Insights into anti-parallel microtubule crosslinking by PRC1, a conserved microtubule binding protein

Experimental Data Snapshot

  • Resolution: 2.00 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.238 
  • R-Value Observed: 0.240 

wwPDB Validation   3D Report Full Report

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Insights into Antiparallel Microtubule Crosslinking by PRC1, a Conserved Nonmotor Microtubule Binding Protein.

Subramanian, R.Wilson-Kubalek, E.M.Arthur, C.P.Bick, M.J.Campbell, E.A.Darst, S.A.Milligan, R.A.Kapoor, T.M.

(2010) Cell 142: 433-443

  • DOI: https://doi.org/10.1016/j.cell.2010.07.012
  • Primary Citation of Related Structures:  
    3NRX, 3NRY

  • PubMed Abstract: 

    Formation of microtubule architectures, required for cell shape maintenance in yeast, directional cell expansion in plants and cytokinesis in eukaryotes, depends on antiparallel microtubule crosslinking by the conserved MAP65 protein family. Here, we combine structural and single molecule fluorescence methods to examine how PRC1, the human MAP65, crosslinks antiparallel microtubules. We find that PRC1's microtubule binding is mediated by a structured domain with a spectrin-fold and an unstructured Lys/Arg-rich domain. These two domains, at each end of a homodimer, are connected by a linkage that is flexible on single microtubules, but forms well-defined crossbridges between antiparallel filaments. Further, we show that PRC1 crosslinks are compliant and do not substantially resist filament sliding by motor proteins in vitro. Together, our data show how MAP65s, by combining structural flexibility and rigidity, tune microtubule associations to establish crosslinks that selectively "mark" antiparallel overlap in dynamic cytoskeletal networks.

  • Organizational Affiliation

    Laboratory of Chemistry and Cell Biology, The Rockefeller University, New York, NY 10065, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Protein regulator of cytokinesis 1130Homo sapiensMutation(s): 0 
Gene Names: PRC1
UniProt & NIH Common Fund Data Resources
Find proteins for O43663 (Homo sapiens)
Explore O43663 
Go to UniProtKB:  O43663
PHAROS:  O43663
GTEx:  ENSG00000198901 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO43663
Sequence Annotations
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
Query on MSE
Experimental Data & Validation

Experimental Data

  • Resolution: 2.00 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.238 
  • R-Value Observed: 0.240 
  • Space Group: P 62
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 51.043α = 90
b = 51.043β = 90
c = 90.347γ = 120
Software Package:
Software NamePurpose
ADSCdata collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-08-25
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2023-12-27
    Changes: Data collection, Database references, Derived calculations