Recombinant Human Receptor-type tyrosine-protein kinase FLT3 (FLT3), partial

Code CSB-YP008733HU
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Source Yeast
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Code CSB-EP008733HU
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Source E.coli
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Code CSB-EP008733HU-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-BP008733HU
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Source Baculovirus
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Code CSB-MP008733HU
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Source Mammalian cell
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Product Details

>85% (SDS-PAGE)
Target Names
Uniprot No.
Alternative Names
CD 135; CD135; CD135 antigen; Fetal liver kinase 2; FL cytokine receptor; Flk 2; Flk2; Flt 3; FLT-3; Flt3; FLT3_HUMAN; FMS like tyrosine kinase 3; Fms related tyrosine kinase 3; Fms-like tyrosine kinase 3; Growth factor receptor tyrosine kinase type III; Ly-72; OTTHUMP0000004234; Receptor type tyrosine protein kinase FLT3; Stem cell tyrosine kinase 1; Stk 1; STK-1; Stk1; Tyrosine protein kinase receptor FLT3; Tyrosine-protein kinase receptor FLT3
Homo sapiens (Human)
Protein Length
Tag Info
The following tags are available.
N-terminal His-tagged
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

Tyrosine-protein kinase that acts as cell-surface receptor for the cytokine FLT3LG and regulates differentiation, proliferation and survival of hematopoietic progenitor cells and of dendritic cells. Promotes phosphorylation of SHC1 and AKT1, and activation of the downstream effector MTOR. Promotes activation of RAS signaling and phosphorylation of downstream kinases, including MAPK1/ERK2 and/or MAPK3/ERK1. Promotes phosphorylation of FES, FER, PTPN6/SHP, PTPN11/SHP-2, PLCG1, and STAT5A and/or STAT5B. Activation of wild-type FLT3 causes only marginal activation of STAT5A or STAT5B. Mutations that cause constitutive kinase activity promote cell proliferation and resistance to apoptosis via the activation of multiple signaling pathways.
Gene References into Functions
  1. Multivariate Cox's proportional hazards regression analyses revealed that OCT4 mRNA high expression was an independent predictive factor for shorter EFS and OS in AML patients. Conclusion OCT4 correlates with presence of CK, FLT3-ITD mutation and poorer risk stratification, and it could be served as a convincing biomarker for predicting unfavourable prognosis in AML patients. PMID: 29950146
  2. Results indicate that DNMT3A mutations alone do not affect the clinical outcomes of AML patients undergoing allogeneic HSCT, but when accompanied by FLT3-ITD mutations, the OS was significantly reduced (5-year OS 0% for DNMT3A R882mut/FLT3-ITDpos patients vs. 62% DNMT3A R882wt/FLT3-ITDneg, p=0.025) and the relapse rate increased. PMID: 29786546
  3. RIPK3-dependent cell death and inflammasome activation in FLT3-internal-tandem-duplication-expressing leukemia-initiating cells PMID: 27517160
  4. The results suggested that FLT3 ITD mutations could become an indicator of poor prognosis of APL, and these patients should receive more intensive therapy according to current guidelines. PMID: 29251252
  5. Low FLT3 expression is associated with Pancreatic ductal adenocarcinoma. PMID: 30275197
  6. DNMT3A R882 mutation plays an important role in CN-AML patients' prognosis and clinical outcomes in the presence and absence of NPM1 and FLT3 mutations. PMID: 29079128
  7. the FLT3 inhibitor AC220 inhibited glutamine flux into the antioxidant factor glutathione profoundly due to defective glutamine import. PMID: 28947392
  8. Mutation in FLT3 gene is associated with Acute Myeloid Leukemia. PMID: 29530994
  9. Acute myeloid leukemia harboring internal tandem duplication of FMS-like tyrosine kinase 3 (AML(FLT3-ITD)) is associated with poor prognosis. PMID: 29330746
  10. Impact of FLT3-ITD diversity on response to induction chemotherapy in patients with acute myeloid leukemia has been described. PMID: 28034991
  11. The results of the present study showed that the overexpression of FLT3 is a potential risk factor in leukemia. PMID: 29257272
