메뉴 건너뛰기




Volumn 82, Issue 11, 2011, Pages 1521-1527

What we have learned from crystal structures of proteins to receptor function

Author keywords

Function; Ligand gated channel; Pharmacology; Structure

Indexed keywords

1,4 DIAZABICYCLO[3.2.2]NONANE 4 CARBOXYLIC ACID 4 BROMOPHENYL ESTER; 4 AMINOBUTYRIC ACID A RECEPTOR; 4 CHLORO N (3 QUINUCLIDINYL)BENZAMIDE; ACETYLCHOLINE BINDING PROTEIN; AGENTS INTERACTING WITH TRANSMITTER, HORMONE OR DRUG RECEPTORS; AZETIDINE DERIVATIVE; BINDING PROTEIN; CARBON; CYTISINE; EPIBATIDINE; FLUORINE; GLYCINE RECEPTOR; LIGAND GATED ION CHANNEL; METABOTROPIC RECEPTOR; NEUROTRANSMITTER; NGB 5 5; NICOTINE; NICOTINIC AGENT; NICOTINIC RECEPTOR; NICOTINIC RECEPTOR BLOCKING AGENT; NITROGEN; OXYGEN; PROTEIN; PURINERGIC P2X RECEPTOR; RECEPTOR; SAZETIDINE A; SEROTONIN 3 RECEPTOR; TROPISETRON; UNCLASSIFIED DRUG; UNINDEXED DRUG; VARENICLINE;

EID: 80255135633     PISSN: 00062952     EISSN: 18732968     Source Type: Journal    
DOI: 10.1016/j.bcp.2011.07.061     Document Type: Note
Times cited : (9)

References (54)
  • 1
    • 13444271681 scopus 로고    scopus 로고
    • Refined structure of the nicotinic acetylcholine receptor at 4 A resolution
    • DOI 10.1016/j.jmb.2004.12.031
    • N. Unwin Refined structure of the nicotinic acetylcholine receptor at 4A resolution J Mol Biol 346 2005 967 989 (Pubitemid 40215523)
    • (2005) Journal of Molecular Biology , vol.346 , Issue.4 , pp. 967-989
    • Unwin, N.1
  • 2
    • 79957953215 scopus 로고    scopus 로고
    • Principles of activation and permeation in an anion-selective Cys-loop receptor
    • R.E. Hibbs, and E. Gouaux Principles of activation and permeation in an anion-selective Cys-loop receptor Nature 2011
    • (2011) Nature
    • Hibbs, R.E.1    Gouaux, E.2
  • 4
    • 0027522236 scopus 로고
    • Functional architecture of the nicotinic acetylcholine receptor: A prototype of ligand-gated ion channels
    • DOI 10.1007/BF02505755
    • A. Devillers-Thiéry, J.L. Galzi, J.L. Eiselé, S. Bertrand, D. Bertrand, and J.P. Changeux Functional architecture of the nicotinic acetylcholine receptor: a prototype of ligand-gated ion channels J Membr Biol 136 1993 97 112 (Pubitemid 23353232)
    • (1993) Journal of Membrane Biology , vol.136 , Issue.2 , pp. 97-112
    • Devillers-Thiery, A.1    Galzi, J.L.2    Eisele, J.L.3    Bertrand, S.4    Bertrand, D.5    Changeux, J.P.6
  • 5
    • 0030991790 scopus 로고    scopus 로고
    • Molecular determinants of agonist discrimination by NMDA receptor subunits: Analysis of the glutamate binding site on the NR2B subunit
    • DOI 10.1016/S0896-6273(00)81249-0
    • B. Laube, H. Hirai, M. Sturgess, H. Betz, and J. Kuhse Molecular determinants of agonist discrimination by NMDA receptor subunits: analysis of the glutamate binding site on the NR2B subunit Neuron 18 1997 493 503 (Pubitemid 27138796)
    • (1997) Neuron , vol.18 , Issue.3 , pp. 493-503
    • Laube, B.1    Hirai, H.2    Sturgess, M.3    Betz, H.4    Kuhse, J.5
  • 6
    • 0036788971 scopus 로고    scopus 로고
    • Molecular physiology of P2X receptors
    • R.A. North Molecular physiology of P2X receptors Physiol Rev 82 2002 1013 1067
    • (2002) Physiol Rev , vol.82 , pp. 1013-1067
    • North, R.A.1
  • 7
    • 67949117176 scopus 로고    scopus 로고
    • Crystal structure of the ATP-gated P2X(4) ion channel in the closed state
    • T. Kawate, J.C. Michel, W.T. Birdsong, and E. Gouaux Crystal structure of the ATP-gated P2X(4) ion channel in the closed state Nature 460 2009 592 598
