Recombinant Human Chitotriosidase-1 (CHIT1)

Code CSB-YP623792HU
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Source Yeast
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Code CSB-EP623792HU
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Source E.coli
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Code CSB-EP623792HU-B
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Source E.coli
Conjugate Avi-tag Biotinylated
E. coli biotin ligase (BirA) is highly specific in covalently attaching biotin to the 15 amino acid AviTag peptide. This recombinant protein was biotinylated in vivo by AviTag-BirA technology, which method is BriA catalyzes amide linkage between the biotin and the specific lysine of the AviTag.
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Code CSB-BP623792HU
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Source Baculovirus
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Code CSB-MP623792HU
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Source Mammalian cell
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Product Details

>85% (SDS-PAGE)
Target Names
Uniprot No.
Alternative Names
CHI3; CHIT; CHIT1; CHIT1_HUMAN; CHITD; Chitinase 1; Chitinase 1 (chitotriosidase); Chitinase-1; Chitotriosidase; Chitotriosidase-1; EC; FLJ00314; MGC125322; Plasma methylumbelliferyl tetra N acetylchitotetraoside hydrolase
Homo sapiens (Human)
Expression Region
Target Protein Sequence
Protein Length
Full Length of Mature Protein
Tag Info
Tag type will be determined during the manufacturing process.
The tag type will be determined during production process. If you have specified tag type, please tell us and we will develop the specified tag preferentially.
Lyophilized powder
Note: We will preferentially ship the format that we have in stock, however, if you have any special requirement for the format, please remark your requirement when placing the order, we will prepare according to your demand.
Buffer before Lyophilization
Tris/PBS-based buffer, 6% Trehalose, pH 8.0
We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Please reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL.We recommend to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20℃/-80℃. Our default final concentration of glycerol is 50%. Customers could use it as reference.
Troubleshooting and FAQs
Storage Condition
Store at -20°C/-80°C upon receipt, aliquoting is necessary for mutiple use. Avoid repeated freeze-thaw cycles.
Shelf Life
The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself.
Generally, the shelf life of liquid form is 6 months at -20°C/-80°C. The shelf life of lyophilized form is 12 months at -20°C/-80°C.
Lead Time
Delivery time may differ from different purchasing way or location, please kindly consult your local distributors for specific delivery time.
Note: All of our proteins are default shipped with normal blue ice packs, if you request to ship with dry ice, please communicate with us in advance and extra fees will be charged.
Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.
Please contact us to get it.

