Variant 1-203181202-C-T details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The ENST00000255409.8(CHI3L1):c.671G>A(p.Arg224Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00031 in 1,614,112 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00016 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00033 ( 0 hom. )

Consequence

CHI3L1
ENST00000255409.8 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.309

Variant links:

Genes affected

CHI3L1 (HGNC:1932): (chitinase 3 like 1) Chitinases catalyze the hydrolysis of chitin, which is an abundant glycopolymer found in insect exoskeletons and fungal cell walls. The glycoside hydrolase 18 family of chitinases includes eight human family members. This gene encodes a glycoprotein member of the glycosyl hydrolase 18 family. The protein lacks chitinase activity and is secreted by activated macrophages, chondrocytes, neutrophils and synovial cells. The protein is thought to play a role in the process of inflammation and tissue remodeling. [provided by RefSeq, Sep 2009]

CHI3L1 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.020149618).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CHI3L1	NM_001276.4 linkuse as main transcript	c.671G>A	p.Arg224Gln	missense_variant	7/10	ENST00000255409.8	NP_001267.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris
CHI3L1	ENST00000255409.8 linkuse as main transcript	c.671G>A	p.Arg224Gln	missense_variant	7/10	1	NM_001276.4	ENSP00000255409	P1
CHI3L1	ENST00000404436.2 linkuse as main transcript	c.161G>A	p.Arg54Gln	missense_variant	2/4	2		ENSP00000385350
CHI3L1	ENST00000472064.1 linkuse as main transcript	n.195G>A		non_coding_transcript_exon_variant	2/3	2
CHI3L1	ENST00000473185.1 linkuse as main transcript	n.933G>A		non_coding_transcript_exon_variant	1/2	2

Frequencies

GnomAD3 genomes

AF:

0.000158

AC:

AN:

152128

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:

0.00

Gnomad FIN

AF:

0.000472

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000235

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000227

AC:

AN:

251396

Hom.:

AF XY:

0.000236

AC XY:

AN XY:

135860

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000544

Gnomad SAS exome

AF:

0.000163

Gnomad FIN exome

AF:

0.000323

Gnomad NFE exome

AF:

0.000361

Gnomad OTH exome

AF:

0.000489

GnomAD4 exome

AF:

0.000326

AC:

477

AN:

1461866

Hom.:

Cov.:

AF XY:

0.000289

AC XY:

210

AN XY:

727232

show subpopulations

Gnomad4 AFR exome

AF:

0.0000896

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000504

Gnomad4 SAS exome

AF:

0.000139

Gnomad4 FIN exome

AF:

0.000543

Gnomad4 NFE exome

AF:

0.000370

Gnomad4 OTH exome

AF:

0.000315

GnomAD4 genome

AF:

0.000158

AC:

AN:

152246

Hom.:

Cov.:

AF XY:

0.000161

AC XY:

AN XY:

74452

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:

0.00

Gnomad4 FIN

AF:

0.000472

Gnomad4 NFE

AF:

0.000235

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.000200

Hom.:

Bravo

AF:

0.000159

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.000778

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.000272

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.000436

EpiControl

AF:

0.000415

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

Sep 01, 2021

The c.671G>A (p.R224Q) alteration is located in exon 7 (coding exon 7) of the CHI3L1 gene. This alteration results from a G to A substitution at nucleotide position 671, causing the arginine (R) at amino acid position 224 to be replaced by a glutamine (Q). 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

0.10

BayesDel_addAF

Benign

-0.46

BayesDel_noAF

Benign

-0.59

CADD

Benign

DANN

Uncertain

0.98

DEOGEN2

Benign

0.069

Eigen

Benign

-0.58

Eigen_PC

Benign

-0.61

FATHMM_MKL

Benign

0.11

LIST_S2

Benign

0.19

M_CAP

Benign

0.010

MetaRNN

Benign

0.020

MetaSVM

Benign

-0.95

MutationAssessor

Benign

0.52

MutationTaster

Benign

1.0

PrimateAI

Benign

0.32

PROVEAN

Benign

-1.6

REVEL

Benign

0.055

Sift

Benign

0.20

Sift4G

Benign

0.42

Polyphen

0.55

Vest4

0.14

MVP

0.18

MPC

0.088

ClinPred

0.027

GERP RS

0.41

Varity_R

0.34

gMVP

0.56

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.16

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