1
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Murata H, Nozawa K, Suzuki T, Kado Y, Suemasu T, Toko K. Si 1-xGe x anode synthesis on plastic films for flexible rechargeable batteries. Sci Rep 2022; 12:13779. [PMID: 35962140 PMCID: PMC9374656 DOI: 10.1038/s41598-022-18072-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 08/04/2022] [Indexed: 11/09/2022] Open
Abstract
SiGe is a promising anode material for replacing graphite in next generation thin-film batteries owing to its high theoretical charge/discharge capacity. Metal-induced layer exchange (LE) is a unique technique used for the low-temperature synthesis of SiGe layers on arbitrary substrates. Here, we demonstrate the synthesis of Si1-xGex (x = 0-1) layers on plastic films using Al-induced LE. The resulting SiGe layers exhibited high electrical conductivity (up to 1200 S cm-1), reflecting the self-organized doping effect of LE. Moreover, the Si1-xGex layer synthesized by the same process was adopted as the anode for the lithium-ion battery. All Si1-xGex anodes showed clear charge/discharge operation and high coulombic efficiency (≥ 97%) after 100 cycles. While the discharge capacities almost reflected the theoretical values at each x at 0.1 C, the capacity degradation with increasing current rate strongly depended on x. Si-rich samples exhibited high initial capacity and low capacity retention, while Ge-rich samples showed contrasting characteristics. In particular, the Si1-xGex layers with x ≥ 0.8 showed excellent current rate performance owing to their high electrical conductivity and low volume expansion, maintaining a high capacity (> 500 mAh g-1) even at a high current rate (10 C). Thus, we revealed the relationship between SiGe composition and anode characteristics for the SiGe layers formed by LE at low temperatures. These results will pave the way for the next generation of flexible batteries based on SiGe anodes.
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Affiliation(s)
- H Murata
- Device Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Umezono, Tsukuba, Ibaraki, 305-8568, Japan.
| | - K Nozawa
- Institute of Applied Physics, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8573, Japan
| | - T Suzuki
- Institute of Applied Physics, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8573, Japan
| | - Y Kado
- Energy Process Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, Ibaraki, 305-8569, Japan
| | - T Suemasu
- Institute of Applied Physics, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8573, Japan
| | - K Toko
- Institute of Applied Physics, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8573, Japan.
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2
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Shima T, Kaga C, Shimamoto K, Sugimoto T, Kado Y, Watanabe O, Suwa T, Amamoto R, Tsuji H, Matsumoto S. Characteristics of gut microbiome, organic acid profiles and viral antibody indexes of healthy Japanese with live Lacticaseibacillus detected in stool. Benef Microbes 2022; 13:33-46. [PMID: 35144523 DOI: 10.3920/bm2021.0101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
To estimate the health-promoting effects of Lacticaseibacillus paracasei (previously Lactobacillus casei) strain Shirota (LcS) that reached the lower gastrointestinal tract alive, we investigated the characteristics of gut microbiome, organic acid profiles, defecatory symptoms and serum viral antibody indexes of healthy Japanese adults between the group in whom live LcS was detected or not from stool. The β-diversity index of the gut microbiome constituted a significant difference between the live-LcS-detected-group (LLD) and the live-LcS-not-detected-group (LLnD). In the LLD, the Bifidobacteriaceae, Lactobacillaceae, and Coriobacteriaceae counts were significantly higher, and the succinate concentration was significantly lower than that in the LLnD. The serum herpes simplex virus (HSV) immunoglobulin (Ig)M antibody index in the LLD tended to be lower than that of the LLnD in HSV IgG-positive subjects. Of the LLD, those in the fermented milk products containing LcS (FML)-high-frequency-group (FML-HF) and those in the FML-low-frequency-group (FML-LF) had different gut microbiome and organic acid profiles. However, the pattern of differences between FML-HF and FML-LF was dissimilar those between LLD and LLnD. In contrast, among subjects with FML-LF, those in the group with LLD in stool (LF-LLD) and those in the LLnD in stool (LF-LLnD) showed a similar pattern of differences in their gut microbiome and organic acid profiles as those in the LLnD and LLD. The LLD and LF-LLD commonly had lower caloric and carbohydrate intakes from the diet than their respective control groups. In this study, we found that the presence of live LcS in stool is associated with a healthy gut environment and inhibition of the reactivation of latently infected viruses in the host. However, these health-promoting effects on the host were not related to the frequency of FML intake. Furthermore, dysbiosis of the gut microbiome and diet including caloric intake was related to the viability of ingested LcS in the gut.
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Affiliation(s)
- T Shima
- Yakult Central Institute, 5-11 Izumi, Kunitachi-shi, Tokyo 186-8650, Japan
| | - C Kaga
- Yakult Central Institute, 5-11 Izumi, Kunitachi-shi, Tokyo 186-8650, Japan
| | - K Shimamoto
- Yakult Central Institute, 5-11 Izumi, Kunitachi-shi, Tokyo 186-8650, Japan
| | - T Sugimoto
- Yakult Central Institute, 5-11 Izumi, Kunitachi-shi, Tokyo 186-8650, Japan
| | - Y Kado
- Yakult Central Institute, 5-11 Izumi, Kunitachi-shi, Tokyo 186-8650, Japan
| | - O Watanabe
- Yakult Honsha Co. Ltd., Development Department, 1-10-30 Kaigan, Minato-ku, Tokyo 105-8660, Japan
| | - T Suwa
- Yakult Central Institute, 5-11 Izumi, Kunitachi-shi, Tokyo 186-8650, Japan
| | - R Amamoto
- Yakult Central Institute, 5-11 Izumi, Kunitachi-shi, Tokyo 186-8650, Japan
| | - H Tsuji
- Yakult Central Institute, 5-11 Izumi, Kunitachi-shi, Tokyo 186-8650, Japan
| | - S Matsumoto
- Yakult Central Institute, 5-11 Izumi, Kunitachi-shi, Tokyo 186-8650, Japan
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3
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Miyagi C, Karimov J, Kado Y, Ray D, Polakowski T, Ahmad M, Karamlow T, Najm H, Fukamachi K. Initial Fitting Study of a Pediatric Continuous-Flow Total Artificial Heart. J Heart Lung Transplant 2021. [DOI: 10.1016/j.healun.2021.01.511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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4
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Karimov J, Miyamoto T, Kado Y, Gao S, Cang J, Fukamachi K, Kuban B, Polakowski A. Optimization of Device Deairing and Airless Connection Techniques for Cleveland Clinic Continuous-Flow Artificial Heart. J Heart Lung Transplant 2020. [DOI: 10.1016/j.healun.2020.01.181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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5
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Shima T, Amamoto R, Kaga C, Kado Y, Sasai T, Watanabe O, Shiinoki J, Iwazaki K, Shigemura H, Tsuji H. Association of life habits and fermented milk intake with stool frequency, defecatory symptoms and intestinal microbiota in healthy Japanese adults. Benef Microbes 2019; 10:841-854. [DOI: 10.3920/bm2019.0057] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Few studies have examined the effects of smoking habit, the frequency of alcohol drinking, exercise, and fermented milk consumption on defecatory symptoms and gut microbiota composition, and particularly their interactive effects. We examined the effect of these lifestyle factors on bowel movements and gut microbiota composition in 366 healthy Japanese adults by analysis of covariance. Smoking did not affect defecatory symptoms but was negatively correlated with total bacteria and Enterococcus counts. Drinking frequency was significantly positively correlated with a feeling of incomplete evacuation and counts of the Bacteroides fragilis group and Acidaminococcus groups. Exercise frequency tended to be negatively correlated with the Bristol Stool Form Scale score and was significantly negatively correlated with the counts of Enterobacteriaceae and positively correlated with the Prevotella counts in the faeces. The frequency of fermented milk consumption was not significant but tended to be positively correlated with stool frequency. The frequency of fermented milk consumption was significantly positively correlated with the counts of the Atopobium cluster, Eubacterium cylindroides group, Acidaminococcus group, Clostridium ramosum subgroup, and Lactobacillus in the faeces. The frequency of consumption of probiotic Lactobacillus casei-containing fermented milk was significantly positively correlated with stool frequency. The counts of probiotic Lactobacillus casei in the stool was positively correlated with the counts of Bifidobacterium and total Lactobacillus. These results suggest that smoking, alcohol drinking, exercise, and consumption of fermented milk, particularly containing probiotic L. casei, differently affect bowel movements and gut microbiota composition in healthy Japanese adults.
