Genetic Variant NM_001276.4:c.1082G>A (chr1-203179515-C-T) – ACMG Classification: Uncertain_significance (3 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2PP3

The NM_001276.4(CHI3L1):c.1082G>A(p.Gly361Asp) variant causes a missense change. The variant allele was found at a frequency of 0.0000924 in 1,590,172 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 0.000072 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000095 ( 0 hom. )

Consequence

CHI3L1
NM_001276.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 4.53

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.826

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CHI3L1	NM_001276.4 link	c.1082G>A	p.Gly361Asp	missense_variant	Exon 10 of 10	ENST00000255409.8	NP_001267.2	P36222A0A024R969

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
CHI3L1	ENST00000255409.8 link	c.1082G>A	p.Gly361Asp	missense_variant	Exon 10 of 10	1	NM_001276.4	ENSP00000255409.3	P36222
CHI3L1	ENST00000404436.2 link	c.386G>A	p.Gly129Asp	missense_variant	Exon 4 of 4	2		ENSP00000385350.2	H0Y3U8
CHI3L1	ENST00000473185.1 link	n.1336G>A		non_coding_transcript_exon_variant	Exon 2 of 2	2
CHI3L1	ENST00000478742.1 link	n.444G>A		non_coding_transcript_exon_variant	Exon 2 of 2	2

Frequencies

GnomAD3 genomes

AF:

0.0000723

AC:

AN:

152214

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:

0.0000941

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000841

AC:

AN:

237772

Hom.:

AF XY:

0.0000934

AC XY:

AN XY:

128504

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.000239

Gnomad NFE exome

AF:

0.000138

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000946

AC:

136

AN:

1437958

Hom.:

Cov.:

AF XY:

0.000101

AC XY:

AN XY:

712338

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000238

Gnomad4 FIN exome

AF:

0.0000757

Gnomad4 NFE exome

AF:

0.000117

Gnomad4 OTH exome

AF:

0.0000169

GnomAD4 genome

AF:

0.0000723

AC:

AN:

152214

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74350

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:

0.0000941

Gnomad4 NFE

AF:

0.000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000125

Hom.:

Bravo

AF:

0.0000907

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000349

AC:

ExAC

AF:

0.0000659

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Apr 19, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1082G>A (p.G361D) alteration is located in exon 10 (coding exon 10) of the CHI3L1 gene. This alteration results from a G to A substitution at nucleotide position 1082, causing the glycine (G) at amino acid position 361 to be replaced by an aspartic acid (D). 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

0.48

BayesDel_addAF

Benign

-0.19

BayesDel_noAF

Benign

-0.26

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.78

Eigen

Uncertain

0.43

Eigen_PC

Uncertain

0.27

FATHMM_MKL

Uncertain

0.83

LIST_S2

Uncertain

0.93

M_CAP

Benign

0.048

MetaRNN

Pathogenic

0.83

MetaSVM

Benign

-0.69

MutationAssessor

Pathogenic

3.2

PrimateAI

Benign

0.48

PROVEAN

Pathogenic

-6.7

REVEL

Uncertain

0.35

Sift

Pathogenic

0.0

Sift4G

Pathogenic

0.0010

Polyphen

1.0

Vest4

0.78

MVP

0.48

MPC

0.45

ClinPred

0.88

GERP RS

2.8

Varity_R

0.90

gMVP

0.49

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