7Q8B

Leishmania major actin filament in ADP-Pi state


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.30 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural basis of rapid actin dynamics in the evolutionarily divergent Leishmania parasite.

Kotila, T.Wioland, H.Selvaraj, M.Kogan, K.Antenucci, L.Jegou, A.Huiskonen, J.T.Romet-Lemonne, G.Lappalainen, P.

(2022) Nat Commun 13: 3442-3442

  • DOI: https://doi.org/10.1038/s41467-022-31068-y
  • Primary Citation of Related Structures:  
    7Q8B, 7Q8C, 7Q8S

  • PubMed Abstract: 

    Actin polymerization generates forces for cellular processes throughout the eukaryotic kingdom, but our understanding of the 'ancient' actin turnover machineries is limited. We show that, despite > 1 billion years of evolution, pathogenic Leishmania major parasite and mammalian actins share the same overall fold and co-polymerize with each other. Interestingly, Leishmania harbors a simple actin-regulatory machinery that lacks cofilin 'cofactors', which accelerate filament disassembly in higher eukaryotes. By applying single-filament biochemistry we discovered that, compared to mammalian proteins, Leishmania actin filaments depolymerize more rapidly from both ends, and are severed > 100-fold more efficiently by cofilin. Our high-resolution cryo-EM structures of Leishmania ADP-, ADP-Pi- and cofilin-actin filaments identify specific features at actin subunit interfaces and cofilin-actin interactions that explain the unusually rapid dynamics of parasite actin filaments. Our findings reveal how divergent parasites achieve rapid actin dynamics using a remarkably simple set of actin-binding proteins, and elucidate evolution of the actin cytoskeleton.


  • Organizational Affiliation

    Institute of Biotechnology and Helsinki Institute of Life Science, University of Helsinki, P.O. Box 56, 00014, Helsinki, Finland.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Actin
A, B, C, D, E
376Leishmania majorMutation(s): 0 
Gene Names: ACTLMJF_04_1230
EC: 3.6.4
UniProt
Find proteins for P45520 (Leishmania major)
Explore P45520 
Go to UniProtKB:  P45520
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP45520
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
ADP (Subject of Investigation/LOI)
Query on ADP

Download Ideal Coordinates CCD File 
G [auth A],
J [auth B],
M [auth C],
P [auth D],
S [auth E]
ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
PO4 (Subject of Investigation/LOI)
Query on PO4

Download Ideal Coordinates CCD File 
H [auth A],
K [auth B],
N [auth C],
Q [auth D],
T [auth E]
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
MG (Subject of Investigation/LOI)
Query on MG

Download Ideal Coordinates CCD File 
F [auth A],
I [auth B],
L [auth C],
O [auth D],
R [auth E]
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.30 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONRELION3.1
MODEL REFINEMENTPHENIX1.19.2-4158-000
MODEL REFINEMENTISOLDE1.1.1
MODEL REFINEMENTUCSF ChimeraX1.1.1

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Academy of FinlandFinland320161
Jane and Aatos Erkko FoundationFinland4708679

Revision History  (Full details and data files)

  • Version 1.0: 2022-05-18
    Type: Initial release
  • Version 1.1: 2022-06-29
    Changes: Database references