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1. Some Cyanobacteria Synthesize Semi-amylopectin Type [alpha]-Polyglucans Instead of Glycogen

Author:
Miyashita, Hideaki,   et al.   ; Nakamura, Yasunori; Takahashi, Jun-ichiro; Sakurai, Aya; Inaba, Yumiko; Suzuki, Eiji; Nihei, Satoko; Fujiwara, Shoko; Tsuzuki, Mikio; Ikemoto, Hisato; Kawachi, Masanobu; Sekiguchi, Hiroshi; Kurano, Norihide;     Show all 13 Authors
Source:
Plant & cell physiology 2005 v.46 no.3 pp. 539-545
ISSN:
0032-0781
Subject:
biosynthesis; glycogen; amylopectin; Cyanobacteria
Abstract:
... It is widely accepted that green plants evolved the capacity to synthesize the highly organized branched [alpha]-polyglucan amylopectin with tandem-cluster structure, whereas animals and bacteria continued to produce random branched glycogen. Although most previous studies documented that cyanobacteria accumulate glycogen, the present study shows explicitly that some cyanobacteria such as Cyanobac ...
DOI:
10.1093/pcp/pci045
PubMed:
15695453

2. Molecular Detection of Epiphytic Acaryochloris spp. on Marine Macroalgae

Author:
Miyashita, Hideaki,   et al.   ; Ohkubo, Satoshi; Murakami, Akio; Takeyama, Haruko; Tsuchiya, Tohru; Mimuro, Mamoru;     Show all 6 Authors
Source:
Applied and environmental microbiology 2006 v.72 no.12 pp. 7912-7915
ISSN:
0099-2240
Subject:
chlorophyll; epiphytes; gel electrophoresis; genes; macroalgae; plastids; ribosomal RNA
Abstract:
... A molecular method for detecting the epiphyte community on marine macroalgae was developed by using PCR-denaturing gradient gel electrophoresis. Selective amplification of 16S rRNA gene fragments from either cyanobacteria or algal plastids improved the detection of minor epiphytes. Two phylotypes of Acaryochloris, a chlorophyll d-containing cyanobacterium, were found not only on red macroalgae but ...
DOI:
10.1128/AEM.01148-06
PubMed:
17028237
PubMed Central:
PMC1694208

3. Identification of the special pair of photosystem II in a chlorophyll d-dominated cyanobacterium

Author:
Miyashita, Hideaki,   et al.   ; Tomo, Tatsuya; Okubo, Tatsunori; Akimoto, Seiji; Yokono, Makio; Tsuchiya, Tohru; Noguchi, Takumi; Mimuro, Mamoru;     Show all 8 Authors
Source:
Proceedings of the National Academy of Sciences of the United States of America 2007 v.104 no.17 pp. 7283-7288
ISSN:
0027-8424
Subject:
polypeptides; chlorophyll; D2 protein; electron transfer; D1 protein; photosystem II; Fourier transform infrared spectroscopy; cytochrome b; Cyanobacteria
Abstract:
... The composition of photosystem II (PSII) in the chlorophyll (Chl) d-dominated cyanobacterium Acaryochloris marina MBIC 11017 was investigated to enhance the general understanding of the energetics of the PSII reaction center. We first purified photochemically active complexes consisting of a 47-kDa Chl protein (CP47), CP43' (PcbC), D1, D2, cytochrome b₅₅₉, PsbI, and a small polypeptide. The pigmen ...
DOI:
10.1073/pnas.0701847104
PubMed:
17431035
PubMed Central:
PMC1851883

