Recombinant Human Tyrosine-protein kinase BTK (BTK)

Code CSB-YP002867HU
Size $276
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  • (Tris-Glycine gel) Discontinuous SDS-PAGE (reduced) with 5% enrichment gel and 15% separation gel.
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Product Details

Greater than 90% as determined by SDS-PAGE.
Target Names
Uniprot No.
Research Area
Alternative Names
Agammaglobulinaemia tyrosine kinase; AGMX 1; AGMX1; AT; ATK; B cell progenitor kinase; B-cell progenitor kinase; BPK; Bruton agammaglobulinemia tyrosine kinase; Bruton tyrosine kinase; Bruton鈥檚 Tyrosine Kinase; Btk; BTK_HUMAN; dominant-negative kinase-deficient Brutons tyrosine kinase; IMD 1; IMD1; MGC126261; MGC126262; OTTHUMP00000063593; PSCTK 1; PSCTK1; truncated Bruton agammaglobulinemia tyrosine kinase; Tyrosine protein kinase BTK; Tyrosine-protein kinase BTK; tyrosine-protein kinase BTK isoform (lacking exon 14; XLA
Homo sapiens (Human)
Expression Region
Target Protein Sequence
Note: The complete sequence including tag sequence, target protein sequence and linker sequence could be provided upon request.
Mol. Weight
Protein Length
Full Length of Mature Protein
Tag Info
N-terminal 6xHis-tagged
Liquid or 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.
Tris-based buffer,50% glycerol
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
Basically, we can dispatch the products out in 1-3 working days after receiving your orders. 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.
Datasheet & COA
Please contact us to get it.

Customer Reviews and Q&A

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Can you tell me if this product has imidazole present in the buffer?
And, just to confirm, it does have a his tag. Correct?
What is the purity?
Is there currently 100 ug from a single lot available?

Thanks for your inquiry
1. When separating and purifying the protein, we use imidazole for elution. We can remove the imidazole as much as possible by dialysis, but we can't guarantee that there is no residue at all.
If you care about imidazole, please remark this request when sending the PO and we will try to remove the imidazole by dialysis as much as possible.
2. Yes. This protein is with N-terminal 6xHis-tagged. There is no tag at C-terminus.
3. The purity will be greater than 90% as determined by SDS-PAGE.
4. At present, the stock is almost 0.15mg, plus the loss of dialysis, almost 100ug left. If the quality control is qualified, 5-10 working days. If not, we will re-prepare and it is 25-35 working days needed.
Any more questions, please feel free to contact us. Nice day.

