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-Structure paper
Title | Structural basis of the activation of c-MET receptor. |
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Journal, issue, pages | Nat Commun, Vol. 12, Issue 1, Page 4074, Year 2021 |
Publish date | Jul 1, 2021 |
Authors | Emiko Uchikawa / Zhiming Chen / Guan-Yu Xiao / Xuewu Zhang / Xiao-Chen Bai / |
PubMed Abstract | The c-MET receptor is a receptor tyrosine kinase (RTK) that plays essential roles in normal cell development and motility. Aberrant activation of c-MET can lead to both tumors growth and metastatic ...The c-MET receptor is a receptor tyrosine kinase (RTK) that plays essential roles in normal cell development and motility. Aberrant activation of c-MET can lead to both tumors growth and metastatic progression of cancer cells. C-MET can be activated by either hepatocyte growth factor (HGF), or its natural isoform NK1. Here, we report the cryo-EM structures of c-MET/HGF and c-MET/NK1 complexes in the active state. The c-MET/HGF complex structure reveals that, by utilizing two distinct interfaces, one HGF molecule is sufficient to induce a specific dimerization mode of c-MET for receptor activation. The binding of heparin as well as a second HGF to the 2:1 c-MET:HGF complex further stabilize this active conformation. Distinct to HGF, NK1 forms a stable dimer, and bridges two c-METs in a symmetrical manner for activation. Collectively, our studies provide structural insights into the activation mechanisms of c-MET, and reveal how two isoforms of the same ligand use dramatically different mechanisms to activate the receptor. |
External links | Nat Commun / PubMed:34210960 / PubMed Central |
Methods | EM (single particle) |
Resolution | 4.0 - 5.0 Å |
Structure data | EMDB-23919, PDB-7mo7: EMDB-23920, PDB-7mo8: EMDB-23921, PDB-7mo9: EMDB-23922, PDB-7moa: EMDB-23923, PDB-7mob: |
Source |
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Keywords | SIGNALING PROTEIN / c-MET / HGF / receptor tyrosine kinase |