  12. In this study, FLT3 and NPM1 mutations were evaluated in adult Iranian patients with de novo cytogenetically normal acute myeloid leukemia and its correlations with clinical and laboratory parameters were also assessed. PMID: 28294102
  13. FLT3 and FLT3-ITD can directly bind and selectively phosphorylate p27kip1 on tyrosine residue 88 in acute myeloid leukemia. Inhibition of FLT3-ITD in cell lines strongly reduced p27 tyrosine 88 phosphorylation and resulted in increased p27 levels and cell cycle arrest PMID: 28522571
  14. study showed that FLT3 can be targeted by FLT3-CAR T cells for the treatment FLT3(+) AML. FLT3-CAR T cells may provide a new immunotherapeutic approach for AML patients PMID: 28496177
  15. The high expressions of BCRP mRNA calculated with Pfaffl's rule and FLT3-ITD are independent poor risk factors in adult patients with AML and intermediate or normal karyotype. PMID: 28618074
  16. The new and recurrent FLT3 juxtamembrane deletion mutation shows a dominant negative effect on the wild-type FLT3 receptor. PMID: 27346558
  17. FLT3 cell-surface expression did not vary by FLT3 mutational status, but high FLT3 expression was strongly associated with KMT2A rearrangements. Our study found that there was no prognostic significance of FLT3 cell surface expression in pediatric Acute Myeloid Leukemia PMID: 28108543
  18. DNA mutational analysis in FLT3 in acute myeloid leukemia. PMID: 27071442
  19. data confirm MLL-PTD and, to a lesser extent, FLT3-ITD as common events in +11 AML.6, 7, 8 However, the high mutation frequencies of U2AF1 and genes involved in methylation (DNMT3A, IDH2) have hitherto not been reported in +11 AML PMID: 27435003
  20. The cytokine Fms-like tyrosine kinase 3 ligand is an important regulator of hematopoiesis. Its receptor, Flt3, is expressed on myeloid, lymphoid and dendritic cell progenitors and is considered an important growth and differentiation factor for several hematopoietic lineages. [review] PMID: 28538663
  21. FLT3 amplification in solid cancers is infrequently observed using targeted genomic profile, as yet, FLT3 amplification does not seem to be an actionable target or a proper biomarker for FLT3 inhibitor sensitivity. PMID: 27906677
  22. FLT3 has a role in cytarabine transport by SLC29A1 in pediatric acute leukemia PMID: 27391351
  23. Data indicate a pathway MYSM1/miR-150/FLT3 that inhibits proliferation of B1a cells, which may be involved in the pathogenesis of systemic lupus erythematosus (SLE). PMID: 27590507
  24. findings confirm that FLT3-ITD-location influences disease biology and leads to changes in global gene expression. In our model, ITD-location alters proliferative capacity and sensitivity to FLT3-TKI-treatment in vivo PMID: 26487272
  25. a decision analysis comparing allo-HCT vs chemotherapy in first complete remission for patients with cytogenetically intermediate-risk acute myeloid leukemia, depending on the presence or absence of FLT3-ITD), NPM1, and CEBPA mutations showed that allo-HCT was a favored postremission strategy in patients with FLT3-ITD, and chemotherapy was favored in patients with biallelic CEBPA mutations. PMID: 27040395
  26. ATM/G6PD-driven redox metabolism promotes FLT3 inhibitor resistance in acute myeloid leukemia that can be successfully reversed. PMID: 27791036
  27. Data suggest that there is a place for escalated daunorubicin dosing for fms-like tyrosine kinase 3 (FLT3)-ITD mutated cases. PMID: 27268085
  28. Integrin alphavbeta3 has a role in enhancing beta-catenin signaling in acute myeloid leukemia harboring Fms-like tyrosine kinase-3 internal tandem duplication mutations PMID: 27248172
  29. Review of the role of the most common form of FMS-like tyrosine kinase 3 (FLT3) mutation (internal tandem duplication) in acute myeloid leukemia. PMID: 28470536
  30. the present cohort study demonstrated that FLT3-ITD and DNMT3A R882 double mutation predicts poor prognosis in Chinese AML patients receiving chemotherapy or allo-HSCT treatment. PMID: 28616699
  31. Although transient responses to FLT3 inhibitors are often observed in case of disease relapse, the most promising approach is the use of FLT3 inhibitors either in combination with induction chemotherapy or as consolidation/maintenance therapy after allogeneic hematopoietic cell transplantation. PMID: 27775694
  32. In this review, we focus on three key areas in acute myeloid leukemia (AML) developmental therapeutics: FLT3 inhibitors, IDH(IDH1 and IDH2 ) inhibitors, and drugs that may be particularly beneficial in secondary AML PMID: 28561688
  33. Concomitant monitoring of WT1 and FLT3-ITD expression in FLT3-ITD acute myeloid leukemia patients PMID: 28211167
  34. FLT3/ITD are present at leukemic stem cells level and may be a primary and not secondary event in leukemogenesis, and the oncogenic events of FLT3/ITD happen at a cell stage possessing CD123 PMID: 27465508
  35. Sorafenib may enable cure of a proportion of very poor risk FLT3-internal tandem duplication-positive acute emyeloid leukemia relapsing after allogeneic stem cell transplantation. PMID: 29055209
  36. Results provide evidence that mutations in the tyrosine kinase domain in FLT3 were found in 7% of Pakistani patients with acute myeloid leukemia. PMID: 27735988
  37. FLT3/ITD increases aerobic glycolysis through AKT-mediated upregulation of mitochondrial hexokinase (HK2). Inhibition of glycolysis preferentially causes severe ATP depletion and massive cell death in FLT3/ITD leukemia cells. PMID: 28194038
  38. Our results indicate that CD4 expression and older age are adverse prognostic factors in wild-type NPM1, FLT3-ITD-negative CN-AML. PMID: 28318150
  39. FLT3 mutation is associated with Metaplastic Breast Cancer. PMID: 27568101
  40. Collectively, we have developed a novel targeted therapeutic strategy, using FLT3L-guided miR-150-based nanoparticles, to treat FLT3-overexpressing AML with high efficacy and minimal side effects. PMID: 27280396
  41. Y842 is critical for FLT3-mediated RAS/ERK signaling and cellular transformation. PMID: 28271164
  42. value of FLT3-ITD allelic ratio in AML in risk assessment and evaluating prognosis PMID: 27416910
  43. DOCK2 is a potential therapeutic target for novel AML treatments, as this protein regulates the survival of leukemia cells with elevated FLT3 activity and sensitizes FLT3/ITD leukemic cells to conventional antileukemic agents. PMID: 27748370
  44. Gedatolisib significantly extended survival of mice in a sorafenib-resistant acute myeloid leukemia (AML) patient-derived xenograft model. Taken together, our data suggest that aberrant activation of the PI3K/mTOR pathway in FLT3-ITD-dependent AML results in resistance to drugs targeting FLT3. PMID: 26999641
  45. HHEX could replace RUNX1 in cooperating with FLT3-ITD to induce Acute myeloid leukemia (AML). PMID: 28213513
  46. mutated FLT3-ITD and JAK2 augment reactive oxygen species production and homologous recombination, shifting the cellular milieu toward illegitimate recombination. PMID: 28108507
  47. these data reveal a novel mechanism which regulates acute myeloid leukemia cell death by ceramide-dependent mitophagy in response to FLT3-ITD targeting. PMID: 27540013
  48. MSI2 and FLT3 are significantly co-regulated in human AML PMID: 28107692
  49. Sorafenib-resistant leukemia cells with a FLT3/ITD mutation are sensitive to glycolytic inhibitors. PMID: 27132990
  50. Factors that did not influence the relapse risk included: age, graft type, graft source, type of FLT3 mutation, or conditioning intensity PMID: 28052408

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Involvement in disease
Leukemia, acute myelogenous (AML)
Subcellular Location
Membrane; Single-pass type I membrane protein. Endoplasmic reticulum lumen. Note=Constitutively activated mutant forms with internal tandem duplications are less efficiently transported to the cell surface and a significant proportion is retained in an immature form in the endoplasmic reticulum lumen. The activated kinase is rapidly targeted for degradation.
Protein Families
Protein kinase superfamily, Tyr protein kinase family, CSF-1/PDGF receptor subfamily
Tissue Specificity
Detected in bone marrow, in hematopoietic stem cells, in myeloid progenitor cells and in granulocyte/macrophage progenitor cells (at protein level). Detected in bone marrow, liver, thymus, spleen and lymph node, and at low levels in kidney and pancreas. H
Database Links

HGNC: 3765

OMIM: 136351

KEGG: hsa:2322

STRING: 9606.ENSP00000241453

UniGene: Hs.507590

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