Skip to main content

Composition, Organisation and Function of Purple Photosynthetic Machinery

  • Chapter
  • First Online:
Microbial Photosynthesis

Abstract

Purple photosynthetic bacteria are metabolically versatile, anoxygenic phototrophs that produce bacteriochlorophylls a or b and display a wide range of metabolic lifestyles, which are reflected in their diverse range of habitats. Under oxic conditions, energy is derived from aerobic respiration, and the synthesis of photosynthetic pigments, and pigment-binding proteins, is repressed; when conditions shift to anoxic, the ultrastructure of the cytoplasmic membrane of purple bacteria changes, invaginations forming towards the inside of the cell creating intracytoplasmic membranes (ICMs). The photosynthetic machinery for the light-dependent reactions is housed in these ICMs. Light-harvesting (LH) antenna complexes absorb light energy, which is then transferred through a network of pigment–protein complexes, eventually promoting charge separation in the reaction centre, ultimately resulting in the formation of a proton motive force, used to drive ATP synthesis. ATP is then used to reduce inorganic carbon into organic compounds in the Calvin-Benson-Bassham cycle. Purple bacteria have evolved highly intricate assemblies of pigment–protein complexes to efficiently carry out this process. The assembly and organisation of these complexes differ among different species. In this chapter, we will discuss the structure, function and organisation of the photosynthetic components and the mechanisms underlying the photosynthetic process.

This is a preview of subscription content, log in via an institution to check access.

Access this chapter

Chapter
USD 29.95
Price excludes VAT (USA)
  • Available as PDF
  • Read on any device
  • Instant download
  • Own it forever
eBook
USD 99.00
Price excludes VAT (USA)
  • Available as EPUB and PDF
  • Read on any device
  • Instant download
  • Own it forever
Softcover Book
USD 129.99
Price excludes VAT (USA)
  • Compact, lightweight edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info
Hardcover Book
USD 179.99
Price excludes VAT (USA)
  • Durable hardcover edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info

Tax calculation will be finalised at checkout

Purchases are for personal use only

Institutional subscriptions

References

Download references

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Daniel P. Canniffe .

Editor information

Editors and Affiliations

Rights and permissions

Reprints and permissions

Copyright information

© 2020 Springer Nature Singapore Pte Ltd.

About this chapter

Check for updates. Verify currency and authenticity via CrossMark

Cite this chapter

Miller, L.C., Martin, D.S., Liu, LN., Canniffe, D.P. (2020). Composition, Organisation and Function of Purple Photosynthetic Machinery. In: Wang, Q. (eds) Microbial Photosynthesis. Springer, Singapore. https://doi.org/10.1007/978-981-15-3110-1_4

Download citation

Publish with us

Policies and ethics