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Affiliation(s)
- T. Shima
- Yakult Central Institute, 5-11 Izumi, Kunitachi-shi, Tokyo 186-8650, Japan
| | - R. Amamoto
- Yakult Central Institute, 5-11 Izumi, Kunitachi-shi, Tokyo 186-8650, Japan
| | - C. Kaga
- Yakult Central Institute, 5-11 Izumi, Kunitachi-shi, Tokyo 186-8650, Japan
| | - Y. Kado
- Yakult Central Institute, 5-11 Izumi, Kunitachi-shi, Tokyo 186-8650, Japan
| | - T. Sasai
- Yakult Central Institute, 5-11 Izumi, Kunitachi-shi, Tokyo 186-8650, Japan
| | - O. Watanabe
- Yakult Honsha Co., Ltd., Development Department, 1-1-19 Higashishinbashi, Minato-ku, Tokyo 105-8660, Japan
| | - J. Shiinoki
- Yakult Honsha Co., Ltd., Development Department, 1-1-19 Higashishinbashi, Minato-ku, Tokyo 105-8660, Japan
| | - K. Iwazaki
- Yakult Honsha Co., Ltd., Corporate Planning Office, 1-1-19 Higashishinbashi, Minato-ku, Tokyo 105-8660, Japan
| | - H. Shigemura
- Yakult Honsha Co., Ltd., Corporate Planning Office, 1-1-19 Higashishinbashi, Minato-ku, Tokyo 105-8660, Japan
| | - H. Tsuji
- Yakult Central Institute, 5-11 Izumi, Kunitachi-shi, Tokyo 186-8650, Japan
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6
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Karimov J, Horvath D, Byram N, Polakowski A, Adams J, Kado Y, Miyamoto T, Sale S, Kuban B, Fukamachi K. Mechanical Circulatory Support for Biventricular Heart Failure Using Continuous-Flow Total Artificial Heart. J Heart Lung Transplant 2019. [DOI: 10.1016/j.healun.2019.01.869] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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7
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Karimov J, Polakowski A, Horvath D, Byram N, Kado Y, Miyamoto T, Ahmad M, Najm H, Stewart R, Saarel E, Kuban B, Fukamachi K. Development of Continuous-Flow Total Artificial Heart for Use in Infants. J Heart Lung Transplant 2019. [DOI: 10.1016/j.healun.2019.01.1227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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8
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Yamashita T, Mizohata E, Nagatoishi S, Watanabe T, Nakakido M, Iwanari H, Mochizuki Y, Nakayama T, Kado Y, Yokota Y, Matsumura H, Kawamura T, Kodama T, Hamakubo T, Inoue T, Fujitani H, Tsumoto K. Affinity Improvement of a Cancer-Targeted Antibody through Alanine-Induced Adjustment of Antigen-Antibody Interface. Structure 2018; 27:519-527.e5. [PMID: 30595454 DOI: 10.1016/j.str.2018.11.002] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2017] [Revised: 08/13/2018] [Accepted: 11/01/2018] [Indexed: 12/19/2022]
Abstract
To investigate favorable single amino acid substitutions that improve antigen-antibody interactions, alanine (Ala) mutagenesis scanning of the interfacial residues of a cancer-targeted antibody, B5209B, was performed based on X-ray crystallography analysis. Two substitutions were shown to significantly enhance the binding affinity for the antigen, by up to 30-fold. One substitution improved the affinity by a gain of binding enthalpy, whereas the other substitution improved the affinity by a gain of binding entropy. Molecular dynamics simulations showed that the enthalpic improvement could be attributed to the stabilization of distant salt bridges located at the periphery of the antigen-antibody interface. The entropic improvement was due to the release of water molecules that were stably trapped in the antigen-antibody interface of the wild-type antibody. Importantly, these effects of the Ala substitutions were caused by subtle adjustments of the binding interface. These results will be helpful to design high-affinity antibodies with avoiding entropy-enthalpy compensation.
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Affiliation(s)
- Takefumi Yamashita
- Laboratory for Systems Biology and Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1, Komaba, Meguro-ku, Tokyo 153-8904, Japan
| | - Eiichi Mizohata
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Satoru Nagatoishi
- Department of Bioengineering, School of Engineering, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Takahiro Watanabe
- Department of Medical Genome Sciences, Graduate School of Frontier Sciences, The University of Tokyo, 4-6-1, Shirokanedai, Minato-ku, Tokyo 108-8639, Japan
| | - Makoto Nakakido
- Institute of Medical Science, The University of Tokyo, 4-6-1, Shirokanedai, Minato-ku, Tokyo 108-8639, Japan
| | - Hiroko Iwanari
- Department of Quantitative Biology and Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1, Komaba, Meguro-ku, Tokyo 153-8904, Japan
| | - Yasuhiro Mochizuki
- Department of Quantitative Biology and Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1, Komaba, Meguro-ku, Tokyo 153-8904, Japan
| | - Taisuke Nakayama
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Yuji Kado
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Yuki Yokota
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Hiroyoshi Matsumura
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Takeshi Kawamura
- Laboratory for Systems Biology and Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1, Komaba, Meguro-ku, Tokyo 153-8904, Japan
| | - Tatsuhiko Kodama
- Laboratory for Systems Biology and Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1, Komaba, Meguro-ku, Tokyo 153-8904, Japan
| | - Takao Hamakubo
- Department of Quantitative Biology and Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1, Komaba, Meguro-ku, Tokyo 153-8904, Japan
| | - Tsuyoshi Inoue
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan.
| | - Hideaki Fujitani
- Laboratory for Systems Biology and Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1, Komaba, Meguro-ku, Tokyo 153-8904, Japan.
| | - Kouhei Tsumoto
- Department of Bioengineering, School of Engineering, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan; Department of Medical Genome Sciences, Graduate School of Frontier Sciences, The University of Tokyo, 4-6-1, Shirokanedai, Minato-ku, Tokyo 108-8639, Japan; Institute of Medical Science, The University of Tokyo, 4-6-1, Shirokanedai, Minato-ku, Tokyo 108-8639, Japan.
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9
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Murata D, Okano H, Angkawidjaja C, Akutsu M, Tanaka SI, Kitahara K, Yoshizawa T, Matsumura H, Kado Y, Mizohata E, Inoue T, Sano S, Koga Y, Kanaya S, Takano K. Structural Basis for the Serratia marcescens Lipase Secretion System: Crystal Structures of the Membrane Fusion Protein and Nucleotide-Binding Domain. Biochemistry 2017; 56:6281-6291. [PMID: 29094929 DOI: 10.1021/acs.biochem.7b00985] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Serratia marcescens secretes a lipase, LipA, through a type I secretion system (T1SS). The T1SS for LipA, the Lip system, is composed of an inner membrane ABC transporter with its nucleotide-binding domains (NBD), LipB, a membrane fusion protein, LipC, and an outer membrane channel protein, LipD. Passenger protein secreted by this system has been functionally and structurally characterized well, but relatively little information about the transporter complex is available. Here, we report the crystallographic studies of LipC without the membrane anchor region, LipC-, and the NBD of LipB (LipB-NBD). LipC- crystallographic analysis has led to the determination of the structure of the long α-helical and lipoyl domains, but not the area where it interacts with LipB, suggesting that the region is flexible without LipB. The long α-helical domain has three α-helices, which interacts with LipD in the periplasm. LipB-NBD has the common overall architecture and ATP hydrolysis activity of ABC transporter NBDs. Using the predicted models of full-length LipB and LipD, the overall structural insight into the Lip system is discussed.
