PMID- 18291418 OWN - NLM STAT- MEDLINE DCOM- 20080527 LR - 20211203 IS - 1089-8638 (Electronic) IS - 0022-2836 (Linking) VI - 377 IP - 3 DP - 2008 Mar 28 TI - Engineering the NK1 fragment of hepatocyte growth factor/scatter factor as a MET receptor antagonist. PG - 616-22 LID - 10.1016/j.jmb.2008.01.034 [doi] AB - The growth and motility factor hepatocyte growth factor/scatter factor (HGF/SF) and its receptor MET, the tyrosine kinase encoded by the c-MET proto-oncogene, exert major roles in cancer invasion and metastasis and are key targets for therapy. NK1 is an alternative spliced variant of HGF/SF that consists of the N-terminal (N) and first kringle (K1) domains and has partial agonistic activity. NK1 crystallizes as a head-to-tail dimer with an extensive inter-protomeric interface resulting from contacts between the two short interdomain linkers and reciprocal contacts between the N and K1 domains. Here we show that a subset of mutants at the NK1 dimer interface, such as the linker mutants Y124A or N127A or the kringle mutant V140A:I142A, bind the MET receptor with affinities comparable to wild-type NK1 but fail to assemble a dimeric, signalling competent NK1-MET complex. These NK1 variants have no detectable agonistic activity on, behave as bona fide receptor antagonists by blocking cell migration and DNA synthesis in target cells and have strong prospects as therapeutics for human cancer. FAU - Youles, Mark AU - Youles M AD - Medical Research Council Centre, Hills Road, Cambridge CB2 2QH, UK. FAU - Holmes, Oliver AU - Holmes O FAU - Petoukhov, Maxim V AU - Petoukhov MV FAU - Nessen, Merel A AU - Nessen MA FAU - Stivala, Simona AU - Stivala S FAU - Svergun, Dmitri I AU - Svergun DI FAU - Gherardi, Ermanno AU - Gherardi E LA - eng GR - G0501019/MRC_/Medical Research Council/United Kingdom GR - G0800025/MRC_/Medical Research Council/United Kingdom GR - G9704528/MRC_/Medical Research Council/United Kingdom PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20080118 PL - Netherlands TA - J Mol Biol JT - Journal of molecular biology JID - 2985088R RN - 0 (MAS1 protein, human) RN - 0 (Proto-Oncogene Mas) RN - 67256-21-7 (Hepatocyte Growth Factor) RN - EC 2.7.10.1 (Proto-Oncogene Proteins c-met) SB - IM MH - Alternative Splicing MH - Animals MH - Cell Line MH - Cell Movement MH - Cloning, Molecular MH - DNA Replication MH - Dimerization MH - Dogs MH - Hepatocyte Growth Factor/*chemistry/genetics/metabolism MH - Humans MH - Mice MH - Models, Molecular MH - Mutation MH - Protein Structure, Tertiary MH - Proto-Oncogene Mas MH - Proto-Oncogene Proteins c-met/*antagonists & inhibitors/metabolism EDAT- 2008/02/23 09:00 MHDA- 2008/05/28 09:00 CRDT- 2008/02/23 09:00 PHST- 2007/08/15 00:00 [received] PHST- 2007/12/22 00:00 [revised] PHST- 2008/01/14 00:00 [accepted] PHST- 2008/02/23 09:00 [pubmed] PHST- 2008/05/28 09:00 [medline] PHST- 2008/02/23 09:00 [entrez] AID - S0022-2836(08)00065-X [pii] AID - 10.1016/j.jmb.2008.01.034 [doi] PST - ppublish SO - J Mol Biol. 2008 Mar 28;377(3):616-22. doi: 10.1016/j.jmb.2008.01.034. Epub 2008 Jan 18.