2ORX

Structural Basis for Ligand Binding and Heparin Mediated Activation of Neuropilin

Summary for 2ORX

• Entry DOI: 10.2210/pdb2orx/pdb
• Descriptor: Neuropilin-1 (2 entities in total)
• Functional Keywords: neuropilin, vegf, tuftsin, signaling protein, membrane protein
• Biological source: Rattus norvegicus (Norway rat)
• Cellular location: Membrane; Single-pass type I membrane protein: Q9QWJ9
• Total number of polymer chains: 1
• Total formula weight: 35725.52

Authors

Vander Kooi, C.W.,Jusino, M.A.,Perman, B.,Neau, D.B.,Bellamy, H.D.,Leahy, D.J. (deposition date: 2007-02-05, release date: 2007-04-03, Last modification date: 2024-10-30)

Primary citation

Vander Kooi, C.W.,Jusino, M.A.,Perman, B.,Neau, D.B.,Bellamy, H.D.,Leahy, D.J.
Structural basis for ligand and heparin binding to neuropilin B domains
Proc.Natl.Acad.Sci.Usa, 104:6152-6157, 2007

PubMed Abstract: Neuropilin (Nrp) is a cell surface receptor with essential roles in angiogenesis and axon guidance. Interactions between Nrp and the positively charged C termini of its ligands, VEGF and semaphorin, are mediated by Nrp domains b1 and b2, which share homology to coagulation factor domains. We report here the crystal structure of the tandem b1 and b2 domains of Nrp-1 (N1b1b2) and show that they form a single structural unit. Cocrystallization of N1b1b2 with Tuftsin, a peptide mimic of the VEGF C terminus, reveals the site of interaction with the basic tail of VEGF on the b1 domain. We also show that heparin promotes N1b1b2 dimerization and map the heparin binding site on N1b1b2. These results provide a detailed picture of interactions at the core of the Nrp signaling complex and establish a molecular basis for the synergistic effects of heparin on Nrp-mediated signaling.

PubMed: 17405859
DOI: 10.1073/pnas.0700043104

Experimental method

X-RAY DIFFRACTION (2.4 Å)