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Crystal structure of PfRh5, an essential P. falciparum ligand for invasion of human erythrocytes.

Lin Chen | Yibin Xu | Julie Healer | Jenny K Thompson | Brian J Smith | Michael C Lawrence | Alan F Cowman
eLife | 2014

Plasmodium falciparum causes the most severe form of malaria in humans and is responsible for over 700,000 deaths annually. It is an obligate intracellular parasite and invades erythrocytes where it grows in a relatively protected niche. Invasion of erythrocytes is essential for parasite survival and this involves interplay of multiple protein–protein interactions. One of the most important interactions is binding of parasite invasion ligand families EBLs and PfRhs to host receptors on the surface of erythrocytes. PfRh5 is the only essential invasion ligand within the PfRh family and is an important vaccine candidate. PfRh5 binds the host receptor basigin. In this study, we have determined the crystal structure of PfRh5 using diffraction data to 2.18 Å resolution. PfRh5 exhibits a novel fold, comprising nine mostly anti-parallel α-helices encasing an N-terminal β-hairpin, with the overall shape being an elliptical disk. This is the first three-dimensional structure determined for the PfRh family of proteins. DOI: http://dx.doi.org/10.7554/eLife.04187.001

Pubmed ID: 25296023

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Research Collaboratory for Structural Bioinformatics Protein Data Bank (RCSB PDB) (tool)

RRID:SCR_012820

Collection of structural data of biological macromolecules. Database of information about 3D structures of large biological molecules, including proteins and nucleic acids. Users can perform queries on data and analyze and visualize results.

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Coot (tool)

RRID:SCR_014222

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Phenix (tool)

RRID:SCR_014224

A Python-based software suite for the automated determination of molecular structures using X-ray crystallography and other methods. Phenix includes programs for assessing data quality, experimental phasing, molecular replacement, model building, structure refinement, and validation. It also includes tools for reflection data and creating maps and models. Phenix can also be used for neutron crystallography. Tutorials and examples are available in the documentation tab.

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