF binding (P = 0.0934);Loss of MoRF binding (P = 0.0934);Loss of MoRF binding (P = 0.0934);

MVP

0.030

ClinPred

0.053

GERP RS

0.90

Varity_R

0.068

gMVP

0.18

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

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. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over