메뉴 건너뛰기




Volumn 7, Issue 2, 2011, Pages

The free energy landscape of small molecule unbinding

Author keywords

[No Author keywords available]

Indexed keywords

ATOMS; BINDING ENERGY; DISSOCIATION; FREE ENERGY; HYDROGEN BONDS; MOLECULAR DYNAMICS; PROTEINS;

EID: 79952457753     PISSN: 1553734X     EISSN: 15537358     Source Type: Journal    
DOI: 10.1371/journal.pcbi.1002002     Document Type: Article
Times cited : (96)

References (66)
  • 1
    • 33847381100 scopus 로고    scopus 로고
    • A decade of fragment-based drug design: strategic advances and lessons learned
    • Hajduk PJ, Greer J, (2007) A decade of fragment-based drug design: strategic advances and lessons learned. Nat Rev Drug Discov 6: 211-9.
    • (2007) Nat Rev Drug Discov , vol.6 , pp. 211-219
    • Hajduk, P.J.1    Greer, J.2
  • 2
    • 46849089254 scopus 로고    scopus 로고
    • Recent developments in fragment-based drug discovery
    • Congreve M, Chessari G, Tisi D, Woodhead AJ, (2008) Recent developments in fragment-based drug discovery. J Med Chem 51: 3661-3680.
    • (2008) J Med Chem , vol.51 , pp. 3661-3680
    • Congreve, M.1    Chessari, G.2    Tisi, D.3    Woodhead, A.J.4
  • 3
    • 1642357706 scopus 로고    scopus 로고
    • The many roles of computation in drug discovery
    • Jorgensen WL, (2004) The many roles of computation in drug discovery. Science 303: 1813-1818.
    • (2004) Science , vol.303 , pp. 1813-1818
    • Jorgensen, W.L.1
  • 4
    • 76649089979 scopus 로고    scopus 로고
    • Library screening by fragment-based docking
    • Huang D, Caflisch A, (2010) Library screening by fragment-based docking. J Mol Recognit 23: 183-93.
    • (2010) J Mol Recognit , vol.23 , pp. 183-193
    • Huang, D.1    Caflisch, A.2
  • 5
    • 68249132213 scopus 로고    scopus 로고
    • Computational fragment-based binding site identification by ligand competitive saturation
    • Guvench O, MacKerell ADJ, (2009) Computational fragment-based binding site identification by ligand competitive saturation. PLoS Comput Biol 5: e1000435.
    • (2009) PLoS Comput Biol , vol.5
    • Guvench, O.1    MacKerell, A.D.J.2
  • 6
    • 65449159794 scopus 로고    scopus 로고
    • Binding site detection and druggability index from first principles
    • Seco J, Luque FJ, Barril X, (2009) Binding site detection and druggability index from first principles. J Med Chem 52: 2363-71.
    • (2009) J Med Chem , vol.52 , pp. 2363-2371
    • Seco, J.1    Luque, F.J.2    Barril, X.3
  • 7
    • 68149095775 scopus 로고    scopus 로고
    • Flaviviral protease inhibitors identified by fragment-based library docking into a structure generated by molecular dynamics
    • Ekonomiuk D, Su XC, Bodenreider C, Lim SP, Otting G, et al. (2009) Flaviviral protease inhibitors identified by fragment-based library docking into a structure generated by molecular dynamics. J Med Chem 52: 4860-8.
    • (2009) J Med Chem , vol.52 , pp. 4860-4868
    • Ekonomiuk, D.1    Su, X.C.2    Bodenreider, C.3    Lim, S.P.4    Otting, G.5
  • 8
    • 75149134332 scopus 로고    scopus 로고
    • Toward the rational design of p53-stabilizing drugs: probing the surface of the oncogenic Y220C mutant
    • Basse N, Kaar JL, Settanni G, Joerger AC, Rutherford TJ, et al. (2010) Toward the rational design of p53-stabilizing drugs: probing the surface of the oncogenic Y220C mutant. Chem Biol 17: 46-56.
