Masahiko Ikeuchi

Summary

Affiliation: University of Tokyo
Country: Japan

Publications

  1. doi request reprint Cyanobacteriochromes: a new superfamily of tetrapyrrole-binding photoreceptors in cyanobacteria
    Masahiko Ikeuchi
    Department of Life Sciences, Biology, The University of Tokyo, Komaba, Meguro, Tokyo, 153 8902, Japan
    Photochem Photobiol Sci 7:1159-67. 2008
  2. doi request reprint Novel photosensory two-component system (PixA-NixB-NixC) involved in the regulation of positive and negative phototaxis of cyanobacterium Synechocystis sp. PCC 6803
    Rei Narikawa
    Department of Life Sciences Biology, Graduate School of Art and Sciences, University of Tokyo, Komaba 3 8 1, Meguro, Tokyo, 153 8902 Japan
    Plant Cell Physiol 52:2214-24. 2011
  3. doi request reprint A novel photoactive GAF domain of cyanobacteriochrome AnPixJ that shows reversible green/red photoconversion
    Rei Narikawa
    Department of Life Sciences Biology, Graduate School of Art and Sciences, University of Tokyo, Komaba, Meguro, Tokyo 153 0041, Japan
    J Mol Biol 380:844-55. 2008
  4. pmc Structures of cyanobacteriochromes from phototaxis regulators AnPixJ and TePixJ reveal general and specific photoconversion mechanism
    Rei Narikawa
    Department of Life Sciences Biology, Graduate School of Art and Sciences, University of Tokyo, Komaba, Meguro, Tokyo 153 8902, Japan
    Proc Natl Acad Sci U S A 110:918-23. 2013
  5. ncbi request reprint Three putative photosensory light, oxygen or voltage (LOV) domains with distinct biochemical properties from the filamentous cyanobacterium Anabaena sp. PCC 7120
    Rei Narikawa
    Department of Life Sciences Biology, Graduate School of Art and Sciences, University of Tokyo, Komaba, Meguro, Tokyo 153 8902, Japan
    Photochem Photobiol 82:1627-33. 2006
  6. pmc Attachment of phycobilisomes in an antenna-photosystem I supercomplex of cyanobacteria
    Mai Watanabe
    Department of Life Sciences Biology, Graduate School of Arts and Sciences, University of Tokyo, Komaba, Meguro, Tokyo 153 8902, Japan
    Proc Natl Acad Sci U S A 111:2512-7. 2014
  7. ncbi request reprint AnCrpA, a cAMP receptor protein, regulates nif-related gene expression in the cyanobacterium Anabaena sp. strain PCC 7120 grown with nitrate
    Takayuki Suzuki
    Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Japan
    FEBS Lett 581:21-8. 2007
  8. ncbi request reprint Absence of the psbH gene product destabilizes the Photosystem II complex and prevents association of the Photosystem II-X protein in the thermophilic cyanobacterium Thermosynechococcus elongatus BP-1
    Masako Iwai
    Department of Life Sciences Biology, University of Tokyo, Komaba 3 8 1, Meguro, Tokyo, 153 8902, Japan
    Photosynth Res 87:313-22. 2006
  9. doi request reprint Proteases are associated with a minor fucoxanthin chlorophyll a/c-binding protein from the diatom, Chaetoceros gracilis
    Ryo Nagao
    Department of Life Sciences Biology, Graduate School of Art and Sciences, University of Tokyo, Komaba 3 8 1, Meguro ku, Tokyo, 153 8902, Japan
    Biochim Biophys Acta 1817:2110-7. 2012
  10. doi request reprint Characterization of the photoactive GAF domain of the CikA homolog (SyCikA, Slr1969) of the cyanobacterium Synechocystis sp. PCC 6803
    Rei Narikawa
    Department of Life Sciences Biology, Graduate School of Art and Sciences, University of Tokyo, Komaba, Meguro, Tokyo, 153 8902, Japan
    Photochem Photobiol Sci 7:1253-9. 2008

Collaborators

Detail Information

Publications52

  1. doi request reprint Cyanobacteriochromes: a new superfamily of tetrapyrrole-binding photoreceptors in cyanobacteria
    Masahiko Ikeuchi
    Department of Life Sciences, Biology, The University of Tokyo, Komaba, Meguro, Tokyo, 153 8902, Japan
    Photochem Photobiol Sci 7:1159-67. 2008
    ..We also discussed the functionality of the other candidate GAFs, structure and evolution...
