Recombinant Rat Neuroligin 1/NLGN1 Protein, CF

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Recombinant Rat Neuroligin 1/NLGN1 Protein, CF Summary

Product Specifications

>95%, by SDS-PAGE under reducing conditions and visualized by silver stain
Endotoxin Level
<0.10 EU per 1 μg of the protein by the LAL method.
Measured by its binding ability in a functional ELISA. When recombinant rat Neuroligin 1 is immobilized at 5 μg/mL, biotinylated recombinant human Neurexin 1 beta Fc Chimera binds with an apparent KD <20 nM. 
Mouse myeloma cell line, NS0-derived rat Neuroligin 1/NLGN1 protein
Met1-Leu676, with a C-terminal 6-His tag
Accession #
N-terminal Sequence
No results obtained: Gln46 predicted
Predicted Molecular Mass
71 kDa
85-105 kDa, reducing conditions

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Carrier Free

What does CF mean?

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

What formulation is right for me?

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.


Formulation Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitution Reconstitute at 500 μg/mL in PBS.
Shipping The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
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.
  • 3 months, -20 to -70 °C under sterile conditions after reconstitution.
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Background: Neuroligin 1/NLGN1

Neuroligin 1 (NLGN1 or NL1) is one of several type I transmembrane Neuroligin proteins that play an important role in synaptic development (1). Mature rat Neuroligin 1 is an N- and O-glycosylated 120 kDa molecule that consists of a 652 amino acid (aa) extracellular domain (ECD) with a catalytically inactive cholinesterase-like domain, a 21 aa transmembrane segment, and a 125 aa cytoplasmic tail (2). Insertion of 20 aa at splice site A and/or 9 aa at splice site B within the ECD results in NLGN1A, NLGN1B, or NLGN1AB isoforms while the NLGN1(-) isoform has neither insertion (3). This recombinant protein (NLGN1B) contains the insert at splice site B but not the insert at splice site A. Within the ECD, rat NLGN1B shares 99% aa sequence identity with comparable regions of human and mouse Neuroligin 1. Neuroligin 1 expression is restricted to postsynaptic nerve terminal membranes where it associates into dimers and tetramers (5 - 7). NLGN1B and NLGN1AB are enriched at excitatory (glutamatergic) contacts, whereas NLGN1A is enriched at inhibitory (GABAergic) contacts and NLGN1(-) is expressed at both (3). The interaction of Neuroligin 1 with presynaptic membrane Neurexins promotes the maturation of presynaptic as well as postsynaptic structures (3, 4, 8 - 11). Neuroligin 1 isoforms are selective in which Neurexin isoforms they bind: NLGN1B and NLGN1AB preferentially interact with Neurexin 1 beta lacking the splice site 4 insert, while NLGN1A and NLGN1(-) bind Neurexin 1 alpha and Neurexin 1 beta irrespective of the SS4 insert (12). Neurexin 1 beta (-SS4) additionally binds to LRRTM2 to trigger a second mechanism that promotes excitatory synapse development (13, 14). Neuroligin 1 mediated synaptogenesis is also enhanced by its direct binding to Thrombospondin 1 (15).

  1. Sudhof, T.C. (2008) Nature 455:903.
  2. Ichtchenko, K. et al. (1995) Cell 81:435.
  3. Chih, B. et al. (2006) Neuron 51:171.
  4. Dean, C. et al. (2003) Nat. Neurosci. 7:708.
  5. Comoletti, D. et al. (2006) Biochemistry 45:12816.
  6. Berninghausen, O. et al. (2007) J. Neurochem. 103:1855.
  7. Song, J.-Y. et al. (1999) Proc. Natl. Acad. Sci. 96:1100.
  8. Wittenmayer, N. et al. (2009) Proc. Natl. Acad. Sci. 106:13564.
  9. Jung, S.-Y. et al. (2010) Proc. Natl. Acad. Sci. 107:4710.
  10. Chubykin, A.A. et al. (2007) Neuron 54:919.
  11. Chih, B. et al. (2005) Science 307:1324.
  12. Boucard, A.A. et al. (2005) Neuron 48:229.
  13. Siddiqui, T.J. et al. (2010) J. Neurosci. 30:7495.
  14. Ko, J. et al. (2009) Neuron 64:791.
  15. Xu, J. et al. (2010) Nat. Neurosci. 13:22.
Entrez Gene IDs
22871 (Human); 192167 (Mouse); 116647 (Rat)
Alternate Names
EC 3.1.1; EC; KIAA1070neuroligin-1; MGC45115; Neuroligin 1; NL1; Nlg; NLGN1

Citations for Recombinant Rat Neuroligin 1/NLGN1 Protein, CF

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

2 Citations: Showing 1 - 2
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  1. The soluble neurexin-1&beta ectodomain causes calcium influx and augments dendritic outgrowth and synaptic transmission
    Authors: KDB Wierda, TL Toft-Berte, CR Gøtzsche, E Pedersen, I Korshunova, J Nielsen, ML Bang, AB Kønig, S Owczarek, MD Gjørlund, M Schupp, E Bock, JB Sørensen
    Sci Rep, 2020;10(1):18041.
    Species: Rat
    Sample Types: Whole Cells
    Applications: Surface Plasmon Resonance
  2. Interaction of A? Oligomers with Neurexin 2? and Neuroligin 1 Mediates Synapse Damage and Memory Loss in Mice
    Authors: J Brito-More, MV Lourenco, MM Oliveira, JF Vital, FC Ribeiro, JH Ledo, LP Diniz, MH Magdesian, HM Melo, F Barros-Ara, JM de Souza, SV Alves-Leon, FC Gomes, JR Clarke, CP Figueiredo, FG De Felice, ST Ferreira
    J. Biol. Chem, 2017;0(0):.
    Species: Mouse
    Sample Types: Protein
    Applications: Bioassay


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