Recombinant Human Galectin-9 (LGALS9) Protein (His)

Name: Recombinant Human Galectin-9 (LGALS9) Protein (His)
Brand: Beta LifeScience
SKU: BLC-09529P
Availability: InStock

Greater than 90% as determined by SDS-PAGE.

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Product Overview

Description	Recombinant Human Galectin-9 (LGALS9) Protein (His) is produced by our Yeast expression system. This is a full length protein.
Purity	Greater than 90% as determined by SDS-PAGE.
Uniprotkb	O00182
Target Symbol	LGALS9
Synonyms	36 kDa beta-galactoside-binding lectin; Ecalectin; Gal-9; galectin 9; Galectin-9; galectin9; HOM HD 21; HOMHD21; HUAT; Lectin galactoside binding soluble 9; LEG9_HUMAN; LGAL S9; LGALS 9; Lgals9; LGALS9A; MGC117375; MGC125973; MGC125974; Tumor antigen HOM-HD-21; UAT; Urate transporter/channel; Urate transporter/channel protein
Species	Homo sapiens (Human)
Expression System	Yeast
Tag	N-6His
Target Protein Sequence	MAFSGSQAPYLSPAVPFSGTIQGGLQDGLQITVNGTVLSSSGTRFAVNFQTGFSGNDIAFHFNPRFEDGGYVVCNTRQNGSWGPEERKTHMPFQKGMPFDLCFLVQSSDFKVMVNGILFVQYFHRVPFHRVDTISVNGSVQLSYISFQPPGVWPANPAPITQTVIHTVQSAPGQMFSTPAIPPMMYPHPAYPMPFITTILGGLYPSKSILLSGTVLPSAQRFHINLCSGNHIAFHLNPRFDENAVVRNTQIDNSWGSEERSLPRKMPFVRGQSFSVWILCEAHCLKVAVDGQHLFEYYHRLRNLPTINRLEVGGDIQLTHVQT
Expression Range	1-323aa
Protein Length	Full Length of Isoform 2
Mol. Weight	37.7kDa
Research Area	Cell Biology
Form	Liquid or Lyophilized powder
Buffer	Liquid form: default storage buffer is Tris/PBS-based buffer, 5%-50% glycerol. Lyophilized powder form: the buffer before lyophilization is Tris/PBS-based buffer, 6% Trehalose, pH 8.0.
Reconstitution	Briefly centrifuged the vial prior to opening to bring the contents to the bottom. Reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL. It is recommended to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20°C/-80°C. The default final concentration of glycerol is 50%.
Storage	1. Store at -20°C/-80°C upon receipt, aliquoting is necessary for mutiple use. 2. Avoid repeated freeze-thaw cycles. 3. Store working aliquots at 4°C for up to one week. 4. In general, protein in liquid form is stable for up to 6 months at -20°C/-80°C. Protein in lyophilized powder form is stable for up to 12 months at -20°C/-80°C.
Notes	Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.

