Recombinant Human LRFN5 Fc Chimera Protein, CF

When Recombinant Human LRFN5 Fc Chimera (Catalog # 9385-SA)is used at 1 μg/mL, 100 μL/well, Recombinant Human LAR (Catalog #9377-PF) binds with an ED50 of 1.5-9 μg/mL.

• Reactivity: Hu
• Applications: Bioactivity
• Format: Carrier-Free

Recombinant Human LRFN5 Fc Chimera Protein, CF Summary

• Details of Functionality: Measured by its binding ability in a functional ELISA. When Recombinant Human LRFN5 Fc Chimera is used at 1 μg/mL, the concentration of Recombinant Human LAR that produces 50% optimal binding response is 1.5-9 μg/mL.
• Source: Human embryonic kidney cell, HEK293-derived human LRFN5 protein
  

  Human LRFN5 (Gln18-Gly527) Accession # Q96NI6	IEGRMD	Human IgG1 (Pro100-Lys330)
  N-terminus		C-terminus

• Accession #: Q96NI6
• N-terminal Sequence: No results obtained. Gln18 inferred from enzymatic pyroglutamate treatment revealing Ile19
• Structure / Form: Disulfide-linked homodimer
• Protein/Peptide Type: Recombinant Proteins
• Purity: >95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
• Endotoxin Note: <0.10 EU per 1 μg of the protein by the LAL method.

Applications/Dilutions

• Theoretical MW: 83 kDa.
  Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.
• SDS-PAGE: 90-107 kDa, reducing conditions

Packaging, Storage & Formulations

• 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.
  • 3 months, -20 to -70 °C under sterile conditions after reconstitution.
• Buffer: Lyophilized from a 0.2 μm filtered solution in PBS.
• Purity: >95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
• Reconstitution Instructions: Reconstitute at 500 μg/mL in PBS.

Notes

This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.

Alternate Names for Recombinant Human LRFN5 Fc Chimera Protein, CF

• C14orf146
• chromosome 14 open reading frame 146
• DKFZp686G0210
• fibronectin type III, immunoglobulin and leucine rich repeat domains 8
• FIGLER8
• leucine rich repeat and fibronectin type III domain containing 5
• leucine-rich repeat and fibronectin type-III domain-containing protein 5
• LRFN5
• SALM5
• SALM5FLJ30803

Background

Synaptic adhesion-like molecule 5 (SALM5; also leucine-rich repeat and fibronectin type-III domain-containing protein 5 (LRFN5)) is an approximately 90 kDa member of the SALM family of type I transmembrane glycoproteins (1). LRFNs comprise a family of synaptic adhesion molecules consisting of five members, each containing of an extracellular domain (ECD) of six leucine-rich repeats (LRR), an IgC2-like domain, and a fibronectin type-III domain, tandemly aligned in that order (1, 2).  LRFN-3 and -5 lack a C-terminal intracellular PDZ binding domain, which is conserved among LRFN-1, 2 and 4. Mature human LRFN-5 shares 99% amino acid sequence identity with mature mouse LRFNs. LRFN-5, like the other LRFNs, promotes neurite outgrowth as well as playing a role in neuroinflammation (3, 4). LRFN-5 is expressed in the brain and is capable of inducing presynaptic differentiation (5). Reduced expression of LRFN-5 has been associated with autism spectrum disorders and schizophrenia (6, 7). LAR family receptor protein tyrosine phosphatases (LAR-RPTPs) have been identified as novel ligands of LRFN-5 that mediates LRFN-5 dependent presynaptic differentiation in a splicing- dependent manner. LRFN-5 interacts directly with the Ig domain of LAR-RPTPs. The postsynaptic LRFN-5 promotes synapse development by trans-synaptically interacting with presynaptic  LAR-RPTPs which is important for the regulation of excitatory synaptic strength (8).

1. Morimura, N. et al. (2006) Gene 380:72.
2. Wang, C.-Y. et al. (2006) J. Neurosci. 26:2174.
3. Wang, P.Y. et al. (2008) Mol. Cell. Neurosci. 39:83.
4. Yuwen, Z. et al. (2106) Sci Adv. Apr;2(4).
5. Choi, Y. et al. (2016) Sci Adv. Apr; 2(4).
6. de Bruijn D.R.H. et al. (2010) Mol Syndromol 46.
7. Xu, B. et al. (2009) PNAS 106:16746.
8. Choi, Y. et.al. (2016) Sci Rep. 6:26676.

Bioinformatics

• Uniprot:
  • Q96NI6()