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Affiliation(s)
- Daichi Murata
- Department of Biomolecular Chemistry, Kyoto Prefectural University , Hangi-cho, Shimogamo, Sakyo-ku, Kyoto 606-8522, Japan
| | - Hiroyuki Okano
- Graduate School of Engineering, Osaka University , Yamadaoka, Suita 565-0871, Japan
| | - Clement Angkawidjaja
- Graduate School of Engineering, Osaka University , Yamadaoka, Suita 565-0871, Japan
| | - Masato Akutsu
- Buchmann Institute for Molecular Life Sciences, Goethe University Frankfurt , Max-von-Laue-Straße, 60438 Frankfurt am Main, Germany
| | - Shun-Ichi Tanaka
- College of Life Sciences, Ritsumeikan University , Noji-Higashi, Kusatsu 525-8577, Japan
| | - Kenyu Kitahara
- Department of Biomolecular Chemistry, Kyoto Prefectural University , Hangi-cho, Shimogamo, Sakyo-ku, Kyoto 606-8522, Japan
| | - Takuya Yoshizawa
- College of Life Sciences, Ritsumeikan University , Noji-Higashi, Kusatsu 525-8577, Japan
| | - Hiroyoshi Matsumura
- College of Life Sciences, Ritsumeikan University , Noji-Higashi, Kusatsu 525-8577, Japan
| | - Yuji Kado
- Graduate School of Engineering, Osaka University , Yamadaoka, Suita 565-0871, Japan
| | - Eiichi Mizohata
- Graduate School of Engineering, Osaka University , Yamadaoka, Suita 565-0871, Japan
| | - Tsuyoshi Inoue
- Graduate School of Engineering, Osaka University , Yamadaoka, Suita 565-0871, Japan
| | - Satoshi Sano
- Department of Biomolecular Chemistry, Kyoto Prefectural University , Hangi-cho, Shimogamo, Sakyo-ku, Kyoto 606-8522, Japan
| | - Yuichi Koga
- Graduate School of Engineering, Osaka University , Yamadaoka, Suita 565-0871, Japan
| | - Shigenori Kanaya
- Graduate School of Engineering, Osaka University , Yamadaoka, Suita 565-0871, Japan
| | - Kazufumi Takano
- Department of Biomolecular Chemistry, Kyoto Prefectural University , Hangi-cho, Shimogamo, Sakyo-ku, Kyoto 606-8522, Japan
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10
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Inoue M, Ando D, Kamada H, Taki S, Niiyama M, Mukai Y, Tadokoro T, Maenaka K, Nakayama T, Kado Y, Inoue T, Tsutsumi Y, Tsunoda SI. A trimeric structural fusion of an antagonistic tumor necrosis factor-α mutant enhances molecular stability and enables facile modification. J Biol Chem 2017; 292:6438-6451. [PMID: 28235800 DOI: 10.1074/jbc.m117.779686] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Indexed: 11/06/2022] Open
Abstract
Tumor necrosis factor-α (TNF) exerts its biological effect through two types of receptors, p55 TNF receptor (TNFR1) and p75 TNF receptor (TNFR2). An inflammatory response is known to be induced mainly by TNFR1, whereas an anti-inflammatory reaction is thought to be mediated by TNFR2 in some autoimmune diseases. We have been investigating the use of an antagonistic TNF mutant (TNFR1-selective antagonistic TNF mutant (R1antTNF)) to reveal the pharmacological effect of TNFR1-selective inhibition as a new therapeutic modality. Here, we aimed to further improve and optimize the activity and behavior of this mutant protein both in vitro and in vivo Specifically, we examined a trimeric structural fusion of R1antTNF, formed via the introduction of short peptide linkers, as a strategy to enhance bioactivity and molecular stability. By comparative analysis with R1antTNF, the trimeric fusion, referred to as single-chain R1antTNF (scR1antTNF), was found to retain in vitro molecular properties of receptor selectivity and antagonistic activity but displayed a marked increase in thermal stability. The residence time of scR1antTNF in vivo was also significantly prolonged. Furthermore, molecular modification using polyethylene glycol (PEG) was easily controlled by limiting the number of reactive sites. Taken together, our findings show that scR1antTNF displays enhanced molecular stability while maintaining biological activity compared with R1antTNF.
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Affiliation(s)
- Masaki Inoue
- From the Laboratory of Biopharmaceutical Research and.,Center for Drug Design Research, National Institutes of Biomedical Innovation, Health and Nutrition, 7-6-8 Saito-Asagi, Ibaraki, Osaka 567-0085, Japan.,Laboratory of Cellular and Molecular Physiology, Faculty of Pharmaceutical Sciences, Kobe Gakuin University, 1-1-3 Minatojima, Chuo-ku, Kobe, 650-8586, Japan
| | - Daisuke Ando
- From the Laboratory of Biopharmaceutical Research and.,Laboratories of Biomedical Innovation and
| | - Haruhiko Kamada
- From the Laboratory of Biopharmaceutical Research and .,Center for Drug Design Research, National Institutes of Biomedical Innovation, Health and Nutrition, 7-6-8 Saito-Asagi, Ibaraki, Osaka 567-0085, Japan.,Global Center for Medical Engineering and Informatics, Osaka University, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Shintaro Taki
- From the Laboratory of Biopharmaceutical Research and.,Laboratories of Biomedical Innovation and
| | | | - Yohei Mukai
- From the Laboratory of Biopharmaceutical Research and.,Center for Drug Design Research, National Institutes of Biomedical Innovation, Health and Nutrition, 7-6-8 Saito-Asagi, Ibaraki, Osaka 567-0085, Japan
| | - Takashi Tadokoro
- Center for Research and Education on Drug Discovery, Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan, and
| | - Katsumi Maenaka
- Center for Research and Education on Drug Discovery, Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan, and
| | - Taisuke Nakayama
- From the Laboratory of Biopharmaceutical Research and.,Division of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Yuji Kado
- From the Laboratory of Biopharmaceutical Research and.,Division of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Tsuyoshi Inoue
- From the Laboratory of Biopharmaceutical Research and.,Division of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Yasuo Tsutsumi
- Center for Drug Design Research, National Institutes of Biomedical Innovation, Health and Nutrition, 7-6-8 Saito-Asagi, Ibaraki, Osaka 567-0085, Japan.,Global Center for Medical Engineering and Informatics, Osaka University, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan.,Toxicology and Safety Science, Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Shin-Ichi Tsunoda
- From the Laboratory of Biopharmaceutical Research and .,Center for Drug Design Research, National Institutes of Biomedical Innovation, Health and Nutrition, 7-6-8 Saito-Asagi, Ibaraki, Osaka 567-0085, Japan.,Laboratory of Cellular and Molecular Physiology, Faculty of Pharmaceutical Sciences, Kobe Gakuin University, 1-1-3 Minatojima, Chuo-ku, Kobe, 650-8586, Japan.,Laboratories of Biomedical Innovation and.,Global Center for Medical Engineering and Informatics, Osaka University, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan
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11
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Kado Y, Mizohata E, Nagatoishi S, Iijima M, Shinoda K, Miyafusa T, Nakayama T, Yoshizumi T, Sugiyama A, Kawamura T, Lee YH, Matsumura H, Doi H, Fujitani H, Kodama T, Shibasaki Y, Tsumoto K, Inoue T. Epiregulin Recognition Mechanisms by Anti-epiregulin Antibody 9E5: STRUCTURAL, FUNCTIONAL, AND MOLECULAR DYNAMICS SIMULATION ANALYSES. J Biol Chem 2015; 291:2319-30. [PMID: 26627827 DOI: 10.1074/jbc.m115.656009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Indexed: 11/06/2022] Open
Abstract
Epiregulin (EPR) is a ligand of the epidermal growth factor (EGF) family that upon binding to its epidermal growth factor receptor (EGFR) stimulates proliferative signaling, especially in colon cancer cells. Here, we describe the three-dimensional structure of the EPR antibody (the 9E5(Fab) fragment) in the presence and absence of EPR. Among the six complementarity-determining regions (CDRs), CDR1-3 in the light chain and CDR2 in the heavy chain predominantly recognize EPR. In particular, CDR3 in the heavy chain dramatically moves with cis-trans isomerization of Pro(103). A molecular dynamics simulation and mutational analyses revealed that Arg(40) in EPR is a key residue for the specific binding of 9E5 IgG. From isothermal titration calorimetry analysis, the dissociation constant was determined to be 6.5 nm. Surface plasmon resonance analysis revealed that the dissociation rate of 9E5 IgG is extremely slow. The superimposed structure of 9E5(Fab)·EPR on the known complex structure of EGF·EGFR showed that the 9E5(Fab) paratope overlaps with Domains I and III on the EGFR, which reveals that the 9E5(Fab)·EPR complex could not bind to the EGFR. The 9E5 antibody will also be useful in medicine as a neutralizing antibody specific for colon cancer.
