Recombinant Human Chitinase-3-like protein 1 (CHI3L1)

Code CSB-YP005346HU
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Source Yeast
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Code CSB-EP005346HU-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-BP005346HU
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Source Baculovirus
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Code CSB-MP005346HU
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Source Mammalian cell
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Product Details

>85% (SDS-PAGE)
Target Names
Uniprot No.
Alternative Names
39 kDa synovial protein; ASRT7; Cartilage glycoprotein 39; CGP-39; CGP39; CH3L1_HUMAN; CHI3L1; chitinase 3 like 1 (cartilage glycoprotein 39) ; chitinase 3 like 1; Chitinase 3 like protein 1 precursor ; chitinase; Chitinase-3-like protein 1; Chondrocyte protein YKL40; GP 39; GP-39; GP39; HC gp39 ; HCGP 3P ; hCGP-39; HCgp39; YKL 40; YKL-40; YKL40; YYL 40
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

Carbohydrate-binding lectin with a preference for chitin. Has no chitinase activity. May play a role in tissue remodeling and in the capacity of cells to respond to and cope with changes in their environment. Plays a role in T-helper cell type 2 (Th2) inflammatory response and IL-13-induced inflammation, regulating allergen sensitization, inflammatory cell apoptosis, dendritic cell accumulation and M2 macrophage differentiation. Facilitates invasion of pathogenic enteric bacteria into colonic mucosa and lymphoid organs. Mediates activation of AKT1 signaling pathway and subsequent IL8 production in colonic epithelial cells. Regulates antibacterial responses in lung by contributing to macrophage bacterial killing, controlling bacterial dissemination and augmenting host tolerance. Also regulates hyperoxia-induced injury, inflammation and epithelial apoptosis in lung.
Gene References into Functions
  1. YKL-40 elevation significantly improved risk prediction for all-cause and cardiovascular mortality in hemodialysis patients. PMID: 28941940
  2. Polymorphisms of the CHI3L1 gene (rs4950928 C>G and rs10399931 C>T) are associated with the risk and prognosis of AD and can affect the expression of CHI3L1 in plasma. PMID: 30223258
  3. High YKL-40 expression is associated with endothelial cell angiogenesis in breast cancer. PMID: 29274508
  4. Pretreatment serum levels of YKL-40 may be a novel prognostic factor of overall and disease-free survival in patients with nonmetastatic colorectal cancer PMID: 29642772
  5. Plasma YKL-40 distinguishes between patients with features of asthma-chronic obstructive pulmonary disorder (COPD) overlap (ACO) and COPD patients. PMID: 29580282
  6. CHI3L1 expression is a novel biomarker for the prognosis of gastric cancer and these findings have thus identified CHI3L1/CD44 axis as a vital pathway and potential therapeutic target in gastric cancer PMID: 30165890
  7. YKL-40 was highly elevated in patients with ESRD on HD, and dialysis reduced serum YKL-40 concentrations approximately one-sixth. YKL-40 measured after dialysis was independently associated with mortality in HD patients. PMID: 29357700
  8. Review/Meta-analysis: YKL-40 may be implicated in bronchial inflammation and remodeling in COPD and may be considered as a useful biomarker for COPD diagnosis and monitoring. PMID: 29430175
  9. YKL-40 is a glycoprotein - a potential marker for active inflammatory process - with proven predictive value in a number of diseases that evolve with inflammation, remodeling of the extracellular matrix, or development of fibrosis. PMID: 29400369
  10. TMEM219 plays a critical role in Chi3l1-induced IL-13Ralpha2 mediated signalling and tissue responses. PMID: 27629921
  11. Our present data reveal the crucial role of CHI3L1 in the formation of vasculogenic mimicry, which may contribute to tumour aggressiveness of cervical cancer PMID: 29452694
  12. there was a negative correlation between YKL-40 and TLR4 expression in chronic sinusitis patients with nasal polyps. YKL-40 and TLR4 interacted with each other to activate NF-kappaB and promote disease progression. PMID: 29921378
  13. CHI3L1 may be a previously unrecognized biomarker for diagnosing Gaucher Diseases (GD) and for evaluating the therapeutic effects of new GD drug. PMID: 29396296
  14. Study established a connection between the pretreated CHI3L1 and patients with esophageal squamous cell carcinoma (ESCC), and the serum CHI3L1 was primarily secreted by ESCC-surrounded macrophages. PMID: 29209110
  15. YKL-40 is expressed in cutaneous Squamous Cell Skin Cancer PMID: 30061245
  16. The G allele of CHI3L1 rs4950928 might be a protective factor against the development of asthma. PMID: 29233108
  17. This study suggests that CHI3L1 and CHI3L2 are associated with the progression of neurodegeneration in motor cortex and spinal cord of Amyotrophic Lateral Sclerosis patients. PMID: 28989002
  18. in neurodegenerative dementias, YKL-40 is a disease-specific marker of neuroinflammation showing its highest levels in prion diseases PMID: 29126445
  19. Serum IL-6, serum YKL-40, and plasma VEGF were significantly correlated with disease activity at baseline in early rheumatoid arthritis. PMID: 29336711
  20. high serum YKL-40 levels correlated with the severity of obstructive sleep apnea syndrome and might serve as a nonspecific biomarker for prediction and progression of the disease. PMID: 29028081
  21. YKL-40 could be considered as a useful biomarker of inflammation in psoriasis and is more sensitive than CRP or WBC. Increased YKL-40 may indicate psoriatic patients with a higher level of systemic inflammation, which may determine disease management. PMID: 28932021
  22. YKL-40 protein expression associated with severe lung function impairment and severe exacerbations in Asthma patients. PMID: 29025889
  23. Results suggest a potential role of chitinase 3 like 1 protein (CHI3L1) in angiogenesis in invasive ductal breast carcinoma (IDC) and may suggest its involvement in cancer progression. PMID: 29848684
