7KIY

Plasmodium falciparum RhopH complex in soluble form


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.92 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report



Literature

Malaria parasites use a soluble RhopH complex for erythrocyte invasion and an integral form for nutrient uptake.

Schureck, M.A.Darling, J.E.Merk, A.Shao, J.Daggupati, G.Srinivasan, P.Olinares, P.D.B.Rout, M.P.Chait, B.T.Wollenberg, K.Subramaniam, S.Desai, S.A.

(2021) Elife 10

  • DOI: 10.7554/eLife.65282
  • Primary Citation of Related Structures:  
    7KIY

  • PubMed Abstract: 
  • Malaria parasites use the RhopH complex for erythrocyte invasion and channel-mediated nutrient uptake. As the member proteins are unique to Plasmodium spp., how they interact and traffic through subcellular sites to serve these essential fun ...

    Malaria parasites use the RhopH complex for erythrocyte invasion and channel-mediated nutrient uptake. As the member proteins are unique to Plasmodium spp., how they interact and traffic through subcellular sites to serve these essential functions is unknown. We show that RhopH is synthesized as a soluble complex of CLAG3, RhopH2, and RhopH3 with 1:1:1 stoichiometry. After transfer to a new host cell, the complex crosses a vacuolar membrane surrounding the intracellular parasite and becomes integral to the erythrocyte membrane through a PTEX translocon-dependent process. We present a 2.9 Å single-particle cryo-electron microscopy structure of the trafficking complex, revealing that CLAG3 interacts with the other subunits over large surface areas. This soluble complex is tightly assembled with extensive disulfide bonding and predicted transmembrane helices shielded. We propose a large protein complex stabilized for trafficking but poised for host membrane insertion through large-scale rearrangements, paralleling smaller two-state pore-forming proteins in other organisms.


    Organizational Affiliation

    Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, United States.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Cytoadherence linked asexual protein 3A1505Plasmodium falciparumMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
High molecular weight rhoptry protein-2B1378Plasmodium falciparumMutation(s): 0 
Gene Names: rhoph2
Find proteins for Q8I060 (Plasmodium falciparum)
Explore Q8I060 
Go to UniProtKB:  Q8I060
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
High molecular weight rhoptry protein 3C897Plasmodium falciparumMutation(s): 0 
Find proteins for A0A024X9S2 (Plasmodium falciparum (isolate Camp / Malaysia))
Explore A0A024X9S2 
Go to UniProtKB:  A0A024X9S2
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.92 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United States--

Revision History 

  • Version 1.0: 2021-01-13
    Type: Initial release