    • (2010) Chem Biol , vol.17 , pp. 46-56
    • Basse, N.1    Kaar, J.L.2    Settanni, G.3    Joerger, A.C.4    Rutherford, T.J.5
  • 9
    • 25844493057 scopus 로고    scopus 로고
    • Change of the unbinding mechanism upon a mutation: A molecular dynamics study of an antibody-hapten complex
    • Curcio R, Caflisch A, Paci E, (2005) Change of the unbinding mechanism upon a mutation: A molecular dynamics study of an antibody-hapten complex. Protein Science 14: 2499-2514.
    • (2005) Protein Science , vol.14 , pp. 2499-2514
    • Curcio, R.1    Caflisch, A.2    Paci, E.3
  • 10
    • 77952844866 scopus 로고    scopus 로고
    • Single-molecule pulling simulations can discern active from inactive enzyme inhibitors
    • Colizzi F, Perozzo R, Scapozza L, Recanatini M, Cavalli A, (2010) Single-molecule pulling simulations can discern active from inactive enzyme inhibitors. J Am Chem Soc 132: 7361-7371.
    • (2010) J Am Chem Soc , vol.132 , pp. 7361-7371
    • Colizzi, F.1    Perozzo, R.2    Scapozza, L.3    Recanatini, M.4    Cavalli, A.5
  • 11
    • 4143090730 scopus 로고    scopus 로고
    • The protein folding network
    • Rao F, Caflisch A, (2004) The protein folding network. J Mol Biol 342: 299-306.
    • (2004) J Mol Biol , vol.342 , pp. 299-306
    • Rao, F.1    Caflisch, A.2
  • 12
    • 2942567954 scopus 로고    scopus 로고
    • Describing protein folding kinetics by molecular dynamics simulations. 1. Theory
    • Swope W, Pitera J, Suits F, (2004) Describing protein folding kinetics by molecular dynamics simulations. 1. Theory. J Phys Chem B 108: 6571-6581.
    • (2004) J Phys Chem B , vol.108 , pp. 6571-6581
    • Swope, W.1    Pitera, J.2    Suits, F.3
  • 13
    • 33746567202 scopus 로고    scopus 로고
    • One-dimensional free-energy profiles of complex systems: Progress variables that preserve the barriers
    • Krivov SV, Karplus M, (2006) One-dimensional free-energy profiles of complex systems: Progress variables that preserve the barriers. J Phys Chem B 110: 12689-12698.
    • (2006) J Phys Chem B , vol.110 , pp. 12689-12698
    • Krivov, S.V.1    Karplus, M.2
  • 14
    • 32344450229 scopus 로고    scopus 로고
    • Network and graph analyses of folding free energy surfaces
    • Caflisch A, (2006) Network and graph analyses of folding free energy surfaces. Curr Opin Struct Biol 16: 71-78.
    • (2006) Curr Opin Struct Biol , vol.16 , pp. 71-78
    • Caflisch, A.1
  • 15
    • 34247338100 scopus 로고    scopus 로고
    • Automatic discovery of metastable states for the construction of Markov models of macromolecular conformational dynamics
    • Chodera JD, Singhal N, Pande VS, Dill K, Swope WC, (2007) Automatic discovery of metastable states for the construction of Markov models of macromolecular conformational dynamics. J Chem Phys 126: 155101.
    • (2007) J Chem Phys , vol.126 , pp. 155101
    • Chodera, J.D.1    Singhal, N.2    Pande, V.S.3    Dill, K.4    Swope, W.C.5
  • 16
    • 34247339716 scopus 로고    scopus 로고
    • Hierarchical analysis of conformational dynamics in biomolecules: Transition networks of metastable states
    • Noé F, Horenko I, Schuette C, Smith JC, (2007) Hierarchical analysis of conformational dynamics in biomolecules: Transition networks of metastable states. J Chem Phys 126: 155102.
    • (2007) J Chem Phys , vol.126 , pp. 155102
    • Noé, F.1    Horenko, I.2    Schuette, C.3    Smith, J.C.4
  • 17
    • 42149175435 scopus 로고    scopus 로고
    • Transition networks for modeling the kinetics of conformational changes in macromolecules
    • Noé F, Fischer S, (2008) Transition networks for modeling the kinetics of conformational changes in macromolecules. Curr Opin Struct Biol 18: 154-162.
    • (2008) Curr Opin Struct Biol , vol.18 , pp. 154-162
    • Noé, F.1    Fischer, S.2
  • 18
    • 44949178407 scopus 로고    scopus 로고
    • Coarse Master Equations for Peptide Folding Dynamics
    • Buchete N, Hummer G, (2008) Coarse Master Equations for Peptide Folding Dynamics. J Phys Chem B 112: 6057-6069.