  24. YKL-40 is a promising biomarker for evaluating polymyositis/dermatomyositis-associated interstitial lung disease activity/severity and predicting disease prognosis. PMID: 28711881
  25. Early-onset atopic dermatitis was associated with rs2303067 in SPINK5, which is involved in skin barrier functioning, and late-onset was associated with rs4950928 in CHI3L1, which is involved in the immune response. Future studies should examine the early- versus late-onset subgrouping more closely. PMID: 28681574
  26. YKL-40 may represent a novel biomarker for predicting hypertension risk in prehypertension population PMID: 28797750
  27. A high diagnostic sensitivity of YKL-40 in the early stages of the disease suggests the possibility of using this biomarker at an early diagnostic phase of patients with endometrial cancer. The patients with increased levels of YKL-40 before treatment are also at the higher risk of relapse. PMID: 28624692
  28. Serum YKL-40 was elevated only in atrial fibrllation and not in other supraventricular arrhythmias. PMID: 28639986
  29. YKL-40 is elevated in serum and bronchoalveolar lavage fluid of pulmonary alveolar proteinosis (PAP) patients, and may be of clinical utility to predict outcome in PAP PMID: 28569052
  30. strongly expressed in placenta percreta and correlated with extravillous trophoblast invasion PMID: 27977409
  31. YKL-40 was expressed by macrophages in liver tissue of NAFLD patients. PMID: 27739482
  32. The results of this study indicate that YKL-40 may contribute to decreased stability and increased permeability of BBB in AD patients PMID: 28697565
  33. YKL-40 is expressed by a subset of astrocytes in Alzheimer's disease and other tauopathies. PMID: 28599675
  34. This study has shown that YKL-40 serum level is increased in patients with atopic dermatitis and reflects the severity of symptoms. PMID: 28660216
  35. YKL-40 levels were found to be significantly higher in post-infectious bronchiolitis obliterans (PIBO) patients with exacerbation compared with that in bronchiolitis patients and showed a positive correlation with the severity of disease before diagnosis of PIBO. PMID: 28567534
  36. miR-24 serves as a molecular regulator in S. aureus-induced macrophage polarization through targeting of CHI3L1 and regulation of the MAPK pathway PMID: 28303416
  37. High YKL-40 expression is independently and markedly associated with worse overall survival in glioblastoma patients. PMID: 27090900
  38. Datashow that patients with YKL-40 overexpression had significantly shorter survival time than those with low YKL-40 expression. PMID: 28099248
  39. The level of serum YKL-40 is a significant and independent biomarker to predict the clinical outcome in large-artery atherosclerotic stroke. PMID: 27650381
  40. TrkB-containing exosomes play a key role in the control of glioblastoma progression and aggressiveness, as seen in a model of YKL-40-inactivated glioblastoma cells PMID: 27385098
  41. findings suggest that these pulmonary markers could be useful to assess CAP severity and, especially YKL-40 and CCL18 by helping predict CAP caused by atypical pathogens PMID: 29324810
  42. The present meta-analysis indicate that elevated YKL-40 expression is associated with a poor prognosis in breast cancer patients. YKL-40 may serve as a promising predictive biomarker of prognosis of breast cancer PMID: 28036271
  43. YKL-40 induces IL-18 production in osteoblasts and thereby stimulates angiogenesis of endothelial progenitor cells through the suppression of miR-590-3p via the focal adhesion kinase (FAK)/PI3K/Akt signaling pathway. PMID: 28448439
  44. YKL-40 levels showed a positive correlation with blood neutrophil counts but no consistent relationships with clinical characteristics of relevance to continuous wheeze in preschool children PMID: 27732738
  45. Study suggests that YKL-40 is associated with hypertension incidence only among men. PMID: 27815265
  46. In HCT donors with YKL-40 plasma concentrations, a trend toward increased grade II-IV acute GvHD in recipients was observed with no significant associations with overall survival, treatment-related mortality or relapse PMID: 27427920
  47. Review of evidence for the role of YKL-40 in the diagnosis, prognosis and cause of cardiovascular and alcoholic liver disease. PMID: 27187575
  48. the level of CHI3L1 protein in the sera of patients with gastric or breast cancer was significantly elevated compared with those of healthy donors. M2 macrophage-secreted CHI3L1 promoted the metastasis of gastric and breast cancer cells in vitro and in vivo PMID: 28143526
  49. Besides being associated with tau pathology, CSF YKL-40 adds to the growing array of biomarkers reflecting distinct molecular brain mechanisms potentially useful for stratifying individuals for biomarker-guided, targeted anti-inflammatory therapies emerging from precision medicine. PMID: 28281838
  50. SNPs in CHI3L1 and cord blood YKL-40 were not associated with lung function measurements at 5 weeks and 6 years, respiratory symptoms in the first year, and allergic sensitisation at 6 years. Genetic variation in CHI3L1 might be related to the development of milder forms of asthma. PMID: 27193312

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Involvement in disease
Asthma-related traits 7 (ASRT7); Schizophrenia (SCZD)
Subcellular Location
Secreted, extracellular space. Cytoplasm. Cytoplasm, perinuclear region. Endoplasmic reticulum.
Protein Families
Glycosyl hydrolase 18 family
Tissue Specificity
Present in activated macrophages, articular chondrocytes, synovial cells as well as in liver. Very low or undetectable expression in non-inflammatory colon. Undetectable in muscle tissues, lung, pancreas, mononuclear cells, or fibroblasts.
Database Links

HGNC: 1932

OMIM: 181500

KEGG: hsa:1116

STRING: 9606.ENSP00000255409

UniGene: Hs.382202

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