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Affiliation(s)
- Yuji Kado
- From the Division of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamada-Oka, Suita, Osaka 565-0871, Japan, Interdisciplinary Program for Biomedical Sciences, Institute for Academic Initiatives, Osaka University, 1-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Eiichi Mizohata
- From the Division of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamada-Oka, Suita, Osaka 565-0871, Japan
| | - Satoru Nagatoishi
- Medical Proteomics Laboratory, The Institute of Medical Science, The University of Tokyo, 4-6-1 Shirokanedai, Minato-ku Tokyo 108-8639, Japan, and
| | - Mariko Iijima
- Laboratory for Systems Biology and Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Number 34 Komaba, Meguro-ku, Tokyo 153-8904, Japan
| | - Keiko Shinoda
- Laboratory for Systems Biology and Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Number 34 Komaba, Meguro-ku, Tokyo 153-8904, Japan
| | - Takamitsu Miyafusa
- Medical Proteomics Laboratory, The Institute of Medical Science, The University of Tokyo, 4-6-1 Shirokanedai, Minato-ku Tokyo 108-8639, Japan, and
| | - Taisuke Nakayama
- From the Division of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamada-Oka, Suita, Osaka 565-0871, Japan
| | - Takuma Yoshizumi
- From the Division of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamada-Oka, Suita, Osaka 565-0871, Japan
| | - Akira Sugiyama
- Laboratory for Systems Biology and Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Number 34 Komaba, Meguro-ku, Tokyo 153-8904, Japan
| | - Takeshi Kawamura
- Laboratory for Systems Biology and Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Number 34 Komaba, Meguro-ku, Tokyo 153-8904, Japan
| | - Young-Hun Lee
- Laboratory for Systems Biology and Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Number 34 Komaba, Meguro-ku, Tokyo 153-8904, Japan
| | - Hiroyoshi Matsumura
- From the Division of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamada-Oka, Suita, Osaka 565-0871, Japan
| | - Hirofumi Doi
- Laboratory for Systems Biology and Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Number 34 Komaba, Meguro-ku, Tokyo 153-8904, Japan
| | - Hideaki Fujitani
- Laboratory for Systems Biology and Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Number 34 Komaba, Meguro-ku, Tokyo 153-8904, Japan
| | - Tatsuhiko Kodama
- Laboratory for Systems Biology and Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Number 34 Komaba, Meguro-ku, Tokyo 153-8904, Japan
| | - Yoshikazu Shibasaki
- Laboratory for Systems Biology and Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Number 34 Komaba, Meguro-ku, Tokyo 153-8904, Japan
| | - Kouhei Tsumoto
- Medical Proteomics Laboratory, The Institute of Medical Science, The University of Tokyo, 4-6-1 Shirokanedai, Minato-ku Tokyo 108-8639, Japan, and
| | - Tsuyoshi Inoue
- From the Division of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamada-Oka, Suita, Osaka 565-0871, Japan,
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Nakayama T, Mizohata E, Yamashita T, Nagatoishi S, Nakakido M, Iwanari H, Mochizuki Y, Kado Y, Yokota Y, Satoh R, Tsumoto K, Fujitani H, Kodama T, Hamakubo T, Inoue T. Structural features of interfacial tyrosine residue in ROBO1 fibronectin domain-antibody complex: Crystallographic, thermodynamic, and molecular dynamic analyses. Protein Sci 2015; 24:328-40. [PMID: 25492858 PMCID: PMC4353359 DOI: 10.1002/pro.2619] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2014] [Revised: 12/02/2014] [Accepted: 12/04/2014] [Indexed: 11/09/2022]
Abstract
ROBO1, fibronectin Type-III domain (Fn)-containing protein, is a novel immunotherapeutic target for hepatocellular carcinoma in humans. The crystal structure of the antigen-binding fragment (Fab) of B2212A, the monoclonal antibody against the third Fn domain (Fn3) of ROBO1, was determined in pursuit of antibody drug for hepatocellular carcinoma. This effort was conducted in the presence or absence of the antigen, with the chemical features being investigated by determining the affinity of the antibody using molecular dynamics (MD) and thermodynamics. The structural comparison of B2212A Fab between the complex and the free form revealed that the interfacial Tyr(L) 50 (superscripts L, H, and F stand for the residues in the light chain, heavy chain, and Fn3, respectively) played important roles in Fn3 recognition. That is, the aromatic ring of Tyr(L) 50 pivoted toward Phe(F) 68, forming a CH/π interaction and a new hydrogen bond with the carbonyl O atom of Phe(F) 68. MD simulations predicted that the Tyr(L) 50-Phe(F) 68 interaction almost entirely dominated Fab-Fn3 binding, and Ala-substitution of Tyr(L) 50 led to a reduced binding of the resultant complex. On the contrary, isothermal titration calorimetry experiments underscored that Ala-substitution of Tyr(L) 50 caused an increase of the binding enthalpy between B2212A and Fn3, but importantly, it induced an increase of the binding entropy, resulting in a suppression of loss in the Gibbs free energy in total. These results suggest that mutation analysis considering the binding entropy as well as the binding enthalpy will aid in the development of novel antibody drugs for hepatocellular carcinoma.
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Affiliation(s)
- Taisuke Nakayama
- Structural Physical Chemistry, Division of Applied Chemistry, Graduate School of Engineering, Osaka UniversityOsaka, Japan
| | - Eiichi Mizohata
- Structural Physical Chemistry, Division of Applied Chemistry, Graduate School of Engineering, Osaka UniversityOsaka, Japan
| | - Takefumi Yamashita
- Laboratory for Systems Biology and Medicine, Research Center for Advanced Science and Technology, The University of TokyoTokyo, Japan
| | - Satoru Nagatoishi
- Medical Proteomics Laboratory, The Institute of Medical Science, The University of TokyoTokyo, Japan
| | - Makoto Nakakido
- Medical Proteomics Laboratory, The Institute of Medical Science, The University of TokyoTokyo, Japan
| | - Hiroko Iwanari
- Department of Quantitative Biology and Medicine, Research Center for Advanced Science and Technology, The University of TokyoTokyo, Japan
| | - Yasuhiro Mochizuki
- Department of Quantitative Biology and Medicine, Research Center for Advanced Science and Technology, The University of TokyoTokyo, Japan
| | - Yuji Kado
- Structural Physical Chemistry, Division of Applied Chemistry, Graduate School of Engineering, Osaka UniversityOsaka, Japan
| | - Yuki Yokota
- Structural Physical Chemistry, Division of Applied Chemistry, Graduate School of Engineering, Osaka UniversityOsaka, Japan
| | - Reiko Satoh
- Structural Physical Chemistry, Division of Applied Chemistry, Graduate School of Engineering, Osaka UniversityOsaka, Japan
| | - Kouhei Tsumoto
- Medical Proteomics Laboratory, The Institute of Medical Science, The University of TokyoTokyo, Japan
| | - Hideaki Fujitani
- Laboratory for Systems Biology and Medicine, Research Center for Advanced Science and Technology, The University of TokyoTokyo, Japan
| | - Tatsuhiko Kodama
- Laboratory for Systems Biology and Medicine, Research Center for Advanced Science and Technology, The University of TokyoTokyo, Japan
| | - Takao Hamakubo
- Department of Quantitative Biology and Medicine, Research Center for Advanced Science and Technology, The University of TokyoTokyo, Japan
| | - Tsuyoshi Inoue
- Structural Physical Chemistry, Division of Applied Chemistry, Graduate School of Engineering, Osaka UniversityOsaka, Japan
