Crossref journal-article
Wiley
Protein Science (311)
Abstract

AbstractDF1 is a small, idealized model for carboxylate‐bridged diiron proteins. This protein was designed to form a dimeric four‐helix bundle with a dimetal ion‐binding site near the center of the structure, and its crystal structure has confirmed that it adopts the intended conformation. However, the protein showed limited solubility in aqueous buffer, and access to its active site was blocked by two hydrophobic side chains. The sequence of DF1 has now been modified to provide a very soluble protein (DF2) that binds metal ions in a rapid and reversible manner. Furthermore, the DF2 protein shows significant ferroxidase activity, suggesting that its dimetal center is accessible to oxygen. The affinity of DF2 for various first‐row divalent cations deviates from the Irving–Willliams series, suggesting that its structure imparts significant geometric preferences on the metal ion‐binding site. Furthermore, in the absence of metal ions, the protein folds into a dimer with concomitant binding of two protons. The uptake of two protons is expected if the structure of the apo‐protein is similar to that of the crystal structure of dizinc DF1. Thus, this result suggests that the active site of DF2 is retained in the absence of metal ions.

Bibliography

Pasternak, A., Kaplan, J., Lear, J. D., & Degrado, W. F. (2001). Proton and metal ion‐dependent assembly of a model diiron protein. Protein Science, 10(5), 958–969. Portico.

Authors 4
  1. Annette Pasternak (first)
  2. Justin Kaplan (additional)
  3. James D. Lear (additional)
  4. William F. Degrado (additional)
References 44 Referenced 52
  1. 10.1038/361276a0
  2. 10.1016/S0898-8838(08)60120-8
  3. 10.1021/ja982280c
  4. 10.1021/bi980583d
  5. 10.1073/pnas.97.12.6292
  6. {'key': 'e_1_2_7_7_1', 'first-page': '71', 'article-title': 'High spin cobalt(II) as a probe for the investigation of metalloproteins', 'volume': '6', 'author': 'Bertini I.', 'year': '1984', 'journal-title': 'Adv. Inorg. Biochem.'} / Adv. Inorg. Biochem. / High spin cobalt(II) as a probe for the investigation of metalloproteins by Bertini I. (1984)
  7. 10.1126/science.1650033
  8. 10.1021/bi9806605
  9. 10.1016/0003-2697(71)90405-2
  10. 10.1021/ja00082a005
  11. {'key': 'e_1_2_7_12_1', 'volume-title': 'The biological chemistry of the elements.', 'author': 'da Silva J.J.R.F.', 'year': '1993'} / The biological chemistry of the elements. by da Silva J.J.R.F. (1993)
  12. 10.1385/0-89603-244-2:263
  13. 10.1021/cr00027a011
  14. 10.1021/bi00209a008
  15. 10.1038/nsb0794-453
  16. 10.1007/s002490050043
  17. 10.1073/pnas.93.26.15041
  18. 10.1021/ja00174a039
  19. 10.1126/science.8346440
  20. 10.1016/0162-0134(93)85619-J
  21. 10.1016/S1359-0278(98)00001-7
  22. {'key': 'e_1_2_7_23_1', 'volume-title': 'Inorganic chemistry: Principles of structure and reactivity.', 'author': 'Huheey J.E.', 'year': '1993'} / Inorganic chemistry: Principles of structure and reactivity. by Huheey J.E. (1993)
  23. 10.1074/jbc.272.1.422
  24. 10.1021/bi961781c
  25. 10.1016/S1367-5931(98)80057-4
  26. {'key': 'e_1_2_7_27_1', 'first-page': '90', 'volume-title': 'Analytical ultracentrifugation in biochemistry and polymer science', 'author': 'Laue T.', 'year': '1992'} / Analytical ultracentrifugation in biochemistry and polymer science by Laue T. (1992)
  27. 10.1016/S0014-5793(96)01172-6
  28. 10.1002/j.1460-2075.1996.tb00783.x
  29. 10.1073/pnas.97.12.6298
  30. 10.1016/0959-440X(95)80008-5
  31. 10.1038/362367a0
  32. 10.1073/pnas.94.11.5562
  33. 10.1021/ja952831o
  34. 10.1016/S0968-0004(00)89044-1
  35. 10.1021/bi00501a003
  36. 10.1038/368425a0
  37. {'key': 'e_1_2_7_38_1', 'first-page': '53', 'volume-title': 'Protein Folding', 'author': 'Schellman C.', 'year': '1980'} / Protein Folding by Schellman C. (1980)
  38. 10.1021/ja991164m
  39. 10.1021/ja00001a023
  40. 10.1021/ja973357k
  41. 10.1016/0263-7855(90)80070-V
  42. 10.1021/cr9500489
  43. 10.1021/bi973128a
  44. 10.1021/bi992631f
Dates
Type When
Created 23 years, 1 month ago (July 26, 2002, 8 p.m.)
Deposited 1 year, 10 months ago (Oct. 8, 2023, 8:19 a.m.)
Indexed 1 year, 2 months ago (June 8, 2024, 5:56 p.m.)
Issued 24 years, 4 months ago (May 1, 2001)
Published 24 years, 4 months ago (May 1, 2001)
Published Online 16 years, 8 months ago (Dec. 31, 2008)
Published Print 24 years, 4 months ago (May 1, 2001)
Funders 0

None

@article{Pasternak_2001, title={Proton and metal ion‐dependent assembly of a model diiron protein}, volume={10}, ISSN={1469-896X}, url={http://dx.doi.org/10.1110/ps.52101}, DOI={10.1110/ps.52101}, number={5}, journal={Protein Science}, publisher={Wiley}, author={Pasternak, Annette and Kaplan, Justin and Lear, James D. and Degrado, William F.}, year={2001}, month=may, pages={958–969} }