6E7B

13-pf 3-start GMPCPP-human alpha1B/beta3 microtubules


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.5 Å
  • Aggregation State: HELICAL ARRAY 
  • Reconstruction Method: HELICAL 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Human beta-Tubulin Isotypes Can Regulate Microtubule Protofilament Number and Stability.

Ti, S.C.Alushin, G.M.Kapoor, T.M.

(2018) Dev. Cell 47: 175

  • DOI: 10.1016/j.devcel.2018.08.014
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Cell biological studies have shown that protofilament number, a fundamental feature of microtubules, can correlate with the expression of different tubulin isotypes. However, it is not known if tubulin isotypes directly control this basic microtubule ...

    Cell biological studies have shown that protofilament number, a fundamental feature of microtubules, can correlate with the expression of different tubulin isotypes. However, it is not known if tubulin isotypes directly control this basic microtubule property. Here, we report high-resolution cryo-EM reconstructions (3.5-3.65 Å) of purified human α1B/β3 and α1B/β2B microtubules and find that the β-tubulin isotype can determine protofilament number. Comparisons of atomic models of 13- and 14-protofilament microtubules reveal how tubulin subunit plasticity, manifested in "accordion-like" distributed structural changes, can accommodate distinct lattice organizations. Furthermore, compared to α1B/β3 microtubules, α1B/β2B filaments are more stable to passive disassembly and against depolymerization by MCAK or chTOG, microtubule-associated proteins with distinct mechanisms of action. Mixing tubulin isotypes in different proportions results in microtubules with protofilament numbers and stabilities intermediate to those of isotypically pure filaments. Together, our findings indicate that microtubule protofilament number and stability can be controlled through β-tubulin isotype composition.


    Organizational Affiliation

    Laboratory of Chemistry and Cell Biology, The Rockefeller University, 1230 York Avenue, New York, NY 10065, USA. Electronic address: kapoor@rockefeller.edu.,Laboratory of Chemistry and Cell Biology, The Rockefeller University, 1230 York Avenue, New York, NY 10065, USA.,Laboratory of Structural Biophysics and Mechanobiology, The Rockefeller University, 1230 York Avenue, New York, NY 10065, USA. Electronic address: galushin@rockefeller.edu.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Tubulin beta-3 chain
B
426Homo sapiensMutation(s): 0 
Gene Names: TUBB3 (TUBB4)
Find proteins for Q13509 (Homo sapiens)
Go to Gene View: TUBB3
Go to UniProtKB:  Q13509
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Tubulin alpha-1B chain
A
437Homo sapiensMutation(s): 0 
Gene Names: TUBA1B
Find proteins for P68363 (Homo sapiens)
Go to Gene View: TUBA1B
Go to UniProtKB:  P68363
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GTP
Query on GTP

Download SDF File 
Download CCD File 
A
GUANOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O14 P3
XKMLYUALXHKNFT-UUOKFMHZSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A, B
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
G2P
Query on G2P

Download SDF File 
Download CCD File 
B
PHOSPHOMETHYLPHOSPHONIC ACID GUANYLATE ESTER
C11 H18 N5 O13 P3
GXTIEXDFEKYVGY-KQYNXXCUSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.5 Å
  • Aggregation State: HELICAL ARRAY 
  • Reconstruction Method: HELICAL 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Human Genome Research InstituteUnited StatesGM65933
National Institutes of Health/National Human Genome Research InstituteUnited States7DP5OD017885

Revision History 

  • Version 1.0: 2018-10-10
    Type: Initial release
  • Version 1.1: 2018-11-07
    Type: Data collection, Database references, Structure summary