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Target Background

Degrades chitin, chitotriose and chitobiose. May participate in the defense against nematodes and other pathogens. Isoform 3 has no enzymatic activity.
Gene References into Functions
  1. CHIT1 might be considered as a circulating biomarker in polycythemia vera. Additional studies are needed to clarify the role of CHIT1 in promoting disease progression and bone marrow fibrosis in polycythemia vera. PMID: 29993340
  2. Data suggest that up-regulation of amniotic fluid chitotriosidase may serve as prenatal diagnostic biomarker for lysosomal storage disorders, more specifically for Gaucher and Niemann-Pick A/B diseases; these findings appear to result from gene duplication. This study was conducted in India. PMID: 30205089
  3. Circulating chitotriosidase is a test which can potentially be used for the monitoring of critical limb ischemia patients without other inflammatory conditions. PMID: 29263045
  4. All patients with NPC1 mutations had high ChT activity, high CCL18/PARC concentrations and/or Niemann-Pick disease type C suspicion index scores >/=70. PMID: 28222799
  5. The total allele frequency of the dup24bp in the CHIT1 gene in the Ukrainian population was determined, which amounted to 0.26 (323/1244) that is higher than in the Western European population. PMID: 29227082
  6. the two variations of CHIT1, rs61745299 and rs35920428, increase expression of the gene and are associated with colorectal cancer in Chinese Han populations PMID: 27153562
  7. SCD children are at risk of developing premature atherogenic changes. Plasma chitotriosidase and CIMT may represent useful predictors of these changes. PMID: 28677113
  8. chitotriosidase as a possible chronic inflammation marker in children with common variable immunodeficiency and early atherosclerosis PMID: 27705887
  9. Processivity and the rate constant of dissociation of Human chitotriosidase (HCHT) were found to be in-between those, characteristic to processive exo-enzymes, like SmChiA and randomly acting non-processive endo-enzymes, like SmChiC. Apart from increasing the affinity for chitin, CBM had no major effect on kinetic properties of HCHT. PMID: 28129403
  10. PMA stimulation and preincubation with rhDNase increased CHIT-1 activity in culture supernatants from non-CF and CF donors.Stimulation of isolated leucocytes with PMA and treatment with rhDNase interfered with anti-fungal defence mechanisms. PMID: 27324468
  11. X-Ray crystal structure of the full length CHIT1 reveals features of its chitin binding domain. PMID: 27111557
  12. Deletion in the CHIT1 gene is associated with Chitotriosidase deficiency disease. PMID: 27129798
  13. confirmed the strong association between chitotriosidase activity and the markers of progressive kidney disease in a cohort of type 2 diabetic patients; also demonstrated that diabetic patients genetically lacking the full active enzyme (with at least one CHIT1 functionally mutated allele) are at lower risk of developing nephropathy compared to patients having wild genotype PMID: 26589000
  14. BALF chitotriosidase activity is increased in patients with sarcoidosis. PMID: 26847098
  15. study indicates that genotype analysis by HRM-PCR is a fast, reliable, and highly accurate screening approach for identifying the 24-bp duplication in CHIT1 exon 10. PMID: 26624962
  16. CHIT-1 is expressed during the process of differentiation and maturation of dendritic cells in a time-dependent manner. PMID: 26026464
  17. No correlation between CHIT1 24-base pair duplication polymorphism and prognosis in sarcoidosis was shown, but possible protective role of homozygous condition for CHIT1 24-base pair duplication polymorphism is suggested. PMID: 26422563
  18. the presence of product polymers of 40 sugar moieties and higher starts to disappear already at 8% degradation for HCHT50-W31A. Such behavior contrast that of the wild type and HCHT-W218A and resembles the action of endo-nonprocessive chitinases PMID: 26621384
  19. Our findings indicate that chitotriosidase and S10012A are useful in diagnosis and detection of subclinical inflammation and/or assessment of disease activity in FMF patients. PMID: 26339162
  20. Serum CHIT1 rs3831317 and CHI3L1 rs4950928 genotypes were examined in patients with asthma and COPD in a European study to evaluate factors that affect chitinase levels in patients with severe airway disease. PMID: 26372680
  21. study found the 24-bp insertion in the gene for chitotriosidase was associated with the development of mycetoma caused by M. mycetomatis PMID: 26332238
  22. The study presents new X-ray data to resolutions of between 0.95 and 1.10 A for CHIT1 in apo and pseudo-apo forms and in complex with chitobiose, an N-acetylglucosamine (NAG) dimer. PMID: 26143917
  23. elevated in pregnant women with threatened preterm labor PMID: 25005858
  24. The two Chit1 isoforms combine features of exo-processive and endo-nonprocessive chitinases with the somewhat unusual carbohydrate binding module 14 to reach a high degree of efficiency. PMID: 26116146