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Shahgaldi K, Hegner T, Da Silva C, Fukuyama A, Takeuchi M, Uema A, Kado Y, Nagata Y, Hayashi A, Otani K, Fukuda S, Yoshitani H, Otsuji Y, Morhy S, Lianza A, Afonso T, Oliveira W, Tavares G, Rodrigues A, Vieira M, Warth A, Deutsch A, Fischer C, Tezynska-Oniszk I, Turska-Kmiec A, Kawalec W, Dangel J, Maruszewski B, Bokiniec R, Burczynski P, Borszewska-Kornacka K, Ziolkowska L, Zuk M, Troshina A, Dzhalilova D, Poteshkina N, Hamitov F, Warita S, Kawasaki M, Tanaka R, Yagasaki H, Minatoguchi S, Wanatabe T, Ono K, Noda T, Wanatabe S, Minatoguchi S, Angelis A, Ageli K, Vlachopoulos C, Felekos I, Ioakimidis N, Aznaouridis K, Vaina S, Abdelrasoul M, Tsiamis E, Stefanadis C, Cameli M, Sparla S, D'ascenzi F, Fineschi M, Favilli R, Pierli C, Henein M, Mondillo S, Lindqvist P, Tossavainen E, Gonzalez M, Soderberg S, Henein M, Holmgren A, Strachinaru M, Catez E, Jousten I, Pavel O, Janssen C, Morissens M, Chatzistamatiou E, Moustakas G, Memo G, Konstantinidis D, Mpampatzeva Vagena I, Manakos K, Traxanas K, Vergi N, Feretou A, Kallikazaros I, Tsai WC, Sun YT, Lee WH, Yang LT, Liu YW, Lee CH, Li WT, Mizariene V, Bieseviciene M, Karaliute R, Verseckaite R, Vaskelyte J, Lesauskaite V, Chatzistamatiou E, Mpampatseva Vagena I, Manakos K, Moustakas G, Konstantinidis D, Memo G, Mitsakis O, Kasakogias A, Syros P, Kallikazaros I, Hristova K, Cornelissen G, Singh R, Shiue I, Coisne D, Madjalian AM, Tchepkou C, Raud Raynier P, Degand B, Christiaens L, Baldenhofer G, Spethmann S, Dreger H, Sanad W, Baumann G, Stangl K, Stangl V, Knebel F, Azzaz S, Kacem S, Ouali S, Risos L, Dedobbeleer C, Unger P, Sinem Cakal S, Elif Eroglu E, Baydar O, Beytullah Cakal B, Mehmet Vefik Yazicioglu M, Mustafa Bulut M, Cihan Dundar C, Kursat Tigen K, Birol Ozkan B, Ali Metin Esen A, Tournoux F, Chequer R, Sroussi M, Hyafil F, Rouzet F, Leguludec D, Baum P, Stoebe S, Pfeiffer D, Hagendorff A, Fang F, Lau M, Zhang Q, Luo X, Wang X, Chen L, Yu C, Zaborska B, Smarz K, Makowska E, Kulakowski P, Budaj A, Bengrid TM, Zhao Y, Henein MY, Caminiti G, D'antoni V, Cardaci V, Conti V, Volterrani M, Warita S, Kawasaki M, Yagasaki H, Minatoguchi S, Nagaya M, Ono K, Noda T, Watanabe S, Houle H, Minatoguchi S, Gillebert TC, Chirinos JA, Claessens TC, Raja MW, De Buyzere ML, Segers P, Rietzschel ER, Kim K, Cha J, Chung H, Kim J, Yoon Y, Lee B, Hong B, Rim S, Kwon H, Choi E, Pyankov V, Aljaroudi W, Matta S, Al-Shaar L, Habib R, Gharzuddin W, Arnaout S, Skouri H, Jaber W, Abchee A, Bouzas Mosquera A, Peteiro J, Broullon F, Constanso Conde I, Bescos Galego H, Martinez Ruiz D, Yanez Wonenburger J, Vazquez Rodriguez J, Alvarez Garcia N, Castro Beiras A, Gunyeli E, Oliveira Da Silva C, Shahgaldi K, Manouras A, Winter R, Meimoun P, Abouth S, Martis S, Boulanger J, Elmkies F, Zemir H, Detienne J, Luycx-Bore A, Clerc J, Rodriguez Palomares JF, Gutierrez L, Maldonado G, Garcia G, Galuppo V, Gruosso D, Teixido G, Gonzalez Alujas M, Evangelista A, Garcia Dorado D, Rechcinski T, Wierzbowska-Drabik K, Wejner-Mik P, Szymanska B, Jerczynska H, Lipiec P, Kasprzak J, El-Touny K, El-Fawal S, Loutfi M, El-Sharkawy E, Ashour S, Boniotti C, Carminati M, Fusini L, Andreini D, Pontone G, Pepi M, Caiani E, Oryshchyn N, Kramer B, Hermann S, Liu D, Hu K, Ertl G, Weidemann F, Ancona F, Miyazaki S, Slavich M, Figini F, Latib A, Chieffo A, Montorfano M, Alfieri O, Colombo A, Agricola E, Nogueira M, Branco L, Rosa S, Portugal G, Galrinho A, Abreu J, Cacela D, Patricio L, Fragata J, Cruz Ferreira R, Igual Munoz B, Erdociain Perales M, Maceira Gonzalez A, Estornell Erill Jordi J, Donate Bertolin L, Vazquez Sanchez Alejandro A, Miro Palau Vicente V, Cervera Zamora A, Piquer Gil M, Montero Argudo A, Girgis HYA, Illatopa V, Cordova F, Espinoza D, Ortega J, Khan U, Islam A, Majumder A, Girgis HYA, Bayat F, Naghshbandi E, Naghshbandi E, Samiei N, Samiei N, Malev E, Omelchenko M, Vasina L, Zemtsovsky E, Piatkowski R, Kochanowski J, Budnik M, Scislo P, Opolski G, Kochanowski J, Piatkowski R, Scislo P, Budnik M, Marchel M, Opolski G, Abid L, Ben Kahla S, Abid D, Charfeddine S, Maaloul I, Ben Jmaa M, Kammoun S, Hashimoto G, Suzuki M, Yoshikawa H, Otsuka T, Isekame Y, Yamashita H, Kawase I, Ozaki S, Nakamura M, Sugi K, Benvenuto E, Leggio S, Buccheri S, Bonura S, Deste W, Tamburino C, Monte IP, Gripari P, Fusini L, Muratori M, Tamborini G, Ghulam Ali S, Bottari V, Cefalu' C, Bartorelli A, Agrifoglio M, Pepi M, Zambon E, Iorio A, Di Nora C, Abate E, Lo Giudice F, Di Lenarda A, Agostoni P, Sinagra G, Timoteo AT, Galrinho A, Moura Branco L, Rio P, Aguiar Rosa S, Oliveira M, Silva Cunha P, Leal A, Cruz Ferreira R, Zemanek D, Tomasov P, Belehrad M, Kostalova J, Kara T, Veselka J, Hassanein M, El Tahan S, El Sharkawy E, Shehata H, Yoon Y, Choi H, Seo H, Lee S, Kim H, Youn T, Kim Y, Sohn D, Choi G, Mielczarek M, Huttin O, Voilliot D, Sellal J, Manenti V, Carillo S, Olivier A, Venner C, Juilliere Y, Selton-Suty C, Butz T, Faber L, Brand M, Piper C, Wiemer M, Noelke J, Sasko B, Langer C, Horstkotte D, Trappe H, Maysou L, Tessonnier L, Jacquier A, Serratrice J, Copel C, Stoppa A, Seguier J, Saby L, Verschueren A, Habib G, Petroni R, Bencivenga S, Di Mauro M, Acitelli A, Cicconetti M, Romano S, Petroni A, Penco M, Maceira Gonzalez AM, Cosin-Sales J, Igual B, Sancho-Tello R, Ruvira J, Mayans J, Choi J, Kim S, Almeida A, Azevedo O, Amado J, Picarra B, Lima R, Cruz I, Pereira V, Marques N, Chatzistamatiou E, Konstantinidis D, Manakos K, Mpampatseva Vagena I, Moustakas G, Memo G, Mitsakis O, Kasakogias A, Syros P, Kallikazaros I, Cho E, Kim J, Hwang B, Kim D, Jang S, Jeon H, Cho J, Chatzistamatiou E, Konstantinidis D, Memo G, Mpapatzeva Vagena I, Moustakas G, Manakos K, Traxanas K, Vergi N, Feretou A, Kallikazaros I, Jedrzejewska I, Konopka M, Krol W, Swiatowiec A, Dluzniewski M, Braksator W, Sefri Noventi S, Sugiri S, Uddin I, Herminingsih S, Arif Nugroho M, Boedijitno S, Caro Codon J, Blazquez Bermejo Z, Valbuena Lopez SC, Lopez Fernandez T, Rodriguez Fraga O, Torrente Regidor M, Pena Conde L, Moreno Yanguela M, Buno Soto A, Lopez-Sendon JL, Stevanovic A, Dekleva M, Kim M, Kim S, Kim Y, Shim J, Park S, Park S, Kim Y, Shim W, Kozakova M, Muscelli E, Morizzo C, Casolaro A, Paterni M, Palombo C, Bayat F, Nazmdeh M, Naghshbandi E, Nateghi S, Tomaszewski A, Kutarski A, Brzozowski W, Tomaszewski M, Nakano E, Harada T, Takagi Y, Yamada M, Takano M, Furukawa T, Akashi Y, Lindqvist G, Henein M, Backman C, Gustafsson S, Morner S, Marinov R, Hristova K, Geirgiev S, Pechilkov D, Kaneva A, Katova T, Pilosoff V, Pena Pena M, Mesa Rubio D, Ruiz Ortin M, Delgado Ortega M, Romo Penas E, Pardo Gonzalez L, Rodriguez Diego S, Hidalgo Lesmes F, Pan Alvarez-Ossorio M, Suarez De Lezo Cruz-Conde J, Gospodinova M, Sarafov S, Guergelcheva V, Vladimirova L, Tournev I, Denchev S, Mozenska O, Segiet A, Rabczenko D, Kosior D, Gao S, Eliasson M, Polte C, Lagerstrand K, Bech-Hanssen O, Morosin M, Piazza R, Leonelli V, Leiballi E, Pecoraro R, Cinello M, Dell' Angela L, Cassin M, Sinagra G, Nicolosi G, Savu O, Carstea N, Stoica E, Macarie C, Moldovan H, Iliescu V, Chioncel O, Moral S, Gruosso D, Galuppo V, Teixido G, Rodriguez-Palomares J, Gutierrez L, Evangelista A, Jansen Klomp WW, Peelen L, Spanjersberg A, Brandon Bravo Bruinsma G, Van 'T Hof A, Laveau F, Hammoudi N, Helft G, Barthelemy O, Michel P, Petroni T, Djebbar M, Boubrit L, Le Feuvre C, Isnard R, Bandera F, Generati G, Pellegrino M, Alfonzetti E, Labate V, Villani S, Gaeta M, Guazzi M, Gabriels C, Lancellotti P, Van De Bruaene A, Voilliot D, De Meester P, Buys R, Delcroix M, Budts W, Cruz I, Stuart B, Caldeira D, Morgado G, Almeida A, Lopes L, Fazendas P, Joao I, Cotrim C, Pereira H, Weissler Snir A, Greenberg G, Shapira Y, Weisenberg D, Monakier D, Nevzorov R, Sagie A, Vaturi M, Bando M, Yamada H, Saijo Y, Takagawa Y, Sawada N, Hotchi J, Hayashi S, Hirata Y, Nishio S, Sata M, Jackson T, Sammut E, Siarkos M, Lee L, Carr-White G, Rajani R, Kapetanakis S, Ciobotaru V, Yagasaki H, Kawasaki M, Tanaka R, Minatoguchi S, Sato N, Amano K, Warita S, Ono