5M50

Mechanism of microtubule minus-end recognition and protection by CAMSAP proteins


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 5.30 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

A structural model for microtubule minus-end recognition and protection by CAMSAP proteins.

Atherton, J.Jiang, K.Stangier, M.M.Luo, Y.Hua, S.Houben, K.van Hooff, J.J.E.Joseph, A.P.Scarabelli, G.Grant, B.J.Roberts, A.J.Topf, M.Steinmetz, M.O.Baldus, M.Moores, C.A.Akhmanova, A.

(2017) Nat Struct Mol Biol 24: 931-943

  • DOI: https://doi.org/10.1038/nsmb.3483
  • Primary Citation of Related Structures:  
    5LZN, 5M50, 5M54, 5M5C

  • PubMed Abstract: 

    CAMSAP and Patronin family members regulate microtubule minus-end stability and localization and thus organize noncentrosomal microtubule networks, which are essential for cell division, polarization and differentiation. Here, we found that the CAMSAP C-terminal CKK domain is widely present among eukaryotes and autonomously recognizes microtubule minus ends. Through a combination of structural approaches, we uncovered how mammalian CKK binds between two tubulin dimers at the interprotofilament interface on the outer microtubule surface. In vitro reconstitution assays combined with high-resolution fluorescence microscopy and cryo-electron tomography suggested that CKK preferentially associates with the transition zone between curved protofilaments and the regular microtubule lattice. We propose that minus-end-specific features of the interprotofilament interface at this site serve as the basis for CKK's minus-end preference. The steric clash between microtubule-bound CKK and kinesin motors explains how CKK protects microtubule minus ends against kinesin-13-induced depolymerization and thus controls the stability of free microtubule minus ends.


  • Organizational Affiliation

    Institute of Structural and Molecular Biology, Birkbeck, University of London, London, UK.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Tubulin alpha chainA [auth D],
C [auth A]
439Bos taurusMutation(s): 0 
UniProt
Find proteins for P81947 (Bos taurus)
Explore P81947 
Go to UniProtKB:  P81947
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP81947
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Tubulin beta-2B chainB [auth E],
D [auth B]
427Bos taurusMutation(s): 0 
UniProt
Find proteins for Q6B856 (Bos taurus)
Explore Q6B856 
Go to UniProtKB:  Q6B856
Entity Groups  
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UniProt GroupQ6B856
Sequence Annotations
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  • Reference Sequence
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Calmodulin-regulated spectrin-associated protein 3E [auth C]118Mus musculusMutation(s): 0 
Gene Names: Camsap3Kiaa1543
UniProt & NIH Common Fund Data Resources
Find proteins for Q80VC9 (Mus musculus)
Explore Q80VC9 
Go to UniProtKB:  Q80VC9
IMPC:  MGI:1916947
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ80VC9
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
TA1
Query on TA1

Download Ideal Coordinates CCD File 
I [auth E],
M [auth B]
TAXOL
C47 H51 N O14
RCINICONZNJXQF-MZXODVADSA-N
GTP
Query on GTP

Download Ideal Coordinates CCD File 
F [auth D],
J [auth A]
GUANOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O14 P3
XKMLYUALXHKNFT-UUOKFMHZSA-N
GDP
Query on GDP

Download Ideal Coordinates CCD File 
H [auth E],
L [auth B]
GUANOSINE-5'-DIPHOSPHATE
C10 H15 N5 O11 P2
QGWNDRXFNXRZMB-UUOKFMHZSA-N
MG
Query on MG

Download Ideal Coordinates CCD File 
G [auth D],
K [auth A]
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
Binding Affinity Annotations 
IDSourceBinding Affinity
TA1 BindingDB:  5M50 EC50: 520 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 5.30 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
European Research CouncilUnited KingdomMR/J000973/1
European Research CouncilUnited KingdomMR/M019292/1
Wellcome TrustUnited Kingdom104196/Z/14/Z
National Institutes of HealthUnited StatesR01GM070862
NWONetherlands718.015.001
Swiss National Science FoundationSwitzerland310030B_138659

Revision History  (Full details and data files)

  • Version 1.0: 2017-10-04
    Type: Initial release
  • Version 1.1: 2017-10-18
    Changes: Database references
  • Version 1.2: 2017-11-15
    Changes: Database references