    • (2009) Nature , vol.460 , pp. 592-598
    • Kawate, T.1    Michel, J.C.2    Birdsong, W.T.3    Gouaux, E.4
  • 8
    • 72049124287 scopus 로고    scopus 로고
    • X-ray structure, symmetry and mechanism of an AMPA-subtype glutamate receptor
    • A.I. Sobolevsky, M.P. Rosconi, and E. Gouaux X-ray structure, symmetry and mechanism of an AMPA-subtype glutamate receptor Nature 462 2009 745 756
    • (2009) Nature , vol.462 , pp. 745-756
    • Sobolevsky, A.I.1    Rosconi, M.P.2    Gouaux, E.3
  • 10
    • 0029658739 scopus 로고    scopus 로고
    • Human α4β2 neuronal nicotinic acetylcholine receptor in HEK 293 cells: A patch-clamp study
    • B. Buisson, M. Gopalakrishnan, S.P. Arneric, J.P. Sullivan, and D. Bertrand Human alpha4beta2 neuronal nicotinic acetylcholine receptor in HEK 293 cells: a patch-clamp study J Neurosci 16 1996 7880 7891 (Pubitemid 26405051)
    • (1996) Journal of Neuroscience , vol.16 , Issue.24 , pp. 7880-7891
    • Buisson, B.1    Gopalakrishnan, M.2    Arneric, S.P.3    Sullivan, J.P.4    Bertrand, D.5
  • 11
    • 20444368757 scopus 로고    scopus 로고
    • Chronic nicotine exposure upregulates nicotinic receptors by a novel mechanism
    • DOI 10.1523/JNEUROSCI.5240-04.2005
    • Y.F. Vallejo, B. Buisson, D. Bertrand, and W.N. Green Chronic nicotine exposure upregulates nicotinic receptors by a novel mechanism J Neurosci 25 2005 5563 5572 (Pubitemid 40800648)
    • (2005) Journal of Neuroscience , vol.25 , Issue.23 , pp. 5563-5572
    • Vallejo, Y.F.1    Buisson, B.2    Bertrand, D.3    Green, W.N.4
  • 12
    • 0025610842 scopus 로고
    • The TiPS lecture. the nicotinic acetylcholine receptor: An allosteric protein prototype of ligand-gated ion channels
    • J.P. Changeux The TiPS lecture. The nicotinic acetylcholine receptor: an allosteric protein prototype of ligand-gated ion channels Trends Pharmacol Sci 11 1990 485 492
    • (1990) Trends Pharmacol Sci , vol.11 , pp. 485-492
    • Changeux, J.P.1
  • 13
    • 20344370764 scopus 로고    scopus 로고
    • Allosteric mechanisms of signal transduction
    • DOI 10.1126/science.1108595
    • J.P. Changeux, and S.J. Edelstein Allosteric mechanisms of signal transduction Science 308 2005 1424 1428 (Pubitemid 40791288)
    • (2005) Science , vol.308 , Issue.5727 , pp. 1424-1428
    • Changeux, J.-P.1    Edelstein, S.J.2
  • 14
    • 33845994435 scopus 로고    scopus 로고
    • Partial agonists as therapeutic agents at neuronal nicotinic acetylcholine receptors
    • DOI 10.1016/j.bcp.2006.08.010, PII S0006295206005028
    • R.C. Hogg, and D. Bertrand Partial agonists as therapeutic agents at neuronal nicotinic acetylcholine receptors Biochem Pharmacol 73 2007 459 468 (Pubitemid 46043572)
    • (2007) Biochemical Pharmacology , vol.73 , Issue.4 , pp. 459-468
    • Hogg, R.C.1    Bertrand, D.2
  • 16
    • 0028036881 scopus 로고
    • Cloning of an avermectin-sensitive glutamate-gated chloride channel from Caenorhabditis elegans
    • DOI 10.1038/371707a0
    • D.F. Cully, D.K. Vassilatis, K.K. Liu, P.S. Paress, L.H. Van der Ploeg, and J.M. Schaeffer Cloning of an avermectin-sensitive glutamate-gated chloride channel from Caenorhabditis elegans Nature 371 1994 707 711 (Pubitemid 24327331)
    • (1994) Nature , vol.371 , Issue.6499 , pp. 707-711
    • Cully, D.F.1    Vassilatis, D.K.2    Liu, K.K.3    Paress, P.S.4    Van Der Ploeg, L.H.T.5    Schaeffer, J.M.6    Arena, J.P.7
