7MRW

Native RhopH complex of the malaria parasite Plasmodium falciparum

  • Classification: MEMBRANE PROTEIN
  • Organism(s): Plasmodium falciparum NF54
  • Mutation(s): No 

  • Deposited: 2021-05-10 Released: 2021-09-15 
  • Deposition Author(s): Ho, C.M., Jih, J., Lai, M., Li, X.R., Goldberg, D.E., Beck, J.R., Zhou, Z.H.
  • Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS), National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID), National Institutes of Health/National Institute of Dental and Craniofacial Research (NIH/NIDCR), National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI), National Institutes of Health/National Center for Research Resources (NIH/NCRR), National Institutes of Health/Office of the Director, National Science Foundation (NSF, United States)

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.72 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

Native structure of the RhopH complex, a key determinant of malaria parasite nutrient acquisition.

Ho, C.M.Jih, J.Lai, M.Li, X.Goldberg, D.E.Beck, J.R.Zhou, Z.H.

(2021) Proc Natl Acad Sci U S A 118

  • DOI: 10.1073/pnas.2100514118
  • Primary Citation of Related Structures:  
    7MRW

  • PubMed Abstract: 
  • The RhopH complex is implicated in malaria parasites' ability to invade and create new permeability pathways in host erythrocytes, but its mechanisms remain poorly understood. Here, we enrich the endogenous RhopH complex in a native soluble form, comprising RhopH2, CLAG3 ...

    The RhopH complex is implicated in malaria parasites' ability to invade and create new permeability pathways in host erythrocytes, but its mechanisms remain poorly understood. Here, we enrich the endogenous RhopH complex in a native soluble form, comprising RhopH2, CLAG3.1, and RhopH3, directly from parasite cell lysates and determine its atomic structure using cryo-electron microscopy (cryo-EM), mass spectrometry, and the cryoID program. CLAG3.1 is positioned between RhopH2 and RhopH3, which both share substantial binding interfaces with CLAG3.1 but make minimal contacts with each other. The forces stabilizing individual subunits include 13 intramolecular disulfide bonds. Notably, CLAG3.1 residues 1210 to 1223, previously predicted to constitute a transmembrane helix, are embedded within a helical bundle formed by residues 979 to 1289 near the C terminus of CLAG3.1. Buried in the core of the RhopH complex and largely shielded from solvent, insertion of this putative transmembrane helix into the erythrocyte membrane would likely require a large conformational rearrangement. Given the unusually high disulfide content of the complex, it is possible that such a rearrangement could be initiated by the breakage of allosteric disulfide bonds, potentially triggered by interactions at the erythrocyte membrane. This first direct observation of an exported Plasmodium falciparum transmembrane protein-in a soluble, trafficking state and with atomic details of buried putative membrane-insertion helices-offers insights into the assembly and trafficking of RhopH and other parasite-derived complexes to the erythrocyte membrane. Our study demonstrates the potential the endogenous structural proteomics approach holds for elucidating the molecular mechanisms of hard-to-isolate complexes in their native, functional forms.


    Organizational Affiliation

    California NanoSystems Institute, University of California, Los Angeles, CA 90095; chi-min.ho@columbia.edu Hong.Zhou@UCLA.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Cytoadherence linked asexual protein 3.1A1417Plasmodium falciparum NF54Mutation(s): 0 
Gene Names: CK202_3849
UniProt
Find proteins for A0A2I0BTS3 (Plasmodium falciparum (isolate NF54))
Explore A0A2I0BTS3 
Go to UniProtKB:  A0A2I0BTS3
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 falciparum NF54Mutation(s): 0 
Gene Names: CK202_4006
UniProt
Find proteins for A0A2I0BSI4 (Plasmodium falciparum (isolate NF54))
Explore A0A2I0BSI4 
Go to UniProtKB:  A0A2I0BSI4
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 falciparum NF54Mutation(s): 0 
Gene Names: CK202_3967PFNF54_02468
UniProt
Find proteins for W7JUX6 (Plasmodium falciparum (isolate NF54))
Explore W7JUX6 
Go to UniProtKB:  W7JUX6
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.72 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report




Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR01GM071940
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesAI094386
National Institutes of Health/National Institute of Dental and Craniofacial Research (NIH/NIDCR)United StatesDE025567
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)United StatesK99/R00 HL133453
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesAI007323
National Institutes of Health/National Center for Research Resources (NIH/NCRR)United StatesS10RR23057
National Institutes of Health/Office of the DirectorUnited StatesS10OD018111
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesU24GM116792
National Science Foundation (NSF, United States)United StatesDBI-1338135
National Science Foundation (NSF, United States)United StatesDMR-1548924

Revision History  (Full details and data files)

  • Version 1.0: 2021-09-15
    Type: Initial release