K, Noda T, Minatoguchi S, Breithardt OA, Razavi H, Nabutovsky Y, Ryu K, Gaspar T, Kosiuk J, John S, Prinzen F, Hindricks G, Piorkowski C, Nemchyna O, Tovstukha V, Chikovani A, Golikova I, Lutai M, Nemes A, Kalapos A, Domsik P, Lengyel C, Orosz A, Forster T, Nordenfur T, Babic A, Giesecke A, Bulatovic I, Ripsweden J, Samset E, Winter R, Larsson M, Blazquez Bermejo Z, Lopez Fernandez T, Caro Codon J, Valbuena S, Caro Codon J, Mori Junco R, Moreno Yanguela M, Lopez-Sendon J, Pinto-Teixeira P, Branco L, Galrinho A, Oliveira M, Cunha P, Silva T, Rio P, Feliciano J, Nogueira-Silva M, Ferreira R, Shkolnik E, Vasyuk Y, Nesvetov V, Shkolnik L, Varlan G, Bajraktari G, Ronn F, Ibrahimi P, Jashari F, Jensen S, Henein M, Kang MK, Mun HS, Choi S, Cho JR, Han S, Lee N, Cho IJ, Heo R, Chang H, Shin S, Shim C, Hong G, Chung N. Poster session 3: Thursday 4 December 2014, 14:00-18:00 * Location: Poster area. Eur Heart J Cardiovasc Imaging 2014. [DOI: 10.1093/ehjci/jeu253] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Mine S, Kado Y, Watanabe M, Fukuda Y, Abe Y, Ueda T, Kawarabayasi Y, Inoue T, Ishikawa K. The structure of hyperthermophilic β-N-acetylglucosaminidase reveals a novel dimer architecture associated with the active site. FEBS J 2014; 281:5092-103. [DOI: 10.1111/febs.13049] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2014] [Revised: 09/02/2014] [Accepted: 09/11/2014] [Indexed: 12/01/2022]
Affiliation(s)
- Shouhei Mine
- National Institute of Advanced Industrial Science and Technology (AIST); Hyogo Japan
| | - Yuji Kado
- Interdisciplinary Program for Biomedical Sciences; Institute for Academic Initiatives; Osaka University; Japan
- Graduate School of Engineering; Osaka University; Japan
| | | | - Yohta Fukuda
- Graduate School of Engineering; Osaka University; Japan
| | - Yoshito Abe
- Graduate School of Pharmaceutical Sciences; Kyushu University; Fukuoka Japan
| | - Tadashi Ueda
- Graduate School of Pharmaceutical Sciences; Kyushu University; Fukuoka Japan
| | - Yutaka Kawarabayasi
- National Institute of Advanced Industrial Science and Technology (AIST); Hyogo Japan
- Faculty of Agriculture; Kyushu University; Fukuoka Japan
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Lee YH, Iijima M, Kado Y, Mizohata E, Inoue T, Sugiyama A, Doi H, Shibasaki Y, Kodama T. Construction and characterization of functional anti-epiregulin humanized monoclonal antibodies. Biochem Biophys Res Commun 2013; 441:1011-7. [PMID: 24239549 DOI: 10.1016/j.bbrc.2013.11.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2013] [Accepted: 11/03/2013] [Indexed: 01/21/2023]
Abstract
Growth factors are implicated in several processes essential for cancer progression. Specifically, epidermal growth factor (EGF) family members, including epiregulin (EREG), are important prognostic factors in many epithelial cancers, and treatments targeting these molecules have recently become available. Here, we constructed and expressed humanized anti-EREG antibodies by variable domain resurfacing based on the three-dimensional (3D) structure of the Fv fragment. However, the initial humanized antibody (HM0) had significantly decreased antigen-binding affinity. Molecular modeling results suggested that framework region (FR) residues latently important to antigen binding included residue 49 of the light chain variable region (VL). Back mutation of the VL49 residue (tyrosine to histidine) generated the humanized version HM1, which completely restored the binding affinity of its murine counterpart. Importantly, only one mutation in the framework may be necessary to recover the binding capability of a humanized antibody. Our data support that HM1 exerts potent antibody-dependent cellular cytotoxicity (ADCC). Hence, this antibody may have potential for further development as a candidate therapeutic agent and research tool.
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Affiliation(s)
- Young-Hun Lee
- Laboratory for Systems Biology and Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8904, Japan; Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan
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Kado Y, Aritake K, Uodome N, Okano Y, Okazaki N, Matsumura H, Urade Y, Inoue T. Human hematopoietic prostaglandin D synthase inhibitor complex structures. J Biochem 2012; 151:447-55. [DOI: 10.1093/jb/mvs024] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
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Kado Y, Inoue T, Ishikawa K. Structure of hyperthermophilic β-glucosidase from Pyrococcus furiosus. Acta Crystallogr Sect F Struct Biol Cryst Commun 2011; 67:1473-9. [PMID: 22139147 PMCID: PMC3232120 DOI: 10.1107/s1744309111035238] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2011] [Accepted: 08/29/2011] [Indexed: 04/20/2023]
Abstract
Recombinant hyperthermophilic β-glucosidase from P. furiosus was crystallized. The crystal structure was solved to a resolution of 2.35 Å. Three categories of cellulases, endoglucanases, cellobiohydrolases and β-glucosidases, are commonly used in the process of cellulose saccharification. In particular, the activity and characteristics of hyperthermophilic β-glucosidase make it promising in industrial applications of biomass. In this paper, the crystal structure of the hyperthermophilic β-glucosidase from Pyrococcus furiosus (BGLPf) was determined at 2.35 Å resolution in a new crystal form. The structure showed that there is one tetramer in the asymmetric unit and that the dimeric molecule exhibits a structure that is stable towards sodium dodecyl sulfate (SDS). The dimeric molecule migrated in reducing SDS polyacrylamide gel electrophoresis (SDS–PAGE) buffer even after boiling at 368 K. Energy calculations demonstrated that one of the two dimer interfaces acquired the largest solvation free energy. Structural comparison and sequence alignment with mesophilic β-glucosidase A from Clostridium cellulovorans (BGLACc) revealed that the elongation at the C-terminal end forms a hydrophobic patch at the dimer interface that might contribute to hyperthermostability.
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Affiliation(s)
- Yuji Kado
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Ikeda, Osaka, Japan
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Tsuji H, Nishimura S, Inui T, Kado Y, Ishikawa K, Nakamura T, Uegaki K. Kinetic and crystallographic analyses of the catalytic domain of chitinase from Pyrococcus furiosus- the role of conserved residues in the active site. FEBS J 2010; 277:2683-95. [PMID: 20553502 DOI: 10.1111/j.1742-464x.2010.07685.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The hyperthermostable chitinase from the hyperthermophilic archaeon Pyrococcus furiosus has a unique multidomain structure containing two chitin-binding domains and two catalytic domains, and exhibits strong crystalline chitin hydrolyzing activity at high temperature. In order to investigate the structure-function relationship of this chitinase, we analyzed one of the catalytic domains (AD2) using mutational and kinetic approaches, and determined the crystal structure of AD2 complexed with chito-oligosaccharide substrate. Kinetic studies showed that, among the acidic residues in the signature sequence of family 18 chitinases (DXDXE motif), the second Asp (D(2)) and Glu (E) residues play critical roles in the catalysis of archaeal chitinase. Crystallographic analyses showed that the side-chain of the catalytic proton-donating E residue is restrained into the favorable conformer for proton donation by a hydrogen bond interaction with the adjacent D(2) residue. The comparison of active site conformations of family 18 chitinases provides a new criterion for the subclassification of family 18 chitinase based on the conformational change of the D(2) residue.