  2. doi request reprint Novel photosensory two-component system (PixA-NixB-NixC) involved in the regulation of positive and negative phototaxis of cyanobacterium Synechocystis sp. PCC 6803
    Rei Narikawa
    Department of Life Sciences Biology, Graduate School of Art and Sciences, University of Tokyo, Komaba 3 8 1, Meguro, Tokyo, 153 8902 Japan
    Plant Cell Physiol 52:2214-24. 2011
    ..These results were discussed with regard to an idea that PixA serves as a violet light receptor for switching of positive and negative phototaxis by transcriptional and functional regulation...
  3. doi request reprint A novel photoactive GAF domain of cyanobacteriochrome AnPixJ that shows reversible green/red photoconversion
    Rei Narikawa
    Department of Life Sciences Biology, Graduate School of Art and Sciences, University of Tokyo, Komaba, Meguro, Tokyo 153 0041, Japan
    J Mol Biol 380:844-55. 2008
    ....
  4. pmc Structures of cyanobacteriochromes from phototaxis regulators AnPixJ and TePixJ reveal general and specific photoconversion mechanism
    Rei Narikawa
    Department of Life Sciences Biology, Graduate School of Art and Sciences, University of Tokyo, Komaba, Meguro, Tokyo 153 8902, Japan
    Proc Natl Acad Sci U S A 110:918-23. 2013
    ..Possible structural changes following the photoisomerization of the chromophore between C15-Z and C15-E are discussed based on the X-ray structures at 1.8 and 2.0-Å resolution, respectively, in two distinct configurations...
  5. ncbi request reprint Three putative photosensory light, oxygen or voltage (LOV) domains with distinct biochemical properties from the filamentous cyanobacterium Anabaena sp. PCC 7120
    Rei Narikawa
    Department of Life Sciences Biology, Graduate School of Art and Sciences, University of Tokyo, Komaba, Meguro, Tokyo 153 8902, Japan
    Photochem Photobiol 82:1627-33. 2006
    ..For comparison, AvA112875-LOV in a closely related A. variabilis was also studied as a homolog of A112875-LOV. Finally, we observed that Alr1229-LOV that is not conserved in N. punctiforme showed no flavin binding...
  6. pmc Attachment of phycobilisomes in an antenna-photosystem I supercomplex of cyanobacteria
    Mai Watanabe
    Department of Life Sciences Biology, Graduate School of Arts and Sciences, University of Tokyo, Komaba, Meguro, Tokyo 153 8902, Japan
    Proc Natl Acad Sci U S A 111:2512-7. 2014
    ..It is proposed that the alternative form of CpcL-PBS is functional in harvesting energy in a wide number of cyanobacteria, partially to facilitate the involvement of PSI in nitrogen fixation. ..
  7. ncbi request reprint AnCrpA, a cAMP receptor protein, regulates nif-related gene expression in the cyanobacterium Anabaena sp. strain PCC 7120 grown with nitrate
    Takayuki Suzuki
    Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Japan
    FEBS Lett 581:21-8. 2007
    ..Thus, AnCrpA regulates the expressions of gene clusters related to nitrogen fixation in the presence of nitrate...
  8. ncbi request reprint Absence of the psbH gene product destabilizes the Photosystem II complex and prevents association of the Photosystem II-X protein in the thermophilic cyanobacterium Thermosynechococcus elongatus BP-1
    Masako Iwai
    Department of Life Sciences Biology, University of Tokyo, Komaba 3 8 1, Meguro, Tokyo, 153 8902, Japan
    Photosynth Res 87:313-22. 2006
    ..These results suggest that the PS II-H protein is essential for stable assembly of native dimeric PS II complex containing PS II-X...
  9. doi request reprint Proteases are associated with a minor fucoxanthin chlorophyll a/c-binding protein from the diatom, Chaetoceros gracilis
    Ryo Nagao
    Department of Life Sciences Biology, Graduate School of Art and Sciences, University of Tokyo, Komaba 3 8 1, Meguro ku, Tokyo, 153 8902, Japan
    Biochim Biophys Acta 1817:2110-7. 2012
    ..Because FCP-A is selectively associated with PSII, these FCP-A-associated metalloproteases and serine protease may be responsible for the proteolytic degradation of FCPs and PSII in thylakoid membranes...
