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  • Articles  (46)
  • American Geophysical Union  (26)
  • American Association for the Advancement of Science (AAAS)  (20)
  • 2015-2019  (22)
  • 2010-2014  (24)
  • Chemistry and Pharmacology  (46)
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  • Articles  (46)
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  • 1
    Publication Date: 2010-12-15
    Description: Insulin-like growth factor 1 (IGF-1) induces skeletal muscle maturation and enlargement (hypertrophy). These responses require protein synthesis and myofibril formation (myofibrillogenesis). However, the signaling mechanisms of myofibrillogenesis remain obscure. We found that IGF-1-induced phosphatidylinositol 3-kinase-Akt signaling formed a complex of nebulin and N-WASP at the Z bands of myofibrils by interfering with glycogen synthase kinase-3beta in mice. Although N-WASP is known to be an activator of the Arp2/3 complex to form branched actin filaments, the nebulin-N-WASP complex caused actin nucleation for unbranched actin filament formation from the Z bands without the Arp2/3 complex. Furthermore, N-WASP was required for IGF-1-induced muscle hypertrophy. These findings present the mechanisms of IGF-1-induced actin filament formation in myofibrillogenesis required for muscle maturation and hypertrophy and a mechanism of actin nucleation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Takano, Kazunori -- Watanabe-Takano, Haruko -- Suetsugu, Shiro -- Kurita, Souichi -- Tsujita, Kazuya -- Kimura, Sumiko -- Karatsu, Takashi -- Takenawa, Tadaomi -- Endo, Takeshi -- New York, N.Y. -- Science. 2010 Dec 10;330(6010):1536-40. doi: 10.1126/science.1197767.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Graduate School of Science, Chiba University, 1-33 Yayoicho, Inageku, Chiba 263-8522, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21148390" target="_blank"〉PubMed〈/a〉
    Keywords: Actin Cytoskeleton/*metabolism ; Actins/*metabolism ; Animals ; COS Cells ; Cercopithecus aethiops ; Hypertrophy ; Insulin-Like Growth Factor I/*metabolism ; Mice ; Mice, Inbred ICR ; *Muscle Development ; Muscle Proteins/chemistry/*metabolism ; Muscle, Skeletal/metabolism/pathology ; Myofibrils/metabolism ; Phosphatidylinositol 3-Kinase/metabolism ; Protein Binding ; Protein Interaction Domains and Motifs ; Proto-Oncogene Proteins c-akt/metabolism ; RNA Interference ; Sarcomeres/*metabolism ; Signal Transduction ; Wiskott-Aldrich Syndrome Protein, Neuronal/chemistry/*metabolism ; src Homology Domains
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  • 2
    Publication Date: 2010-08-14
    Description: A hallmark of mitosis is the appearance of high levels of histone phosphorylation, yet the roles of these modifications remain largely unknown. Here, we demonstrate that histone H3 phosphorylated at threonine 3 is directly recognized by an evolutionarily conserved binding pocket in the BIR domain of Survivin, which is a member of the chromosomal passenger complex (CPC). This binding mediates recruitment of the CPC to chromosomes and the resulting activation of its kinase subunit Aurora B. Consistently, modulation of the kinase activity of Haspin, which phosphorylates H3T3, leads to defects in the Aurora B-dependent processes of spindle assembly and inhibition of nuclear reformation. These findings establish a direct cellular role for mitotic histone H3T3 phosphorylation, which is read and translated by the CPC to ensure accurate cell division.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3177562/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3177562/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kelly, Alexander E -- Ghenoiu, Cristina -- Xue, John Z -- Zierhut, Christian -- Kimura, Hiroshi -- Funabiki, Hironori -- GM075249/GM/NIGMS NIH HHS/ -- R01 GM075249/GM/NIGMS NIH HHS/ -- R01 GM075249-01/GM/NIGMS NIH HHS/ -- R01 GM075249-02/GM/NIGMS NIH HHS/ -- R01 GM075249-03/GM/NIGMS NIH HHS/ -- R01 GM075249-04/GM/NIGMS NIH HHS/ -- R01 GM075249-05/GM/NIGMS NIH HHS/ -- R01 GM075249-05S1/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2010 Oct 8;330(6001):235-9. doi: 10.1126/science.1189505. Epub 2010 Aug 12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Chromosome and Cell Biology, The Rockefeller University, New York, NY 10065, USA. akelly@rockefeller.