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Affiliation(s)
- Hiroaki Tsuji
- Laboratory of Protein Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Japan
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19
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Tsuji H, Nishimura S, Inui T, Kado Y, Ishikawa K, Nakamura T, Uegaki K. Kinetic and crystallographic analyses of the catalytic domain of chitinase from Pyrococcus furiosus- the role of conserved residues in the active site. FEBS J 2010. [DOI: 10.1111/j.1742-4658.2010.07685.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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20
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Nakamura T, Kado Y, Yamaguchi T, Matsumura H, Ishikawa K, Inoue T. Crystal structure of peroxiredoxin from Aeropyrum pernix K1 complexed with its substrate, hydrogen peroxide. J Biochem 2009; 147:109-15. [PMID: 19819903 DOI: 10.1093/jb/mvp154] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Peroxiredoxin (Prx) reduces hydrogen peroxide and alkyl peroxides to water and corresponding alcohols, respectively. The reaction is dependent on a peroxidatic cysteine, whose sulphur atom nucleophilically attacks one of the oxygen atoms of the peroxide substrate. In spite of the many structural studies that have been carried out on this reaction, the tertiary structure of the hydrogen peroxide-bound form of Prx has not been elucidated. In this paper, we report the crystal structure of Prx from Aeropyrum pernix K1 in the peroxide-bound form. The conformation of the polypeptide chain is the same as that in the reduced apo-form. The hydrogen peroxide molecule is in close contact with the peroxidatic Cys50 and the neighbouring Thr47 and Arg126 side chain atoms, as well as with the main chain nitrogen atoms of Val49 and Cys50. Bound peroxide was also observed in the mutant C50S, in which the peroxidatic cysteine was replaced by serine. Therefore, the sulphur atom of the peroxidatic cysteine is not essential for peroxide binding, although it enhances the binding affinity. Hydrogen peroxide binds to the protein so that it fills the active site pocket. This study provides insight into the early stage of the Prx reaction.
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Affiliation(s)
- Tsutomu Nakamura
- National Institute of Advanced Industrial Science and Technology, Ikeda, Osaka, Japan.
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21
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Yuan C, Sidhu RS, Kuklev DV, Kado Y, Wada M, Song I, Smith WL. Cyclooxygenase Allosterism, Fatty Acid-mediated Cross-talk between Monomers of Cyclooxygenase Homodimers. J Biol Chem 2009; 284:10046-55. [PMID: 19218248 DOI: 10.1074/jbc.m808634200] [Citation(s) in RCA: 101] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Prostaglandin endoperoxide H synthases (PGHSs) 1 and 2, also known as cyclooxygenases (COXs), catalyze the oxygenation of arachidonic acid (AA) in the committed step in prostaglandin (PG) biosynthesis. PGHSs are homodimers that display half of sites COX activity with AA; thus, PGHSs function as conformational heterodimers. Here we show that, during catalysis, fatty acids (FAs) are bound at both COX sites of a PGHS-2 dimer. Initially, an FA binds with high affinity to one COX site of an unoccupied homodimer. This monomer becomes an allosteric monomer, and it causes the partner monomer to become the catalytic monomer that oxygenates AA. A variety of FAs can bind with high affinity to the COX site of the monomer that becomes the allosteric monomer. Importantly, the efficiency of AA oxygenation is determined by the nature of the FA bound to the allosteric monomer. When tested with low concentrations of saturated and monounsaturated FAs (e.g. oleic acid), the rates of AA oxygenation are typically 1.5-2 times higher with PGHS-2 than with PGHS-1. These different kinetic behaviors of PGHSs may account for the ability of PGHS-2 but not PGHS-1 to efficiently oxygenate AA in intact cells when AA is a small fraction of the FA pool such as during "late phase" PG synthesis.
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Affiliation(s)
- Chong Yuan
- Department of Biological Chemistry, University of Michigan, Ann Arbor, Michigan 48109, USA
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22
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Kikuchi H, Kado Y, Matsumura H, Fukunishi Y, Kinoshita T, Okuno Y, Nakanishi I, Minakata S, Sakata T, Aritake K, Urade Y, Inoue T. Design of anti-allergic inhibitors for human hematopoietic prostaglandin D synthase. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308089009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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23
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Aritake K, Kado Y, Inoue T, Miyano M, Urade Y. Structural and Functional Characterization of HQL-79, an Orally Selective Inhibitor of Human Hematopoietic Prostaglandin D Synthase. J Biol Chem 2006; 281:15277-86. [PMID: 16547010 DOI: 10.1074/jbc.m506431200] [Citation(s) in RCA: 82] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
We determined the crystal structure of human hematopoietic prostaglandin (PG) D synthase (H-PGDS) as the quaternary complex with glutathione (GSH), Mg2+, and an inhibitor, HQL-79, having anti-inflammatory activities in vivo, at a 1.45-A resolution. In the quaternary complex, HQL-79 was found to reside within the catalytic cleft between Trp104 and GSH. HQL-79 was stabilized by interaction of a phenyl ring of its diphenyl group with Trp104 and by its piperidine group with GSH and Arg14 through water molecules, which form a network with hydrogen bonding and salt bridges linked to Mg2+. HQL-79 inhibited human H-PGDS competitively against the substrate PGH2 and non-competitively against GSH with Ki of 5 and 3 microm, respectively. Surface plasmon resonance analysis revealed that HQL-79 bound to H-PGDS with an affinity that was 12-fold higher in the presence of GSH and Mg2+ (Kd, 0.8 microm) than in their absence. Mutational studies revealed that Arg14 was important for the Mg2+-mediated increase in the binding affinity of H-PGDS for HQL-79, and that Trp104, Lys112, and Lys198 were important for maintaining the HQL-binding pocket. HQL-79 selectively inhibited PGD2 production by H-PGDS-expressing human megakaryocytes and rat mastocytoma cells with an IC50 value of about 100 microm but only marginally affected the production of other prostanoids, suggesting the tight functional engagement between H-PGDS and cyclooxygenase. Orally administered HQL-79 (30 mg/kg body weight) inhibited antigen-induced production of PGD2, without affecting the production of PGE2 and PGF2alpha, and ameliorated airway inflammation in wild-type and human H-PGDS-overexpressing mice. Knowledge about this structure of quaternary complex is useful for understanding the inhibitory mechanism of HQL-79 and should accelerate the structure-based development of novel anti-inflammatory drugs that inhibit PGD2 production specifically.
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Affiliation(s)
- Kosuke Aritake
- Department of Molecular Behavioral Biology, Osaka Bioscience Institute, 6-2-4, Furuedai, Suita, Osaka 565-0874, Japan
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24
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Affiliation(s)
- N Inamura
- Department of Pediatric Cardiology, Osaka Medical Center and Research Institute for Maternal and Child Health, 840 Murodo-cho, Izumi, Osaka, 594-1101, Japan.
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25
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Kado Y, Inoue T, Aritake K, Katsuyama N, Matsumura H, Urade Y, Kai Y. Crystal structure of hematopoietic prostaglandin D synthase complexed of HQL-79. Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305085132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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26
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Inoue T, Okano Y, Kado Y, Aritake K, Irikura D, Uodome N, Okazaki N, Kinugasa S, Shishitani H, Matsumura H, Kai Y, Urade Y. First Determination of the Inhibitor Complex Structure of Human Hematopoietic Prostaglandin D Synthase. J Biochem 2004; 135:279-83. [PMID: 15113825 DOI: 10.1093/jb/mvh033] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Hematopoietic prostaglandin (PG) D synthase (H-PGDS) is responsible for the production of PGD(2) as an allergy or inflammation mediator in mast and Th2 cells. We determined the X-ray structure of human H-PGDS complexed with an inhibitor, 2-(2'-benzothiazolyl)-5-styryl-3-(4'-phthalhydrazidyl) tetrazolium chloride (BSPT) at 1.9 A resolution in the presence of Mg(2+). The styryl group of the inhibitor penetrated to the bottom of the active site cleft, and the tetrazole ring was stabilized by the stacking interaction with Trp104, inducing large movement around the alpha5-helix, which caused the space group of the complex crystal to change from P2(1) to P1 upon binding of BSPT. The phthalhydrazidyl group of BSPT exhibited steric hindrance due to the cofactor, glutathione (GSH), increasing the IC(50) value of BSPT for human H-PGDS from 36.2 micro M to 98.1 micro M upon binding of Mg(2+), because the K(m) value of GSH for human H-PGDS was decreased from 0.60 micro M in the presence of EDTA to 0.14 micro M in the presence of Mg(2+). We have to avoid steric hindrance of the GSH molecule that was stabilized by intracellular Mg(2+) in the mM range in the cytosol for further development of structure-based anti-allergic drugs.