  • 17
    • 77954926628 scopus 로고    scopus 로고
    • Nicotinic acetylcholine receptor transmembrane mutations convert ivermectin from a positive to a negative allosteric modulator
    • T. Collins, and N.S. Millar Nicotinic acetylcholine receptor transmembrane mutations convert ivermectin from a positive to a negative allosteric modulator Mol Pharmacol 78 2010 198 204
    • (2010) Mol Pharmacol , vol.78 , pp. 198-204
    • Collins, T.1    Millar, N.S.2
  • 18
    • 34147179943 scopus 로고    scopus 로고
    • Ivermectin Interaction with Transmembrane Helices Reveals Widespread Rearrangements during Opening of P2X Receptor Channels
    • DOI 10.1016/j.neuron.2007.03.020, PII S0896627307002425
    • S.D. Silberberg, M. Li, and K.J. Swartz Ivermectin interaction with transmembrane helices reveals widespread rearrangements during opening of P2X receptor channels Neuron 54 2007 263 274 (Pubitemid 46561201)
    • (2007) Neuron , vol.54 , Issue.2 , pp. 263-274
    • Silberberg, S.D.1    Li, M.2    Swartz, K.J.3
  • 19
    • 23844449940 scopus 로고    scopus 로고
    • Computer-based de novo design of drug-like molecules
    • DOI 10.1038/nrd1799
    • G. Schneider, and U. Fechner Computer-based de novo design of drug-like molecules Nat Rev Drug Discov 4 2005 649 663 (Pubitemid 41149759)
    • (2005) Nature Reviews Drug Discovery , vol.4 , Issue.8 , pp. 649-663
    • Schneider, G.1    Fechner, U.2
  • 20
    • 33745199815 scopus 로고    scopus 로고
    • Virtual ligand screening: Strategies, perspectives and limitations
    • G. Klebe Virtual ligand screening: strategies, perspectives and limitations Drug Discov Today 11 2006 580 594
    • (2006) Drug Discov Today , vol.11 , pp. 580-594
    • Klebe, G.1
  • 22
    • 77649220192 scopus 로고    scopus 로고
    • Current trends in ligand-based virtual screening: Molecular representations, data mining methods, new application areas, and performance evaluation
    • H. Geppert, M. Vogt, and J. Bajorath Current trends in ligand-based virtual screening: molecular representations, data mining methods, new application areas, and performance evaluation J Chem Inform Model 50 2010 205 216
    • (2010) J Chem Inform Model , vol.50 , pp. 205-216
    • Geppert, H.1    Vogt, M.2    Bajorath, J.3
  • 24
    • 77952772341 scopus 로고    scopus 로고
    • Extended-connectivity fingerprints
    • D. Rogers, and M. Hahn Extended-connectivity fingerprints J Chem Inform Model 50 2010 742 754
    • (2010) J Chem Inform Model , vol.50 , pp. 742-754
    • Rogers, D.1    Hahn, M.2
  • 27
    • 67849104638 scopus 로고    scopus 로고
    • PubChem: A public information system for analyzing bioactivities of small molecules
    • Y. Wang, J. Xiao, T.O. Suzek, J. Zhang, J. Wang, and S.H. Bryant PubChem: a public information system for analyzing bioactivities of small molecules Nucl Acids Res 37 2009 W623 W633
    • (2009) Nucl Acids Res , vol.37
    • Wang, Y.1    Xiao, J.2    Suzek, T.O.3    Zhang, J.4    Wang, J.5    Bryant, S.H.6
  • 29
    • 61749093196 scopus 로고    scopus 로고
    • ChEMBL. An interview with John Overington, team leader, chemogenomics at the European Bioinformatics Institute Outstation of the European Molecular Biology Laboratory (EMBL-EBI). Interview by Wendy A. Warr
    • J. Overington ChEMBL. An interview with John Overington, team leader, chemogenomics at the European Bioinformatics Institute Outstation of the European Molecular Biology Laboratory (EMBL-EBI). Interview by Wendy A. Warr J Comput Aid Mol Des 23 2009 195 198