    • (2008) J Phys Chem B , vol.112 , pp. 6057-6069
    • Buchete, N.1    Hummer, G.2
  • 19
    • 66849091890 scopus 로고    scopus 로고
    • Reactive flux and folding pathways in network models of coarse-grained protein dynamics
    • Berezhkovskii A, Hummer G, Szabo A, (2009) Reactive flux and folding pathways in network models of coarse-grained protein dynamics. J Chem Phys 130: 205102.
    • (2009) J Chem Phys , vol.130 , pp. 205102
    • Berezhkovskii, A.1    Hummer, G.2    Szabo, A.3
  • 20
    • 39749156392 scopus 로고    scopus 로고
    • Kinetic analysis of molecular dynamics simulations reveals changes in the denatured state and switch of folding pathways upon single-point mutation of a β-sheet miniprotein
    • Muff S, Caflisch A, (2008) Kinetic analysis of molecular dynamics simulations reveals changes in the denatured state and switch of folding pathways upon single-point mutation of a β-sheet miniprotein. Proteins: Structure, Function, and Bioinformatics 70: 1185-1195.
    • (2008) Proteins: Structure, Function, and Bioinformatics , vol.70 , pp. 1185-1195
    • Muff, S.1    Caflisch, A.2
  • 21
    • 49149121255 scopus 로고    scopus 로고
    • One-dimensional barrier preserving free-energy projections of a beta-sheet miniprotein: New insights into the folding process
    • Krivov SV, Muff S, Caflisch A, Karplus M, (2008) One-dimensional barrier preserving free-energy projections of a beta-sheet miniprotein: New insights into the folding process. J Phys Chem B 112: 8701-8714.
    • (2008) J Phys Chem B , vol.112 , pp. 8701-8714
    • Krivov, S.V.1    Muff, S.2    Caflisch, A.3    Karplus, M.4
  • 22
    • 63649158574 scopus 로고    scopus 로고
    • Identification of the protein folding transition state from molecular dynamics trajectories
    • Muff S, Caflisch A, (2009) Identification of the protein folding transition state from molecular dynamics trajectories. J Chem Phys 130: 125104.
    • (2009) J Chem Phys , vol.130 , pp. 125104
    • Muff, S.1    Caflisch, A.2
  • 24
    • 65249101769 scopus 로고    scopus 로고
    • Bulky side chains and non-native salt bridges slow down the folding of a cross-linked helical peptide: a combined molecular dynamics and time-resolved infrared spectroscopy study
    • Paoli B, Seeber M, Backus EHG, Ihalainen JA, Hamm P, et al. (2009) Bulky side chains and non-native salt bridges slow down the folding of a cross-linked helical peptide: a combined molecular dynamics and time-resolved infrared spectroscopy study. J Phys Chem B 113: 4435-42.
    • (2009) J Phys Chem B , vol.113 , pp. 4435-4442
    • Paoli, B.1    Seeber, M.2    Backus, E.H.G.3    Ihalainen, J.A.4    Hamm, P.5
  • 25
    • 77149131234 scopus 로고    scopus 로고
    • Slow Folding of Cross-Linked alpha-Helical Peptides Due to Steric Hindrance
    • Paoli B, Pellarin R, Caflisch A, (2010) Slow Folding of Cross-Linked alpha-Helical Peptides Due to Steric Hindrance. J Phys Chem B 114: 2023-7.
    • (2010) J Phys Chem B , vol.114 , pp. 2023-2027
    • Paoli, B.1    Pellarin, R.2    Caflisch, A.3
  • 27
    • 70350022355 scopus 로고    scopus 로고
    • How does a simplified-sequence protein fold?
    • Guarnera E, Pellarin R, Caflisch A, (2009) How does a simplified-sequence protein fold? Biophys J 97: 1737-46.
    • (2009) Biophys J , vol.97 , pp. 1737-1746
    • Guarnera, E.1    Pellarin, R.2    Caflisch, A.3
  • 28
    • 77954635393 scopus 로고    scopus 로고
    • Protein folded states are kinetic hubs
    • Bowman GR, Pande VS, (2010) Protein folded states are kinetic hubs. Proc Natl Acad Sci U S A 107: 10890-5.