  10. doi request reprint Characterization of the photoactive GAF domain of the CikA homolog (SyCikA, Slr1969) of the cyanobacterium Synechocystis sp. PCC 6803
    Rei Narikawa
    Department of Life Sciences Biology, Graduate School of Art and Sciences, University of Tokyo, Komaba, Meguro, Tokyo, 153 8902, Japan
    Photochem Photobiol Sci 7:1253-9. 2008
    ..These results suggest that SyCikA may function as a violet light sensor in Synechocystis...
  11. ncbi request reprint Cyanobacterial phytochrome-like PixJ1 holoprotein shows novel reversible photoconversion between blue- and green-absorbing forms
    Shizue Yoshihara
    Department of Life Sciences Biology, University of Tokyo, Komaba 3 8 1, Meguro, Tokyo, 153 8902 Japan
    Plant Cell Physiol 45:1729-37. 2004
    ..Site-directed mutagenesis revealed that a Cys-His motif in the second GAF domain of PixJ1 is responsible for binding of the chromophore. Possible chromophore species are discussed with regard to the novel photoconversion spectrum...
  12. ncbi request reprint Fate determination of the flavin photoreceptions in the cyanobacterial blue light receptor TePixD (Tll0078)
    Koji Okajima
    Department of Life Sciences Biology, The University of Tokyo, Japan
    J Mol Biol 363:10-8. 2006
    ..Based on the structural and functional similarities of the BLUF and the LOV domain of phototropins, we propose that the interaction between apoprotein and N(5) of flavin determines the photoreaction of the flavin-binding sensors...
  13. doi request reprint CccS and CccP are involved in construction of cell surface components in the cyanobacterium Synechocystis sp. strain PCC 6803
    Hidehisa Yoshimura
    Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, 3 8 1 Komaba, Meguro ku, Tokyo 153 8902 Japan
    Plant Cell Physiol 51:1163-72. 2010
    ..These results suggest that the cccS and cccP genes are involved in the construction of cell surface components in Synechocystis sp. strain PCC 6803...
  14. pmc Cyanobacteriochrome CcaS regulates phycoerythrin accumulation in Nostoc punctiforme, a group II chromatic adapter
    Yuu Hirose
    Department of Biological Science, Graduate School of Sciences, University of Tokyo, Komaba 3 8 1, Meguro, Tokyo 153 8902, Japan
    Proc Natl Acad Sci U S A 107:8854-9. 2010
    ..We also found that the cpeB-cpeA operon is partially regulated by green and red light, suggesting that the green light-induced regulatory protein CpeR1 activates cpeB-cpeA expression together with constitutively induced CpeR2...
  15. doi request reprint The cyanobacteriochrome, TePixJ, isomerizes its own chromophore by converting phycocyanobilin to phycoviolobilin
    Takami Ishizuka
    Department of Life Sciences Biology, The University of Tokyo, Komaba 3 8 1, Meguro, Tokyo 153 8902, Japan
    Biochemistry 50:953-61. 2011
    ....
  16. doi request reprint DNA replication depends on photosynthetic electron transport in cyanobacteria
    Ryudo Ohbayashi
    Department of Bioscience, Tokyo University of Agriculture, Tokyo, Japan
    FEMS Microbiol Lett 344:138-44. 2013
    ..These results suggest that DNA replication depends on the photosynthetic electron transport activity and initiation and progression of DNA replication are regulated in different ways...
  17. ncbi request reprint Biochemical and functional characterization of BLUF-type flavin-binding proteins of two species of cyanobacteria
    Koji Okajima
    Department of Life Sciences Biology, The University of Tokyo, Komaba, Meguro, Tokyo 153 8902, Japan
    J Biochem 137:741-50. 2005
    ..These results were discussed in relation to the signaling mechanism of the "short" BLUF proteins in the regulation of cyanobacterial phototaxis...
  18. ncbi request reprint PSII-Tc protein plays an important role in dimerization of photosystem II
    Masako Iwai
    Department of Life Sciences Biology, University of Tokyo, Komaba 3 8 1, Meguro, Tokyo, 153 8902 Japan
    Plant Cell Physiol 45:1809-16. 2004
    ..These results appear to be in good agreement with the recent structural model of the dimeric PSII complex...