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20705815" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aurora Kinases ; Cell Division ; Centromere/metabolism ; Chromatin/metabolism ; Chromosomal Proteins, Non-Histone/metabolism ; Chromosomes/*metabolism ; Enzyme Activation ; Histones/*metabolism ; *Mitosis ; Molecular Sequence Data ; Phosphorylation ; Protein Binding ; Protein Interaction Domains and Motifs ; Protein-Serine-Threonine Kinases/*metabolism ; Spindle Apparatus/metabolism ; Threonine/metabolism ; Xenopus Proteins/chemistry/*metabolism ; Xenopus laevis
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  • 3
    Publication Date: 2010-12-15
    Description: We identified a strong temporal correlation between three distinct types of slow earthquakes distributed over 100 kilometers along the dip of the subducting oceanic plate at the western margin of the Nankai megathrust rupture zone, southwest Japan. In 2003 and 2010, shallow very-low-frequency earthquakes near the Nankai trough as well as nonvolcanic tremor at depths of 30 to 40 kilometers were triggered by the acceleration of a long-term slow slip event in between. This correlation suggests that the slow slip might extend along-dip between the source areas of deeper and shallower slow earthquakes and thus could modulate the stress buildup on the adjacent megathrust rupture zone.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hirose, Hitoshi -- Asano, Youichi -- Obara, Kazushige -- Kimura, Takeshi -- Matsuzawa, Takanori -- Tanaka, Sachiko -- Maeda, Takuto -- New York, N.Y. -- Science. 2010 Dec 10;330(6010):1502. doi: 10.1126/science.1197102.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉National Research Institute for Earth Science and Disaster Prevention, 3-1 Tennodai, Tsukuba, Ibaraki 305-0006, Japan. hirose@bosai.go.jp〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21148384" target="_blank"〉PubMed〈/a〉
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  • 4
    Publication Date: 2011-08-27
    Description: The Hayabusa spacecraft successfully recovered dust particles from the surface of near-Earth asteroid 25143 Itokawa. Synchrotron-radiation x-ray diffraction and transmission and scanning electron microscope analyses indicate that the mineralogy and mineral chemistry of the Itokawa dust particles are identical to those of thermally metamorphosed LL chondrites, consistent with spectroscopic observations made from Earth and by the Hayabusa spacecraft. Our results directly demonstrate that ordinary chondrites, the most abundant meteorites found on Earth, come from S-type asteroids. Mineral chemistry indicates that the majority of regolith surface particles suffered long-term thermal annealing and subsequent impact shock, suggesting that Itokawa is an asteroid made of reassembled pieces of the interior portions of a once larger asteroid.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nakamura, Tomoki -- Noguchi, Takaaki -- Tanaka, Masahiko -- Zolensky, Michael E -- Kimura, Makoto -- Tsuchiyama, Akira -- Nakato, Aiko -- Ogami, Toshihiro -- Ishida, Hatsumi -- Uesugi, Masayuki -- Yada, Toru -- Shirai, Kei -- Fujimura, Akio -- Okazaki, Ryuji -- Sandford, Scott A -- Ishibashi, Yukihiro -- Abe, Masanao -- Okada, Tatsuaki -- Ueno, Munetaka -- Mukai, Toshifumi -- Yoshikawa, Makoto -- Kawaguchi, Junichiro -- New York, N.Y. -- Science. 2011 Aug 26;333(6046):1113-6. doi: 10.1126/science.1207758.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Earth and Planetary Material Sciences, Faculty of Science, Tohoku University, Aoba, Sendai, Miyagi 980-8578, Japan. tomoki@m.tohoku.ac.jp〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21868667" target="_blank"〉PubMed〈/a〉
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  • 5
    Publication Date: 2011-08-27
