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14-442M Lck Protein, active, 250 µg

Active, N-terminal His6-tagged, recombinant full-length human Lck, for use in Kinase Assays.

Lck Protein, active, 250 µg MSDS (material safety data sheet) or SDS, CoA and CoQ, dossiers, brochures and other available documents.
14-442M
250 µg  Also available in 10 μg size (cat#14-442) and in bulk (cat# 14-442-K).
Purchase on Sigma-Aldrich

Overview

Replacement Information
Description
Catalogue Number14-442M
Brand Family Upstate
Trade Name
  • Upstate
DescriptionLck Protein, active, 250 µg
OverviewN-terminal His6-tagged, recombinant full-length human Lck
References
Product Information
Quality LevelMQ100
Applications
ApplicationActive, N-terminal His6-tagged, recombinant full-length human Lck, for use in Kinase Assays.
Key Applications
  • Kinase Assay
Biological Information
Sourceexpressed in Sf21 insect cells
Specific ActivityFor Specific Activity data, refer to the Certificate of Analysis for individual lots of this enzyme.
Entrez Gene Number
Entrez Gene SummaryThis 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.
Gene Symbol
  • LCK
  • p56lck
  • YT16
  • pp58lck
  • p56-LCK
  • LSK
Protein TargetLck
Purification MethodNi2+/NTA-agarose
Target Sub-FamilyTK
UniProt Number
UniProt SummaryFUNCTION: 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.
Molecular Weight59kDa
Physicochemical Information
Dimensions
Materials Information
Toxicological Information
Safety Information according to GHS
Safety Information
Product Usage Statements
Quality Assuranceroutinely evaluated by phosphorylation of Src substrate peptide
Usage Statement
  • 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.
Storage and Shipping Information
Storage Conditions6 months at -70C
Packaging Information
Material Size250 µg
Material PackageAlso available in 10 μg size (cat#14-442) and in bulk (cat# 14-442-K).
Transport Information
Supplemental Information
Specifications
Global Trade Item Number
Catalogue Number GTIN
14-442M 04053252474712

Related Products & Applications

Alternative Packsize

Catalogue Number Description
14-442 Lck Protein, active, 10 µg

Product Families

Kinase & Phosphatase Products

Millipore offers a large portfolio of Kinases, Phophatases, Substrates, Inhibitors, Kits, reagents & tools for Signaling research. See below for a list of these products, in multiple pack sizes.
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Categories

Life Science Research > Proteins and Enzymes > Purified Kinases
Life Science Research > Drug Discovery and Development > Kinase & Phosphatase Screening > Purified Kinases