4. Niche adaptation and genome expansion in the chlorophyll d-producing cyanobacterium Acaryochloris marina

Author:
Miyashita, Hideaki,   et al.   ; Swingley, Wesley D.; Chen, Min; Cheung, Patricia C.; Conrad, Amber L.; Dejesa, Liza C.; Hao, Jicheng; Honchak, Barbara M.; Karbach, Lauren E.; Kurdoglu, Ahmet; Lahiri, Surobhi; Mastrian, Stephen D.; Page, Lawrence; Ramakrishna, Pushpa; Satoh, Soichirou; Sattley, W. Matthew; Shimada, Yuichiro; Taylor, Heather L.; Tomo, Tatsuya; Tsuchiya, Tohru; Wang, Zi T.; Raymond, Jason; Mimuro, Mamoru; Blankenship, Robert E.; Touchman, Jeffrey W.;     Show all 25 Authors
Source:
Proceedings of the National Academy of Sciences of the United States of America 2008 v.105 no.6 pp. 2005-2010
ISSN:
0027-8424
Subject:
DNA repair; Prochlorococcus; alpha-carotene; autotrophs; biosynthesis; chlorophyll; far-red light; genes; open reading frames; photosynthesis; phycobilin; phycobiliprotein; plasmids; transposons
Abstract:
... Acaryochloris marina is a unique cyanobacterium that is able to produce chlorophyll d as its primary photosynthetic pigment and thus efficiently use far-red light for photosynthesis. Acaryochloris species have been isolated from marine environments in association with other oxygenic phototrophs, which may have driven the niche-filling introduction of chlorophyll d. To investigate these unique adap ...
DOI:
10.1073/pnas.0709772105
PubMed:
18252824
PubMed Central:
PMC2538872

5. Unique photosystems in Acaryochloris marina

Author:
Miyashita, Hideaki,   et al.   ; Ohashi, Shunsuke; Okada, Naoki; Iemura, Tatsuya; Watanabe, Tadashi; Kobayashi, Masami;     Show all 6 Authors
Source:
Photosynthesis research 2008 v.98 no.1-3 pp. 141-149
ISSN:
0166-8595
Subject:
chlorophyll; oxidation; photosystem I; photosystem II; pigments
Abstract:
... A short overview is given on the discovery of the chlorophyll d-dominated cyanobacterium Acaryochloris marina and the minor pigments that function as key components therein. In photosystem I, chlorophyll d′, chlorophyll a, and phylloquinone function as the primary electron donor, the primary electron acceptor and the secondary electron acceptor, respectively. In photosystem II, pheophytin a serves ...
DOI:
10.1007/s11120-008-9383-1
PubMed:
18985431

6. An overview on chlorophylls and quinones in the photosystem I-type reaction centers

Author:
Miyashita, Hideaki,   et al.   ; Ohashi, Shunsuke; Iemura, Tatsuya; Okada, Naoki; Itoh, Shingo; Furukawa, Hayato; Okuda, Masaaki; Ohnishi-Kameyama, Mayumi; Ogawa, Takuro; Watanabe, Tadashi; Itoh, Shigeru; Oh-oka, Hirozo; Inoue, Kazuhito; Kobayashi, Masami;     Show all 14 Authors
Source:
Photosynthesis research 2010 v.104 no.2-3 pp. 305-319
ISSN:
0166-8595
Subject:
menaquinones; phylloquinone; Heliobacteriaceae; naphthoquinones; Chlorobiales; photosynthesis; chlorophyll; chemical structure
Abstract:
... Minor but key chlorophylls (Chls) and quinones in photosystem (PS) I-type reaction centers (RCs) are overviewed in regard to their molecular structures. In the PS I-type RCs, the prime-type chlorophylls, namely, bacteriochlorophyll (BChl) a′ in green sulfur bacteria, BChl g′ in heliobacteria, Chl a′ in Chl a-type PS I, and Chl d′ in Chl d-type PS I, function as the special pairs, either as homodim ...
DOI:
10.1007/s11120-010-9530-3
PubMed:
20165917

7. Prasinoxanthin is absent in the green-colored dinoflagellate Lepidodinium chlorophorum strain NIES-1868: pigment composition and 18S rRNA phylogeny

