On the efficiency of energy transfer and the different pathways of electron transfer in mutant reaction centers of Rhodobacter sphaeroides

Van Brederode, ME, Ridge, JP, van Stokkum, IHM, van Mourik, F, Jones, MR and van Grondelle, R (1998). On the efficiency of energy transfer and the different pathways of electron transfer in mutant reaction centers of Rhodobacter sphaeroides. In: Photosynthesis Research. Workshop on Reaction Centers of Photosynthetic Purple Bacteria - Structure, Spectroscopy, Dynamics, Cadarache France, (141-146). Jun 01-06, 1997. doi:10.1023/A:1005925917867


Author Van Brederode, ME
Ridge, JP
van Stokkum, IHM
van Mourik, F
Jones, MR
van Grondelle, R
Title of paper On the efficiency of energy transfer and the different pathways of electron transfer in mutant reaction centers of Rhodobacter sphaeroides
Conference name Workshop on Reaction Centers of Photosynthetic Purple Bacteria - Structure, Spectroscopy, Dynamics
Conference location Cadarache France
Conference dates Jun 01-06, 1997
Proceedings title Photosynthesis Research   Check publisher's open access policy
Journal name Photosynthesis Research   Check publisher's open access policy
Place of Publication DORDRECHT
Publisher KLUWER ACADEMIC PUBL
Publication Year 1998
Year available 1998
Sub-type Fully published paper
DOI 10.1023/A:1005925917867
Open Access Status DOI
ISSN 0166-8595
Volume 55
Issue 2-3
Start page 141
End page 146
Total pages 6
Language eng
Abstract/Summary The efficiency of energy transfer from the monomeric pigments to the primary donor was determined from 77 K steady-state fluorescence excitation spectra of three mutant reaction centers, YM210L, YM210F and LM160H / FM197H. For all three reaction centers this efficiency was not 100% and ranged between 55 and 70%. For the YM210L mutant it was shown using pump-probe spectroscopy with B band excitation at 798 nm that the excitations which are not transferred to P give rise to efficient charge separation. The results can be interpreted with a model in which excitation of the B absorbance band leads to direct formation of the radical pair state BA+HA- in addition to energy transfer to P. It is also possible that some P+BA- is formed from B*. In previous publications we have demonstrated the operation of such alternative pathways for transmembrane electron transfer in a YM210W mutant reaction center [van Brederode et al. (1996) The Reaction center of Photosynthetic Bacteria, pp 225-238; (1997a,b) Chem Phys Lett 268: 143-149; Biochemistry 36: 6855-6861]. The results presented here demonstrate that these alternative mechanisms are not peculiar to the YM210W reaction center.
Keyword bacterial reaction center
electron transfer
energy transfer
monomeric bacteriochlorophyll
primary charge separation
primary donor
Photosynthetic Reaction Centers
Charge Separation
Bacterial Photosynthesis
Dynamics
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Conference Paper
Sub-type: Fully published paper
Collection: ResearcherID Downloads - Archived
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 11 times in Thomson Reuters Web of Science Article | Citations
Google Scholar Search Google Scholar
Created: Sun, 11 Sep 2011, 11:11:07 EST by System User