The sodium efflux pump ATP4 is a leading antimalarial target, but suffers from a lack of high-resolution structural information needed to identify functionally important features in conserved regions and guide rational design of next generation inhibitors. Here, we determine a 3.7Å cryoEM structure of ATP4 purified from CRISPR-engineered parasites, revealing a previously unknown, apicomplexan-specific binding partner, ABP, which forms a conserved, likely modulatory interaction with ATP4. The discovery of ABP presents a new avenue for designing novel ATP4 inhibitors.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11888398PMC
http://dx.doi.org/10.1101/2025.02.25.640208DOI Listing

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