    • (2009) J Comput Aid Mol des , vol.23 , pp. 195-198
    • Overington, J.1
  • 30
    • 61949166066 scopus 로고    scopus 로고
    • How similar are similarity searching methods? A principal component analysis of molecular descriptor space
    • A. Bender, J.L. Jenkins, J. Scheiber, S.C. Sukuru, M. Glick, and J.W. Davies How similar are similarity searching methods? A principal component analysis of molecular descriptor space J Chem Inform Model 49 2009 108 119
    • (2009) J Chem Inform Model , vol.49 , pp. 108-119
    • Bender, A.1    Jenkins, J.L.2    Scheiber, J.3    Sukuru, S.C.4    Glick, M.5    Davies, J.W.6
  • 32
    • 80955180072 scopus 로고    scopus 로고
    • Visualisation of the chemical space of fragments, lead-like and drug-like molecules in PubChem
    • R. van Deursen, L.C. Blum, and J.L. Reymond Visualisation of the chemical space of fragments, lead-like and drug-like molecules in PubChem J Comput Aided Mol Des 2011
    • (2011) J Comput Aided Mol des
    • Van Deursen, R.1    Blum, L.C.2    Reymond, J.L.3
  • 33
    • 65549108234 scopus 로고    scopus 로고
    • Virtual screening - What does it give us?
    • H. Koeppen Virtual screening - what does it give us? Curr Opin Drug Discov Dev 12 2009 397 407
    • (2009) Curr Opin Drug Discov Dev , vol.12 , pp. 397-407
    • Koeppen, H.1
  • 34
    • 29144435115 scopus 로고    scopus 로고
    • From ligand design to therapeutic efficacy: The challenge for nicotinic receptor research
    • DOI 10.1016/S1359-6446(05)03665-2, PII S1359644605036652
    • B.K. Cassels, I. Bermudez, F. Dajas, J.A. Abin-Carriquiry, and S. Wonnacott From ligand design to therapeutic efficacy: the challenge for nicotinic receptor research Drug Discov Today 10 2005 1657 1665 (Pubitemid 41817614)
    • (2005) Drug Discovery Today , vol.10 , Issue.23-24 , pp. 1657-1665
    • Cassels, B.K.1    Bermudez, I.2    Dajas, F.3    Abin-Carriquiry, J.A.4    Wonnacott, S.5
  • 35
    • 23944472732 scopus 로고    scopus 로고
    • Nicotinic agonists, antagonists, and modulators from natural sources
    • DOI 10.1007/s10571-005-3968-4
    • J.W. Daly Nicotinic agonists, antagonists, and modulators from natural sources Cell Mol Neurobiol 25 2005 513 552 (Pubitemid 41199710)
    • (2005) Cellular and Molecular Neurobiology , vol.25 , Issue.3-4 , pp. 513-552
    • Daly, J.W.1
  • 36
    • 1842475289 scopus 로고    scopus 로고
    • Nicotine and carbamylcholine binding to nicotinic acetylcholine receptors as studied in AChBP crystal structures
    • DOI 10.1016/S0896-6273(04)00115-1, PII S0896627304001151
    • P.H. Celie, S.E. van Rossum-Fikkert, W.J. van Dijk, K. Brejc, A.B. Smit, and T.K. Sixma Nicotine and carbamylcholine binding to nicotinic acetylcholine receptors as studied in AChBP crystal structures Neuron 41 2004 907 914 (Pubitemid 38429734)
    • (2004) Neuron , vol.41 , Issue.6 , pp. 907-914
    • Celie, P.H.N.1    Van Rossum-Fikkert, S.E.2    Van Dijk, W.J.3    Brejc, K.4    Smit, A.B.5    Sixma, T.K.6
  • 37
    • 27144473613 scopus 로고    scopus 로고
    • Structures of Aplysia AChBP complexes with nicotinic agonists and antagonists reveal distinctive binding interfaces and conformations
    • DOI 10.1038/sj.emboj.7600828, PII 7600828
