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Structure paper

TitleStructural analysis of the Sulfolobus solfataricus TF55β chaperonin by cryo-electron microscopy.
Journal, issue, pagesActa Crystallogr F Struct Biol Commun, Vol. 77, Issue Pt 3, Page 79-84, Year 2021
Publish dateMar 1, 2021
AuthorsYi Cheng Zeng / Meghna Sobti / Alastair G Stewart /
PubMed AbstractChaperonins are biomolecular complexes that assist in protein folding. Thermophilic factor 55 (TF55) is a group II chaperonin found in the archaeal genus Sulfolobus that has α, β and γ subunits. ...Chaperonins are biomolecular complexes that assist in protein folding. Thermophilic factor 55 (TF55) is a group II chaperonin found in the archaeal genus Sulfolobus that has α, β and γ subunits. Using cryo-electron microscopy, structures of the β-only complex of S. solfataricus TF55 (TF55β) were determined to 3.6-4.2 Å resolution. The structures of the TF55β complexes formed in the presence of ADP or ATP highlighted an open state in which nucleotide exchange can occur before progressing in the refolding cycle.
External linksActa Crystallogr F Struct Biol Commun / PubMed:33682792 / PubMed Central
MethodsEM (single particle)
Resolution3.62 - 5.22 Å
Structure data

EMDB-21211:
Cryo-EM structure of a segment of the TF55 (beta-only) filament from S. solfataricus
Method: EM (single particle) / Resolution: 5.22 Å

22186

6xhi

EMDB-22186, PDB-6xhi:
Cryo-EM structure of octadecameric TF55 (beta-only) complex from S. solfataricus bound to ADP
Method: EM (single particle) / Resolution: 4.19 Å

22187

6xhj

EMDB-22187, PDB-6xhj:
Cryo-EM structure of octadecameric TF55 (beta-only) complex from S. solfataricus bound to ATP
Method: EM (single particle) / Resolution: 3.62 Å

Chemicals

ChemComp-ADP:
ADENOSINE-5'-DIPHOSPHATE / ADP, energy-carrying molecule*YM

ChemComp-MG:
Unknown entry

ChemComp-ATP:
ADENOSINE-5'-TRIPHOSPHATE / ATP, energy-carrying molecule*YM

Source
  • Saccharolobus solfataricus (archaea)
  • saccharolobus solfataricus (strain atcc 35092 / dsm 1617 / jcm 11322 / p2) (archaea)
KeywordsCHAPERONE / Chaperonin / Complex

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