Human/Mouse LRRC4 Antibody

  
  • Species Reactivity
    Human, Mouse
  • Specificity
    Detects human and mouse LRRC4 in direct ELISAs and Western blots. In direct ELISAs and Western blots, no cross-reactivity with recombinant human (rh) LRRC3, rhLRRC4B, or rhLRRC32 is observed.
  • Source
    Monoclonal Mouse IgG2B Clone # 701424
  • Purification
    Protein A or G purified from hybridoma culture supernatant
  • Immunogen
    Chinese hamster ovary cell line CHO-derived recombinant human LRRC4
    Ala39-Lys527
    Accession # Q9HBW1
  • 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
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 and Mouse LRRC4 by Western Blot. Western blot shows lysates of human brain (hypothalamus) tissue and mouse brain tissue. PVDF membrane was probed with 1 µg/mL of Mouse Anti-Human LRRC4 Monoclonal Antibody (Catalog # MAB4995) followed by HRP-conjugated Anti-Mouse IgG Secondary Antibody (Catalog # HAF007). A specific band was detected for LRRC4 at approximately 80 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.
Preparation and Storage
  • Reconstitution
    Sterile PBS to a final concentration of 0.5 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: LRRC4

LRRC4 (Leucine rich repeat/LRR-containing protein 4), also called NGL-2 (netrin-G ligand-2) or NAG14 (nasopharyngeal carcinoma-associated gene 14) is a 55 kDa (predicted, unglycosylated) type I transmembrane protein that is a member of the NGL family of synaptic LRR adhesion molecules (1, 2). Human LRRC4 cDNA encodes 653 amino acids (aa) that include a 38 aa signal sequence, a 489 aa extracellular domain (ECD), a 21 aa transmembrane domain, and a 105 aa cytoplasmic domain. The ECD contains nine LRRs (aa 74‑288), a C2 type Ig like domain (aa 354‑440), and a Thr-rich segment (aa 455‑526). Within the ECD, human LRRC4 shares 98% aa identity with mouse and rat, 99% aa identity with canine and bovine, and 99.6% aa identity with equine LRRC4. It also shares 54‑55% aa identity with family members LRRC4C/NGL-1 and LRRC4B/NGL-3, but each recognizes different ligands (1). LRRC4 is predominantly expressed in the brain on neurons and astrocytes as a ligand for netrin-G2 on the dendritic surface of synaptic neurons (2-4). It is proposed to regulate the formation of excitatory synapses via recruitment of PSD-95 to the cytoplasmic domain after aggregation of LRRC4 at the surface (3, 5). It suppresses proliferation by downregulating cell signaling pathways, resulting in altered expression of cell cycle regulating proteins and delay at the late G1 phase (1, 2, 6-8). It is thus considered a tumor suppressor protein and is often downregulated in brain tumors, particularly gliomas (1, 2, 6). Forced expression of LRRC4 in tumor cells slows proliferation and promotes differentiation (1, 4, 9). Addition of soluable LRRC4 to cultured neurons reduces excitatory synapse formation (3).

  • References:
    1. Woo, J. et al. (2009) Mol. Cell. Neurosci. 42:1.
    2. Zhang, Q. et al. (2005) FEBS Lett. 579:3674.
    3. Kim, S. et al. (2006) Nat. Neurosci. 9:1294.
    4. Wu, M. et al. (2007) Acta Biochim Biophys Sin (Shanghai) 39:731.
    5. Nishimura-Akiyoshi, S. et al. (2007) Proc. Natl. Acad. Sci. USA 104:14801.
    6. Wu, M. et al. (2006) Mol. Biol. Cell 17:3534.
    7. Wu, M. et al. (2008) J. Cell. Biochem. 103:245.
    8. Wu, M. et al. (2008) J. Cell. Physiol. 214:65.
    9. Zhang, W. et al. (2008) Genes Brain Behav. 7:385.
  • Long Name:
    Leucine-rich Repeat Containing 4
  • Entrez Gene IDs:
    64101 (Human); 192198 (Mouse); 641521 (Rat)
  • Alternate Names:
    BAG; Brain Tumor Associated Protein LRRC4; Brain Tumor-Associated Protein BAG; Leucine Rich Repeat Containing 4; Leucine-Rich Repeat-Containing 4; Leucine-Rich Repeat-Containing Protein 4; LRRC4; NAG14; Nasopharyngeal Carcinoma-Associated Gene 14 Protein; Netrin-G2 Ligand; NGL-2
Related Research Areas
Isotype Controls
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Mouse IgG2B Isotype Control

Ctrl MAB004 32  
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Mouse IgG2B Isotype Control

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Mouse IgG2B Isotype Control

Ctrl MAB0042 6
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Secondary Antibodies
Description Application Cat# Citations Images  

Mouse IgG HRP-conjugated Antibody

WB HAF007 26  
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Mouse F(ab)2 IgG (H+L) PE-conjugated Antibody

Flow F0102B 10  
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Donkey Anti-Mouse IgG NorthernLights™ NL557-conjugate Antibody

Flow, IHC, ICC NL007 9
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Donkey Anti-Mouse IgG Biotinylated Antibody

WB BAF018 1
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Mouse IgG HRP-conjugated Antibody

WB HAF018 9  
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Donkey Anti-Mouse IgG NorthernLights™ NL637-conjugated Antibody

Flow, IHC, ICC NL008 8
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Mouse F(ab)2 IgG (H+L) APC-conjugated Antibody

Flow F0101B 2  
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Donkey Anti-Mouse IgG NorthernLights™ NL493-conjugated Antibody

Flow, IHC, ICC NL009 5
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Mouse F(ab)2 IgG (H+L) Fluorescein-conjugated Antibody

Flow F0103B 5  
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Goat Anti-Mouse IgG Biotinylated Antibody

WB BAF007 4
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Mouse IgG Antibody

WB AF007 4
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Mouse/Rabbit IgG VisUCyte HRP Polymer Antibody

IHC VC002  
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Rat Anti-Mouse IgG2B APC-conjugated Antibody

Flow F0133 1  
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Mouse IgG VisUCyte HRP Polymer Antibody

IHC VC001  
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Mouse F(ab)2 IgG (H+L) PerCP-conjugated Antibody

Flow F0114  
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Goat Anti-Mouse IgG Fc Affinity Purified Polyclonal Ab

G-202-C 2
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Rat Anti-Mouse IgG2B PE-conjugated Antibody

Flow F0132  
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Mouse IgG2B Antibody

Flow MAB0043  
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Rat Anti-Mouse IgG2B Fluorescein-conjugated Antibody

Flow F0134 1
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