    • (2010) Proc Natl Acad Sci U S A , vol.107 , pp. 10890-10895
    • Bowman, G.R.1    Pande, V.S.2
  • 30
    • 0034723142 scopus 로고    scopus 로고
    • X-ray structures of small ligand-FKBP complexes provide an estimate for hydrophobic interaction energies
    • Burkhard P, Taylor P, Walkinshaw MD, (2000) X-ray structures of small ligand-FKBP complexes provide an estimate for hydrophobic interaction energies. J Mol Biol 295: 953-962.
    • (2000) J Mol Biol , vol.295 , pp. 953-962
    • Burkhard, P.1    Taylor, P.2    Walkinshaw, M.D.3
  • 34
    • 76249087938 scopus 로고    scopus 로고
    • CHARMM general force field: A force field for drug-like molecules compatible with the CHARMM all-atom additive biological force fields
    • Vanommeslaeghe K, Hatcher E, Acharya C, Kundu S, Zhong S, et al. (2010) CHARMM general force field: A force field for drug-like molecules compatible with the CHARMM all-atom additive biological force fields. J Comput Chem 31: 671-690.
    • (2010) J Comput Chem , vol.31 , pp. 671-690
    • Vanommeslaeghe, K.1    Hatcher, E.2    Acharya, C.3    Kundu, S.4    Zhong, S.5
  • 35
    • 33846823909 scopus 로고
    • Particle mesh Ewald: an Nlog(N) method for Ewald sums in large systems
    • Darden T, York D, Pedersen LG, (1993) Particle mesh Ewald: an Nlog(N) method for Ewald sums in large systems. J Chem Phys 98: 10089.
    • (1993) J Chem Phys , vol.98 , pp. 10089
    • Darden, T.1    York, D.2    Pedersen, L.G.3
  • 36
    • 36449007836 scopus 로고
    • Constant pressure molecular dynamics simulation: the Langevin piston method
    • Feller S, Zhang Y, Pastor R, Brooks B, (1995) Constant pressure molecular dynamics simulation: the Langevin piston method. J Chem Phys 103: 4613.
    • (1995) J Chem Phys , vol.103 , pp. 4613
    • Feller, S.1    Zhang, Y.2    Pastor, R.3    Brooks, B.4
  • 38
    • 35748935079 scopus 로고    scopus 로고
    • Wordom: a program for efficient analysis of molecular dynamics simulations
    • Seeber M, Cecchini M, Rao F, Settanni G, Caflisch A, (2007) Wordom: a program for efficient analysis of molecular dynamics simulations 23: 2625-2627.
    • (2007) , vol.23 , pp. 2625-2627
    • Seeber, M.1    Cecchini, M.2    Rao, F.3    Settanni, G.4    Caflisch, A.5
  • 40
    • 52949137003 scopus 로고    scopus 로고
    • Diffusive reaction dynamics on invariant free energy profiles
    • Krivov SV, Karplus M, (2008) Diffusive reaction dynamics on invariant free energy profiles. Proc Natl Acad Sci USA 105: 13841-13846.
    • (2008) Proc Natl Acad Sci USA , vol.105 , pp. 13841-13846
    • Krivov, S.V.1    Karplus, M.2
  • 43
    • 34548098593 scopus 로고    scopus 로고
    • Estimation of protein folding probability from equilibrium simulations
    • Rao F, Settanni G, Guarnera E, Caflisch A, (2005) Estimation of protein folding probability from equilibrium simulations. J Chem Phys 122: 184901.
    • (2005) J Chem Phys , vol.122 , pp. 184901
    • Rao, F.1    Settanni, G.2    Guarnera, E.3    Caflisch, A.4
  • 44
    • 0026193384 scopus 로고
    • Protein hydration studied with homonuclear 3D 1H NMR experiments
    • Otting G, Liepinsh E 2nd, Farmer BT, Wuthrich K, (1991) Protein hydration studied with homonuclear 3D 1H NMR experiments. J Biomol NMR 1: 209-215.
