6XHJ

Cryo-EM structure of octadecameric TF55 (beta-only) complex from S. solfataricus bound to ATP

• PDB DOI: https://doi.org/10.2210/pdb6XHJ/pdb
• EM Map EMD-22187: EMDB EMDataResource

• Classification: CHAPERONE
• Organism(s): Saccharolobus solfataricus P2
• Mutation(s): No 


• Deposited: 2020-06-18 Released: 2021-03-17 
• Deposition Author(s): Zeng, Y.C., Sobti, M., Stewart, A.G.
• Funding Organization(s): National Health and Medical Research Council (NHMRC, Australia)

---

Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.62 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Structural analysis of the Sulfolobus solfataricus TF55beta chaperonin by cryo-electron microscopy

Zeng, Y.C., Sobti, M., Stewart, A.G.

(2021) Acta Crystallogr F Struct Biol Commun 77: 79-84

• DOI: https://doi.org/10.1107/S2053230X21002223

Biological Assembly 1  

Global Symmetry: Dihedral - D9  (Explore in 3D)
Global Stoichiometry: Homo 18-mer - A18 

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

Biological Assembly Evidence: gel filtration

Macromolecule Content

• Total Structure Weight: 60.57 kDa 
• Atom Count: 3,368 
• Modelled Residue Count: 473 
• Deposited Residue Count: 554 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Thermosome subunit beta	A	554	Saccharolobus solfataricus P2	Mutation(s): 0
UniProt
Find proteins for Q9V2T8 (Saccharolobus solfataricus (strain ATCC 35092 / DSM 1617 / JCM 11322 / P2)) Explore Q9V2T8  Go to UniProtKB:  Q9V2T8

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ATP	C [auth A]	ADENOSINE-5'-TRIPHOSPHATE C10 H16 N5 O13 P3 ZKHQWZAMYRWXGA-KQYNXXCUSA-N
MG	B [auth A]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.62 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
RECONSTRUCTION	cryoSPARC	2.12.0
MODEL REFINEMENT	PHENIX
MODEL REFINEMENT	ISOLDE

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2021-03-17 
Deposition Author(s): Zeng, Y.C., Sobti, M., Stewart, A.G.

---

Funding Organization	Location	Grant Number
National Health and Medical Research Council (NHMRC, Australia)	Australia	APP1159347
National Health and Medical Research Council (NHMRC, Australia)	Australia	APP1146403

Revision History  

• Version 1.0: 2021-03-17
  Type: Initial release
  
• Version 1.1: 2024-03-06
  Changes: Data collection, Database references, Derived calculations, Refinement description