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


This is version 2.0 of the entry. See complete history. 


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 and single particle algorithms, we solved the 8 Å structure of doublecortin (DCX)-stabilized MTs ...

    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 A, C, E, G445Bos 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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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
TUBULIN ALPHA-1D CHAIN B, D, F, H452Bos 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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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
NEURONAL MIGRATION PROTEIN DOUBLECORTIN I95Homo sapiensMutation(s): 0 
Gene Names: DCX, DBCN, LISX
Find proteins for O43602 (Homo sapiens)
Explore O43602 
Go to UniProtKB:  O43602
NIH Common Fund Data Resources
PHAROS:  O43602
GTEx:  ENSG00000077279
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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

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • 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