1TUB

TUBULIN ALPHA-BETA DIMER, ELECTRON DIFFRACTION


Experimental Data Snapshot

  • Method: ELECTRON CRYSTALLOGRAPHY
  • Aggregation State: 2D ARRAY 
  • Reconstruction Method: CRYSTALLOGRAPHY 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of the alpha beta tubulin dimer by electron crystallography.

Nogales, E.Wolf, S.G.Downing, K.H.

(1998) Nature 391: 199-203

  • DOI: 10.1038/34465

  • PubMed Abstract: 
  • The alphabeta tubulin heterodimer is the structural subunit of microtubules, which are cytoskeletal elements that are essential for intracellular transport and cell division in all eukaryotes. Each tubulin monomer binds a guanine nucleotide, which is ...

    The alphabeta tubulin heterodimer is the structural subunit of microtubules, which are cytoskeletal elements that are essential for intracellular transport and cell division in all eukaryotes. Each tubulin monomer binds a guanine nucleotide, which is nonexchangeable when it is bound in the alpha subunit, or N site, and exchangeable when bound in the beta subunit, or E site. The alpha- and beta-tubulins share 40% amino-acid sequence identity, both exist in several isotype forms, and both undergo a variety of posttranslational modifications. Limited sequence homology has been found with the proteins FtsZ and Misato, which are involved in cell division in bacteria and Drosophila, respectively. Here we present an atomic model of the alphabeta tubulin dimer fitted to a 3.7-A density map obtained by electron crystallography of zinc-induced tubulin sheets. The structures of alpha- and beta-tubulin are basically identical: each monomer is formed by a core of two beta-sheets surrounded by alpha-helices. The monomer structure is very compact, but can be divided into three functional domains: the amino-terminal domain containing the nucleotide-binding region, an intermediate domain containing the Taxol-binding site, and the carboxy-terminal domain, which probably constitutes the binding surface for motor proteins.


    Related Citations: 
    • Erratum. Structure of the Alpha Beta Tubulin Dimer by Electron Crystallography
      Nogales, E.,Wolf, S.G.,Downing, K.H.
      (1998) Nature 393: 191
    • Tubulin and Ftsz Form a Distinct Family of Gtpases
      Nogales, E.,Downing, K.H.,Amos, L.A.,Lowe, J.
      (1998) Nat.Struct.Mol.Biol. 5: 451


    Organizational Affiliation

    Life Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TUBULIN
A
440Sus scrofaGene Names: TUBA1A
Find proteins for P02550 (Sus scrofa)
Go to Gene View: TUBA1A
Go to UniProtKB:  P02550
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
TUBULIN
B
427Sus scrofaN/A
Find proteins for P02554 (Sus scrofa)
Go to UniProtKB:  P02554
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GDP
Query on GDP

Download SDF File 
Download CCD File 
B
GUANOSINE-5'-DIPHOSPHATE
C10 H15 N5 O11 P2
QGWNDRXFNXRZMB-UUOKFMHZSA-N
 Ligand Interaction
TXL
Query on TXL

Download SDF File 
Download CCD File 
B
TAXOTERE
C43 H53 N O14
ZDZOTLJHXYCWBA-VCVYQWHSSA-N
 Ligand Interaction
GTP
Query on GTP

Download SDF File 
Download CCD File 
A
GUANOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O14 P3
XKMLYUALXHKNFT-UUOKFMHZSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON CRYSTALLOGRAPHY
  • Aggregation State: 2D ARRAY 
  • Reconstruction Method: CRYSTALLOGRAPHY 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-10-07
    Type: Initial release
  • Version 1.1: 2008-03-03
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance