PMID- 14528000 OWN - NLM STAT- MEDLINE DCOM- 20031204 LR - 20210107 IS - 0027-8424 (Print) IS - 1091-6490 (Electronic) IS - 0027-8424 (Linking) VI - 100 IP - 21 DP - 2003 Oct 14 TI - Functional map and domain structure of MET, the product of the c-met protooncogene and receptor for hepatocyte growth factor/scatter factor. PG - 12039-44 AB - Little is known about the large ectodomain of MET, the product of the c-met protooncogene and receptor for hepatocyte growth factor/scatter factor (HGF/SF). Here, we establish by deletion mutagenesis that the HGF/SF and heparin-binding sites of MET are contained within a large N-terminal domain spanning the alpha-chain (amino acids 25-307) and the first 212 amino acids of the beta-chain (amino acids 308-519). Neither the cystine-rich domain (amino acids 520-561) nor the C-terminal half of MET (amino acids 562-932) bind HGF/SF or heparin directly. The MET ectodomain, which behaves as a rod-shaped monomer with a large Stokes radius in solution, binds HGF/SF in the absence or presence of heparin, and forms a stable HGF/SF-heparin-MET complex with 1:1:1 stoichiometry. We also show that the ligand-binding domain adopts a beta-propeller fold, which is similar to the N-terminal domain of alphaV integrin, and that the C-terminal half contains four Ig domains (amino acids 563-654, 657-738, 742-836, and 839-924) of the unusual structural E set, which could be modeled on bacterial enzymes. Our studies provide 3D models and a functional map of the MET ectodomain. They have broad implications for structure-function of the MET receptor and the related semaphorin and plexin proteins. FAU - Gherardi, Ermanno AU - Gherardi E AD - Medical Research Council Centre, Hills Road, Cambridge CB2 2QH, United Kingdom. egherard@mrc-lmb.cam.ac.uk FAU - Youles, Mark E AU - Youles ME FAU - Miguel, Ricardo N AU - Miguel RN FAU - Blundell, Tom L AU - Blundell TL FAU - Iamele, Luisa AU - Iamele L FAU - Gough, Julian AU - Gough J FAU - Bandyopadhyay, Abhishek AU - Bandyopadhyay A FAU - Hartmann, Guido AU - Hartmann G FAU - Butler, P Jonathan G AU - Butler PJ LA - eng GR - G9704528/MRC_/Medical Research Council/United Kingdom PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20031003 PL - United States TA - Proc Natl Acad Sci U S A JT - Proceedings of the National Academy of Sciences of the United States of America JID - 7505876 RN - 0 (Macromolecular Substances) RN - 0 (Recombinant Proteins) RN - 67256-21-7 (Hepatocyte Growth Factor) RN - 9005-49-6 (Heparin) RN - EC 2.7.10.1 (Proto-Oncogene Proteins c-met) SB - IM MH - Amino Acid Sequence MH - Binding Sites/genetics MH - Heparin/metabolism MH - Hepatocyte Growth Factor/chemistry/metabolism MH - Humans MH - In Vitro Techniques MH - Macromolecular Substances MH - Models, Molecular MH - Molecular Sequence Data MH - Protein Conformation MH - Protein Folding MH - Protein Structure, Tertiary MH - Proto-Oncogene Proteins c-met/*chemistry/genetics/*metabolism MH - Proto-Oncogenes MH - Recombinant Proteins/chemistry/genetics/metabolism MH - Sequence Deletion PMC - PMC218709 EDAT- 2003/10/07 05:00 MHDA- 2003/12/05 05:00 PMCR- 2004/04/14 CRDT- 2003/10/07 05:00 PHST- 2003/10/07 05:00 [pubmed] PHST- 2003/12/05 05:00 [medline] PHST- 2003/10/07 05:00 [entrez] PHST- 2004/04/14 00:00 [pmc-release] AID - 2034936100 [pii] AID - 10012039 [pii] AID - 10.1073/pnas.2034936100 [doi] PST - ppublish SO - Proc Natl Acad Sci U S A. 2003 Oct 14;100(21):12039-44. doi: 10.1073/pnas.2034936100. Epub 2003 Oct 3.