Target Details

Target Function	Binds galactosides. Has high affinity for the Forssman pentasaccharide. Ligand for HAVCR2/TIM3. Binding to HAVCR2 induces T-helper type 1 lymphocyte (Th1) death. Also stimulates bactericidal activity in infected macrophages by causing macrophage activation and IL1B secretion which restricts intracellular bacterial growth. Ligand for P4HB; the interaction retains P4HB at the cell surface of Th2 T-helper cells, increasing disulfide reductase activity at the plasma membrane, altering the plasma membrane redox state and enhancing cell migration. Ligand for CD44; the interaction enhances binding of SMAD3 to the FOXP3 promoter, leading to up-regulation of FOXP3 expression and increased induced regulatory T (iTreg) cell stability and suppressive function. Promotes ability of mesenchymal stromal cells to suppress T-cell proliferation. Expands regulatory T-cells and induces cytotoxic T-cell apoptosis following virus infection. Activates ERK1/2 phosphorylation inducing cytokine (IL-6, IL-8, IL-12) and chemokine (CCL2) production in mast and dendritic cells. Inhibits degranulation and induces apoptosis of mast cells. Induces maturation and migration of dendritic cells. Inhibits natural killer (NK) cell function. Can transform NK cell phenotype from peripheral to decidual during pregnancy. Astrocyte derived galectin-9 enhances microglial TNF production. May play a role in thymocyte-epithelial interactions relevant to the biology of the thymus. May provide the molecular basis for urate flux across cell membranes, allowing urate that is formed during purine metabolism to efflux from cells and serving as an electrogenic transporter that plays an important role in renal and gastrointestinal urate excretion. Highly selective to the anion urate.; Acts as an eosinophil chemoattractant. It also inhibits angiogenesis. Suppresses IFNG production by natural killer cells.
Subcellular Location	Cytoplasm. Nucleus. Secreted.; [Isoform 2]: Secreted.; [Isoform 3]: Secreted.
Database References	HGNC: 6570 OMIM: 601879 KEGG: hsa:3965 STRING: 9606.ENSP00000378856 UniGene: PMID: 30120234 High GAL9 expression is associated with gastric cancer. PMID: 30106451 Gal-9 is a promising biomarker for allograft dysfunction, but unable to differentiate allograft rejection from other causes of renal dysfunction in kidney transplantation recipients PMID: 29310109 this study showed that blood level of galectin-9 increased during pregnancy PMID: 29205636 Gal-9 expression determined the DFS and OS of ovarian cancer patients in two opposing ways-moderate Gal-9 expression was correlated with a reduced outcome as compared to Gal-9 negative cases, while patients with high Gal-9 expression showed the best outcome. PMID: 29361803 these data indicate a novel role for galectin-9 in modulating innate immunity by inducing aldehyde dehydrogenase activity in CD103+ dendritic cells PMID: 28889122 Gal-9 was down modulated in stroma of patients with chronic gastritis and Helicobacter pylori infection. PMID: 28939284 T-cell immunoglobulin mucin-3/galectin-9 (Tim-3/Gal-9) binding signaling can also engage other binding partners to induce distinct cellular responses [Review]. PMID: 29027155 the present study was the first to report the participation of Gal-9 in Chagas disease PMID: 28554765 The interaction between Gal-9/TIM-3 pathway and follicular helper cells contributed to viral persistent in chronic hepatitis C virus infection. PMID: 28772217 Our data reveal that Gal9 suppresses the growth of liver metastasis, possibly by inducing apoptosis through a mechanism involving mitochondria and changes in miRNA expression. Thus, Gal9 might serve as a therapeutic agent for the treatment of liver metastasis from pancreatic cancer. PMID: 28656219 Exosomal total protein, Tim-3 and Galectin-9 were up-regulated in non-small cell lung cancer plasma. PMID: 29452091 Galectin-9, a soluble lectin expressed by T cells, endothelial cells and dendritic cells, binds to and retains PDI on the cell surface. PMID: 28810662 results suggested that Tim-3 and Gal-9 could downregulate T cell inflammation in Osteoarthritis PMID: 28393295 Results show that human acute myeloid leukemia (AML) cells possess a secretory pathway which leads to the production and release of soluble Tim-3 and galectin-9. Both proteins prevent the activation of NK cells and impair their AML cell-killing activity. PMID: 28750861 Significantly elevated Gal-9 levels were found in both minimal-mild (I-II) and moderate-severe (III-IV) stages of endometriosis in comparison with healthy controls. PMID: 29202955 We investigated tumor-infiltrating CD4 and CD8 T cells and the expression of PD-L1, Galectin-9, and XAGE1 in stage I to IIIA lung adenocarcinomas using a tissue microarray to deduce their contribution to overall survival, and our data showed that PD-L1 expression was a positive indicator, whereas Galectin-9 and XAGE1 expression was negative. PMID: 27799141 Tim3/Gal-9 alleviates the inflammation of TAO patients via suppressing Akt/NF-kappaB signaling pathway. PMID: 28756232 Low Gal-9 expression is associated with pancreatic and ampullary cancer. PMID: 28470686 Galectin 9 is a novel dectin 1 ligand in pancreatic ductal adenocarcinoma. Upon disruption of the dectin 1-galectin 9 axis, CD4(+) and CD8(+) T cells, which are dispensable for PDA progression in hosts with an intact signaling axis, become reprogrammed into indispensable mediators of anti-tumor immunity. PMID: 28394331 X-ray structure of a protease-resistant mutant form of human galectin-9 having two carbohydrate recognition domains with a metal-binding site has been presented. PMID: 28687490 These findings may indicate that an increase in the Gal-9 level, a novel immune checkpoint molecule, can reflect immune-related adverse effects of various biotherapies. PMID: 28321034 Our data suggest a role of galectin-9 in regulating HIV transcription and viral production in vivo during therapy PMID: 27253379 these data suggest that the high Tim-3 expression in monocytes could be utilized by tumor-promoting Gal-9 expression on CD4(+) T cells PMID: 28466780 this study shows that in osteosarcoma patients, Tim3 expression did not directly mediate immune suppression, but the interaction between Tim3+ T cells and monocytes, naive CD4+ T cells, and Gal9-expressing CD4+ CD25+ Tregs could resulting in progressive suppression of Th1 responses PMID: 28103502 The human recombinant galectin-9 has demonstrated anti-cancer activities, including inducing apoptosis in hematological, dermatological and gastrointestinal malignancies. In this review, the molecular characteristics, history and apoptosis-inducing potential of galectin-9 are described. [review] PMID: 28045432 In this review, we summarize the latest knowledge on the structure, receptors, cellular targets, trafficking pathways and functional properties of galectin-9 and discuss how galectin-9-mediated signalling cascades can be exploited in cancers and immunotherapies PMID: 27581941 this study shows that the levels of expression of Gal-9 on CD4+ T cells, CD8+ T cells, CD56+ T cells and in serum in patients with systemic lupus erythematosus are significantly higher than those of healthy controls PMID: 27394439 In a genetic analysis of heavy consumers of alcohol, the authors associated 2 single-nucleotide polymorphisms in LGALS9 with the development of advanced alcoholic liver disease. PMID: 26598225 The integrative analysis of galectins(Gal-1, -3, -4, -9) discriminated IBD from other intestinal inflammatory conditions and could be used as potential mucosal biomarker. PMID: 26891020 Gal-9 suppresses the growth of GBC, possibly by inducing apoptosis and altering miRNA expression PMID: 26797414 The expression of Galectin-9 mRNA has a close relationship with pathological differentiation, tumor staging, and recurrence metastasis in hepatocellular carcinoma PMID: 26823850 The Gal-9/Tim-3 signal is important for the regulation of decidua NK cells function, which is beneficial for the maintenance of a normal pregnancy. PMID: 25578313 Gal-9 suppressed T-helper 17 (Th17) and expanded regulatory T cells (Tregs), resulting in decreased IL-17 production and increased secretion of TGF-beta1 PMID: 26663989 an abnormal Tim-3/Gal-9 pathway was able to facilitate the development of preeclampsia. PMID: 26342682 Galectin-9 stimulated migration in human NK-92 cells by affecting F-actin polarization through the Rho/ROCK1 signaling pathway. PMID: 27028892 may contribute to elevated galectin-9 and adaptive immune inhibition in hepatitis C virus infection PMID: 26475932 TIM-3 and its ligand, galectin-9 (Gal-9), constitute an autocrine loop critical for leukemic stem cells self-renewal and development of human acute myeloid leukemia. PMID: 26279267 Galectin-9 is involved in the pathogenesis of autoimmune thyroid disease.Graves' disease is associated with a defective expression of the immune regulatory molecule galectin-9 in antigen-presenting dendritic cells. PMID: 25880730 Study found that LGALS9 was expressed in 68.4% of the human gastrointestinal stromal tumors (GIST) and Tim-3 in the infiltrated NK cells of 68.4% of GISTs and suggest that Tim-3/LGALS9 pathway may be involved in the immune checkpoint mechanism of GISTs. PMID: 26239720 We also observed that the Gal-9/miR-22 axis may influence lymphocyte apoptosis and tumor cell proliferation. These studies contribute to a further understanding of the microRNAmediated regulation of the Gal-9 pathway . PMID: 26239725 These results indicate the possibility that cooperative binding of oligosaccharide and neighboring polypeptide structures of monoclonal IgE to galectin-9 affects the overall affinity and specificity of the IgE-lectin interaction. PMID: 26582205 These findings suggest that Gal-9 can be a candidate of therapeutic target in the treatment of cholangiocarcinoma PMID: 26260906 the increased expression may be helpful to differentiate of oral squamous cell carcinoma from oral leukoplakia and oral lichen planus PMID: 25956455 Data show that dengue virus (DV) infection specifically increased mRNA and protein levels of galectin-9 (Gal-9). PMID: 25754930 Participation of TIM-3 and its ligand (galectin-9) in the pathogenesis of active generalized vitiligo PMID: 25784621 Results show that galectin-9 inhibited the growth of hepatocellular carcinoma (HCC) cells by apoptosis, but not cell cycle arrest. Its antitumor effect is mediated by miR1246. PMID: 25823465 Gal-9 expression is a potential independent prognostic factor for OS and RFS in patients with clear-cell renal cell carcinoma PMID: 25716202 Tim-3, which specifically expresses on LSCs, is beneficial for LSCs survival and AML progression by promoting expansion of MDSCs and differentiating into TAMs at the leukemia site PMID: 24639110 Gal-9 as a novel component of the first wave of the cytokine storm in acute HIV infection that is sustained at elevated levels in virally suppressed subjects PMID: 24786365

