6E11

PTEX Core Complex in the Resetting (Compact) State

  • Classification: PROTEIN TRANSPORT
  • Organism(s): Plasmodium falciparum 3D7
  • Mutation(s): No 

  • Deposited: 2018-07-08 Released: 2018-08-22 
  • Deposition Author(s): Ho, C., Lai, M., Zhou, Z.H.
  • Funding Organization(s): National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID), National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS), 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: 4.23 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Malaria parasite translocon structure and mechanism of effector export.

Ho, C.M.Beck, J.R.Lai, M.Cui, Y.Goldberg, D.E.Egea, P.F.Zhou, Z.H.

(2018) Nature 561: 70-75

  • DOI: 10.1038/s41586-018-0469-4
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The putative Plasmodium translocon of exported proteins (PTEX) is essential for transport of malarial effector proteins across a parasite-encasing vacuolar membrane into host erythrocytes, but the mechanism of this process remains unknown. Here we sh ...

    The putative Plasmodium translocon of exported proteins (PTEX) is essential for transport of malarial effector proteins across a parasite-encasing vacuolar membrane into host erythrocytes, but the mechanism of this process remains unknown. Here we show that PTEX is a bona fide translocon by determining structures of the PTEX core complex at near-atomic resolution using cryo-electron microscopy. We isolated the endogenous PTEX core complex containing EXP2, PTEX150 and HSP101 from Plasmodium falciparum in the 'engaged' and 'resetting' states of endogenous cargo translocation using epitope tags inserted using the CRISPR-Cas9 system. In the structures, EXP2 and PTEX150 interdigitate to form a static, funnel-shaped pseudo-seven-fold-symmetric protein-conducting channel spanning the vacuolar membrane. The spiral-shaped AAA+ HSP101 hexamer is tethered above this funnel, and undergoes pronounced compaction that allows three of six tyrosine-bearing pore loops lining the HSP101 channel to dissociate from the cargo, resetting the translocon for the next threading cycle. Our work reveals the mechanism of P. falciparum effector export, and will inform structure-based design of drugs targeting this unique translocon.


    Organizational Affiliation

    California NanoSystems Institute, University of California, Los Angeles, CA, USA. hong.zhou@UCLA.edu.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Unknown (Claw)
h, i, j, k, l, m, n
60Plasmodium falciparum 3D7Mutation(s): 0 
Protein Feature View
  • Reference Sequence

Find similar proteins by: Sequence  |  Structure

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Heat shock protein 101
1, 2, 3, 4, 5, 6
906Plasmodium falciparum 3D7Mutation(s): 0 
Gene Names: PF3D7_1116800
Find proteins for Q8IIJ8 (Plasmodium falciparum (isolate 3D7))
Go to UniProtKB:  Q8IIJ8
Protein Feature View
  • Reference Sequence

Find similar proteins by: Sequence  |  Structure

Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Exported protein 2
A, B, C, D, E, F, G
287Plasmodium falciparum 3D7Mutation(s): 0 
Gene Names: PF3D7_1471100
Find proteins for Q8IKC8 (Plasmodium falciparum (isolate 3D7))
Go to UniProtKB:  Q8IKC8
Protein Feature View
  • Reference Sequence
  • Find similar proteins by: Sequence   |   Structure
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Endogenous cargo polypeptide
0
6Plasmodium falciparum 3D7Mutation(s): 0 
Protein Feature View
  • Reference Sequence

Find similar proteins by: Sequence  |  Structure

Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
Translocon component PTEX150
a, b, c, d, e, f, g
993Plasmodium falciparum 3D7Mutation(s): 0 
Gene Names: PF3D7_1436300
Find proteins for Q8ILA1 (Plasmodium falciparum (isolate 3D7))
Go to UniProtKB:  Q8ILA1
Protein Feature View
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
AGS
Query on AGS

Download CCD File 
1, 2, 3, 4, 5, 6
PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER
C10 H16 N5 O12 P3 S
NLTUCYMLOPLUHL-KQYNXXCUSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.23 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 Allergy and Infectious Diseases (NIH/NIAID)United StatesR01 AI094386
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR01 GM071940
National Institutes of Health/National Institute of Dental and Craniofacial Research (NIH/NIDCR)United StatesR01 DE025567
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 StatesT32 AI007323
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
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesR21 AI125983

Revision History 

  • Version 1.0: 2018-08-22
    Type: Initial release
  • Version 1.1: 2018-09-12
    Changes: Data collection, Database references
  • Version 1.2: 2019-11-27
    Changes: Author supporting evidence