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The crystal structure of mouse LC3B in complex with the FYCO1 LIR reveals the importance of the flanking region of the LIR motif

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INT UNION CRYSTALLOGRAPHY
DOI: 10.1107/S2053230X17001911

关键词

autophagy; FYCO1; LC3; LC3-interacting region (LIR) motif

资金

  1. Japanese Ministry of Education, Culture, Sports, Science and Technology
  2. Takeda Science Foundation
  3. Mochida Memorial Foundation for Medical and Pharmaceutical Research
  4. Daiichi Sankyo Foundation of Life Science
  5. Naito Foundation
  6. Grants-in-Aid for Scientific Research [15H02492, 26711002, 15K14471] Funding Source: KAKEN

向作者/读者索取更多资源

FYVE and coiled-coil domain-containing protein 1 (FYCO1), a multidomain autophagy adaptor protein, mediates microtubule plus-end-directed autophagosome transport by interacting with kinesin motor proteins and with the autophagosomal membrane components microtubule-associated protein 1 light chain 3 (LC3), Rab7 and phosphatidylinositol 3-phosphate (PI3P). To establish the structural basis for the recognition of FYCO1 by LC3, the crystal structure of mouse LC3B in complex with the FYCO1 LC3-interacting region (LIR) motif peptide was determined. Structural analysis showed that the flanking sequences N-terminal and C-terminal to the LIR core sequence of FYCO1, as well as the tetrapeptide core sequence, were specifically recognized by LC3B and contributed to the binding. Moreover, comparisons of related structures revealed a conserved mechanism of FYCO1 recognition by different LC3 isoforms among different species.

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