Modelling excitation energy transfer and trapping in the filamentous cyanobacterium Anabaena variabilis PCC 7120

Avratanu Biswas; Xinpeng Huang; Petar H. Lambrev; Ivo H.M. van Stokkum

doi:10.1007/s11120-020-00723-0

Modelling excitation energy transfer and trapping in the filamentous cyanobacterium Anabaena variabilis PCC 7120

Avratanu Biswas, Xinpeng Huang, Petar H. Lambrev, Ivo H.M. van Stokkum^*

^*Corresponding author for this work

Research output: Contribution to Journal › Article › Academic › peer-review

Abstract

The phycobilisome (PBS) serves as the major light-harvesting system, funnelling excitation energy to both photosystems (PS) in cyanobacteria and red algae. The picosecond kinetics involving the excitation energy transfer has been studied within the isolated systems and intact filaments of the cyanobacterium Anabaena variabilis PCC 7120. A target model is proposed which resolves the dynamics of the different chromophore groups. The energy transfer rate of 8.5 ± 1.0/ns from the rod to the core is the rate-limiting step, both in vivo and in vitro. The PBS-PSI-PSII supercomplex reveals efficient excitation energy migration from the low-energy allophycocyanin, which is the terminal emitter, in the PBS core to the chlorophyll a in the photosystems. The terminal emitter of the phycobilisome transfers energy to both PSI and PSII with a rate of 50 ± 10/ns, equally distributing the solar energy to both photosystems. Finally, the excitation energy is trapped by charge separation in the photosystems with trapping rates estimated to be 56 ± 6/ns in PSI and 14 ± 2/ns in PSII.

Original language	English
Pages (from-to)	261-272
Number of pages	12
Journal	Photosynthesis Research
Volume	144
Issue number	2
Early online date	19 Feb 2020
DOIs	https://doi.org/10.1007/s11120-020-00723-0
Publication status	Published - 1 May 2020

Funding

This project was supported by the European Union's Horizon 2020 research and innovation program under the Marie Skłodowska-Curie Grant Agreement No 675006(SE2B). PHL acknowledges support from the National Research Development and Innovation Office of Hungary (Grants NN 124904, 2018-1.2.1-NKP-2018-00009). We gratefully acknowledge Parveen Akhtar and Tomas Zakar (BRC; Hungary) for helpful discussions. Lauren Nicol, Vincenzo Mascoli, Luca Bersanini, Lijin Tian, Martijn Tros, Bart Sasbrink and Joern Weissenborn are thanked for their helpful support regarding the isolation, streak measurements and software development.

Funders	Funder number
European Union's Horizon 2020 research and innovation program
Marie Skłodowska-Curie
National Research Development and Innovation Office of Hungary	2018-1.2.1-NKP-2018-00009, NN 124904
Horizon 2020 Framework Programme	675006
Horizon 2020

Keywords

Global analysis
Light harvesting
Photosystem I
Photosystem II
Phycobilisome
Target analysis

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1007/s11120-020-00723-0

Persistent URL (handle)

Persistent link

Cite this

@article{30511e5b826e4189957f7af966274701,

title = "Modelling excitation energy transfer and trapping in the filamentous cyanobacterium Anabaena variabilis PCC 7120",

abstract = "The phycobilisome (PBS) serves as the major light-harvesting system, funnelling excitation energy to both photosystems (PS) in cyanobacteria and red algae. The picosecond kinetics involving the excitation energy transfer has been studied within the isolated systems and intact filaments of the cyanobacterium Anabaena variabilis PCC 7120. A target model is proposed which resolves the dynamics of the different chromophore groups. The energy transfer rate of 8.5 ± 1.0/ns from the rod to the core is the rate-limiting step, both in vivo and in vitro. The PBS-PSI-PSII supercomplex reveals efficient excitation energy migration from the low-energy allophycocyanin, which is the terminal emitter, in the PBS core to the chlorophyll a in the photosystems. The terminal emitter of the phycobilisome transfers energy to both PSI and PSII with a rate of 50 ± 10/ns, equally distributing the solar energy to both photosystems. Finally, the excitation energy is trapped by charge separation in the photosystems with trapping rates estimated to be 56 ± 6/ns in PSI and 14 ± 2/ns in PSII.",

