3RG6

Crystal structure of a chaperone-bound assembly intermediate of form I Rubisco


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.216 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

Crystal structure of a chaperone-bound assembly intermediate of form I Rubisco.

Bracher, A.Starling-Windhof, A.Hartl, F.U.Hayer-Hartl, M.

(2011) Nat.Struct.Mol.Biol. 18: 875-880

  • DOI: 10.1038/nsmb.2090

  • PubMed Abstract: 
  • The form I Rubisco of autotrophic bacteria, algae and plants is a complex of eight large (RbcL) and eight small (RbcS) subunits. It fixes atmospheric CO(2) in the dark reaction of photosynthesis. As shown for the cyanobacterial enzyme, folding of the ...

    The form I Rubisco of autotrophic bacteria, algae and plants is a complex of eight large (RbcL) and eight small (RbcS) subunits. It fixes atmospheric CO(2) in the dark reaction of photosynthesis. As shown for the cyanobacterial enzyme, folding of the RbcL subunits is mediated by the GroEL-GroES chaperonin system, and assembly requires the specialized chaperone RbcX, a homodimer of ~15-kDa subunits. Here we present the 3.2-Å crystal structure of a Rubisco assembly intermediate, consisting of the RbcL(8) core with eight RbcX(2) molecules bound. The structure reveals the molecular mechanism by which RbcX(2) mediates oligomeric assembly. Specifically, RbcX(2) provides positional information for proper formation of antiparallel RbcL dimers, thereby preventing RbcL-RbcL misalignment and off-pathway aggregation. The RbcL(8)(RbcX(2))(8) structure also suggests that RbcS functions by stabilizing the '60s loop' of RbcL in the catalytically active conformation.


    Related Citations: 
    • Structure determination and refinement of ribulose 1,5-bisphosphate carboxylase/oxygenase from Synechococcus PCC6301.
      Newman, J.,Branden, C.I.,Jones, T.A.
      (1993) Acta Crystallogr.,Sect.D 49: 548
    • Structure and function of RbcX, an assembly chaperone for hexadecameric Rubisco.
      Saschenbrecker, S.,Bracher, A.,Rao, K.V.,Rao, B.V.,Hartl, F.U.,Hayer-Hartl, M.
      (2007) Cell 129: 1189
    • Coupled chaperone action in folding and assembly of hexadecameric Rubisco.
      Liu, C.,Young, A.L.,Starling-Windhof, A.,Bracher, A.,Saschenbrecker, S.,Rao, B.V.,Rao, K.V.,Berninghausen, O.,Mielke, T.,Hartl, F.U.,Beckmann, R.,Hayer-Hartl, M.
      (2010) Nature 463: 197


    Organizational Affiliation

    Department of Cellular Biochemistry, Max Planck Institute of Biochemistry, Martinsried, Germany. bracher@biochem.mpg.de




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Ribulose bisphosphate carboxylase large chain
A, B
472Synechococcus sp. (strain ATCC 27144 / PCC 6301 / SAUG 1402/1)Gene Names: cbbL (rbcA, rbcL)
EC: 4.1.1.39
Find proteins for P00880 (Synechococcus sp. (strain ATCC 27144 / PCC 6301 / SAUG 1402/1))
Go to UniProtKB:  P00880
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
RbcX protein
C, D, E, F
155Anabaena spGene Names: rbcX
Find proteins for Q44212 (Anabaena sp)
Go to UniProtKB:  Q44212
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.216 
  • Space Group: I 4
Unit Cell:
Length (Å)Angle (°)
a = 244.750α = 90.00
b = 244.750β = 90.00
c = 99.669γ = 90.00
Software Package:
Software NamePurpose
MOLREPphasing
SCALAdata scaling
PDB_EXTRACTdata extraction
REFMACrefinement
ADSCdata collection
XSCALEdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-07-20
    Type: Initial release
  • Version 1.1: 2011-08-03
    Type: Database references
  • Version 1.2: 2011-08-17
    Type: Database references
  • Version 1.3: 2014-07-16
    Type: Other
  • Version 1.4: 2017-10-25
    Type: Author supporting evidence