Science Advances

This PDF file includes:

• Fig. S1. KR2 ion uptake pore.
• Fig. S2. Comparison of orientations and cavities inside different KR2 structures.
• Fig. S3. Comparison of extracellular regions of different KR2 structures.
• Fig. S4. Activity tests of KR2 potassium-pumping mutants.
• Fig. S5. Structural alignment of potassium-pumping KR2 mutants with the model of wild-type protein.
• Fig. S6. Structures of potassium-pumping KR2 mutants.
• Fig. S7. KR2 crystal soaking.
• Fig. S8. KR2 dry and wet forms.
• Fig. S9. Activity tests of KR2 at different pH.
• Fig. S10. Electron density maps of KR2 structures.
• Table S1. Summary information of crystal structures obtained.
• Table S2. Data collection and refinement statistics of the wild-type KR2.
• Table S3. Data collection and refinement statistics of KR2 mutants.
• Table S4. Distance between Asp¹¹⁶ oxygen and RSB nitrogen atoms in KR2 models.

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