    • S.B. Hansen, G. Sulzenbacher, T. Huxford, P. Marchot, P. Taylor, and Y. Bourne Structures of Aplysia AChBP complexes with nicotinic agonists and antagonists reveal distinctive binding interfaces and conformations EMBO J 24 2005 3635 3646 (Pubitemid 41509370)
    • (2005) EMBO Journal , vol.24 , Issue.20 , pp. 3635-3646
    • Hansen, S.B.1    Sulzenbacher, G.2    Huxford, T.3    Marchot, P.4    Taylor, P.5    Bourne, Y.6
  • 38
    • 0033636314 scopus 로고    scopus 로고
    • Mechanisms for activation and antagonism of an AMPA-sensitive glutamate receptor: Crystal structures of the GluR2 ligand binding core
    • N. Armstrong, and E. Gouaux Mechanisms for activation and antagonism of an AMPA-sensitive glutamate receptor: crystal structures of the GluR2 ligand binding core Neuron 28 2000 165 181
    • (2000) Neuron , vol.28 , pp. 165-181
    • Armstrong, N.1    Gouaux, E.2
  • 39
    • 65249093007 scopus 로고    scopus 로고
    • Use of acetylcholine binding protein in the search for novel alpha7 nicotinic receptor ligands. in silico docking, pharmacological screening, and X-ray analysis
    • C. Ulens, A. Akdemir, A. Jongejan, R. van Elk, S. Bertrand, and A. Perrakis Use of acetylcholine binding protein in the search for novel alpha7 nicotinic receptor ligands. In silico docking, pharmacological screening, and X-ray analysis J Med Chem 52 2009 2372 2383
    • (2009) J Med Chem , vol.52 , pp. 2372-2383
    • Ulens, C.1    Akdemir, A.2    Jongejan, A.3    Van Elk, R.4    Bertrand, S.5    Perrakis, A.6
  • 40
    • 0031552362 scopus 로고    scopus 로고
    • Development and validation of a genetic algorithm for flexible docking
    • DOI 10.1006/jmbi.1996.0897
    • G. Jones, P. Willett, R.C. Glen, A.R. Leach, and R. Taylor Development and validation of a genetic algorithm for flexible docking J Mol Biol 267 1997 727 748 (Pubitemid 27170693)
    • (1997) Journal of Molecular Biology , vol.267 , Issue.3 , pp. 727-748
    • Jones, G.1    Willett, P.2    Glen, R.C.3    Leach, A.R.4    Taylor, R.5
  • 41
    • 0004529124 scopus 로고    scopus 로고
    • Mutated nicotinic receptors responsible for autosomal dominant nocturnal frontal lobe epilepsy are more sensitive to carbamazepine
    • DOI 10.1111/j.1528-1157.1999.tb00848.x
    • F. Picard, S. Bertrand, O.K. Steinlein, and D. Bertrand Mutated nicotinic receptors responsible for autosomal dominant nocturnal frontal lobe epilepsy are more sensitive to carbamazepine Epilepsia 40 1999 1198 1209 (Pubitemid 29416388)
    • (1999) Epilepsia , vol.40 , Issue.9 , pp. 1198-1209
    • Picard, F.1    Bertrand, S.2    Steinlein, O.K.3    Bertrand, D.4
  • 42
    • 0031977071 scopus 로고    scopus 로고
    • Open-channel blockers at the human α4β2 neuronal nicotinic acetylcholine receptor
    • B. Buisson, and D. Bertrand Open-channel blockers at the human alpha4beta2 neuronal nicotinic acetylcholine receptor Mol Pharmacol 53 1998 555 563 (Pubitemid 28162880)
    • (1998) Molecular Pharmacology , vol.53 , Issue.3 , pp. 555-563
    • Buisson, B.1    Bertrand, D.2
  • 46
    • 67649619336 scopus 로고    scopus 로고
    • 970 million druglike small molecules for virtual screening in the chemical universe database GDB-13
    • L.C. Blum, and J.L. Reymond 970 million druglike small molecules for virtual screening in the chemical universe database GDB-13 J Am Chem Soc 131 2009 8732 8733
    • (2009) J Am Chem Soc , vol.131 , pp. 8732-8733
    • Blum, L.C.1    Reymond, J.L.2
  • 47
    • 34247194965 scopus 로고    scopus 로고