Target Background

Non-receptor tyrosine kinase indispensable for B lymphocyte development, differentiation and signaling. Binding of antigen to the B-cell antigen receptor (BCR) triggers signaling that ultimately leads to B-cell activation. After BCR engagement and activation at the plasma membrane, phosphorylates PLCG2 at several sites, igniting the downstream signaling pathway through calcium mobilization, followed by activation of the protein kinase C (PKC) family members. PLCG2 phosphorylation is performed in close cooperation with the adapter protein B-cell linker protein BLNK. BTK acts as a platform to bring together a diverse array of signaling proteins and is implicated in cytokine receptor signaling pathways. Plays an important role in the function of immune cells of innate as well as adaptive immunity, as a component of the Toll-like receptors (TLR) pathway. The TLR pathway acts as a primary surveillance system for the detection of pathogens and are crucial to the activation of host defense. Especially, is a critical molecule in regulating TLR9 activation in splenic B-cells. Within the TLR pathway, induces tyrosine phosphorylation of TIRAP which leads to TIRAP degradation. BTK plays also a critical role in transcription regulation. Induces the activity of NF-kappa-B, which is involved in regulating the expression of hundreds of genes. BTK is involved on the signaling pathway linking TLR8 and TLR9 to NF-kappa-B. Transiently phosphorylates transcription factor GTF2I on tyrosine residues in response to BCR. GTF2I then translocates to the nucleus to bind regulatory enhancer elements to modulate gene expression. ARID3A and NFAT are other transcriptional target of BTK. BTK is required for the formation of functional ARID3A DNA-binding complexes. There is however no evidence that BTK itself binds directly to DNA. BTK has a dual role in the regulation of apoptosis.
Gene References into Functions
  1. Btk acts in the TLR7/8 pathway and mediates Ser-536 phosphorylation of p65 RelA and subsequent nuclear entry in primary human macrophages. PMID: 29567473
  2. Study shows that high BTK expression predicts poor outcome in patients with glioma. Its overexpression is required for EGFR-induced NF-kappaB activation. PMID: 28946903
  3. The Btk-dependent PIP5K1gamma lipid kinase activation by Fas counteracts FasL-induced cell death. PMID: 28879546
  4. Study utilized bone biopsies from patients with metastatic multiple myeloma and demonstrated that tyrosine phosphorylation by Bruton kinase may be a key disease event: Bruton kinase remained translocated to the membrane; upregulation of transcripts of several factors like activins A; increased expression of numerous cytokines that support osteolytic activity. PMID: 29480835
  5. BTK-inhibitor ibrutinib and FK866 resulted in a significant and synergistic anti-Waldenstrom macroglobulinemia cell death, regardless of MYD88 and CXCR4 mutational status. PMID: 27287071
  6. Strong synergism was observed with pimasertib combined with the PI3K inhibitor idelalisib and the BTK inhibitor ibrutinib in cell lines derived from diffuse large B-cell lymphoma (DLBCL) and mantle cell lymphoma. The data were confirmed in an in vivo experiment treating DLBCL xenografts with pimasertib and ibrutinib. PMID: 26961147
  7. these data show that BTK is a critical NLRP3 inflammasome regulator PMID: 28216434
  8. Resistant BTK mutants reconstituted B cell receptor-triggered chemokine secretion in the presence of corresponding inhibitors, demonstrating that BTK activity is connected with cell-intrinsic functions of malignant B cells with importance for their dialogue with the micro-environment. PMID: 28573668
  9. Bone marrow mesenchymal stem cells could increase myeloma stemness via activation of the BTK signal pathway. PMID: 28273548
  10. the results show that the interaction between BTK and ANKRD54 is highly selective, since it was also identified in a screen using human SH3-domainome. A novel finding is that BTK not only binds to ANKRD54, but stands out as the preferred interactor, being highly dominant over all other human SH3-domains. PMID: 28369144
  11. BTK, via p65BTK expression, is a novel and powerful oncogene acting downstream of the RAS/MAPK pathway and suggest that its targeting may be a promising therapeutic approach. PMID: 26804170
  12. We conclude that despite being involved in oncogenic signals in blood malignancies, BTK has antineoplastic properties in other contexts, such as the enhancement of p53's tumor suppressor responses PMID: 27630139
  13. Inhibition of Btk by inhalation of aerosolized RN983 may be effective as a stand-alone asthma therapy. PMID: 27111445
  14. LMP2A signaling results in STAT3 phosphorylation in B cells through a PI3K/BTK-dependent pathway. PMID: 27792904
  15. Case Report: Btk mutation responsible for X-Linked agammaglobulinemia manifesting as Pseudomonas aeruginosa liver abscess. PMID: 28398200
  16. this review describes contributions of BTK to immune tolerance, including studies testing BTK-inhibitors for treatment of autoimmune diseases PMID: 26864273
  17. The lack of BTK does not impair monocytes and polymorphonuclear cells functions in X-linked agammaglobulinemia under treatment with intravenous immunoglobulin. PMID: 28422989
  18. report that BTK is expressed by murine and human MDSCs, and that ibrutinib is able to inhibit BTK phosphorylation in these cells PMID: 26880800
  19. Novel BTK mutations have been described in a large cohort of North African patients with X-Linked agammagobulinemia. PMID: 26931785
  20. mutational analysis in cohort of Iranian patients with congenital agammaglobulinemia PMID: 26910880
  21. We report that BTK regulates B-cell and macrophage-mediated T-cell suppression in pancreas adenocarcinomas. PMID: 26715645