    Description: The reflectance spectra of the most abundant meteorites, ordinary chondrites, are different from those of the abundant S-type (mnemonic for siliceous) asteroids. This discrepancy has been thought to be due to space weathering, which is an alteration of the surfaces of airless bodies exposed to the space environment. Here we report evidence of space weathering on particles returned from the S-type asteroid 25143 Itokawa by the Hayabusa spacecraft. Surface modification was found in 5 out of 10 particles, which varies depending on mineral species. Sulfur-bearing Fe-rich nanoparticles exist in a thin (5 to 15 nanometers) surface layer on olivine, low-Ca pyroxene, and plagioclase, which is suggestive of vapor deposition. Sulfur-free Fe-rich nanoparticles exist deeper inside (〈60 nanometers) ferromagnesian silicates. Their texture suggests formation by metamictization and in situ reduction of Fe(2+).〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Noguchi, T -- Nakamura, T -- Kimura, M -- Zolensky, M E -- Tanaka, M -- Hashimoto, T -- Konno, M -- Nakato, A -- Ogami, T -- Fujimura, A -- Abe, M -- Yada, T -- Mukai, T -- Ueno, M -- Okada, T -- Shirai, K -- Ishibashi, Y -- Okazaki, R -- New York, N.Y. -- Science. 2011 Aug 26;333(6046):1121-5. doi: 10.1126/science.1207794.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉College of Science, Ibaraki University, 2-1-1 Bunkyo, Mito, Ibaraki 310-8512, Japan. tngc@mx.ibaraki.ac.jp〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21868670" target="_blank"〉PubMed〈/a〉
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  • 6
    Publication Date: 2012-05-05
    Description: Frustrated magnetic materials, in which local conditions for energy minimization are incompatible because of the lattice structure, can remain disordered to the lowest temperatures. Such is the case for Ba(3)CuSb(2)O(9), which is magnetically anisotropic at the atomic scale but curiously isotropic on mesoscopic length and time scales. We find that the frustration of Wannier's Ising model on the triangular lattice is imprinted in a nanostructured honeycomb lattice of Cu(2+) ions that resists a coherent static Jahn-Teller distortion. The resulting two-dimensional random-bond spin-1/2 system on the honeycomb lattice has a broad spectrum of spin-dimer-like excitations and low-energy spin degrees of freedom that retain overall hexagonal symmetry.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nakatsuji, S -- Kuga, K -- Kimura, K -- Satake, R -- Katayama, N -- Nishibori, E -- Sawa, H -- Ishii, R -- Hagiwara, M -- Bridges, F -- Ito, T U -- Higemoto, W -- Karaki, Y -- Halim, M -- Nugroho, A A -- Rodriguez-Rivera, J A -- Green, M A -- Broholm, C -- New York, N.Y. -- Science. 2012 May 4;336(6081):559-63. doi: 10.1126/science.1212154.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan. satoru@issp.u-tokyo.ac.jp〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22556246" target="_blank"〉PubMed〈/a〉
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  • 7
    Publication Date: 2014-05-17
    Description: A switchlike response in nuclear factor-kappaB (NF-kappaB) activity implies the existence of a threshold in the NF-kappaB signaling module. We show that the CARD-containing MAGUK protein 1 (CARMA1, also called CARD11)-TAK1 (MAP3K7)-inhibitor of NF-kappaB (IkappaB) kinase-beta (IKKbeta) module is a switch mechanism for NF-kappaB activation in B cell receptor (BCR) signaling. Experimental and mathematical modeling analyses showed that IKK activity is regulated by positive feedback from IKKbeta to TAK1, generating a steep dose response to BCR stimulation. Mutation of the scaffolding protein CARMA1 at serine-578, an IKKbeta target, abrogated not only late TAK1 activity, but also the switchlike activation of NF-kappaB in single cells, suggesting that phosphorylation of this residue accounts for the feedback.