1-111241360-C-G

Variant names:

• chr1-111241360-C-G
• NM_004000.3:c.952C>G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_004000.3(CHI3L2):​c.952C>G​(p.Arg318Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000345 in 1,448,644 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. 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. R318W) has been classified as Benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000035 (0 hom.)
• Consequence: CHI3L2 NM_004000.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.490

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

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=0.23611796).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CHI3L2	NM_004000.3	c.952C>G	p.Arg318Gly	missense_variant	Exon 9 of 11	ENST00000369748.9	NP_003991.2
CHI3L2	NM_001025197.1	c.922C>G	p.Arg308Gly	missense_variant	Exon 8 of 10		NP_001020368.1
CHI3L2	NM_001025199.2	c.715C>G	p.Arg239Gly	missense_variant	Exon 8 of 10		NP_001020370.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CHI3L2	ENST00000369748.9	c.952C>G	p.Arg318Gly	missense_variant	Exon 9 of 11	1	NM_004000.3	ENSP00000358763.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000345 AC: 5 AN: 1448644 Hom.: 0 Cov.: 30 AF XY: 0.00000416 AC XY: 3 AN XY: 721534

Gnomad4 AFR exome AF: 0.0000300

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: 0.00000364

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.31
BayesDel_addAF	Benign	-0.14	T
BayesDel_noAF	Benign	-0.43
CADD	Benign	16
DANN	Uncertain	0.98
DEOGEN2	Benign	0.013	T;.;T;.;.;T;T
Eigen	Benign	-0.34
Eigen_PC	Benign	-0.56
FATHMM_MKL	Benign	0.040	N
LIST_S2	Benign	0.77	.;T;T;.;T;T;T
M_CAP	Benign	0.014	T
MetaRNN	Benign	0.24	T;T;T;T;T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.7	L;.;L;.;.;.;.
PrimateAI	Benign	0.27	T
PROVEAN	Uncertain	-2.4	N;N;N;D;D;N;D
REVEL	Benign	0.12
Sift	Benign	0.25	T;T;T;T;T;T;T
Sift4G	Benign	0.33	T;T;T;T;T;T;T
Polyphen		1.0	D;.;D;.;.;.;.
Vest4		0.34
MutPred		0.58		Loss of stability (P = 0.0413);.;Loss of stability (P = 0.0413);.;.;.;.;
MVP		0.48
MPC		0.074
ClinPred		0.80	D
GERP RS		3.6
Varity_R		0.36
gMVP		0.43

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr1-111783982;