Crossref journal-article
Wiley
Protein Science (311)
Abstract

AbstractMolecular machines order and disorder polypeptides as they form and dissolve large intermolecular interfaces, but the biological significance of coupled ordering and binding has been established in few, if any, macromolecular systems. The ordering and binding of GroES co‐chaperonin mobile loops accompany an ATP‐dependent conformational change in the GroEL chaperonin that promotes client protein folding. Following ATP hydrolysis, disordering of the mobile loops accompanies co‐chaperonin dissociation, reversal of the GroEL conformational change, and release of the client protein. “High‐affinity” GroEL mutants were identified by their compatibility with “low‐affinity” co‐chaperonin mutants and incompatibility with high‐affinity co‐chaperonin mutants. Analysis of binding kinetics using the intrinsic fluorescence of tryptophan‐containing co‐chaperonin variants revealed that excessive affinity causes the chaperonin to stall in a conformation that forms in the presence of ATP. Destabilizing the β‐hairpins formed by the mobile loops restores the normal rate of dissociation. Thus, the free energy of mobile‐loop ordering and disordering acts like the inertia of an engine's flywheel by modulating the speed of chaperonin conformational changes.

Bibliography

Shewmaker, F., Kerner, M. J., Hayer‐Hartl, M., Klein, G., Georgopoulos, C., & Landry, S. J. (2004). A mobile loop order–disorder transition modulates the speed of chaperonin cycling. Protein Science, 13(8), 2139–2148. Portico.

Authors 6
  1. Frank Shewmaker (first)
  2. Michael J. Kerner (additional)
  3. Manajit Hayer‐Hartl (additional)
  4. Gracjana Klein (additional)
  5. Costa Georgopoulos (additional)
  6. Samuel J. Landry (additional)
References 50 Referenced 17
  1. 10.1016/0960-9822(93)90268-S
  2. 10.1074/jbc.273.51.34075
  3. 10.1146/annurev.genet.34.1.439
  4. 10.1074/jbc.M008477200
  5. 10.1016/0022-2364(85)90018-6
  6. 10.1073/pnas.90.9.3978
  7. 10.1038/371578a0
  8. 10.1016/S0092-8674(01)00517-7
  9. 10.1021/bi00220a020
  10. 10.1093/emboj/cdg477
  11. 10.1038/90443
  12. 10.1038/10735
  13. 10.1021/bi012159
  14. 10.1016/S0959-440X(02)00289-0
  15. 10.1016/S0092-8674(00)80692-3
  16. 10.1038/371614a0
  17. 10.1016/0092-8674(91)90378-C
  18. 10.1021/bi020117v
  19. 10.1126/science.7638601
  20. 10.1038/379037a0
  21. 10.1016/S0092-8674(00)80343-8
  22. 10.1016/S0021-9258(19)39009-X / J. Biol. Chem. / Enhanced operator binding by trp superrepressors of Escherichia coli by Hurlburt B.K. (1990)
  23. 10.1016/S0022-2836(02)00969-5
  24. 10.1063/1.438208
  25. 10.1093/embo-reports/kvf176
  26. 10.1093/genetics/158.2.507 / Genetics / Identification of important amino acid residues that modulate binding of Escherichia coli GroEL to its various cochaperones by Klein G. (2001)
  27. 10.1038/364255a0
  28. 10.1073/pnas.93.21.11622
  29. 10.1021/bi971141p
  30. {'key': 'e_1_2_12_31_1', 'first-page': '520', 'volume-title': "acific Symposium on Biocomputing '99", 'author': 'Landry S.J.', 'year': '1999'} / acific Symposium on Biocomputing '99 by Landry S.J. (1999)
  31. 10.1006/jmbi.1998.2439
  32. 10.1038/41892
  33. 10.1038/371264a0
  34. 10.1016/S0022-2836(02)01281-0
  35. 10.1002/bip.10286
  36. 10.1007/BF02192855
  37. 10.1074/jbc.274.1.52
  38. 10.1016/0960-9822(93)90176-O
  39. 10.1074/jbc.M102765200
  40. 10.1073/pnas.160259697
  41. 10.1126/science.284.5415.822
  42. 10.1006/jmra.1993.1098
  43. 10.1021/bi00084a024
  44. 10.1126/science.7913555
  45. 10.1038/368654a0
  46. 10.1016/0022-2836(91)90214-Q
  47. 10.1006/jmbi.1999.3110
  48. 10.1038/41944
  49. 10.1021/bi00016a001
  50. 10.1128/jb.176.21.6558-6565.1994 / J. Bacteriol. / Two classes of extragenic suppressor mutations identify functionally distinct regions of the GroEL chaperone of Escherichia coli by Zeilstra‐Ryalls J. (1994)
Dates
Type When
Created 21 years, 1 month ago (July 6, 2004, 9:14 p.m.)
Deposited 1 year, 11 months ago (Sept. 28, 2023, 6:47 p.m.)
Indexed 1 year, 1 month ago (July 2, 2024, 1:08 a.m.)
Issued 21 years ago (Aug. 1, 2004)
Published 21 years ago (Aug. 1, 2004)
Published Online 16 years, 7 months ago (Jan. 1, 2009)
Published Print 21 years ago (Aug. 1, 2004)
Funders 0

None

@article{Shewmaker_2004, title={A mobile loop order–disorder transition modulates the speed of chaperonin cycling}, volume={13}, ISSN={1469-896X}, url={http://dx.doi.org/10.1110/ps.04773204}, DOI={10.1110/ps.04773204}, number={8}, journal={Protein Science}, publisher={Wiley}, author={Shewmaker, Frank and Kerner, Michael J. and Hayer‐Hartl, Manajit and Klein, Gracjana and Georgopoulos, Costa and Landry, Samuel J.}, year={2004}, month=aug, pages={2139–2148} }