  22. Data show that Bruton tyrosine kinase (BTK)inhibitor Ibrutinib augments MALT lymphoma associated translocation protein (MALT1) inhibition by S-Mepazine in CD79 antigen mutant activated B cell-subtype (ABC) of diffuse large B cell lymphoma (DLBCL). PMID: 26540570
  23. BTK-C is a survival factor in prostate cancer cells. PMID: 26383180
  24. BTK RNA interference inhibits proliferation of FLT3-ITD acute myeloid leukemia cells. PMID: 26292723
  25. Activates PKC independent of BTK. PMID: 26089373
  26. study investigated all single-nucleotide substitution-caused amino acid variations in the kinase domain of Bruton tyrosine kinase; most disease-causing variations affect conserved and buried residues disturbing protein stability; sixty-seven percent of variations are predicted to be harmful PMID: 25777788
  27. Data show that Bruton tyrosine kinase (Btk) inhibitor PLS-123 suggested a new direction to pharmacologically modulate Btk function and develop novel therapeutic drug for B-cell lymphoma treatment. PMID: 25944695
  28. FcgammaRIIB requires Btk and p38 MAPK to mediate antigen-independent inhibition in human B cells. PMID: 26475492
  29. We found that chemoresistance was dependent on Btk and JAK2/STAT3, which maintained CSC by inducing Sox-2 and prosurvival genes. We suggest that addition of ibrutinib to cisplatin may improve treatment outcome in ovarian cancer. PMID: 26036311
  30. Letter: report BTK inhibitor ibrutinib induced panniculitis in lymphoid leukemia patients. PMID: 26182170
  31. study indicates that BTK is essential for NLRP3 inflammasome activation and could be a potent therapeutic target in ischaemic stroke PMID: 26059659
  32. Data indicate that the X linked agammaglobulinemia (XLA) diagnosis was confirmed for six patients with six different mutations. PMID: 26387629
  33. The immunoglobulin tail tyrosine motif in the cytoplasmic segments of membrane-bound IgGs acts as the principle signal amplifier by incorporating a Grb2-Btk signaling. PMID: 25413232
  34. Btk not only plays a fundamental role in the regulation of BCR signalling, but may also mediate crosstalk with cytokine signalling pathways through regulation of IL-21-induced phosphorylation of STAT1 in the nuclei of human B cells. PMID: 25724205
  35. The BTK missense mutation resulted in B cells with reduced BTK and high IgM expression. PMID: 25589397
  36. BTK is involved in determining proliferative, quiescent or metastatic phenotypes of myeloma cells. PMID: 25083818
  37. report of a case in a male with variant form of X-linked agammaglobulinemia (XLA) with partial B cell function that results from a missense mutation (c.1117C > G) in exon 13 of the BTK gene; four female carriers were found in the family PMID: 25316352
  38. miR-155 affects chemoimmunotherapy outcome and is modulated by Bruton's tyrosine kinase inhibition with Ibrutinib PMID: 25486872
  39. BTK is a positive regulator of myeloma stemness PMID: 25589346
  40. Cysteine 481 to serine BTK mutation confers ibrutinib resistance of chronic lymphocytic leukemia cells. PMID: 25189416
  41. FLT3-ITD and TLR9 use Bruton tyrosine kinase to activate distinct transcriptional programs mediating AML cell survival and proliferation PMID: 25605370
  42. Data indicate that dual inhibition of Brutons tyrosine kinase (BTK) and mTOR serine-threonine kinases as a potential treatment for ABC-subtype diffuse large B cell lymphoma. PMID: 24970801
  43. Docking and physicochemical studies indicated that BTK was involved in close contact with Tyr86 and Tyr106 of MAL, whereas PKCdelta may phosphorylate Tyr106 only. PMID: 24840642
  44. X-linked agammaglobulinemia is reported in two siblings with a novel mutation in the BTK gene. They presented with polyarticular juvenile idiopathic arthritis. PMID: 25757060
  45. Data indicate RN486 as potent and selective Bruton's tyrosine kinase (BTK) inhibitor and potential treatments for Rheumatoid arthritis. PMID: 24712864
  46. we report the pattern of expression of Btk in a large collection of different types of lymphoma. PMID: 25433814
  47. Data indicate that ibrutinib-resistant Bruton tyrosine kinase (BTK) mutation is one of the genetic causes of ibrutinib resistance in chronic lymphocytic leukemia (CLL). PMID: 25498455
  48. Unfolded protein response activation following surface immunoglobulin M stimulation in vitro is dependent on the activity of BTK and SYK. PMID: 25170122
  49. We observed that Nef interacts with the Tec family members Bmx, Btk, and Itk but not Tec or Txk. PMID: 24722985
  50. These results suggest that the function of BTK warrants further investigation, and BTK expression might be used as a prognostic indicator for patients with MM. PMID: 23581641

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Involvement in disease
X-linked agammaglobulinemia (XLA); X-linked hypogammaglobulinemia and isolated growth hormone deficiency (XLA-IGHD)
Subcellular Location
Cytoplasm. Cell membrane; Peripheral membrane protein. Nucleus. Note=In steady state, BTK is predominantly cytosolic. Following B-cell receptor (BCR) engagement by antigen, translocates to the plasma membrane through its PH domain. Plasma membrane localization is a critical step in the activation of BTK. A fraction of BTK also shuttles between the nucleus and the cytoplasm, and nuclear export is mediated by the nuclear export receptor CRM1.
Protein Families
Protein kinase superfamily, Tyr protein kinase family, TEC subfamily
Tissue Specificity
Predominantly expressed in B-lymphocytes.
Database Links

HGNC: 1133

OMIM: 300300

KEGG: hsa:695

STRING: 9606.ENSP00000308176

UniGene: Hs.159494

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