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Unique Peripheral Antennas in the Photosystems of the Streptophyte Alga Mesostigma viride

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Title: Unique Peripheral Antennas in the Photosystems of the Streptophyte Alga Mesostigma viride
Authors: Aso, Michiki Browse this author
Matsumae, Renon Browse this author
Tanaka, Ayumi Browse this author →KAKEN DB
Tanaka, Ryouichi Browse this author →KAKEN DB
Takabayashi, Atsushi Browse this author →KAKEN DB
Keywords: Green algae
Mesostigma viride
Issue Date: 8-Jan-2021
Publisher: Oxford University Press
Journal Title: Plant and Cell Physiology
Volume: 62
Issue: 3
Start Page: 436
End Page: 446
Publisher DOI: 10.1093/pcp/pcaa172
Abstract: Land plants evolved from a single group of streptophyte algae. One of the key factors needed for adaptation to a land environment is the modification in the peripheral antenna systems of photosystems (PSs). Here, the PSs of Mesostigma viride, one of the earliest-branching streptophyte algae, were analyzed to gain insight into their evolution. Isoform sequencing and phylogenetic analyses of light-harvesting complexes (LHCs) revealed that M. viride possesses three algae-specific LHCs, including algae-type LHCA2, LHCA9 and LHCP, while the streptophyte-specific LHCB6 was not identified. These data suggest that the acquisition of LHCB6 and the loss of algae-type LHCs occurred after the M. viride lineage branched off from other streptophytes. Clear-native (CN)-polyacrylamide gel electrophoresis (PAGE) resolved the photosynthetic complexes, including the PSI-PSII megacomplex, PSII-LHCII, two PSI-LHCI-LHCIIs, PSI-LHCI and the LHCII trimer. Results indicated that the higher-molecular weight PSI-LHCI-LHCII likely had more LHCII than the lower-molecular weight one, a unique feature of M. viride PSs. CN-PAGE coupled with mass spectrometry strongly suggested that the LHCP was bound to PSII-LHCII, while the algae-type LHCA2 and LHCA9 were bound to PSI-LHCI, both of which are different from those in land plants. Results of the present study strongly suggest that M. viride PSs possess unique features that were inherited from a common ancestor of streptophyte and chlorophyte algae.
Rights: This is a pre-copyedited, author-produced version of an article accepted for publication in Plant and Cell Physiology following peer review. The version of record is available online at: ,
Type: article (author version)
Appears in Collections:低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 高林 厚史

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