    • (1991) J Biomol NMR , vol.1 , pp. 209-215
    • Otting, G.1    Liepinsh 2nd, E.2    Farmer, B.T.3    Wuthrich, K.4
  • 46
    • 0028242139 scopus 로고
    • Solution structure and dynamics of PEC-60, a protein of the Kazal type inhibitor family, determined by nuclear magnetic resonance spectroscopy
    • Liepinsh E, Berndt KD, Sillard R, Mutt V, Otting G, (1994) Solution structure and dynamics of PEC-60, a protein of the Kazal type inhibitor family, determined by nuclear magnetic resonance spectroscopy. J Mol Biol 239: 137-153.
    • (1994) J Mol Biol , vol.239 , pp. 137-153
    • Liepinsh, E.1    Berndt, K.D.2    Sillard, R.3    Mutt, V.4    Otting, G.5
  • 47
    • 0029028428 scopus 로고
    • Interaction of urea with an unfolded protein. The DNA-binding domain of the 434-repressor
    • Dotsch V, Wider G, Siegal G, Wuthrich K, (1995) Interaction of urea with an unfolded protein. The DNA-binding domain of the 434-repressor. FEBS Lett 366: 6-10.
    • (1995) FEBS Lett , vol.366 , pp. 6-10
    • Dotsch, V.1    Wider, G.2    Siegal, G.3    Wuthrich, K.4
  • 48
    • 0347359115 scopus 로고    scopus 로고
    • A Biacore biosensor method for detailed kinetic binding analysis of small molecule inhibitors of p38alpha mitogen-activated protein kinase
    • Casper D, Bukhtiyarova M, Springman EB, (2004) A Biacore biosensor method for detailed kinetic binding analysis of small molecule inhibitors of p38alpha mitogen-activated protein kinase. Anal Biochem 325: 126-136.
    • (2004) Anal Biochem , vol.325 , pp. 126-136
    • Casper, D.1    Bukhtiyarova, M.2    Springman, E.B.3
  • 49
    • 0030039913 scopus 로고    scopus 로고
    • Competition BIAcore for measuring true affinities: large differences from values determined from binding kinetics
    • Nieba L, Krebber A, Pluckthun A, (1996) Competition BIAcore for measuring true affinities: large differences from values determined from binding kinetics. Anal Biochem 234: 155-165.
    • (1996) Anal Biochem , vol.234 , pp. 155-165
    • Nieba, L.1    Krebber, A.2    Pluckthun, A.3
  • 50
    • 0031637651 scopus 로고    scopus 로고
    • Ligand binding affinity prediction by linear interaction energy methods
    • Hansson T, Marelius J, Åqvist J, (1998) Ligand binding affinity prediction by linear interaction energy methods. J Comput-Aided Mol Design 12: 27-35.
    • (1998) J Comput-Aided Mol Design , vol.12 , pp. 27-35
    • Hansson, T.1    Marelius, J.2    Åqvist, J.3
  • 51
    • 0028155689 scopus 로고
    • A new method for predicting binding affinity in computer-aided drug design
    • Åqvist J, Medina C, Samuelsson JE, (1994) A new method for predicting binding affinity in computer-aided drug design. Protein Engineering 7: 385-391.
    • (1994) Protein Engineering , vol.7 , pp. 385-391
    • Åqvist, J.1    Medina, C.2    Samuelsson, J.E.3
  • 52
    • 0030906731 scopus 로고    scopus 로고
    • Binding affinities for sulfonamide inhibitors with human thrombin using monte carlo simulations with a linear response method
    • Jones-Hertzog DK, Jorgensen WH, (1996) Binding affinities for sulfonamide inhibitors with human thrombin using monte carlo simulations with a linear response method. J Med Chem 40: 1539-1549.
    • (1996) J Med Chem , vol.40 , pp. 1539-1549
    • Jones-Hertzog, D.K.1    Jorgensen, W.H.2
  • 53
    • 0021476470 scopus 로고
    • Calculations of electrostatic interactions in biological-systems and in solutions
    • Warshel A, Russell ST, (1984) Calculations of electrostatic interactions in biological-systems and in solutions. Q Rev Biophys 17: 283-422.
    • (1984) Q Rev Biophys , vol.17 , pp. 283-422
    • Warshel, A.1    Russell, S.T.2
  • 54
    • 0000763912 scopus 로고
    • Molecular basis for the Born model of ion solvation
    • Roux B, Yu HA, Karplus M, (1990) Molecular basis for the Born model of ion solvation. J Phys Chem 94: 4683-4688.
