Human LAMP2/CD107b Antibody

  
  • Species Reactivity
    Human
  • Specificity
    Detects human LAMP2/CD107b in direct ELISAs and Western blots. In direct ELISAs, less than 1% cross-reactivity with recombinant human LAMP1 is observed.
  • Source
    Polyclonal Goat IgG
  • Purification
    Antigen Affinity-purified
  • Immunogen
    Mouse myeloma cell line NS0-derived recombinant human LAMP2/CD107b
    Leu29-Phe375
    Accession # P13473
  • Formulation
    Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied as a 0.2 µm filtered solution in PBS.
  • Label
    Unconjugated
Applications
  •  
    Recommended
    Concentration
    Sample
  • Western Blot
    1 µg/mL
    See below
  • CyTOF-ready
    Ready to be labeled using established conjugation methods. No BSA or other carrier proteins that could interfere with conjugation.
  • Immunocytochemistry
    5-15 µg/mL
    See below
  • Intracellular Staining by Flow Cytometry
    2.5 µg/106 cells
    See below
Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.
Data Examples
Detection of Human LAMP2/CD107b by Western Blot. Western blot shows lysates of JAR human choriocarcinoma cell line, JEG‑3 human epithelial choriocarcinoma cell line, and human placenta tissue. PVDF membrane was probed with 1 µg/mL of Goat Anti-Human LAMP2/CD107b Antigen Affinity-purified Polyclonal Antibody (Catalog # AF6228) followed by HRP-conjugated Anti-Goat IgG Secondary Antibody (Catalog # HAF019). Specific bands were detected for LAMP2/CD107b at approximately 100-120 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.
Immunocytochemistry
LAMP2/CD107b in HeLa Human Cell Line. LAMP2/CD107b was detected in immersion fixed HeLa human cervical epithelial carcinoma cell line using Goat Anti-Human LAMP2/CD107b Antigen Affinity-purified Polyclonal Antibody (Catalog # AF6228) at 15 µg/mL for 3 hours at room temperature. Cells were stained using the Northern­Lights™ 557-conjugated Anti-Goat IgG Secondary Antibody (red; Catalog # NL001) and counterstained with DAPI (blue). Specific staining was localized to lysosomes. View our protocol for Fluorescent ICC Staining of Cells on Coverslips.
Intracellular Staining by Flow Cytometry
Detection of LAMP-2A in HeLa Human Cell Line by Flow Cytometry. HeLa human cervical epithelial carcinoma cell line was stained with Goat Anti-Human LAMP2/CD107b Antigen Affinity-purified Polyclonal Antibody (Catalog # AF6228, filled histogram) or control antibody (Catalog # AB‑108‑C, open histogram), followed by Allophycocyanin-conjugated Anti-Goat IgG Secondary Antibody (Catalog # F0108). To facilitate intracellular staining, cells were fixed with paraformaldehyde and permeabilized with saponin.
Preparation and Storage
  • Reconstitution
    Sterile PBS to a final concentration of 0.2 mg/mL.
  • Shipping
    The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °C
  • Stability & Storage
    Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
    • 12 months from date of receipt, -20 to -70 °C as supplied.
    • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
    • 6 months, -20 to -70 °C under sterile conditions after reconstitution.
Background: LAMP-2/CD107b
Lysosomal associated membrane protein 2 (LAMP2), also known as CD107b and LGP110, is an approximately 110 kDa transmembrane glycoprotein that is a major component of lysosomal membranes (1). Mature human LAMP2 consists of a 347 amino acid (aa) intralumenal domain, a 24 aa transmembrane segment, and a 35 aa cytoplasmic tail (2). Its lumenal domain is organized into two heavily N-glycosylated regions separated by a Ser/Pro-rich linker that carries a minor amount of O‑linked glycosylation (2, 3). Alternate splicing generates a human LAMP2 isoform (LAMP2B) with a substituted juxtamembrane lumenal region, transmembrane segment, and cytoplasmic tail (4). Within the lumenal domain, human LAMP2 shares approximately 64% aa sequence identity with mouse and rat LAMP2. LAMP2 itself is subject to lysosomal degradation following cleavage of its lumenal domain (5). It mediates the lysosomal uptake of the chaperone HSC73 in complex with cargo proteins and is required for the lysosomal destruction of autophagic vacuoles (6, 7). In cytotoxic T cells and mast cells, LAMP2 is expressed in the membranes of intracellular granules that contain effector molecules such as perforin, granzymes, eicosanoids, and histamine (8-10). Up‑regulated LAMP2 at the plasma membrane serves as an indicator of cell activation of CD8+ T cells, mast cells, monocytes, and platelets (9-12). LAMP2 is a native ligand for lectins Galectin-1 and Galectin-3 (13‑15).
  • References:
    1. Eskelinen, E.-L. et al. (2003) Trends Cell Biol. 13:137.
    2. Fukuda, M. et al. (1988) J. Biol. Chem. 263:18920.
    3. Carlsson, S.R. et al. (1988) J. Biol. Chem. 263:18911.
    4. Konecki, D.S. et al. (1995) Biochem. Biophys. Res. Commun. 215:757.
    5. Cuervo, A.M. and J.F. Dice (2000) Traffic 1:570.
    6. Cuervo, A.M. and J.F. Dice (1996) Science 273:501.
    7. Tanaka, Y. et al. (1990) Nature 406:902.
    8. Peters, P.J. et al. (1991) J. Exp. Med. 173:1099.
    9. Betts, M.R. et al. (2003) J. Immunol. Meth. 281:65.
    10. Grutzkau, A. et al. (2004) Cytometry 61:62.
    11. Kannan, K. et al. (1996) Cell. Immunol. 171:10.
    12. Silverstein, R.L. and M. Febbraio (1992) Blood 80:1470.
    13. Skrincosky, D.M. et al. (1993) Cancer Res. 53:2667.
    14. Inohara, H. and Raz, A. (1994) Biochem. Biophys. Res. Commun. 201:1366.
    15. Ohannesian D.W. et al. (1994) Cancer Res. 54:5992.
  • Long Name:
    Lysosome-associated Membrane Glycoprotein 2
  • Entrez Gene IDs:
    3920 (Human)
  • Alternate Names:
    CD107 antigen-like family member B; CD107b antigen; CD107b; LAMP2; LAMP-2; LAMPB; LGP110; lysosomal-associated membrane protein 2; lysosome-associated membrane glycoprotein 2; Lysosome-associated membrane protein 2
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