IDEAS home Printed from https://ideas.repec.org/a/nat/nature/v412y2001i6848d10.1038_35089098.html
   My bibliography  Save this article

Iron deficiency induces the formation of an antenna ring around trimeric photosystem I in cyanobacteria

Author

Listed:
  • Thomas S. Bibby

    (Wolfson Laboratories, Imperial College of Science, Technology & Medicine)

  • Jon Nield

    (Wolfson Laboratories, Imperial College of Science, Technology & Medicine)

  • James Barber

    (Wolfson Laboratories, Imperial College of Science, Technology & Medicine)

Abstract

Although iron is the fourth most abundant element in the Earth's crust, its concentration in the aquatic ecosystems—particularly the open oceans—is sufficiently low to limit photosynthetic activity and phytoplankton growth1,2. Cyanobacteria, a major class of phytoplankton, respond to iron deficiency by expressing the ‘iron-stress-induced’ gene, isiA(ref. 3). The protein encoded by this gene has an amino-acid sequence that shows significant homology with one of the chlorophyll a-binding proteins (CP43) of photosystem II (PSII)4,5. The precise function of the CP43-like protein, here called CP43′, has not been elucidated, although there have been many suggestions3,6. Here we show that CP43′ associates with photosystem I (PSI) to form a complex that consists of a ring of 18 CP43′ molecules around a PSI trimer. This significantly increases the size of the light-harvesting system of PSI. The utilization of a PSII-like protein as an extra antenna for PSI emphasises the flexibility of cyanobacterial light-harvesting systems, and seems to be a strategy which compensates for the lowering of phycobilisome and PSI levels in response to iron deficiency.

Suggested Citation

  • Thomas S. Bibby & Jon Nield & James Barber, 2001. "Iron deficiency induces the formation of an antenna ring around trimeric photosystem I in cyanobacteria," Nature, Nature, vol. 412(6848), pages 743-745, August.
    • Handle: RePEc:nat:nature:v:412:y:2001:i:6848:d:10.1038_35089098
    DOI: 10.1038/35089098
    as

    Download full text from publisher

    File URL: https://www.nature.com/articles/35089098
    File Function: Abstract
    Download Restriction: Access to the full text of the articles in this series is restricted.
    File URL: https://libkey.io/10.1038/35089098?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Samarpita Basu & Katherine R. M. Mackey, 2018. "Phytoplankton as Key Mediators of the Biological Carbon Pump: Their Responses to a Changing Climate," Sustainability, MDPI, vol. 10(3), pages 1-18, March.
    2. Ryo Nagao & Koji Kato & Tasuku Hamaguchi & Yoshifumi Ueno & Naoki Tsuboshita & Shota Shimizu & Miyu Furutani & Shigeki Ehira & Yoshiki Nakajima & Keisuke Kawakami & Takehiro Suzuki & Naoshi Dohmae & S, 2023. "Structure of a monomeric photosystem I core associated with iron-stress-induced-A proteins from Anabaena sp. PCC 7120," Nature Communications, Nature, vol. 14(1), pages 1-13, December.
    3. Joseph T Snow & Despo Polyviou & Paul Skipp & Nathan A M Chrismas & Andrew Hitchcock & Richard Geider & C Mark Moore & Thomas S Bibby, 2015. "Quantifying Integrated Proteomic Responses to Iron Stress in the Globally Important Marine Diazotroph Trichodesmium," PLOS ONE, Public Library of Science, vol. 10(11), pages 1-24, November.

    More about this item

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:nat:nature:v:412:y:2001:i:6848:d:10.1038_35089098. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Sonal Shukla or Springer Nature Abstracting and Indexing (email available below). General contact details of provider: http://www.nature.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.