chitinase acidic | Chitinases | IUPHAR Guide to IMMUNOPHARMACOLOGY

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chitinase acidic

  Target has curated data in GtoImmuPdb

Target id: 2982

Nomenclature: chitinase acidic

Abbreviated Name: AMCase

Family: Chitinases

Annotation status:  image of a grey circle Awaiting annotation/under development. Please contact us if you can help with annotation.  » Email us

Gene and Protein Information
Species TM AA Chromosomal Location Gene Symbol Gene Name Reference
Human - 476 1p13.2 CHIA chitinase acidic
Mouse - 473 3 F2.2 Chia1 chitinase, acidic 1
Rat - 473 2q34 Chia chitinase, acidic
Gene and Protein Information Comments
Several transcript variants from the human gene have been reported, but these produce only three protein isoforms (isoform c is the longest at 467 amino acids, isoform a has a shorter N-terminus and is 368 amino acids, and isoform c initiates from an alternative downstream AUG and is 315 amino acids).
Previous and Unofficial Names
chitinase, acidic | chitinase, acidic 1 | chitinase | CHIT2
Database Links
ChEMBL Target
Ensembl Gene
Entrez Gene
Human Protein Atlas
RefSeq Nucleotide
RefSeq Protein

Download all structure-activity data for this target as a CSV file

Key to terms and symbols View all chemical structures Click column headers to sort
Ligand Sp. Action Value Parameter Reference
compound 7f [PMID: 29283260] Hs Inhibition 7.8 pIC50 2
pIC50 7.8 (IC50 1.4x10-8 M) [2]
compound 7f [PMID: 29283260] Mm Inhibition 7.7 pIC50 2
pIC50 7.7 (IC50 1.9x10-8 M) [2]
View species-specific inhibitor tables
Immunopharmacology Comments
AMCase has been shown to be produced during type 2 inflammatory responses [5], such as those mediating allergic asthma [1,3]. As part of this type 2 response, AMCase activity causes IL-13 pathway activation. Laboratory studies have shown that AMCase neutralization, genetic ablation or pharmacological inhibition results in reduced IL-13-mediated allergic airway inflammation. Selective AMCase inhibitors are subsequently being investigated for anti-inflammatory potential in asthma [2].
Immuno Process Associations
Immuno Process:  Inflammation
GO Annotations:  Associated to 1 GO processes
GO:0002532 production of molecular mediator involved in inflammatory response IDA
Immuno Process:  Cytokine production & signalling
GO Annotations:  Associated to 1 GO processes
GO:0090197 positive regulation of chemokine secretion IDA
Immuno Process:  Chemotaxis & migration
GO Annotations:  Associated to 1 GO processes
GO:0090197 positive regulation of chemokine secretion IDA
Clinically-Relevant Mutations and Pathophysiology Comments
Mutations in this gene are associated with asthma susceptibility.
Biologically Significant Variants
Type:  Naturally occurring SNP
Species:  Human
Description:  The rs10494132 polymorphism of CHIA might be a risk factor for asthma.
SNP accession: 
References:  4
General Comments
Chitinase degrades the chitin in the cell walls of fungi, arthropods and nematodes.


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1. Elias JA, Homer RJ, Hamid Q, Lee CG. (2005) Chitinases and chitinase-like proteins in T(H)2 inflammation and asthma. J. Allergy Clin. Immunol., 116 (3): 497-500. [PMID:16159614]

2. Mazur M, Olczak J, Olejniczak S, Koralewski R, Czestkowski W, Jedrzejczak A, Golab J, Dzwonek K, Dymek B, Sklepkiewicz PL et al.. (2018) Targeting Acidic Mammalian chitinase Is Effective in Animal Model of Asthma. J. Med. Chem., 61 (3): 695-710. [PMID:29283260]

3. Shen CR, Juang HH, Chen HS, Yang CJ, Wu CJ, Lee MH, Hwang YS, Kuo ML, Chen YS, Chen JK et al.. (2015) The Correlation between Chitin and Acidic Mammalian Chitinase in Animal Models of Allergic Asthma. Int J Mol Sci, 16 (11): 27371-7. [PMID:26580611]

4. Zhu Y, Yan X, Zhai C, Yang L, Li M. (2017) Association between risk of asthma and gene polymorphisms in CHI3L1 and CHIA: a systematic meta-analysis. BMC Pulm Med, 17 (1): 193. [PMID:29233108]

5. Zhu Z, Zheng T, Homer RJ, Kim YK, Chen NY, Cohn L, Hamid Q, Elias JA. (2004) Acidic mammalian chitinase in asthmatic Th2 inflammation and IL-13 pathway activation. Science, 304 (5677): 1678-82. [PMID:15192232]

How to cite this page

Chitinases: chitinase acidic. Last modified on 27/03/2019. Accessed on 05/07/2020. IUPHAR/BPS Guide to PHARMACOLOGY,