PMID- 16279944 OWN - NLM STAT- MEDLINE DCOM- 20051230 LR - 20210108 IS - 1742-464X (Print) IS - 1742-464X (Linking) VI - 272 IP - 22 DP - 2005 Nov TI - Crystal structure of the beta-chain of human hepatocyte growth factor-like/macrophage stimulating protein. PG - 5799-807 AB - Hepatocyte growth factor like/macrophage stimulating protein (HGFl/MSP) and hepatocyte growth factor/scatter factor (HGF/SF) define a distinct family of vertebrate-specific growth factors structurally related to the blood proteinase precursor plasminogen and with important roles in development and cancer. Although the two proteins share a similar domain structure and mechanism of activation, there are differences between HGFl/MSP and HGF/SF in terms of the contribution of individual domains to receptor binding. Here we present a crystal structure of the 30 kDa beta-chain of human HGFl/MSP, a serine proteinase homology domain containing the high-affinity binding site for the RON receptor. The structure describes at 1.85 Angstrom resolution the region of the domain corresponding to the receptor binding site recently defined in the HGF/SF beta-chain, namely the central cleft harboring the three residues corresponding to the catalytic ones of active proteinases (numbers in brackets define the sequence position according to the standard chymotrypsinogen numbering system) [Gln522 (c57), Gln568 (c102) and Tyr661 (c195)] and an adjacent loop flanking the S1 specificity pocket and containing residues Asn682 (c217) and Arg683 (c218) previously shown to be essential for binding of HGFl/MSP to the RON receptor. The study confirms the concept that the serine proteinase homology domains of HGFl/MSP and HGF/SF bind their receptors in an 'enzyme-substrate' mode, reflecting the common evolutionary origin of the plasminogen-related growth factors and the proteinases of the clotting and fibrinolytic pathways. However, analysis of the intermolecular interactions in the crystal lattice of beta-chain HGFl/MSP fails to show the same contacts seen in the HGF/SF structures and does not support a conserved mode of dimerization of the serine proteinase homology domains of HGFl/MSP and HGF/SF responsible for receptor activation. FAU - Carafoli, Federico AU - Carafoli F AD - MRC Centre, Hills Road, Cambridge, UK. FAU - Chirgadze, Dimitri Y AU - Chirgadze DY FAU - Blundell, Tom L AU - Blundell TL FAU - Gherardi, Ermanno AU - Gherardi E LA - eng SI - PDB/2ASU GR - G9704528/MRC_/Medical Research Council/United Kingdom GR - WT_/Wellcome Trust/United Kingdom PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - FEBS J JT - The FEBS journal JID - 101229646 RN - 0 (HGF protein, human) RN - 67256-21-7 (Hepatocyte Growth Factor) RN - EC 2.7.10.1 (RON protein) RN - EC 2.7.10.1 (Receptor Protein-Tyrosine Kinases) SB - IM MH - Amino Acid Sequence MH - Binding Sites MH - *Crystallography, X-Ray MH - Hepatocyte Growth Factor/*chemistry/genetics/*metabolism MH - Humans MH - Models, Molecular MH - Molecular Sequence Data MH - Mutagenesis, Site-Directed MH - Mutation MH - Protein Binding MH - Protein Structure, Secondary MH - Protein Structure, Tertiary MH - Receptor Protein-Tyrosine Kinases/metabolism MH - Sequence Homology, Amino Acid MH - Spectrum Analysis, Raman MH - X-Ray Diffraction EDAT- 2005/11/11 09:00 MHDA- 2005/12/31 09:00 CRDT- 2005/11/11 09:00 PHST- 2005/11/11 09:00 [pubmed] PHST- 2005/12/31 09:00 [medline] PHST- 2005/11/11 09:00 [entrez] AID - EJB4968 [pii] AID - 10.1111/j.1742-4658.2005.04968.x [doi] PST - ppublish SO - FEBS J. 2005 Nov;272(22):5799-807. doi: 10.1111/j.1742-4658.2005.04968.x.