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shinohara, Hisaaki -- Behar, Marcelo -- Inoue, Kentaro -- Hiroshima, Michio -- Yasuda, Tomoharu -- Nagashima, Takeshi -- Kimura, Shuhei -- Sanjo, Hideki -- Maeda, Shiori -- Yumoto, Noriko -- Ki, Sewon -- Akira, Shizuo -- Sako, Yasushi -- Hoffmann, Alexander -- Kurosaki, Tomohiro -- Okada-Hatakeyama, Mariko -- 5R01CA141722/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2014 May 16;344(6185):760-4. doi: 10.1126/science.1250020.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory for Integrated Cellular Systems, RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan. ; Signaling Systems Laboratory, Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA 92093, USA. Institute for Quantitative and Computational Biosciences (QC Bio) and Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, Los Angeles, CA 90025, USA. ; Laboratory for Cell Signaling Dynamics, RIKEN Quantitative Biology Center (QBiC), 6-2-3, Furuedai, Suita, Osaka 565-0874, Japan. Cellular Informatics Laboratory, RIKEN, 2-1 Hirosawa, Wako 351-0198, Japan. ; Laboratory for Lymphocyte Differentiation, RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan. ; Graduate School of Engineering, Tottori University 4-101, Koyama-minami, Tottori 680-8552, Japan. ; Laboratory of Host Defense, WPI Immunology Frontier Research Center, Osaka University, 3-1 Yamada-oka, Suita, Osaka 565-0871, Japan. ; Cellular Informatics Laboratory, RIKEN, 2-1 Hirosawa, Wako 351-0198, Japan. ; Signaling Systems Laboratory, Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA 92093, USA. Institute for Quantitative and Computational Biosciences (QC Bio) and Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, Los Angeles, CA 90025, USA. ahoffmann@ucla.edu kurosaki@rcai.riken.jp marikoh@rcai.riken.jp. ; Laboratory for Lymphocyte Differentiation, RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan. Laboratory for Lymphocyte Differentiation, WPI Immunology Frontier Research Center, Osaka University, 3-1 Yamada-oka, Suita, Osaka 565-0871, Japan. ahoffmann@ucla.edu kurosaki@rcai.riken.jp marikoh@rcai.riken.jp. ; Laboratory for Integrated Cellular Systems, RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan. ahoffmann@ucla.edu kurosaki@rcai.riken.jp marikoh@rcai.riken.jp.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24833394" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; B-Lymphocytes/metabolism ; CARD Signaling Adaptor Proteins/genetics/*metabolism ; Cell Line ; Chickens ; Feedback, Physiological ; Guanylate Cyclase/genetics/*metabolism ; I-kappa B Kinase/*metabolism ; MAP Kinase Kinase Kinases/genetics/*metabolism ; Mice ; Mice, Knockout ; Mutation ; NF-kappa B/*agonists ; Phosphorylation ; Receptors, Antigen, B-Cell/genetics/*metabolism ; Serine/genetics/metabolism ; Signal Transduction
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  • 8
    Publication Date: 2014-09-27
    Description: Jupiter's magnetosphere is a strong particle accelerator that contains ultrarelativistic electrons in its inner part. They are thought to be accelerated by whistler-mode waves excited by anisotropic hot electrons (〉10 kiloelectron volts) injected from the outer magnetosphere. However, electron transportation in the inner magnetosphere is not well understood. By analyzing the extreme ultraviolet line emission from the inner magnetosphere, we show evidence for global inward transport of flux tubes containing hot plasma. High-spectral-resolution scanning observations of the Io plasma torus in the inner magnetosphere enable us to generate radial profiles of the hot electron fraction. It gradually decreases with decreasing radial distance, despite the short collisional time scale that should thermalize them rapidly. This indicates a fast and continuous resupply of hot electrons responsible for exciting the whistler-mode waves.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yoshioka, K -- Murakami, G -- Yamazaki, A -- Tsuchiya, F -- Kimura, T -- Kagitani, M -- Sakanoi, T -- Uemizu, K -- Kasaba, Y -- Yoshikawa, I -- Fujimoto, M -- New York, N.Y. -- Science. 2014 Sep 26;345(6204):1581-4. doi: 10.1126/science.1256259.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara, Japan. kazuo@stp.isas.jaxa.jp. ; Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara, Japan. ; Planetary Plasma and Atmospheric Research Center, Tohoku University, Sendai, Japan. ; Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara, Japan. National Astronomical Observatory of Japan, Mitaka, Japan. ; Department of Geophysics, Tohoku University, Sendai, Japan. ; Department of Earth and Planetary Science, University of Tokyo, Tokyo, Japan. ; Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara, Japan. Earth-Life Science Institute, Tokyo Institute of Technology, Tokyo, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25258073" target="_blank"〉PubMed〈/a〉
