Variant 1-111238913-G-C details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_004000.3(CHI3L2):c.899G>C(p.Gly300Ala) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000567 in 1,603,756 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00029 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000032 ( 0 hom. )

Consequence

CHI3L2
NM_004000.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.56

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 Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
CHI3L2	NM_004000.3 linkuse as main transcript	c.899G>C	p.Gly300Ala	missense_variant	8/11	ENST00000369748.9
CHI3L2	NM_001025197.1 linkuse as main transcript	c.869G>C	p.Gly290Ala	missense_variant	7/10
CHI3L2	NM_001025199.2 linkuse as main transcript	c.662G>C	p.Gly221Ala	missense_variant	7/10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CHI3L2	ENST00000369748.9 linkuse as main transcript	c.899G>C	p.Gly300Ala	missense_variant	8/11	1	NM_004000.3	P1	Q15782-4

Frequencies

GnomAD3 genomes

AF:

0.000289

AC:

AN:

152224

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00104

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000116

AC:

AN:

240404

Hom.:

AF XY:

0.0000768

AC XY:

AN XY:

130170

show subpopulations

Gnomad AFR exome

AF:

0.00157

Gnomad AMR exome

AF:

0.0000637

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000173

GnomAD4 exome

AF:

0.0000324

AC:

AN:

1451414

Hom.:

Cov.:

AF XY:

0.0000263

AC XY:

AN XY:

721788

show subpopulations

Gnomad4 AFR exome

AF:

0.00116

Gnomad4 AMR exome

AF:

0.0000711

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.000100

GnomAD4 genome

AF:

0.000289

AC:

AN:

152342

Hom.:

Cov.:

AF XY:

0.000255

AC XY:

AN XY:

74498

show subpopulations

Gnomad4 AFR

AF:

0.00103

Gnomad4 AMR

AF:

0.0000653

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000456

Hom.:

Bravo

AF:

0.000344

ESP6500AA

AF:

0.00113

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000107

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

Oct 24, 2023

The c.899G>C (p.G300A) alteration is located in exon 8 (coding exon 8) of the CHI3L2 gene. This alteration results from a G to C substitution at nucleotide position 899, causing the glycine (G) at amino acid position 300 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

0.53

BayesDel_addAF

Benign

-0.032

BayesDel_noAF

Pathogenic

0.16

Cadd

Uncertain

Dann

Uncertain

1.0

DEOGEN2

Benign

0.14

T;.;T;.;.

Eigen

Pathogenic

0.81

Eigen_PC

Uncertain

0.64

FATHMM_MKL

Uncertain

0.94

M_CAP

Uncertain

0.12

MetaRNN

Uncertain

0.66

D;D;D;D;D

MetaSVM

Uncertain

0.69

MutationAssessor

Pathogenic

4.0

H;.;H;.;.

MutationTaster

Benign

1.0

D;D;D;D;D

PrimateAI

Uncertain

0.52

PROVEAN

Pathogenic

-5.8

D;D;D;D;D

REVEL

Pathogenic

0.74

Sift

Uncertain

0.0020

D;D;D;D;D

Sift4G

Pathogenic

0.0

D;D;D;D;D

Polyphen

1.0

D;.;D;.;.

Vest4

0.84

MVP

0.93

MPC

0.12

ClinPred

0.53

GERP RS

3.4

Varity_R

0.95

gMVP

0.59

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. 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