Catalog # PM5351

Plexin A1 (Sema Domain) M535 Antibody

Mouse Monoclonal

Application / Dilution

Size 100 μl

Species Reactivity Hu, Rt, Ms

MW 220 kDa

Isotype IgG1



Plexins are a family of large integral membrane proteins that complex with neuropilins to form semaphorin co-receptors. The extracellular region of plexins contains a semaphorin domain, multiple glycine-rich motifs, and MET-related sequences. The cytoplasmic region contains a Sex/Plexin domain and putative tyrosine phosphorylation sites that mediate signal transduction after activation. This region in Plexin-A1 binds the RhoGTPases, Rnd1 and RhoD. Recruitment of Rnd1 has been implicated in the cytoskeletal collapse that occurs after semaphorin-mediated activation of Plexin-A1, while RhoD may block this collapsing activity through interaction with the cytoplasmic region of Plexin-A1. The expression of Plexin-A1, along with the co-receptor Neuropilin-1, is upregulated in neurons after central nervous system injury. The axons from these neurons cannot cross semaphorin 3A-containing regions at the site of injury. Thus, semaphorin 3A and its co-receptors, Plexin-A1 and Neuropilin-1, may have significant roles in axon regeneration after neuronal injury.


Takahashi, T. & Strittmatter, S.M. (2001) Neuron 29:429.
Tamagnone, L. et al. (1999) Cell 99:71.
Kolodkin, A.L. et al. (1993) Cell 75:1389.

Western blots showing mouse recombinant Plexin-A1 extracellular domain (lanes 1-4). These blots were probed with rabbit polyclonal anti-Plexin-A1 (PP1301) at 1:250 (lane 1) and 1:1000 (lane 2) or with mouse monoclonal anti-Plexin A1 (PM5351) at 1:250 (lane 3) and 1:1000 (lane 4).

Immunocytochemical labeling of Plexin A1 in aldehyde fixed and NP-40 permeabilized human NCI-H1299 lung carcinoma cells. The cells were labeled with mouse monoclonal anti-Plexin A1 (PM5351). The antibody was detected using goat anti-mouse DyLight® 594.

Clone M535 was generated from a Plexin-A1 synthetic peptide (coupled to carrier protein) corresponding to a region within the N-terminal half of the semaphorin domain in human Plexin-A1. This sequence is highly conserved in rat and mouse Plexin-A1, and has low homology to other Plexin family members.

*For more information, see UniProt Accession Q9UIW2
Mouse monoclonal, affinity-purified antibody is supplied in 100µl phosphate-buffered saline, 50% glycerol, 1 mg/ml BSA, and 0.05% sodium azide. Store at –20°C. Stable for 1 year.

The products are are safely shipped at ambient temperature for both domestic and international shipments. Each product is guaranteed to match the specifications as indicated on the corresponding technical data sheet. Please store at -20C upon arrival for long term storage.

Clone M535 was affinity purified using Plexin A1 (Sema Domain) peptide (without carrier). The antibody detects a 220 kDa* protein corresponding to the apparent molecular mass of Plexin-A1 on SDS-PAGE immunoblots of neonatal mouse brain, and detects a recombinant mouse Plexin A1 protein containing the extracellular region.

*All molecular weights (MW) are confirmed by comparison to Bio-Rad Rainbow Markers and to western blot mobilities of known proteins with similar MW.

This kit contains: