rs2764543

chr1-111236476-T-G

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_004000.3(CHI3L2):c.735+323T>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.25 in 152,118 control chromosomes in the GnomAD database, including 5,596 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.25 (5596 hom., cov: 31)
• Consequence: CHI3L2 NM_004000.3 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.108

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 Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.85).
• BA1: GnomAd4 highest subpopulation (NFE) allele frequency at 95% confidence interval = 0.335 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CHI3L2	NM_004000.3	c.735+323T>G		intron_variant		ENST00000369748.9
CHI3L2	NM_001025197.1	c.705+323T>G		intron_variant
CHI3L2	NM_001025199.2	c.498+323T>G		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CHI3L2	ENST00000369748.9	c.735+323T>G		intron_variant		1	NM_004000.3	P1

Frequencies

GnomAD3 genomes AF: 0.250 AC: 37999 AN: 152000 Hom.: 5601 Cov.: 31

Gnomad AFR AF: 0.0971

Gnomad AMI AF: 0.192

Gnomad AMR AF: 0.216

Gnomad ASJ AF: 0.347

Gnomad EAS AF: 0.199

Gnomad SAS AF: 0.239

Gnomad FIN AF: 0.322

Gnomad MID AF: 0.316

Gnomad NFE AF: 0.339

Gnomad OTH AF: 0.278

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.250 AC: 37991 AN: 152118 Hom.: 5596 Cov.: 31 AF XY: 0.246 AC XY: 18280 AN XY: 74350

Gnomad4 AFR AF: 0.0969

Gnomad4 AMR AF: 0.216

Gnomad4 ASJ AF: 0.347

Gnomad4 EAS AF: 0.199

Gnomad4 SAS AF: 0.240

Gnomad4 FIN AF: 0.322

Gnomad4 NFE AF: 0.339

Gnomad4 OTH AF: 0.277

Alfa AF: 0.315 Hom.: 3695

Bravo AF: 0.234

Asia WGS AF: 0.239 AC: 830 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.85
Cadd	Benign	7.4
Dann	Benign	0.77

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

Other links and lift over

dbSNP: rs2764543; hg19: chr1-111779098; COSMIC: COSV63873687; COSMIC: COSV63873687;