4HHH image
Deposition Date 2012-10-09
Release Date 2012-10-31
Last Version Date 2024-11-06
Entry Detail
PDB ID:
4HHH
Keywords:
Title:
Structure of Pisum sativum Rubisco
Biological Source:
Source Organism:
Pisum sativum (Taxon ID: 3888)
Method Details:
Experimental Method:
Resolution:
2.20 Å
R-Value Free:
0.27
R-Value Work:
0.19
R-Value Observed:
0.20
Space Group:
P 21 2 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Ribulose bisphosphate carboxylase large chain
Gene (Uniprot):rbcL
Chain IDs:A, B, C, D
Chain Length:475
Number of Molecules:4
Biological Source:Pisum sativum
Polymer Type:polypeptide(L)
Molecule:Ribulose bisphosphate carboxylase small chain
Chain IDs:E (auth: S), F (auth: T), G (auth: U), H (auth: V)
Chain Length:123
Number of Molecules:4
Biological Source:Pisum sativum
Ligand Molecules
Primary Citation
Structure of Pisum sativum Rubisco with bound ribulose 1,5-bisphosphate.
Acta Crystallogr.,Sect.F 69 10 14 (2013)
PMID: 23295478 DOI: 10.1107/S1744309112047549

Abstact

The first structure of a ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) from a pulse crop is reported. Rubisco was purified from Pisum sativum (garden pea) and diffraction-quality crystals were obtained by hanging-drop vapour diffusion in the presence of the substrate ribulose 1,5-bisphosphate. X-ray diffraction data were recorded to 2.20 Å resolution from a single crystal at the Canadian Light Source. The overall quaternary structure of non-activated P. sativum Rubisco highlights the conservation of the form I Rubisco hexadecameric complex. The electron density places the substrate in the active site at the interface of the large-subunit dimers. Lys201 in the active site is not carbamylated as expected for this non-activated structure. Some heterogeneity in the small-subunit sequence is noted, as well as possible variations in the conformation and contacts of ribulose 1,5-bisphosphate in the large-subunit active sites. Overall, the active-site conformation most closely correlates with the `closed' conformation observed in other substrate/inhibitor-bound Rubisco structures.

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