Variant 1-111238900-A-G details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2PP3_Strong

The NM_004000.3(CHI3L2):c.886A>G(p.Thr296Ala) variant causes a missense change. The variant allele was found at a frequency of 0.0000193 in 1,609,388 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000017 ( 0 hom. )

Consequence

CHI3L2
NM_004000.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.36

Variant links:

Genes affected

CHI3L2 (HGNC:1933): (chitinase 3 like 2) The protein encoded by this gene is similar to bacterial chitinases but lacks chitinase activity. The encoded protein is secreted and is involved in cartilage biogenesis. Several transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Apr 2012]

CHI3L2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.968

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
CHI3L2	NM_004000.3 linkuse as main transcript	c.886A>G	p.Thr296Ala	missense_variant	8/11	ENST00000369748.9
CHI3L2	NM_001025197.1 linkuse as main transcript	c.856A>G	p.Thr286Ala	missense_variant	7/10
CHI3L2	NM_001025199.2 linkuse as main transcript	c.649A>G	p.Thr217Ala	missense_variant	7/10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CHI3L2	ENST00000369748.9 linkuse as main transcript	c.886A>G	p.Thr296Ala	missense_variant	8/11	1	NM_004000.3	P1	Q15782-4

Frequencies

GnomAD3 genomes

AF:

0.0000394

AC:

AN:

152220

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.0000244

AC:

AN:

245862

Hom.:

AF XY:

0.0000301

AC XY:

AN XY:

133078

show subpopulations

Gnomad AFR exome

AF:

0.0000623

Gnomad AMR exome

AF:

0.0000304

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000335

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000179

Gnomad OTH exome

AF:

0.000168

GnomAD4 exome

AF:

0.0000172

AC:

AN:

1457168

Hom.:

Cov.:

AF XY:

0.0000221

AC XY:

AN XY:

724914

show subpopulations

Gnomad4 AFR exome

AF:

0.0000302

Gnomad4 AMR exome

AF:

0.000138

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000117

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000991

Gnomad4 OTH exome

AF:

0.0000997

GnomAD4 genome

AF:

0.0000394

AC:

AN:

152220

Hom.:

Cov.:

AF XY:

0.0000538

AC XY:

AN XY:

74366

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.0000654

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.000478

Alfa

AF:

0.000142

Hom.:

Bravo

AF:

0.0000567

ExAC

AF:

0.0000247

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Apr 12, 2024

The c.886A>G (p.T296A) alteration is located in exon 8 (coding exon 8) of the CHI3L2 gene. This alteration results from a A to G substitution at nucleotide position 886, causing the threonine (T) at amino acid position 296 to be replaced by an alanine (A). 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

Uncertain

0.36

BayesDel_addAF

Benign

-0.094

BayesDel_noAF

Benign

-0.19

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.068

T;.;T;.;.

Eigen

Uncertain

0.34

Eigen_PC

Benign

0.11

FATHMM_MKL

Uncertain

0.80

LIST_S2

Benign

0.56

.;T;T;.;T

M_CAP

Benign

0.058

MetaRNN

Pathogenic

0.97

D;D;D;D;D

MetaSVM

Benign

-0.59

MutationAssessor

Pathogenic

3.5

M;.;M;.;.

MutationTaster

Benign

0.64

D;D;D;N;N

PrimateAI

Uncertain

0.58

PROVEAN

Pathogenic

-4.4

D;D;D;D;D

REVEL

Uncertain

0.30

Sift

Uncertain

0.026

D;D;D;D;D

Sift4G

Uncertain

0.0020

D;D;D;D;D

Polyphen

1.0

D;.;D;.;.

Vest4

0.71

MutPred

0.81

Loss of phosphorylation at T296 (P = 0.0476);.;Loss of phosphorylation at T296 (P = 0.0476);.;.;

MVP

0.78

MPC

0.12

ClinPred

0.73

GERP RS

2.2

Varity_R

0.65

gMVP

0.39

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.040

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