Author:
Miyashita, Hideaki,   et al.   ; Matsumoto, Takuya; Kawachi, Masanobu; Inagaki, Yuji;     Show all 4 Authors
Source:
Journal of plant research 2012 v.125 no.6 pp. 705-711
ISSN:
0918-9440
Subject:
Dinophyceae; carotenoids; genes; nucleotide sequences; phylogeny; pigments; plastids; ribosomal RNA
Abstract:
... Green-colored plastids in the dinoflagellates Lepidodinium chlorophorum and L. viride have been widely believed as the remnant of an endosymbiotic prasinophyte. This hypothesis for the origin of the Lepidodinium plastids is solely based on an unpublished result quoted in Elbrächter and Schnepf (Phycologia 35:381–393, 1996) hinting at the presence of a characteristic carotenoid in prasinophytes, pr ...
DOI:
10.1007/s10265-012-0486-6
PubMed:
22441568

8. Responses of macroinvertebrate communities to 4 years of deer exclusion in first- and second-order streams

Author:
Miyashita, Hideaki,   et al.   ; Sakai, Masaru; Natuhara, Yosihiro; Fukushima, Keitaro; Naito, Risa; Kato, Makoto; Gomi, Takashi;     Show all 7 Authors
Source:
Freshwater science 2013 v.32 no.2 pp. 563-575
ISSN:
2161-9565
Subject:
browsing; community structure; deer; macroinvertebrates; overland flow; sediments; soil erosion; streams; watersheds
Abstract:
... We compared hydrological environments and macroinvertebrate communities in 1ˢᵗ- and 2ⁿᵈ-order streams between a deer-excluded catchment (EC) and a control catchment (CC) to test effects of deer-induced hillslope soil erosion and sedimentation on macroinvertebrates. Overland flow contribution to the streams was greater in CC than in EC, and substrate in 1ˢᵗ-order streams contained more fine sedimen ...
DOI:
10.1899/12-116.1

9. Composition of carotenoids and identification of aerial microalgae isolated from the surface of rocks in mountainous districts of Japan

Author:
Miyashita, Hideaki,   et al.   ; Aburai, Nobuhiro; Ohkubo, Satoshi; Abe, Katsuya;     Show all 4 Authors
Source:
Algal research 2013 v.2 no.3 pp. 237-243
ISSN:
2211-9264
Subject:
Eustigmatophyceae; Scenedesmus; astaxanthin; beta-carotene; biosynthesis; canthaxanthin; chlorophyll; esters; light intensity; lutein; microalgae; ribosomal DNA; rocks; violaxanthin; zeaxanthin; Japan
Abstract:
... Four aerial microalgae were isolated from the surface of rocks in mountainous districts of Japan and identified as Scenedesmus sp. KGU-Y002, Scenedesmus sp. KGU-D002, and Coelastrella sp. KGU-H001 of the class Chlorophyceae and Vischeria helvetica KGU-Y001 of the class Eustigmatophyceae based on 18S rDNA analysis. Algal carotenogenesis was enhanced by increasing the light intensity from 40 to 214μ ...
DOI:
10.1016/j.algal.2013.03.001

10. Quantum Requirement of Photosynthesis in the Primarily Chlorophyll d Containing Prokaryote Acaryochloris marina

Author:
Miyashita, Hideaki,   et al.   ; Miyachi, Shigetoh; Strassdat, Kerstin; Senger, Horst;     Show all 4 Authors
Source:
Zeitschrift für Naturforschung 2014 v.52 no.9-10 pp. 636-638
ISSN:
1865-7125
Subject:
absorption; chlorophyll; energy transfer; oxygen production; photosynthesis; phycocyanin; prokaryotic cells; zeaxanthin
Abstract:
... The recently isolated and characterized unicellular photosynthetic prokaryote Acaryochloris marina (Miyashita et al., 1996) contains chlorophylls a, d , and traces of a chlorophyll c-like pigment as well as phycocyanin. a type of allophycocyanin, zeaxanthin and cx-carotene, chlorophyll d being the predominant chlorophyll component. Quantum requirement measurements of the photosynthetic oxygen evol ...
DOI:
10.1515/znc-1997-9-1010