  19. pmc Crystallization and preliminary X-ray studies of the chromophore-binding domain of cyanobacteriochrome AnPixJ from Anabaena sp. PCC 7120
    Rei Narikawa
    Department of Life Sciences, Graduate School of Art and Sciences, University of Tokyo, Komaba, Meguro, Tokyo 153 8902, Japan
    Acta Crystallogr Sect F Struct Biol Cryst Commun 65:159-62. 2009
    ..Diffraction data were collected to a resolution of 1.8 A using synchrotron-radiation beamline BL-5A at the Photon Factory...
  20. ncbi request reprint Cyanobacteriochrome TePixJ of Thermosynechococcus elongatus harbors phycoviolobilin as a chromophore
    Takami Ishizuka
    Department of Life Sciences Biology, The University of Tokyo, Komaba 3 8 1, Meguro, Tokyo, Japan
    Plant Cell Physiol 48:1385-90. 2007
    ..The results indicated that the chromophore of TePixJ is not PCB, but its isomer, phycoviolobilin (PVB). It is suggested that the GAF domain of TePixJ has auto-lyase and auto-isomerase activities...
  21. ncbi request reprint Biochemical and functional characterization of a eukaryotic-type protein kinase, SpkB, in the cyanobacterium, Synechocystis sp. PCC 6803
    Ayako Kamei
    Department of Life Sciences Biology, The University of Tokyo, Komaba 3 8 1, Meguro, Tokyo 153 8902, Japan
    Curr Microbiol 46:296-301. 2003
    ..These results suggest that SpkB is the eukaryotic-type protein kinase, which regulates cellular motility via protein phosphorylation like SpkA...
  22. ncbi request reprint Characterization of cyanobacteriochrome TePixJ from a thermophilic cyanobacterium Thermosynechococcus elongatus strain BP-1
    Takami Ishizuka
    Department of Life Sciences Biology, The University of Tokyo, Komaba 3 8 1, Meguro, Tokyo, 153 8902 Japan
    Plant Cell Physiol 47:1251-61. 2006
    ..It is established that TePixJ and SyPixJ1 are novel photoreceptors in cyanobacteria ('cyanobacteriochromes') that are similar, but distinct from the phytochromes and bacteriophytochromes...
  23. doi request reprint Phycobilisome model with novel skeleton-like structures in a glaucocystophyte Cyanophora paradoxa
    Mai Watanabe
    Department of Life Sciences, University of Tokyo, Komaba, Tokyo, Japan
    Biochim Biophys Acta 1817:1428-35. 2012
    ..Based on these findings, structural models for PBS were proposed. This article is part of a Special Issue entitled: Photosynthesis Research for Sustainability: from Natural to Artificial...
  24. doi request reprint Distinct roles of CpcG1-phycobilisome and CpcG2-phycobilisome in state transitions in a cyanobacterium Synechocystis sp. PCC 6803
    Kumiko Kondo
    Department of Biology, The University of Tokyo, Tokyo, Japan
    Photosynth Res 99:217-25. 2009
    ..However, only CpcG1 phycobilisomes are involved in state transitions. This suggests that state transitions require the phycobilisome core...
  25. ncbi request reprint Large-scale analysis of chlorophyll fluorescence kinetics in Synechocystis sp. PCC 6803: identification of the factors involved in the modulation of photosystem stoichiometry
    Hiroshi Ozaki
    Department of Integrated Biosciences, Graduate School of Frontier Sciences, The University of Tokyo, 5 1 5 Kashiwanoha, Kashiwa shi, Chiba, 277 8562, Japan
    Plant Cell Physiol 48:451-8. 2007
    ..Thus, categorization based on the similarity of fluorescence kinetics is an excellent way to identify the function of genes...
  26. doi request reprint Cellulose accumulation and a cellulose synthase gene are responsible for cell aggregation in the cyanobacterium Thermosynechococcus vulcanus RKN
    Yusuke Kawano
    Department of Life Sciences Biology, Graduate School of Arts and Science, University of Tokyo, Tokyo, Japan
    Plant Cell Physiol 52:957-66. 2011
    ..These results suggest that Tvtll0007 encodes a functional cellulose synthase whose activity may not be regulated at the transcriptional level...
  27. doi request reprint Is the photosystem II complex a monomer or a dimer?