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  • 9
    Publication Date: 2010-07-10
    Description: Determining the structure of subduction zones is important for understanding mechanisms for the generation of interplate phenomena such as megathrust earthquakes. The peeling off of the uppermost part of a subducting slab and accretion to the bottom of an overlying plate (underplating) at deep regions has been inferred from exhumed metamorphic rocks and deep seismic imaging, but direct seismic evidence of this process is lacking. By comparing seismic reflection profiles with microearthquake distributions in central Japan, we show that repeating microearthquakes occur along the bottom interface of the layer peeling off from the subducting Philippine Sea plate. This region coincides with the location of slow-slip events that may serve as signals for monitoring active underplating.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kimura, Hisanori -- Takeda, Tetsuya -- Obara, Kazushige -- Kasahara, Keiji -- New York, N.Y. -- Science. 2010 Jul 9;329(5988):210-2. doi: 10.1126/science.1187115.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉National Research Institute for Earth Science and Disaster Prevention (NIED), 3-1 Tennodai, Tsukuba, Ibaraki 305-0006, Japan. kimura@bosai.go.jp〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20616277" target="_blank"〉PubMed〈/a〉
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  • 10
    Publication Date: 2011-09-03
    Description: A deeper mechanistic understanding of the saccharification of cellulosic biomass could enhance the efficiency of biofuels development. We report here the real-time visualization of crystalline cellulose degradation by individual cellulase enzymes through use of an advanced version of high-speed atomic force microscopy. Trichoderma reesei cellobiohydrolase I (TrCel7A) molecules were observed to slide unidirectionally along the crystalline cellulose surface but at one point exhibited collective halting analogous to a traffic jam. Changing the crystalline polymorphic form of cellulose by means of an ammonia treatment increased the apparent number of accessible lanes on the crystalline surface and consequently the number of moving cellulase molecules. Treatment of this bulky crystalline cellulose simultaneously or separately with T. reesei cellobiohydrolase II (TrCel6A) resulted in a remarkable increase in the proportion of mobile enzyme molecules on the surface. Cellulose was completely degraded by the synergistic action between the two enzymes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Igarashi, Kiyohiko -- Uchihashi, Takayuki -- Koivula, Anu -- Wada, Masahisa -- Kimura, Satoshi -- Okamoto, Tetsuaki -- Penttila, Merja -- Ando, Toshio -- Samejima, Masahiro -- New York, N.Y. -- Science. 2011 Sep 2;333(6047):1279-82. doi: 10.1126/science.1208386.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biomaterial Sciences, Graduate School of Agricultural and Life Sciences, University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan. aquarius@mail.ecc.u-tokyo.ac.jp〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21885779" target="_blank"〉PubMed〈/a〉
    Keywords: Adsorption ; Biomass ; Cellobiose/metabolism ; Cellulose/chemistry/*metabolism ; Cellulose 1,4-beta-Cellobiosidase/*metabolism ; Crystallization ; Hydrolysis ; Kinetics ; Microscopy, Atomic Force ; Trichoderma/enzymology
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