9MUR | pdb_00009mur

Cryo-EM structure of Rubisco from Arabidopsis thaliana with the 2B small subunit isoform

• PDB DOI: https://doi.org/10.2210/pdb9MUR/pdb
• EM Map EMD-48648: EMDB EMDataResource

• Classification: PHOTOSYNTHESIS
• Organism(s): Arabidopsis thaliana
• Expression System: Escherichia coli 'BL21-Gold(DE3)pLysS AG
• Mutation(s): No 


• Deposited: 2025-01-14 Released: 2026-01-21 
• Deposition Author(s): Ceminsky, M., Askey, B., Gunn, L.H.
• Funding Organization(s): Carl Trygger Foundation, National Science Foundation (NSF, United States)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 2.48 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Starting Model: experimental

Literature

Rubisco kinetic acclimation at the holoenzyme level

Askey, B., Ceminsky, M., Scott, E., Azinas, S., Oh, Z.G., Laganowsky, A., Gunn, L.H.

To be published.

Biological Assembly 1  

Global Symmetry: Dihedral - D4  (Explore in 3D)
Global Stoichiometry: Hetero 16-mer - A8B8 

Biological assembly 1 assigned by authors and generated by (software)

Biological Assembly Evidence: electron microscopy, native gel electrophoresis

Macromolecule Content 

• Total Structure Weight: 549.32 kDa 
• Atom Count: 34,912 
• Modeled Residue Count: 4,408 
• Deposited Residue Count: 4,888 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Ribulose bisphosphate carboxylase large chain	A, B, C, D, E, F, G, H	479	Arabidopsis thaliana	Mutation(s): 0  Gene Names: rbcL, AtCg00490 EC: 4.1.1.39
UniProt
Find proteins for O03042 (Arabidopsis thaliana) Explore O03042  Go to UniProtKB:  O03042

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Ribulose bisphosphate carboxylase small subunit 2B, chloroplastic	I, J, K, L, M, N, O, P	132	Arabidopsis thaliana	Mutation(s): 0  Gene Names: RBCS-2B, ATS2B, At5g38420, MXI10.14
UniProt
Find proteins for P10797 (Arabidopsis thaliana) Explore P10797  Go to UniProtKB:  P10797

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 2.48 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
RECONSTRUCTION	cryoSPARC	4.3.1
MODEL REFINEMENT	PHENIX	1.21.1_5286

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2026-01-21 
Deposition Author(s): Ceminsky, M., Askey, B., Gunn, L.H.

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Funding Organization	Location	Grant Number
Carl Trygger Foundation	Sweden	--
National Science Foundation (NSF, United States)	United States	DGE-2139899

Revision History  

• Version 1.0: 2026-01-21
  Type: Initial release