Crystal Structure of a RuBisCO-like Protein rlp2 from Rhodopseudomonas palustris

Experimental Data Snapshot

  • Resolution: 3.30 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.204 

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Function, structure, and evolution of the RubisCO-like proteins and their RubisCO homologs.

Tabita, F.R.Hanson, T.E.Li, H.Satagopan, S.Singh, J.Chan, S.

(2007) Microbiol Mol Biol Rev 71: 576-599

  • DOI: https://doi.org/10.1128/MMBR.00015-07
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    About 30 years have now passed since it was discovered that microbes synthesize RubisCO molecules that differ from the typical plant paradigm. RubisCOs of forms I, II, and III catalyze CO(2) fixation reactions, albeit for potentially different physiological purposes, while the RubisCO-like protein (RLP) (form IV RubisCO) has evolved, thus far at least, to catalyze reactions that are important for sulfur metabolism. RubisCO is the major global CO(2) fixation catalyst, and RLP is a somewhat related protein, exemplified by the fact that some of the latter proteins, along with RubisCO, catalyze similar enolization reactions as a part of their respective catalytic mechanisms. RLP in some organisms catalyzes a key reaction of a methionine salvage pathway, while in green sulfur bacteria, RLP plays a role in oxidative thiosulfate metabolism. In many organisms, the function of RLP is unknown. Indeed, there now appear to be at least six different clades of RLP molecules found in nature. Consideration of the many RubisCO (forms I, II, and III) and RLP (form IV) sequences in the database has subsequently led to a coherent picture of how these proteins may have evolved, with a form III RubisCO arising from the Methanomicrobia as the most likely ultimate source of all RubisCO and RLP lineages. In addition, structure-function analyses of RLP and RubisCO have provided information as to how the active sites of these proteins have evolved for their specific functions.

  • Organizational Affiliation

    Department of Microbiology, The Ohio State University, 484 West 12th Avenue, Columbus, OH 43210-1292, USA. Tabita.1@osu.edu

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Ribulose bisphosphate carboxylase-like protein 2
A, B, C, D
452Rhodopseudomonas palustris CGA009Mutation(s): 0 
Gene Names: rlp2
Find proteins for Q6ND47 (Rhodopseudomonas palustris (strain ATCC BAA-98 / CGA009))
Explore Q6ND47 
Go to UniProtKB:  Q6ND47
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ6ND47
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 3.30 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.204 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 68.662α = 90
b = 119.529β = 90
c = 203.04γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-09-11
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Source and taxonomy, Version format compliance
  • Version 1.2: 2023-08-30
    Changes: Data collection, Database references, Refinement description