Variant 1-111230897-A-G details in Genebe, Genetics Data Aggregator

Variant summary

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

The NM_004000.3(CHI3L2):c.226A>G(p.Lys76Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000737 in 1,614,068 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000077 ( 0 hom. )

Consequence

CHI3L2
NM_004000.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.18

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 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.1188516).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
CHI3L2	NM_004000.3 linkuse as main transcript	c.226A>G	p.Lys76Glu	missense_variant	3/11	ENST00000369748.9	NP_003991.2
CHI3L2	NM_001025197.1 linkuse as main transcript	c.196A>G	p.Lys66Glu	missense_variant	2/10		NP_001020368.1
CHI3L2	NM_001025199.2 linkuse as main transcript	c.-12A>G		5_prime_UTR_variant	2/10		NP_001020370.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CHI3L2	ENST00000369748.9 linkuse as main transcript	c.226A>G	p.Lys76Glu	missense_variant	3/11	1	NM_004000.3	ENSP00000358763	P1	Q15782-4

Frequencies

GnomAD3 genomes

AF:

0.0000394

AC:

AN:

152184

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

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:

0.0000735

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000318

AC:

AN:

251406

Hom.:

AF XY:

0.0000147

AC XY:

AN XY:

135880

show subpopulations

Gnomad AFR exome

AF:

0.0000616

Gnomad AMR exome

AF:

0.00

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:

0.0000528

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.0000773

AC:

113

AN:

1461884

Hom.:

Cov.:

AF XY:

0.0000784

AC XY:

AN XY:

727242

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

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:

0.0000998

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000394

AC:

AN:

152184

Hom.:

Cov.:

AF XY:

0.0000538

AC XY:

AN XY:

74340

show subpopulations

Gnomad4 AFR

AF:

0.0000241

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:

0.0000735

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000329

Hom.:

Bravo

AF:

0.0000453

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000519

AC:

ExAC

AF:

0.0000412

AC:

EpiCase

AF:

0.000164

EpiControl

AF:

0.0000593

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 08, 2022

The c.226A>G (p.K76E) alteration is located in exon 3 (coding exon 3) of the CHI3L2 gene. This alteration results from a A to G substitution at nucleotide position 226, causing the lysine (K) at amino acid position 76 to be replaced by a glutamic acid (E). 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

0.082

BayesDel_addAF

Benign

-0.29

BayesDel_noAF

Benign

-0.47

CADD

Benign

DANN

Benign

0.70

DEOGEN2

Benign

0.0021

T;.;T;.;T;T

Eigen

Benign

-0.40

Eigen_PC

Benign

-0.45

FATHMM_MKL

Benign

0.26

LIST_S2

Benign

0.69

.;T;T;T;T;T

M_CAP

Benign

0.0096

MetaRNN

Benign

0.12

T;T;T;T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.21

N;.;.;.;N;.

MutationTaster

Benign

1.0

D;D;N;N;N

PrimateAI

Benign

0.40

PROVEAN

Benign

-0.10

N;N;N;N;N;N

REVEL

Benign

0.15

Sift

Benign

0.80

T;T;T;T;T;T

Sift4G

Benign

1.0

T;T;T;T;T;T

Polyphen

0.99

D;.;.;.;D;.

Vest4

0.31

MutPred

0.51

Loss of ubiquitination at K76 (P = 0.0118);Loss of ubiquitination at K76 (P = 0.0118);Loss of ubiquitination at K76 (P = 0.0118);.;Loss of ubiquitination at K76 (P = 0.0118);Loss of ubiquitination at K76 (P = 0.0118);

MVP

0.35

MPC

0.059

ClinPred

0.12

GERP RS

1.2

Varity_R

0.23

gMVP

0.66

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