    • (1990) J Phys Chem , vol.94 , pp. 4683-4688
    • Roux, B.1    Yu, H.A.2    Karplus, M.3
  • 55
    • 47749108669 scopus 로고    scopus 로고
    • Is quantum mechanics necessary for predicting binding free energy?
    • Zhou T, Huang D, Caflisch A, (2008) Is quantum mechanics necessary for predicting binding free energy? J Med Chem 51: 4280-4288.
    • (2008) J Med Chem , vol.51 , pp. 4280-4288
    • Zhou, T.1    Huang, D.2    Caflisch, A.3
  • 56
    • 34547110591 scopus 로고    scopus 로고
    • Predicting absolute ligand binding free energies to a simple model site
    • Mobley D, Graves A, Chodera J, McReynolds A, Shoichet B, et al. (2007) Predicting absolute ligand binding free energies to a simple model site. J Mol Biol 371: 1118-1134.
    • (2007) J Mol Biol , vol.371 , pp. 1118-1134
    • Mobley, D.1    Graves, A.2    Chodera, J.3    McReynolds, A.4    Shoichet, B.5
  • 57
    • 70449522914 scopus 로고    scopus 로고
    • Predicting ligand binding affinity with alchemical free energy methods in a polar model binding site
    • Boyce SE, Mobley DL, Rocklin GJ, Graves AP, Dill KA, et al. (2009) Predicting ligand binding affinity with alchemical free energy methods in a polar model binding site. J Mol Biol 394: 747-63.
    • (2009) J Mol Biol , vol.394 , pp. 747-763
    • Boyce, S.E.1    Mobley, D.L.2    Rocklin, G.J.3    Graves, A.P.4    Dill, K.A.5
  • 58
    • 64049102289 scopus 로고    scopus 로고
    • Binding of Small-Molecule Ligands to Proteins
    • Mobley D, Dill K, (2009) Binding of Small-Molecule Ligands to Proteins. Structure 17: 489-498.
    • (2009) Structure , vol.17 , pp. 489-498
    • Mobley, D.1    Dill, K.2
  • 59
    • 33748374124 scopus 로고
    • Statistical mechanics of isomerization dynamics in liquids and the transition state approximation
    • Chandler D, (1978) Statistical mechanics of isomerization dynamics in liquids and the transition state approximation. J Chem Phys 68: 2959-2970.
    • (1978) J Chem Phys , vol.68 , pp. 2959-2970
    • Chandler, D.1
  • 61
    • 5244245983 scopus 로고
    • A correlation of reaction rates
    • Hammond GS, (1955) A correlation of reaction rates. J Am Chem Soc 77: 334-338.
    • (1955) J Am Chem Soc , vol.77 , pp. 334-338
    • Hammond, G.S.1
  • 64
    • 76149136021 scopus 로고    scopus 로고
    • Molecular Simulation of ab Initio Protein Folding for a Millisecond Folder NTL9 (1- 39)
    • Voelz V, Bowman G, Beauchamp K, Pande V, (2010) Molecular Simulation of ab Initio Protein Folding for a Millisecond Folder NTL9 (1- 39). J Am Chem Soc 132: 1526-1528.
    • (2010) J Am Chem Soc , vol.132 , pp. 1526-1528
    • Voelz, V.1    Bowman, G.2    Beauchamp, K.3    Pande, V.4
  • 65
    • 70350072332 scopus 로고    scopus 로고
    • Structure-based optimization of potent and selective inhibitors of the tyrosine kinase Ephb4
    • Lafleur K, Huang D, Zhou T, Caflisch A, Nevado C, (2009) Structure-based optimization of potent and selective inhibitors of the tyrosine kinase Ephb4. J Med Chem 52: 6433-46.
    • (2009) J Med Chem , vol.52 , pp. 6433-6446
    • Lafleur, K.1    Huang, D.2    Zhou, T.3    Caflisch, A.4    Nevado, C.5
  • 66
    • 0002404088 scopus 로고
    • On the orthogonal transformation used for structural comparisons
    • Kearsley SK, (1989) On the orthogonal transformation used for structural comparisons. Acta Crystallographica Section A 45: 208-210.
    • (1989) Acta Crystallographica Section A , vol.45 , pp. 208-210
    • Kearsley, S.K.1


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.