keywords = "Global analysis, Light harvesting, Photosystem I, Photosystem II, Phycobilisome, Target analysis",

author = "Avratanu Biswas and Xinpeng Huang and Lambrev, {Petar H.} and {van Stokkum}, {Ivo H.M.}",

year = "2020",

month = may,

day = "1",

doi = "10.1007/s11120-020-00723-0",

language = "English",

volume = "144",

pages = "261--272",

journal = "Photosynthesis Research",

issn = "0166-8595",

publisher = "Springer Netherlands",

number = "2",

}

TY - JOUR

T1 - Modelling excitation energy transfer and trapping in the filamentous cyanobacterium Anabaena variabilis PCC 7120

AU - Biswas, Avratanu

AU - Huang, Xinpeng

AU - Lambrev, Petar H.

AU - van Stokkum, Ivo H.M.

PY - 2020/5/1

Y1 - 2020/5/1

N2 - The phycobilisome (PBS) serves as the major light-harvesting system, funnelling excitation energy to both photosystems (PS) in cyanobacteria and red algae. The picosecond kinetics involving the excitation energy transfer has been studied within the isolated systems and intact filaments of the cyanobacterium Anabaena variabilis PCC 7120. A target model is proposed which resolves the dynamics of the different chromophore groups. The energy transfer rate of 8.5 ± 1.0/ns from the rod to the core is the rate-limiting step, both in vivo and in vitro. The PBS-PSI-PSII supercomplex reveals efficient excitation energy migration from the low-energy allophycocyanin, which is the terminal emitter, in the PBS core to the chlorophyll a in the photosystems. The terminal emitter of the phycobilisome transfers energy to both PSI and PSII with a rate of 50 ± 10/ns, equally distributing the solar energy to both photosystems. Finally, the excitation energy is trapped by charge separation in the photosystems with trapping rates estimated to be 56 ± 6/ns in PSI and 14 ± 2/ns in PSII.

AB - The phycobilisome (PBS) serves as the major light-harvesting system, funnelling excitation energy to both photosystems (PS) in cyanobacteria and red algae. The picosecond kinetics involving the excitation energy transfer has been studied within the isolated systems and intact filaments of the cyanobacterium Anabaena variabilis PCC 7120. A target model is proposed which resolves the dynamics of the different chromophore groups. The energy transfer rate of 8.5 ± 1.0/ns from the rod to the core is the rate-limiting step, both in vivo and in vitro. The PBS-PSI-PSII supercomplex reveals efficient excitation energy migration from the low-energy allophycocyanin, which is the terminal emitter, in the PBS core to the chlorophyll a in the photosystems. The terminal emitter of the phycobilisome transfers energy to both PSI and PSII with a rate of 50 ± 10/ns, equally distributing the solar energy to both photosystems. Finally, the excitation energy is trapped by charge separation in the photosystems with trapping rates estimated to be 56 ± 6/ns in PSI and 14 ± 2/ns in PSII.

KW - Global analysis

KW - Light harvesting

KW - Photosystem I

KW - Photosystem II

KW - Phycobilisome

KW - Target analysis

UR - http://www.scopus.com/inward/record.url?scp=85079644179&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85079644179&partnerID=8YFLogxK

U2 - 10.1007/s11120-020-00723-0

DO - 10.1007/s11120-020-00723-0

M3 - Article

C2 - 32076914

AN - SCOPUS:85079644179

SN - 0166-8595

VL - 144

SP - 261

EP - 272

JO - Photosynthesis Research

JF - Photosynthesis Research

IS - 2

ER -

Modelling excitation energy transfer and trapping in the filamentous cyanobacterium Anabaena variabilis PCC 7120

Abstract

Funding

Keywords

UN SDGs

Access to Document

Persistent URL (handle)

Other files and links

Fingerprint

Cite this