Journal Article

A Truncated Mutant of the Extrinsic 23-kDa Protein that Absolutely Requires the Extrinsic 17-kDa Protein for Ca<sup>2+</sup> Retention in Photosystem II

Kentaro Ifuku and Fumihiko Sato

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 43, issue 10, pages 1244-1249
Published in print October 2002 | ISSN: 0032-0781
Published online October 2002 | e-ISSN: 1471-9053 | DOI: http://dx.doi.org/10.1093/pcp/pcf136
A Truncated Mutant of the Extrinsic 23-kDa Protein that Absolutely Requires the Extrinsic 17-kDa Protein for Ca2+ Retention in Photosystem II

More Like This

Show all results sharing these subjects:

  • Biochemistry
  • Molecular and Cell Biology
  • Plant Sciences and Forestry

GO

Show Summary Details

Preview

One function of the extrinsic 23-kDa protein in photosystem II (OEC23) is to retain Ca2+ and Cl, two essential cofactors for photosynthetic oxygen evolution. A truncated mutant of OEC23 (OEC23 Δ19) revealed that 19 residues of the N-terminus of OEC23 were necessary for Ca2+ retention but not for its proper interaction with OEC17, the extrinsic 17-kDa protein in photosystem II. The lost ability of OEC23 Δ19 to reconstitute the oxygen-evolving activity was partially restored by OEC17 binding, suggesting the involvement of OEC17 in Ca2+ retention in photosystem II.

Keywords: Keywords: Ca2+ retention — Extrinsic 23-kDa protein — Extrinsic 17-kDa protein — Oxygen-evolving complex — Photosystem II.; Abbreviations: CBB, Coomassie brilliant blue; OEC23, the extrinsic 23-kDa protein in an oxygen-evolving complex; OEC17, the extrinsic17-kDa protein in an oxygen-evolving complex.

Journal Article.  3517 words.  Illustrated.

Subjects: Biochemistry ; Molecular and Cell Biology ; Plant Sciences and Forestry

Full text: subscription required

How to subscribe Recommend to my Librarian

Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.