    Mai Watanabe
    Department of Life Sciences Biology, Graduate School of Arts and Science, University of Tokyo, Meguro, Tokyo, Japan
    Plant Cell Physiol 50:1674-80. 2009
    ..These results suggest that there are at least two distinct processes of dimerization: (i) PsbTc dependent and (ii) DM induced. We discuss the results with regard to the native assembly form(s) of PSII...
  28. pmc A biliverdin-binding cyanobacteriochrome from the chlorophyll d-bearing cyanobacterium Acaryochloris marina
    Rei Narikawa
    1 Department of Biological Science, Faculty of Science, Shizuoka University, Ohya, Suruga ku, Shizuoka 422 8529, Japan 2 Graduate School of Art and Sciences, University of Tokyo, Komaba, Meguro, Tokyo 153 8902, Japan 3 Precursory Research for Embryonic Science and Technology, Japan Science and Technology Agency, 4 1 8 Honcho Kawaguchi, Saitama 332 0012 Japan
    Sci Rep 5:7950. 2015
    ..marina and is potentially useful as an optogenetic switch and/or fluorescence imager. ..
  29. pmc Cell surface-associated proteins in the filamentous cyanobacterium Anabaena sp. strain PCC 7120
    Hidehisa Yoshimura
    Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, 3 8 1 Komaba, Meguro ku, Tokyo 153 8902, Japan
    Microbes Environ 27:538-43. 2012
    ....
  30. doi request reprint Thiol-based photocycle of the blue and teal light-sensing cyanobacteriochrome Tlr1999
    Gen Enomoto
    Department of Life Sciences Biology, Graduate School of Arts and Sciences, University of Tokyo, Komaba 3 8 1, Meguro, Tokyo 153 8902, Japan
    Biochemistry 51:3050-8. 2012
    ..We propose a thiol-based photocycle, in which the thiol-modified P552 and P420 are intermediate-like forms...
  31. doi request reprint A deletion mutation in the spacing within the psaA core promoter enhances transcription in a cyanobacterium Synechocystis sp. PCC 6803
    Takafumi Midorikawa
    Department of Biological Science, Graduate School of Sciences, The University of Tokyo, Tokyo, Japan
    Plant Cell Physiol 53:164-72. 2012
    ..This is the first study of the spontaneous mutation of a spacer length of a promoter for expression in cyanobacteria...
  32. ncbi request reprint Molecular evolution of PAS domain-containing proteins of filamentous cyanobacteria through domain shuffling and domain duplication
    Rei Narikawa
    Department of Life Sciences Biology, Graduate School of Arts and Sciences, University of Tokyo, Komaba, Meguro ku, Tokyo 153 8902, Japan
    DNA Res 11:69-81. 2004
    ..The conserved PAS domains in the orthologous proteins were analyzed by structural fitting to the known PAS domains. We detected several subclasses with unique sequence features, which will be the target of experimental analysis...
  33. doi request reprint Group 2 sigma factors in cyanobacteria
    Takashi Osanai
    Institute of Molecular and Cellular Biosciences, The University of Tokyo, 113 0032 Tokyo, Japan
    Physiol Plant 133:490-506. 2008
    ..In this article, we give an overview of the composition and evolution of group 2 sigma factors in cyanobacteria and summarize what was presently revealed regarding their function...
  34. ncbi request reprint Response to oxidative stress involves a novel peroxiredoxin gene in the unicellular cyanobacterium Synechocystis sp. PCC 6803
    Mari Kobayashi
    Department of Life Sciences Biology, The University of Tokyo, Komaba, Meguro, Tokyo, 153 8902 Japan
    Plant Cell Physiol 45:290-9. 2004
    ..The binding was enhanced by dithiothreitol and abolished by hydrogen peroxide. We concluded that the Fur homolog, Slr1738, plays a regulatory role in the induction of a potent antioxidant gene, sll1621, in response to oxidative stress...
  35. ncbi request reprint Phototactic motility in the unicellular cyanobacterium Synechocystis sp. PCC 6803
    Shizue Yoshihara
    Department of Life Sciences Biology, The University of Tokyo, 3 8 1, Komaba, Meguro, Tokyo, 153 8902, Japan
    Photochem Photobiol Sci 3:512-8. 2004
    ....