  25. Catalytic deficiency of chitotriosidase has a very high frequency in Amerindians highly exposed to chitin from enteroparasites and diet. PMID: 25256524
  26. Report a significant association between 24 bp duplication in CHIT1 gene polymorphism and asthma in the studied North Indian population. PMID: 24928104
  27. c.1049_1072dup24 in CHIT1 presents an allele frequency of 0.22 in Spain.p.G102S in CHIT1 presents an allele frequency of 0.27 in Spain.Ser102 CHIT1 allele caused a significant reduction of chitotriosidase activity. PMID: 24060732
  28. The results of the current study suggest that CHIT1 duplication cannot be the sole explanation for Aspergillus positive sputum in CF patients. PMID: 23359515
  29. may be a useful biochemical marker of fetal compromise that reflects the severity of fetoplacental blood flow resistance in pregnancies complicated by preeclampsia PMID: 23844836
  30. Glycolipids or glycoproteins with LacNAc and LacdiNAc represent potential CHIT1 substrates. PMID: 24462685
  31. age, gender, TNFalpha, hemocysteine, sleep efficiency and waist circumference were responsible for approximately 14% of CHIT variation. PMID: 23692992
  32. HCHT with higher endo-activity and a higher transglycosylation potential. PMID: 24036453
  33. increased serum levels is a good prtognostic marker for recovery from World Trade Center lung injury PMID: 23744081
  34. The association of chitotriosidase (ChT) with age remains significant after controlling for neopterin and IL-6 changes with age, suggesting that ChT levels reflect a macrophage state distinct from acute macrophage activation or inflammatory state. PMID: 23525479
  35. serum chitotriosidase is more highly expressed in ST-segment elevation myocardial infaction than in non ST-segment elevation myocardial infarction and unstable angina pectoris PMID: 22986554
  36. These results indicate that the nonsynonymous A442G polymorphism in CHIT1 is associated with risk of atopy. PMID: 23706714
  37. CCL18 and YKL-40 levels and CHIT1 activity are enhanced in allergic airway inflammation and thus may contribute to airway remodelling in asthma. PMID: 23331560
  38. results showed that the expression of AMCase and CHIT-1 were differently modulated in monocyte macrophages at different stage of maturation. The behavior of these two active chitinase suggests that in the immune response their role is complementary. PMID: 23129258
  39. Serum CHIT concentrations are significantly higher in patients than in healthy controls and are directly correlated with angiotensin converting enzyme (ACE)levels. PMID: 22878841
  40. This work analyses the chitin-binding and catalytic domains of the human macrophage chitotriosidase and investigates the physiological role of this glycoside hydrolase in a complex mechanism such as the innate immune system, esp. its antifungal activity. PMID: 21674664
  41. allelic and genotypic frequencies of the 24-bp Dup in CHIT1 gene in homozygotes and heterozygotes were in accordance to worldwide reports PMID: 23234739
  42. Data suggest that serum chitotriosidase is increased during first trimester in women who later develop pre-eclampsia as compared to control subjects; serum metastin is decreased; serum placenta growth factor is decreased. PMID: 22770630
  43. elevates in polycystic ovary syndrome independent of obesity PMID: 22718099
  44. Patients with systemic sclerosis and interstitial lung disease show high levels of circulating Chit1 activity that correlate with disease severity. PMID: 22826322
  45. Serum Chitotriosidase activity was significantly higher in the preeclampsia group as compared with levels in the control group. PMID: 22183425
  46. study demonstrated genetic associations between chitinase gene variants and lung function level and rate of decline in chronic obstructive pulmonary disease patients from the Lung Health Study PMID: 22200767
  47. Data suggest that serum chitotriosidase activity (a possible marker of inflammatory processes) is increased in obese adolescents with impaired glucose tolerance. PMID: 22206738
  48. activity of chitotriosidase in plasma was statistically higher in severe endometriosis patients than women without endometriosis PMID: 22132778
  49. Data confirm elevation of chitotriosidase activity in patients with active cerebral adrenoleukodystrophy, and suggest that these levels predict prognosis of patients with C-ALD undergoing transplantation. PMID: 22014002
  50. Human chitotriosidase degrades chitosan primarily via an endoprocessive mechanism: the main hydrolysis product is chitobiose, (i.e., the acetylated dimer) fully consistent with its role as a "normal" processive enzyme. PMID: 22192075

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Subcellular Location
Secreted. Lysosome. Note=A small proportion is lysosomal.
Protein Families
Glycosyl hydrolase 18 family, Chitinase class II subfamily
Tissue Specificity
Detected in spleen. Secreted by cultured macrophages.
Database Links

HGNC: 1936

OMIM: 600031

KEGG: hsa:1118

STRING: 9606.ENSP00000356198

UniGene: Hs.201688

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