Nogo-A Antibody [Alexa Fluor® 750]

• Applications: WB, ICC/IF
• Clonality: Polyclonal
• Host: Sheep
• Conjugate: Alexa Fluor 750

Nogo-A Antibody [Alexa Fluor® 750] Summary

• Immunogen: Chinese hamster ovary cell line CHO-derived recombinant human Nogo-A
  Val566-Phe748
  Accession # Q9NQC3
• Specificity: Detects human Nogo-A in direct ELISAs and Western blots. In direct ELISAs, approximately 5% cross-reactivity with recombinant rat Nogo-A (aa 543-725) and recombinant human Nogo-B is observed..
• Isotype: IgG
• Clonality: Polyclonal
• Host: Sheep
• Purity Statement: Antigen Affinity-purified

Packaging, Storage & Formulations

• Storage: Protect from light. Do not freeze. 12 months from date of receipt, 2 to 8 °C as supplied
• Buffer: Supplied 0.2mg/ml in 1X PBS with RDF1 and 0.09% Sodium Azide

Notes

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

Background

Human Nogo-A (also reticulon-4) is a member of the reticulon family of transmembrane proteins. This family is characterized by the presence of a nonsignal sequence-containing N-terminus, a topologically conserved 200 amino acid (aa) C-terminus that contains two transmembrane domains with an ER-retention motif, and a punctate intracellular distribution within the ER that is reminescent of a reticulum (1-4). In human, Nogo exists in five isoforms (5-7). The full length human form (Nogo-A) is 1192 aa in length and contains a 1018 aa N-terminus, a 21 aa transmembrane segment, a 94 aa connecting “loop”, a second 21 aa transmembrane segment, and a 38 aa C-terminus. Three areas are of particular interest. One is a stretch of 66 aa within the 94 aa connecting loop. This segment is reported to bind to the GPI-linked Nogo receptor/p75 complex on axons and induce growth cone collapse (8-10). Two other areas in the N-terminus have also been discovered to have bioactivity (8, 11, 12). Based on rat, aa 57-184 in human (aa 59-172 in rat) should block fibroblast spreading, while aa 566-748 in human (aa 544-725 in rat) block neurite outgrowth and block fibroblast spreading (8, 12, 13). The exact topology of Nogo-A is unclear. The N- and C-termini may be extracellular with the “loop” region intracellular, or the situation could be reversed (13-15). Alternatively, the loop region and N-terminus may be on the same side of the membrane (3, 8). The four additional isoforms are shorter than Nogo-A (199 aa [Nogo-C], 373 aa [Nogo-B], 392 aa and 986 aa, respectively) (7). Although highly divergent, all contain the same C-terminal stretch, aa 1005-1192. Both Nogo-B and C are reported to complex with Nogo-A (16). Notably, Nogo-A is expressed in neurons, endothelial cells. oligodendrocytes, fibroblasts and myoblasts (12, 16-18). Human Nogo-A is 78% aa identical to mouse and rat Nogo-A overall, with 98% aa identity in the loop region and approximately 80% aa identity in the aa 566-748 segment.

Limitations

This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.