Selective disruption of energy flow from phycobilisomes to Photosystem I

Alexander N. Glazer, Yvonne Gindt, Crystal F. Chan, Kenneth Sauer

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

Efficient production of ATP and NADPH by the 'light' reactions of oxygen-evolving photosynthesis demands continuous adjustment of transfer of absorbed light energy from antenna complexes to Photosystem I (PS I) and II (PS II) reaction center complexes in response to changes in light quality. Treatment of intact cyanobacterial cells with N-ethylmaleimide appears to disrupt energy transfer from phycobilisomes to Photosystem I (PS I). Energy transfer from phycobilisomes to Photosystem II (PS II) is unperturbed. Spectroscopic analysis indicates that the individual complexes (phycobilisomes, PS II, PS I) remain functionally intact under these conditions. The results are consistent with the presence of connections between phycobiliproteins and both PS II and PS I, but they do not support the existence of direct contacts between the two photosystems.

Original languageEnglish
Pages (from-to)167-173
Number of pages7
JournalPhotosynthesis Research
Volume40
Issue number2
DOIs
StatePublished - 1 May 1994

Fingerprint

Phycobilisomes
phycobilisome
Photosystem I Protein Complex
energy flow
photosystem I
Photosystem II Protein Complex
Energy Transfer
energy transfer
Energy transfer
photosystem II
Phycobiliproteins
Light
Ethylmaleimide
Spectroscopic analysis
Photosynthesis
light quality
direct contact
NADP
NADP (coenzyme)
antennae

Keywords

  • cyanobacteria
  • epr
  • excitation energy transfer
  • fluorescence
  • sulfhydryl modification

Cite this

Glazer, Alexander N. ; Gindt, Yvonne ; Chan, Crystal F. ; Sauer, Kenneth. / Selective disruption of energy flow from phycobilisomes to Photosystem I. In: Photosynthesis Research. 1994 ; Vol. 40, No. 2. pp. 167-173.
@article{ec49e6d3b45440d089428135c985c70a,
title = "Selective disruption of energy flow from phycobilisomes to Photosystem I",
abstract = "Efficient production of ATP and NADPH by the 'light' reactions of oxygen-evolving photosynthesis demands continuous adjustment of transfer of absorbed light energy from antenna complexes to Photosystem I (PS I) and II (PS II) reaction center complexes in response to changes in light quality. Treatment of intact cyanobacterial cells with N-ethylmaleimide appears to disrupt energy transfer from phycobilisomes to Photosystem I (PS I). Energy transfer from phycobilisomes to Photosystem II (PS II) is unperturbed. Spectroscopic analysis indicates that the individual complexes (phycobilisomes, PS II, PS I) remain functionally intact under these conditions. The results are consistent with the presence of connections between phycobiliproteins and both PS II and PS I, but they do not support the existence of direct contacts between the two photosystems.",
keywords = "cyanobacteria, epr, excitation energy transfer, fluorescence, sulfhydryl modification",
author = "Glazer, {Alexander N.} and Yvonne Gindt and Chan, {Crystal F.} and Kenneth Sauer",
year = "1994",
month = "5",
day = "1",
doi = "10.1007/BF00019333",
language = "English",
volume = "40",
pages = "167--173",
journal = "Photosynthesis Research",
issn = "0166-8595",
publisher = "Springer Netherlands",
number = "2",

}

Selective disruption of energy flow from phycobilisomes to Photosystem I. / Glazer, Alexander N.; Gindt, Yvonne; Chan, Crystal F.; Sauer, Kenneth.

In: Photosynthesis Research, Vol. 40, No. 2, 01.05.1994, p. 167-173.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Selective disruption of energy flow from phycobilisomes to Photosystem I

AU - Glazer, Alexander N.

AU - Gindt, Yvonne

AU - Chan, Crystal F.

AU - Sauer, Kenneth

PY - 1994/5/1

Y1 - 1994/5/1

N2 - Efficient production of ATP and NADPH by the 'light' reactions of oxygen-evolving photosynthesis demands continuous adjustment of transfer of absorbed light energy from antenna complexes to Photosystem I (PS I) and II (PS II) reaction center complexes in response to changes in light quality. Treatment of intact cyanobacterial cells with N-ethylmaleimide appears to disrupt energy transfer from phycobilisomes to Photosystem I (PS I). Energy transfer from phycobilisomes to Photosystem II (PS II) is unperturbed. Spectroscopic analysis indicates that the individual complexes (phycobilisomes, PS II, PS I) remain functionally intact under these conditions. The results are consistent with the presence of connections between phycobiliproteins and both PS II and PS I, but they do not support the existence of direct contacts between the two photosystems.

AB - Efficient production of ATP and NADPH by the 'light' reactions of oxygen-evolving photosynthesis demands continuous adjustment of transfer of absorbed light energy from antenna complexes to Photosystem I (PS I) and II (PS II) reaction center complexes in response to changes in light quality. Treatment of intact cyanobacterial cells with N-ethylmaleimide appears to disrupt energy transfer from phycobilisomes to Photosystem I (PS I). Energy transfer from phycobilisomes to Photosystem II (PS II) is unperturbed. Spectroscopic analysis indicates that the individual complexes (phycobilisomes, PS II, PS I) remain functionally intact under these conditions. The results are consistent with the presence of connections between phycobiliproteins and both PS II and PS I, but they do not support the existence of direct contacts between the two photosystems.

KW - cyanobacteria

KW - epr

KW - excitation energy transfer

KW - fluorescence

KW - sulfhydryl modification

UR - http://www.scopus.com/inward/record.url?scp=0028078029&partnerID=8YFLogxK

U2 - 10.1007/BF00019333

DO - 10.1007/BF00019333

M3 - Article

AN - SCOPUS:0028078029

VL - 40

SP - 167

EP - 173

JO - Photosynthesis Research

JF - Photosynthesis Research

SN - 0166-8595

IS - 2

ER -