11. Multiple losses of photosynthesis in Nitzschia (Bacillariophyceae)

Author:
Miyashita, Hideaki,   et al.   ; Kamikawa, Ryoma; Yubuki, Naoji; Yoshida, Masaki; Taira, Misaka; Nakamura, Noriaki; Ishida, Ken‐ichiro; Leander, Brian S.; Hashimoto, Tetsuo; Mayama, Shigeki; Inagaki, Yuji;     Show all 11 Authors
Source:
Phycological research 2015 v.63 no.1 pp. 19-28
ISSN:
1322-0829
Subject:
Nitzschia; chlorophyll; fluorescence microscopy; genes; lifestyle; monophyly; nutrition; photosynthesis; ribosomal RNA; thylakoids; transmission electron microscopy
Abstract:
... In order to obtain insights into the evolution of colorless (apochlorotic) diatoms, we investigated newly established apochlorotic strains of Nitzschia spp. using light and electron microscopy and molecular phylogenetic analyses. Fluorescence microscopic observations demonstrated that the apochlorotic diatoms lack chlorophylls. Transmission electron microscopy of two apochlorotic strains also demo ...
DOI:
10.1111/pre.12072

12. Plastid Genome-Based Phylogeny Pinpointed the Origin of the Green-Colored Plastid in the Dinoflagellate Lepidodinium chlorophorum

Author:
Miyashita, Hideaki,   et al.   ; Kamikawa, Ryoma; Tanifuji, Goro; Kawachi, Masanobu; Hashimoto, Tetsuo; Inagaki, Yuji;     Show all 6 Authors
Source:
Genome Biology and Evolution 2015 v.7 no.4 pp. 1133-1140
Subject:
Chlorophyta; Miozoa; autotrophs; biosynthesis; carotenoids; endosymbionts; genes; metabolites; photosynthesis; phylogeny; plastid genome; plastids; proteins; symbiosis
Abstract:
... Unlike many other photosynthetic dinoflagellates, whose plastids contain a characteristic carotenoid peridinin, members of the genus Lepidodinium are the only known dinoflagellate species possessing green alga-derived plastids. However, the precise origin of Lepidodinium plastids has hitherto remained uncertain. In this study, we completely sequenced the plastid genome of Lepidodinium chlorophorum ...
DOI:
10.1093/gbe/evv060
PubMed:
25840416
PubMed Central:
PMC4419806

13. Unique chlorophylls in picoplankton Prochlorococcus sp. “Physicochemical properties of divinyl chlorophylls, and the discovery of monovinyl chlorophyll b as well as divinyl chlorophyll b in the species Prochlorococcus NIES-2086”

Author:
Miyashita, Hideaki,   et al.   ; Komatsu, Hirohisa; Wada, Katsuhiro; Kanjoh, Terumitsu; Sato, Mayumi; Kawachi, Masanobu; Kobayashi, Masami;     Show all 7 Authors
Source:
Photosynthesis research 2016 v.130 no.1-3 pp. 445-467
ISSN:
0166-8595
Subject:
Prochlorococcus; absorption; chlorophyll; circular dichroism spectroscopy; fluorescence; ions; nuclear magnetic resonance spectroscopy; photosystem I; photosystem II; redox potential; reversed-phase high performance liquid chromatography; solvents
Abstract:
... In this review, we introduce our recent studies on divinyl chlorophylls functioning in unique marine picoplankton Prochlorococcus sp. (1) Essential physicochemical properties of divinyl chlorophylls are compared with those of monovinyl chlorophylls; separation by normal-phase and reversed-phase high-performance liquid chromatography with isocratic eluent mode, absorption spectra in four organic so ...
DOI:
10.1007/s11120-016-0283-5