  36. ncbi request reprint Distinct roles of CpcG1 and CpcG2 in phycobilisome assembly in the cyanobacterium Synechocystis sp. PCC 6803
    Kumiko Kondo
    Department of Biological Science, Graduate School of Sciences, University of Tokyo, Komaba, Meguro, Tokyo 153 8902, Japan
    Photosynth Res 84:269-73. 2005
    ..By fluorescence analysis, it was proposed that CpcG2 protein connects the rods with a minor allophycocyanin component, to support energy transfer to Photosystem I...
  37. ncbi request reprint Mutations in a putative chloride efflux transporter gene suppress the chloride requirement of photosystem II in the cytochrome c550-deficient mutant
    Mari Kobayashi
    Department of Life Sciences Biology, The University of Tokyo, Komaba 3 8 1, Meguro, Tokyo, 153 8902 Japan
    Plant Cell Physiol 47:799-804. 2006
    ..The deduced product of slr0753 belongs to a novel group of the superfamily of ion efflux pumps and ion transporters. These results suggest that Slr0753 exports Cl(-) or a related anion, which is essential for PSII oxygen evolution...
  38. pmc Genomic structure of the cyanobacterium Synechocystis sp. PCC 6803 strain GT-S
    Naoyuki Tajima
    Department of Life Sciences, Graduate School of Arts and Sciences, University of Tokyo, Komaba 3 8 1, Meguro ku, Tokyo 153 8902, Japan
    DNA Res 18:393-9. 2011
    ..We have thus become able to provide an accurate genomic sequence of Synechocystis sp. PCC 6803 for future studies on this important cyanobacterial strain...
  39. ncbi request reprint Light-responsive transcriptional regulation of the suf promoters involved in cyanobacterium Synechocystis sp. PCC 6803 Fe-S cluster biogenesis
    Asako Seki
    Institute of Molecular and Cellular Biosciences, The University of Tokyo, 1 1 1 Yayoi, Bunkyo ku, Tokyo 113 0032, Japan
    FEBS Lett 580:5044-8. 2006
    ..We also showed that Thermosynechococcus SufR negatively regulated P1 and PsufR but not P2, in a reconstituted in vitro transcription system using His(6)-tagged RNA polymerase...
  40. ncbi request reprint pilG Gene cluster and split pilL genes involved in pilus biogenesis, motility and genetic transformation in the cyanobacterium Synechocystis sp. PCC 6803
    Shizue Yoshihara
    Department of Life Sciences Biology, University of Tokyo, Komaba 3 8 1, Meguro, Tokyo, 153 8902 Japan
    Plant Cell Physiol 43:513-21. 2002
    ..The genes, thus identified as pil genes in this study, were designated pilG (slr1041), pilH (slr1042), pilI (slr1043), pilJ (slr1044), pilL-N (slr0073) and pilL-C (slr0322)...
  41. ncbi request reprint A suppressor mutation in the alpha-phycocyanin gene in the light/glucose-sensitive phenotype of the psbK-disruptant of the cyanobacterium Synechocystis sp. PCC 6803
    Mari Kobayashi
    Department of Life Sciences Biology, The University of Tokyo, Komaba 3 8 1, Meguro, Tokyo, 153 8902 Japan
    Plant Cell Physiol 46:1561-7. 2005
    ..The inverted repeat generated in cpcA probably led to the early termination of transcription. A possible mechanism for such a mutation is discussed...
  42. doi request reprint Novel supercomplex organization of photosystem I in Anabaena and Cyanophora paradoxa
    Mai Watanabe
    Department of Life Sciences, University of Tokyo, Komaba, Meguro, Tokyo, Japan
    Plant Cell Physiol 52:162-8. 2011
    ..A primitive rhodophyte Cyanidioschyzon merolae had two species of PSI monomeric complex with a light-harvesting Chl complex of a different composition. These results are discussed with regard to the evolution of the PSI supercomplex...
  43. pmc Binding and functional properties of five extrinsic proteins in oxygen-evolving photosystem II from a marine centric diatom, Chaetoceros gracilis
    Ryo Nagao
    Department of Life Sciences Biology, Graduate School of Art and Sciences, University of Tokyo, Komaba, Meguro, Tokyo 153 8902, Japan
    J Biol Chem 285:29191-9. 2010
    ..Based on these results, we proposed a model for the association of the five extrinsic proteins with intrinsic proteins in diatom PSII and compared it with those in PSIIs from the other organisms...
