TY - JOUR
T1 - Chemical synthesis and structure of the prokineticin Bv8
AU - Morales, Rodrigo A.V.
AU - Daly, Norelle L
AU - Vetter, Irina
AU - Mobli, Mehdi
AU - Napier, Ian A.
AU - Craik, David J.
AU - Lewis, Richard J
AU - Christie, Macdonald J
AU - King, Glenn Frederick
AU - Alewood, Paul F
AU - Durek, Thomas
PY - 2010/9/3
Y1 - 2010/9/3
N2 - Bv8, a 77-residue protein isolated from frogs, is the prototypic member of the prokineticin family of cytokines. Prokineticins (PKs) have only recently been identified in vertebrates (including humans), and they are believed to be involved in a number of key physiological processes, such as angiogenesis, neurogenesis, nociception, and tissue development. We used a combination of Boc solid-phase peptide synthesis, native chemical ligation, and in vitro protein folding to establish robust chemical access to this molecule. Synthetic Bv8 was obtained in good yield and exhibited full activity in a human neuroblastoma cell line and rat dorsal root ganglion (DRG) neurons. The 3D structure of the synthetic protein was determined by using NMR spectroscopy and it was found to be homologous with that of mamba intestinal toxin 1, which is the only other known prokineticin structure. Analysis of a truncated mutant lacking five residues at the N terminus that are critical for receptor binding and activation showed no perturbation to the core protein structure. Together with the functional data, this suggests that receptor binding is likely to be a highly cooperative process possibly involving major allosterically driven structural rearrangements. The facile and efficient synthesis presented here will enable preparation of unique chemical analogues of prokineticins, which should be powerful tools for modulating the structure and function of prokineticins and their receptors, and studying the many physiological processes that have been linked to them.
AB - Bv8, a 77-residue protein isolated from frogs, is the prototypic member of the prokineticin family of cytokines. Prokineticins (PKs) have only recently been identified in vertebrates (including humans), and they are believed to be involved in a number of key physiological processes, such as angiogenesis, neurogenesis, nociception, and tissue development. We used a combination of Boc solid-phase peptide synthesis, native chemical ligation, and in vitro protein folding to establish robust chemical access to this molecule. Synthetic Bv8 was obtained in good yield and exhibited full activity in a human neuroblastoma cell line and rat dorsal root ganglion (DRG) neurons. The 3D structure of the synthetic protein was determined by using NMR spectroscopy and it was found to be homologous with that of mamba intestinal toxin 1, which is the only other known prokineticin structure. Analysis of a truncated mutant lacking five residues at the N terminus that are critical for receptor binding and activation showed no perturbation to the core protein structure. Together with the functional data, this suggests that receptor binding is likely to be a highly cooperative process possibly involving major allosterically driven structural rearrangements. The facile and efficient synthesis presented here will enable preparation of unique chemical analogues of prokineticins, which should be powerful tools for modulating the structure and function of prokineticins and their receptors, and studying the many physiological processes that have been linked to them.
KW - G protein-coupled receptors
KW - Native chemical ligation
KW - NMR spectroscopy
KW - Protein folding
KW - Solid-phase synthesis
UR - http://www.scopus.com/inward/record.url?scp=77956235502&partnerID=8YFLogxK
U2 - 10.1002/cbic.201000330
DO - 10.1002/cbic.201000330
M3 - Article
C2 - 20677202
AN - SCOPUS:77956235502
VL - 11
SP - 1882
EP - 1888
JO - ChemBioChem
JF - ChemBioChem
SN - 1439-4227
IS - 13
ER -