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描述 产品目录编号 14-442 品牌系列 Upstate
商名 - Upstate
描述 Lck Protein, active, 10 µg 概述 N-terminal His6-tagged, recombinant full-length human Lck 应用 应用 Active, N-terminal His6-tagged, recombinant full-length human Lck, for use in Kinase Assays. 主要应用 - Kinase Assay
生物信息 来源 expressed in Sf21 insect cells 品种 Human 特异活性 For Specific Activity data, refer to the Certificate of Analysis for individual lots of this enzyme. Entrez基因编号 - NM_005356.3
- NM_001042771.1
Entrez基因汇总 This gene is a member of the Src family of protein tyrosine kinases (PTKs). The encoded protein is a key signaling molecule in the selection and maturation of developing T-cells. It contains N-terminal sites for myristylation and palmitylation, a PTK domain, and SH2 and SH3 domains which are involved in mediating protein-protein interactions with phosphotyrosine-containing and proline-rich motifs, respectively. The protein localizes to the plasma membrane and pericentrosomal vesicles, and binds to cell surface receptors, including CD4 and CD8, and other signaling molecules. Multiple alternatively spliced variants, encoding the same protein, have been described. 基因符号 - LSK
- LCK
- p56lck
- YT16
- pp58lck
- p56-LCK
蛋白靶 Lck 纯化方法 Ni2+/NTA-agarose 靶子系列 TK UniProt编号 - P06239
UniProt汇总 FUNCTION: SwissProt: P06239 # Tyrosine kinase that plays an essential role for the selection and maturation of developing T-cell in the thymus and in mature T-cell function. Is constitutively associated with the cytoplasmic portions of the CD4 and CD8 surface receptors and plays a key role in T-cell antigen receptor(TCR)-linked signal transduction pathways. Association of the TCR with a peptide antigen-bound MHC complex facilitates the interaction of CD4 and CD8 with MHC class II and class I molecules, respectively, and thereby recruits the associated LCK to the vicinity of the TCR/CD3 complex. LCK then phosphorylates tyrosines residues within the immunoreceptor tyrosines-based activation motifs (ITAMs) in the cytoplasmic tails of the TCRgamma chains and CD3 subunits, initiating the TCR/CD3 signaling pathway. In addition, contributes to signaling by other receptor molecules. Associates directly with the cytoplasmic tail of CD2, and upon engagement of the CD2 molecule, LCK undergoes hyperphosphorylation and activation. Also plays a role in the IL2 receptor-linked signaling pathway that controls T-cell proliferative response. Binding of IL2 to its receptor results in increased activity of LCK. Is expressed at all stages of thymocyte development and is required for the regulation of maturation events that are governed by both pre-TCR and mature alpha beta TCR.
SIZE: 509 amino acids; 58001 Da
SUBUNIT: Binds to the cytoplasmic domain of cell surface receptors, such as CD2, CD4, CD5, CD8, CD44, CD45 and CD122. Also binds to effector molecules, such as PI4K, VAV1, RASA1, FYB and to other protein kinases including CDC2, RAF1, ZAP70 and SYK. Binds to phosphatidylinositol 3'-kinase (PI3K) from T-lymphocytes through its SH3 domain and to the tyrosine phosphorylated form of KHDRBS1/p70 through its SH2 domain. Binds to HIV-1 Nef through its SH3 domain. This interaction inhibits its tyrosine-kinase activity. Interacts with SQSTM1. Interacts with phosphorylated LIME1. Interacts with CBLB.
SUBCELLULAR LOCATION: Cytoplasm. Cell membrane; Lipid-anchor; Cytoplasmic side. Note=Present in lipid rafts in an unactive form.
TISSUE SPECIFICITY: Expressed specifically in lymphoid cells.
DOMAIN: SwissProt: P06239 The SH2 domain mediates interaction with SQSTM1. Interaction is regulated by Ser-59 phosphorylation.
PTM: Phosphorylated on Tyr-394, which increases enzymatic activity (By similarity). Phosphorylated on Tyr-505, which decreases activity.
DISEASE:SwissProt: P06239 # A chromosomal aberration involving LCK is found in leukemias. Translocation t(1;7)(p34;q34) with TCRB.
SIMILARITY: Belongs to the protein kinase superfamily. Tyr protein kinase family. SRC subfamily. & Contains 1 protein kinase domain. & Contains 1 SH2 domain. & Contains 1 SH3 domain.产品使用声明 质量保证 routinely evaluated by phosphorylation of Src substrate peptide 使用声明 - Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.
储存和货运信息 存储条件 6 months at -70C 包装信息 数量 10 µg 包装 Also available in 250 µg size --call for pricing and availability and reference catalog number 14-442M when ordering the 250 µg size.
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