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Proteins are sensitive to heat, and freeze-drying can preserve the activity of the majority of proteins. It improves protein stability, extends storage time, and reduces shipping costs. However, freeze-drying can also lead to the loss of the active portion of the protein and cause aggregation and denaturation issues. Nonetheless, these adverse effects can be minimized by incorporating protective agents such as stabilizers, additives, and excipients, and by carefully controlling various lyophilization conditions.

Commonly used protectant include saccharides, polyols, polymers, surfactants, some proteins and amino acids etc. We usually add 8% (mass ratio by volume) of trehalose and mannitol as lyoprotectant. Trehalose can significantly prevent the alter of the protein secondary structure, the extension and aggregation of proteins during freeze-drying process; mannitol is also a universal applied protectant and fillers, which can reduce the aggregation of certain proteins after lyophilization.

Our protein products do not contain carrier protein or other additives (such as bovine serum albumin (BSA), human serum albumin (HSA) and sucrose, etc., and when lyophilized with the solution with the lowest salt content, they often cannot form A white grid structure, but a small amount of protein is deposited in the tube during the freeze-drying process, forming a thin or invisible transparent protein layer.

Reminder: Before opening the tube cap, we recommend that you quickly centrifuge for 20-30 seconds in a small centrifuge, so that the protein attached to the tube cap or the tube wall can be aggregated at the bottom of the tube. Our quality control procedures ensure that each tube contains the correct amount of protein, and although sometimes you can't see the protein powder, the amount of protein in the tube is still very precise.

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