  44. ncbi request reprint Biochemical examination of the potential eukaryotic-type protein kinase genes in the complete genome of the unicellular Cyanobacterium synechocystis sp. PCC 6803
    Ayako Kamei
    Department of Life Sciences, The University of Tokyo, Meguro, Japan
    DNA Res 9:71-8. 2002
    ..Gene-disrupted mutants showed no discernible defect in phenotype except that spkD was apparently essential for survival...
  45. pmc ChlH, the H subunit of the Mg-chelatase, is an anti-sigma factor for SigE in Synechocystis sp. PCC 6803
    Takashi Osanai
    Institute of Molecular and Cellular Biosciences, University of Tokyo, 1 1 1 Yayoi, Bunkyo ku, Tokyo 113 0032, Japan
    Proc Natl Acad Sci U S A 106:6860-5. 2009
    ..Based on these results, we propose a model in which ChlH functions as an anti-sigma factor, transducing light signals to SigE in a process mediated by Mg(2+)...
  46. pmc The membrane-associated CpcG2-phycobilisome in Synechocystis: a new photosystem I antenna
    Kumiko Kondo
    Department of Biological Sciences, University of Tokyo, Tokyo 153 8902, Japan
    Plant Physiol 144:1200-10. 2007
    ..Further sequence analysis revealed that CpcG2-like proteins containing a C-terminal hydrophobic segment are widely distributed in many cyanobacteria...
  47. pmc Three cyanobacteriochromes work together to form a light color-sensitive input system for c-di-GMP signaling of cell aggregation
    Gen Enomoto
    Department of Life Sciences Biology, Graduate School of Arts and Sciences, The University of Tokyo, Meguro, Tokyo 153 8902, Japan
    Proc Natl Acad Sci U S A 112:8082-7. 2015
    ..In addition, SesC seems to improve signaling specificity as an auxiliary backup to SesA/SesB activities. The coordinated action of these three CBCRs highlights why so many different CBCRs exist. ..
  48. doi request reprint A new type of dual-Cys cyanobacteriochrome GAF domain found in cyanobacterium Acaryochloris marina, which has an unusual red/blue reversible photoconversion cycle
    Rei Narikawa
    Department of Life Sciences Biology, Graduate School of Arts and Sciences, University of Tokyo, Komaba 3 8 1, Meguro, Tokyo 153 8902, Japan
    Biochemistry 53:5051-9. 2014
    ..We propose a possible reaction scheme and color-tuning mechanism for AM1_1186 in terms of its structure and its place in a phylogenetic tree. ..
  49. doi request reprint Phycobilisome: architecture of a light-harvesting supercomplex
    Mai Watanabe
    Department of Life Sciences Biology, Graduate School of Arts and Sciences, University of Tokyo, Komaba, Meguro, Tokyo, 153 8902, Japan
    Photosynth Res 116:265-76. 2013
    ..In this review, we discuss the functional and spatial tuning of phycobiliproteins with a focus on linker proteins. ..
  50. ncbi request reprint Improved genetic transformation of the thermophilic cyanobacterium, Thermosynechococcus elongatus BP-1
    Masako Iwai
    Department of Life Sciences Biology, The University of Tokyo, Komaba 3 8 1, Meguro, Tokyo, 153 8902 Japan
    Plant Cell Physiol 45:171-5. 2004
    ..In accordance with the presence of all the homologs of pil genes in Synechocystis sp. PCC 6803, we found that T. elongatus is naturally transformable with exogenous DNA...
  51. pmc CugP is a novel ubiquitous non-GalU-type bacterial UDP-glucose pyrophosphorylase found in cyanobacteria
    Kaisei Maeda
    Department of Life Sciences Biology, Graduate School of Arts and Science, University of Tokyo, Meguro, Tokyo, Japan
    J Bacteriol 196:2348-54. 2014
    ..Based on phylogenetic analysis, this CugP-type UDP-glucose pyrophosphorylase may have recently been horizontally transferred to certain noncyanobacteria. ..
  52. ncbi request reprint A cAMP receptor protein, SYCRP1, is responsible for the cell motility of Synechocystis sp. PCC 6803
    Hidehisa Yoshimura
    Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Komaba, Meguro 153 8902 Japan
    Plant Cell Physiol 43:460-3. 2002
    ..Electron microscopy showed that the sycrp1-deficient strain had a reduced number of thick pili on the cell surface compared with the wild-type strain. It is suggested that cAMP-SYCRP1 complex controls the biogenesis of pili...