National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R01GM121772
United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R01GM107214
United States
Citation
Journal: Nat Struct Mol Biol / Year: 2022 Title: Structural basis for Parkinson's disease-linked LRRK2's binding to microtubules. Authors: David M Snead / Mariusz Matyszewski / Andrea M Dickey / Yu Xuan Lin / Andres E Leschziner / Samara L Reck-Peterson / Abstract: Leucine-rich repeat kinase 2 (LRRK2) is one of the most commonly mutated genes in familial Parkinson's disease (PD). Under some circumstances, LRRK2 co-localizes with microtubules in cells, an ...Leucine-rich repeat kinase 2 (LRRK2) is one of the most commonly mutated genes in familial Parkinson's disease (PD). Under some circumstances, LRRK2 co-localizes with microtubules in cells, an association enhanced by PD mutations. We report a cryo-EM structure of the catalytic half of LRRK2, containing its kinase, in a closed conformation, and GTPase domains, bound to microtubules. We also report a structure of the catalytic half of LRRK1, which is closely related to LRRK2 but is not linked to PD. Although LRRK1's structure is similar to that of LRRK2, we find that LRRK1 does not interact with microtubules. Guided by these structures, we identify amino acids in LRRK2's GTPase that mediate microtubule binding; mutating them disrupts microtubule binding in vitro and in cells, without affecting LRRK2's kinase activity. Our results have implications for the design of therapeutic LRRK2 kinase inhibitors.
Details: This is the final dilution buffer. The incubation buffer consisted of 1x BRB80, 10% glycerol, 1mM DTT, 1mM GTP, 1mM MgCl2, 10 uM taxol, and 5 uM MLi-2. Sample was diluted 3-fold right before ...Details: This is the final dilution buffer. The incubation buffer consisted of 1x BRB80, 10% glycerol, 1mM DTT, 1mM GTP, 1mM MgCl2, 10 uM taxol, and 5 uM MLi-2. Sample was diluted 3-fold right before freezing with the final buffer.
Grid
Model: Homemade / Material: COPPER / Mesh: 300 / Support film - Material: CARBON / Support film - topology: LACEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 45 sec. Details: EMS LC-300 lacey grid used (not homemade, but can't choose EMS as the manufacturer)
4.5 uM of LRRK2RCKW (I2020T) was allowed to incubate with 2.25 uM of tubulin dimer, causing both to co-polymerize. 5 uM of MLi-2 was present as well. The sample was diluted 3-fold right before freezing (1.5 uM LRRK2RCKW concentration final).
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Electron microscopy
Microscope
FEI TALOS ARCTICA
Image recording
Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: COUNTING / Number grids imaged: 2 / Average exposure time: 10.0 sec. / Average electron dose: 55.0 e/Å2 / Details: 250 ms frames
Electron beam
Acceleration voltage: 200 kV / Electron source: FIELD EMISSION GUN
Model: Talos Arctica / Image courtesy: FEI Company
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Image processing
Particle selection
Number selected: 557577 Details: Filament Autopicker with templates created by manual picking. This is before symmetry expansion.
Startup model
Type of model: NONE Details: Featureless cylinder for the original helical reconstruction, then subunit from the helical reconstruction after reboxing and symmetry expansion.
Final reconstruction
Applied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 5.0 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC (ver. 3.2) Software - details: local refinement, with non-uniform refinement turned off Number images used: 99854
Initial angle assignment
Type: NOT APPLICABLE
Final angle assignment
Type: NOT APPLICABLE
FSC plot (resolution estimation)
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Atomic model buiding 1
Details
Used AlphaFold model as initial model (Q5S007) using only the ROC domain. TUB1 was added to the initial refinement to prevent ROC model from entering density reserved for the microtubule. TUB1 was discarded after the initial refinement.
Refinement
Protocol: FLEXIBLE FIT
Output model
PDB-7thz: Structure of Leucine Rich Repeat Kinase 2's ROC domain interacting with the microtubule facing the plus end
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