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Affiliation(s)
- Tsuyoshi Inoue
- Department of Materials Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871
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27
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Kado Y, Atobe M, Nonaka T. Ultrasonic effects on electroorganic processes--Part 20. Photocatalytic oxidation of aliphatic alcohols in aqueous suspension of TiO2 powder. Ultrason Sonochem 2001; 8:69-74. [PMID: 11326612 DOI: 10.1016/s1350-4177(00)00072-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Ultrasonic effects in a suspension system were examined using the photocatalytic oxidation of 2-propanol to acetone and of ethanol to acetaldehyde in the aqueous suspension of TiO2 powder as a model reaction. The formation rate of acetone was significantly increased under ultrasonic irradiation. The oxidation reaction under ultrasonic irradiation was affected in a different manner from that in silence by reaction conditions such as ultrasonic power, stirring speed, amount of TiO2, concentration of 2-propanol, and pretreatment of the TiO2 powder. Furthermore, it was also observed that the particle size of the TiO2 photocatalyst powder was increased due to the particle agglomeration by ultrasonic irradiation, and consequently it was suggested that ultrasound activates the surface of the catalyst. These results are discussed on the basis of not only the activation of the photocatalyst but also ultrasonic enhancement of mass transport of 2-propanol molecules.
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Affiliation(s)
- Y Kado
- Department of Electronic Chemistry, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan
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28
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Kurotobi S, Kado Y, Miki K, Hara T, Nakanishi K, Taniguchi M, Shin K, Honda A, Matsuoka T, Nagai T. Deletion of the long arm of chromosome 2 (2q22-q24.2): case report and review of the literature. Pediatr Int 2000; 42:582-4. [PMID: 11059557 DOI: 10.1046/j.1442-200x.2000.01262.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- S Kurotobi
- Department of Pediatrics, Toyonaka Municipal Hospital, Toyonaka City, Osaka, Japan.
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29
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Atobe M, Kado Y, Nonaka T. Ultrasonic effects on electroorganic processes. Part 14. Indirect electroreduction of benzyl chlorides with anthracene redox-mediatory system. Ultrason Sonochem 2000; 7:97-102. [PMID: 10909726 DOI: 10.1016/s1350-4177(99)00036-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Ultrasonic effects were observed in the indirect electroreduction of benzyl chlorides with a radical anion mediator electrogenerated from anthracene. Both the current efficiency for the toluenes formed and the current density (reaction rate) at a working electrode were significantly increased in potential-controlled electrolysis under ultrasonic irradiation (20 kHz). These effects are important from a practical aspect and are rationalized as being due to mass transport promotion caused by ultrasonic cavitation. Although the efficiency could be also increased in the direct electroreduction in the absence of the mediator under irradiation, the current density was only slightly increased.
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Affiliation(s)
- M Atobe
- Department of Electronic Chemistry, Tokyo Institute of Technology, Yokohama, Japan.
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30
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Abstract
We report an 11-year-old girl with euthyroid Graves' disease. She was referred to our clinic because of left exophthalmos without other symptoms suggestive of hyperthyroidism. Her serum concentration of free thyroxine (FT4) and free triiodothyronine (FT3) were normal, but thyroid-stimulating hormone (TSH) was below normal and impaired TSH response to TSH releasing hormone (TRH) was found. Although the sera were positive for anti-TSH receptor antibody (TRAb) and thyroid-stimulating antibody (TSAb), both titers were not as high as usually observed in Graves' disease. Three months later, she developed hyperthyroidism and was treated with propylthiouracil. Within 2 weeks of the initiation of therapy, all symptoms except exophthalmos disappeared, and after 2 months of treatment TRAb was negative though TSAb remained positive. TSAb is therefore a good indicator to use in the diagnosis and follow-up of euthyroid Graves' disease and should be measured in patients with exophthalmos of unknown origin, even in children.
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Affiliation(s)
- T Kubo
- Department of Pediatrics, National Iwakuni Hospital, Japan
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31
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Takizawa Y, Shimizu H, Pulkkinen L, Nonaka S, Kubo T, Kado Y, Nishikawa T, Uitto J. Novel premature termination codon mutations in the laminin gamma2-chain gene (LAMC2) in Herlitz junctional epidermolysis bullosa. J Invest Dermatol 1998; 111:1233-4. [PMID: 9856849 DOI: 10.1046/j.1523-1747.1998.00438.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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32
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Morimoto Y, Yutani Y, Kado Y, Iida T, Shiota M, Takeuchi Y. Protective effects of neutral amino acids against amphipathic drug-induced hemolysis. Biol Pharm Bull 1995; 18:1535-8. [PMID: 8593474 DOI: 10.1248/bpb.18.1535] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Some neutral amino acids were compared for their anti-hemolytic effects with sugars which are well-known colloid-osmotic protectants. The kinetic studies in isotonic suspensions of erythrocytes indicated that the hemolysis induced by the amphipathic drug chlorpromazine (CPZ) or flufenamic acid (FA) was retarded by addition of sugars, and the degree of the anti-hemolytic effect increased with increases in molecular size. Phenylalanine (Phe), the largest among the amino acids tested, showed the greatest inhibitory effect on CPZ-induced hemolysis, but not on FA-induced hemolysis. This demonstrated that the anti-hemolytic effects of amino acids were not the result of colloid-osmotic protection. Hemolytic actions of amino acids were also examined to determine their interaction with the erythrocyte membrane, and the mechanism of their inhibitory effects against amphipathic drug-induced hemolysis was discussed.
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Affiliation(s)
- Y Morimoto
- Department of Pharmaceutics, Faculty of Pharmaceutical Sciences, Kobe-Gakuin University, Japan
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33
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Kado Y, Okita K, Takemoto T. [Peripheral lymphocyte examination--evaluation and application of the tests in the diagnosis of liver disease]. Rinsho Byori 1986; 34 Spec No 67:216-22. [PMID: 3534357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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34
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Ogino M, Okita K, Nawata H, Yasanaga M, Shingai Y, Kado Y, Oda M, Ezaki T, Matsuda S, Ando K. [Purification of a new glutathione S-transferase from rat liver cytosol and its significance during hepatocarcinogenesis]. Nihon Shokakibyo Gakkai Zasshi 1984; 81:1012-8. [PMID: 6748311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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35
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Hanta T, Okita K, Matsuda S, Konishi T, Yasunaga M, Kado Y, Nawata H, Ogino M, Shingai Y, Fukumoto Y. [A case of fulminant hepatitis developing in a HBsAG carrier after chemotherapy of malignant lymphoma]. Nihon Shokakibyo Gakkai Zasshi 1984; 81:1089-93. [PMID: 6748319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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36
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Noda K, Esaki T, Murata M, Ogino M, Kado Y, Konishi T, Okita K, Takemoto T. [Purification of human microsomal epoxide hydrolase and study on its localization in hepatocellular carcinoma tissue]. Nihon Shokakibyo Gakkai Zasshi 1984; 81:874-9. [PMID: 6205180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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37
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Matsushima O, Hayashi Y, Katayama H, Yamada K, Kado Y. Effect of metabolic inhibitors on hyperosmotically induced free amino acid accumulation in the isolated foot muscle of the brackish-water bivalve Corbicula japonica. ACTA ACUST UNITED AC 1984. [DOI: 10.1016/0300-9629(84)90469-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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38
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Fukuhara K, Fujii T, Kado Y, Watanabe N. [Reproduction studies on ceftizoxime sodium in rats (author's transl)]. Jpn J Antibiot 1981; 34:466-76. [PMID: 6270393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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39
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Takashima T, Kado Y, Kumada S. Pharmacological investigations of benzothiazoline derivatives. Arzneimittelforschung 1972; 22:711-5. [PMID: 5068252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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