2XRP

Human Doublecortin N-DC Repeat (1MJD) and Mammalian Tubulin (1JFF and 3HKE) Docked into the 8-Angstrom Cryo-EM Map of Doublecortin- Stabilised Microtubules


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 8.20 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report



Literature

Template-Free 13-Protofilament Microtubule-Map Assembly Visualized at 8 A Resolution.

Fourniol, F.J.Sindelar, C.V.Amigues, B.Clare, D.K.Thomas, G.Perderiset, M.Francis, F.Houdusse, A.Moores, C.A.

(2010) J Cell Biol 191: 463

  • DOI: 10.1083/jcb.201007081
  • Primary Citation of Related Structures:  
    2XRP

  • PubMed Abstract: 
  • Microtubule-associated proteins (MAPs) are essential for regulating and organizing cellular microtubules (MTs). However, our mechanistic understanding of MAP function is limited by a lack of detailed structural information. Using cryo-electron microscopy ...

    Microtubule-associated proteins (MAPs) are essential for regulating and organizing cellular microtubules (MTs). However, our mechanistic understanding of MAP function is limited by a lack of detailed structural information. Using cryo-electron microscopy and single particle algorithms, we solved the 8 Å structure of doublecortin (DCX)-stabilized MTs. Because of DCX's unusual ability to specifically nucleate and stabilize 13-protofilament MTs, our reconstruction provides unprecedented insight into the structure of MTs with an in vivo architecture, and in the absence of a stabilizing drug. DCX specifically recognizes the corner of four tubulin dimers, a binding mode ideally suited to stabilizing both lateral and longitudinal lattice contacts. A striking consequence of this is that DCX does not bind the MT seam. DCX binding on the MT surface indirectly stabilizes conserved tubulin-tubulin lateral contacts in the MT lumen, operating independently of the nucleotide bound to tubulin. DCX's exquisite binding selectivity uncovers important insights into regulation of cellular MTs.


    Organizational Affiliation

    Institute of Structural and Molecular Biology, Birkbeck College, London, England, UK.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
TUBULIN BETA-2B CHAIN ACEG445Bos taurusMutation(s): 0 
Gene Names: TUBB2B
EC: 3.6.5.6
Find proteins for Q6B856 (Bos taurus)
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Go to UniProtKB:  Q6B856
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
TUBULIN ALPHA-1D CHAIN BDFH452Bos taurusMutation(s): 0 
Gene Names: TUBA1D
EC: 3.6.5.6
Find proteins for Q2HJ86 (Bos taurus)
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Go to UniProtKB:  Q2HJ86
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
NEURONAL MIGRATION PROTEIN DOUBLECORTIN I95Homo sapiensMutation(s): 0 
Gene Names: DCXDBCNLISX
Find proteins for O43602 (Homo sapiens)
Explore O43602 
Go to UniProtKB:  O43602
NIH Common Fund Data Resources
PHAROS:  O43602
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 8.20 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-11-24
    Type: Initial release
  • Version 1.1: 2012-03-21
    Changes: Other, Version format compliance
  • Version 2.0: 2017-08-23
    Changes: Atomic model, Data collection, Refinement description