    • Virtual exploration of the chemical universe up to 11 atoms of C, N, O, F: Assembly of 26.4 million structures (110.9 million stereoisomers) and analysis for new ring systems, stereochemistry, physicochemical properties, compound classes, and drug discovery
    • DOI 10.1021/ci600423u
    • T. Fink, and J.L. Reymond Virtual exploration of the chemical universe up to 11 atoms of C, N, O, F: assembly of 26.4 million structures (110.9 million stereoisomers) and analysis for new ring systems, stereochemistry, physicochemical properties, compound classes, and drug discovery J Chem Inform Model 47 2007 342 353 (Pubitemid 46615939)
    • (2007) Journal of Chemical Information and Modeling , vol.47 , Issue.2 , pp. 342-353
    • Fink, T.1    Raymond, J.-L.2
  • 48
    • 16244388286 scopus 로고    scopus 로고
    • Virtual exploration of the small-molecule chemical universe below 160 daltons
    • DOI 10.1002/anie.200462457
    • T. Fink, H. Bruggesser, and J.L. Reymond Virtual exploration of the small-molecule chemical universe below 160 daltons Angew Chem Int Ed Engl 44 2005 1504 1508 (Pubitemid 40460043)
    • (2005) Angewandte Chemie - International Edition , vol.44 , Issue.10 , pp. 1504-1508
    • Fink, T.1    Bruggesser, H.2    Reymond, J.-L.3
  • 49
    • 77957956614 scopus 로고    scopus 로고
    • Identification of selective norbornane-type aspartate analogue inhibitors of the glutamate transporter 1 (GLT-1) from the chemical universe generated database (GDB)
    • E. Luethi, K.T. Nguyen, M. Burzle, L.C. Blum, Y. Suzuki, and M. Hediger Identification of selective norbornane-type aspartate analogue inhibitors of the glutamate transporter 1 (GLT-1) from the chemical universe generated database (GDB) J Med Chem 53 2010 7236 7250
    • (2010) J Med Chem , vol.53 , pp. 7236-7250
    • Luethi, E.1    Nguyen, K.T.2    Burzle, M.3    Blum, L.C.4    Suzuki, Y.5    Hediger, M.6
  • 50
    • 67649654027 scopus 로고    scopus 로고
    • 3-(aminomethyl)piperazine-2,5-dione as a novel NMDA glycine site inhibitor from the chemical universe database GDB
    • K.T. Nguyen, E. Luethi, S. Syed, S. Urwyler, S. Bertrand, and D. Bertrand 3-(aminomethyl)piperazine-2,5-dione as a novel NMDA glycine site inhibitor from the chemical universe database GDB Bioorg Med Chem Lett 19 2009 3832 3835
    • (2009) Bioorg Med Chem Lett , vol.19 , pp. 3832-3835
    • Nguyen, K.T.1    Luethi, E.2    Syed, S.3    Urwyler, S.4    Bertrand, S.5    Bertrand, D.6
  • 51
    • 54849416977 scopus 로고    scopus 로고
    • Discovery of NMDA glycine site inhibitors from the chemical universe database GDB
    • K.T. Nguyen, S. Syed, S. Urwyler, S. Bertrand, D. Bertrand, and J.L. Reymond Discovery of NMDA glycine site inhibitors from the chemical universe database GDB ChemMedChem 3 2008 1520 1524
    • (2008) ChemMedChem , vol.3 , pp. 1520-1524
    • Nguyen, K.T.1    Syed, S.2    Urwyler, S.3    Bertrand, S.4    Bertrand, D.5    Reymond, J.L.6
  • 54
    • 34548677767 scopus 로고    scopus 로고
    • Allosteric modulation of nicotinic acetylcholine receptors
    • DOI 10.1016/j.bcp.2007.07.011, PII S0006295207004637
    • D. Bertrand, and M. Gopalakrishnan Allosteric modulation of nicotinic acetylcholine receptors Biochem Pharmacol 74 2007 1155 1163 (Pubitemid 47417931)
    • (2007) Biochemical Pharmacology , vol.74 , Issue.8 , pp. 1155-1163
    • Bertrand, D.1    Gopalakrishnan, M.2


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.