14. Biofilm-based photobioreactor absorbing water and nutrients by capillary action

Author:
Miyashita, Hideaki,   et al.   ; Hamano, Hayato; Nakamura, Shun; Hayakawa, Jumpei; Harayama, Shigeaki;     Show all 5 Authors
Source:
Bioresource technology 2017 v.223 pp. 307-311
ISSN:
0960-8524
Subject:
Chlorophyta; air; biomass production; bioreactors; capillarity; carbon dioxide; light intensity; mixing; nutrients; polytetrafluoroethylene
Abstract:
... Cells of the unicellular green alga, “Pseudochoricystis ellipsoidea”, were uniformly spread on a cellulosic sheet or on a polytetrafluoroethylene (PTFE) membrane sheet superimposed on a cellulosic sheet at a density of 3.5–5.0gdry weight per m2, and the sheet was adhered to an inverted V-shaped acrylic plate of 10cm in height. Several acrylic plates were placed side by side on a tray containing li ...
DOI:
10.1016/j.biortech.2016.10.088

15. Salt-stress and plant hormone-like responses for selective reactions of esterified xanthophylls in the aerial microalga Coelastrella sp. KGU-Y002

Author:
Miyashita, Hideaki,   et al.   ; Saeki, Kazeaki; Aburai, Nobuhiro; Aratani, Shogo; Abe, Katsuya;     Show all 5 Authors
Source:
Journal of applied phycology 2017 v.29 no.1 pp. 115-122
ISSN:
0921-8971
Subject:
Scenedesmaceae; abscisic acid; astaxanthin; bioactive properties; biosynthesis; cations; esterification; lutein; microalgae; potassium chloride; reactive oxygen species; salt stress; zeaxanthin
Abstract:
... Esterification of xanthophylls is important for improving their bioactive potency. The effects of metal cations on esterified xanthophyll biosynthesis and on the accumulation and composition of salt stress-induced carotenoids were investigated in the aerial microalga Coelastrella sp. KGU-Y002 (Chlorophyta, Scenedesmaceae). Under nitrogen-deficient and high-light conditions, salt-supplemented cultu ...
DOI:
10.1007/s10811-016-0911-7

16. Symbiotic green algae in eggs of Hynobius nigrescens, an amphibian endemic to Japan

Author:
Miyashita, Hideaki,   et al.   ; Muto, Kiyoaki; Nishikawa, Kanto; Kamikawa, Ryoma;     Show all 4 Authors
Source:
Phycological research 2017 v.65 no.2 pp. 171-174
ISSN:
1322-0829
Subject:
Hynobius; Oophila; algae; amphibians; cell walls; color; eggs; hatching; microscopy; nucleotide sequences; phylogeny; ribosomal RNA; symbionts; symbiosis; Japan; North America
Abstract:
... The egg capsules of some amphibians' eggs are known to become green colored before hatching. This is due to the increase of green symbionts in the egg capsule surrounding the embryo. The green symbionts in North American amphibian eggs were reported to be unicellular green algae in the Oophila‐clade of Volvocales, Chlorophyceae. However, it remains unclear whether this is also the case in other pa ...
DOI:
10.1111/pre.12173

17. Diversity of Organellar Genomes in Non-photosynthetic Diatoms

Author:
Miyashita, Hideaki,   et al.   ; Kamikawa, Ryoma; Azuma, Tomonori; Ishii, Ken-ichiro; Matsuno, Yusei;     Show all 5 Authors
Source:
Protist 2018 v.169 no.3 pp. 351-361
ISSN:
1434-4610
Subject:
H+/K+-exchanging ATPase; H-transporting ATP synthase; Nitzschia; RNA; biosynthesis; gene deletion; genes; mitochondrial genome; nutrient requirements; photosynthesis; plastid genome; thiamin
Abstract:
... We determined the complete sequences of the plastid and mitochondrial genomes of three non-photosynthetic Nitzschia spp., as well as those of a photosynthetic close relative, Nitzschia palea. All the plastid genomes and the three mitochondrial genomes determined were found to be circularly mapping, and the other mitochondrial genomes were predicted to be of a linear form with telomere-like structu ...
DOI:
10.1016/j.protis.2018.04.009