1-111236125-A-G

Variant names:

• chr1-111236125-A-G
• rs753494309
• NM_004000.3:c.707A>G

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_004000.3(CHI3L2):​c.707A>G​(p.Asp236Gly) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. D236A) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: CHI3L2 NM_004000.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 5.74
• Publications: 0 publications found

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]

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CHI3L2	NM_004000.3	c.707A>G	p.Asp236Gly	missense_variant	Exon 7 of 11	ENST00000369748.9	NP_003991.2
CHI3L2	NM_001025197.1	c.677A>G	p.Asp226Gly	missense_variant	Exon 6 of 10		NP_001020368.1
CHI3L2	NM_001025199.2	c.470A>G	p.Asp157Gly	missense_variant	Exon 6 of 10		NP_001020370.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CHI3L2	ENST00000369748.9	c.707A>G	p.Asp236Gly	missense_variant	Exon 7 of 11	1	NM_004000.3	ENSP00000358763.4

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.42
BayesDel_addAF	Uncertain	0.036	T
BayesDel_noAF	Benign	-0.19
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Benign	0.064	T;.;T;.;.;.;.;T
Eigen	Benign	-0.013
Eigen_PC	Benign	-0.13
FATHMM_MKL	Benign	0.61	D
LIST_S2	Benign	0.77	.;T;T;.;T;T;T;T
M_CAP	Benign	0.040	D
MetaRNN	Uncertain	0.71	D;D;D;D;D;D;D;D
MetaSVM	Benign	-0.67	T
MutationAssessor	Pathogenic	3.0	M;.;M;.;.;.;.;.
PhyloP100		5.7
PrimateAI	Benign	0.42	T
PROVEAN	Pathogenic	-5.4	D;D;D;D;D;D;D;D
REVEL	Benign	0.15
Sift	Uncertain	0.0010	D;D;D;D;D;D;D;T
Sift4G	Uncertain	0.0040	D;D;D;D;D;D;D;T
Polyphen		1.0	D;.;D;.;.;.;.;.
Vest4		0.59
MutPred		0.71		Gain of glycosylation at P239 (P = 0.1199);.;Gain of glycosylation at P239 (P = 0.1199);.;.;.;.;.;
MVP		0.37
MPC		0.12
ClinPred		0.99	D
GERP RS		2.9
Varity_R		0.72
gMVP		0.54
Mutation Taster		=58/42	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.26		Details are displayed if max score is > 0.2
DS_DL_spliceai		0.26		Position offset: 28

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs753494309; hg19: chr1-111778747;