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The investigation of the binding behavior between ethyl maltol and human serum albumin by multi-spectroscopic methods and molecular docking.char = T;code = 84 char = h;code = 104 char = i;code = 105 char = s;code = 115 char = ;code = 32 char = p;code = 112 char = a;code = 97 char = p;code = 112 char = e;code = 101 char = r;code = 114 char = ;code = 32 char = w;code = 119 char = a;code = 97 char = s;code = 115 char = ;code = 32 char = d;code = 100 char = e;code = 101 char = s;code = 115 char = i;code = 105 char = g;code = 103 char = n;code = 110 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = t;code = 116 char = o;code = 111 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = v;code = 118 char = e;code = 101 char = s;code = 115 char = t;code = 116 char = i;code = 105 char = g;code = 103 char = a;code = 97 char = t;code = 116 char = e;code = 101 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = i;code = 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= n;code = 110 char = d;code = 100 char = i;code = 105 char = n;code = 110 char = g;code = 103 char = ;code = 32 char = c;code = 99 char = o;code = 111 char = n;code = 110 char = s;code = 115 char = t;code = 116 char = a;code = 97 char = n;code = 110 char = t;code = 116 char = s;code = 115 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = e;code = 101 char = t;code = 116 char = h;code = 104 char = y;code = 121 char = l;code = 108 char = ;code = 32 char = m;code = 109 char = a;code = 97 char = l;code = 108 char = t;code = 116 char = o;code = 111 char = l;code = 108 char = -;code = 45 char = H;code = 72 char = S;code = 83 char = A;code = 65 char = ;code = 32 char = c;code = 99 char = o;code = 111 char = m;code = 109 char = p;code = 112 char = l;code = 108 char = e;code = 101 char = x;code = 120 char = e;code = 101 char = s;code = 115 char = ;code = 32 char = w;code = 119 char = e;code = 101 char = r;code = 114 char = e;code = 101 char = ;code = 32 char = o;code = 111 char = b;code = 98 char = s;code = 115 char = e;code = 101 char = r;code = 114 char = v;code = 118 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = t;code = 116 char = o;code = 111 char = ;code = 32 char = b;code = 98 char = e;code = 101 char = ;code = 32 char = 2;code = 50 char = .;code = 46 char = 5;code = 53 char = 9;code = 57 char = ,;code = 44 char = ;code = 32 char = 1;code = 49 char = .;code = 46 char = 8;code = 56 char = 8;code = 56 char = ,;code = 44 char = ;code = 32 char = 1;code = 49 char = .;code = 46 char = 5;code = 53 char = 4;code = 52 char = ,;code = 44 char = ;code = 32 char = 1;code = 49 char = .;code = 46 char = 1;code = 49 char = 3;code = 51 char = ×;code = 215 char = 1;code = 49 char = 0;code = 48 char = (;code = 40 char = 4;code = 52 char = );code = 41 char = M;code = 77 char = (;code = 40 char = -;code = 45 char = 1;code = 49 char = );code = 41 char = ;code = 32 char = a;code = 97 char = t;code = 116 char = ;code = 32 char = 2;code = 50 char = 8;code = 56 char = 9;code = 57 char = ,;code = 44 char = ;code = 32 char = 2;code = 50 char = 9;code = 57 char = 6;code = 54 char = ,;code = 44 char = ;code = 32 char = 3;code = 51 char = 0;code = 48 char = 3;code = 51 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = d;code = 100 char = ;code = 32 char = 3;code = 51 char = 1;code = 49 char = 0;code = 48 char = K;code = 75 char = ,;code = 44 char = ;code = 32 char = r;code = 114 char = e;code = 101 char = s;code = 115 char = p;code = 112 char = e;code = 101 char = c;code = 99 char = t;code = 116 char = i;code = 105 char = v;code = 118 char = e;code = 101 char = l;code = 108 char = y;code = 121 char = .;code = 46 char = ;code = 32 char = T;code = 84 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = r;code = 114 char = m;code = 109 char = o;code = 111 char = d;code = 100 char = y;code = 121 char = n;code = 110 char = a;code = 97 char = m;code = 109 char = i;code = 105 char = c;code = 99 char = ;code = 32 char = p;code = 112 char = a;code = 97 char = r;code = 114 char = a;code = 97 char = m;code = 109 char = e;code = 101 char = t;code = 116 char = e;code = 101 char = r;code = 114 char = s;code = 115 char = ,;code = 44 char = ;code = 32 char = ?;code = 63 char = H;code = 72 char = (;code = 40 char = 0;code = 48 char = );code = 41 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = d;code = 100 char = ;code = 32 char = ?;code = 63 char = S;code = 83 char = (;code = 40 char = 0;code = 48 char = );code = 41 char = ;code = 32 char = w;code = 119 char = e;code = 101 char = r;code = 114 char = e;code = 101 char = ;code = 32 char = c;code = 99 char = a;code = 97 char = l;code = 108 char = c;code = 99 char = u;code = 117 char = l;code = 108 char = a;code = 97 char = t;code = 116 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = t;code = 116 char = o;code = 111 char = ;code = 32 char = b;code = 98 char = e;code = 101 char = ;code = 32 char = -;code = 45 char = 2;code = 50 char = 8;code = 56 char = .;code = 46 char = 6;code = 54 char = 1;code = 49 char = k;code = 107 char = J;code = 74 char = m;code = 109 char = o;code = 111 char = l;code = 108 char = (;code = 40 char = -;code = 45 char = 1;code = 49 char = );code = 41 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = d;code = 100 char = ;code = 32 char = -;code = 45 char = 1;code = 49 char = 4;code = 52 char = .;code = 46 char = 5;code = 53 char = 9;code = 57 char = J;code = 74 char = m;code = 109 char = o;code = 111 char = l;code = 108 char = (;code = 40 char = -;code = 45 char = 1;code = 49 char = );code = 41 char = K;code = 75 char = (;code = 40 char = -;code = 45 char = 1;code = 49 char = );code = 41 char = .;code = 46 char = ;code = 32 char = E;code = 69 char = n;code = 110 char = e;code = 101 char = r;code = 114 char = g;code = 103 char = y;code = 121 char = ;code = 32 char = t;code = 116 char = r;code = 114 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char = a;code = 97 char = ;code = 32 char = F;code = 70 char = R;code = 82 char = E;code = 69 char = T;code = 84 char = ;code = 32 char = m;code = 109 char = e;code = 101 char = c;code = 99 char = h;code = 104 char = a;code = 97 char = n;code = 110 char = i;code = 105 char = s;code = 115 char = m;code = 109 char = ,;code = 44 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = d;code = 100 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = d;code = 100 char = o;code = 111 char = n;code = 110 char = o;code = 111 char = r;code = 114 char = -;code = 45 char = a;code = 97 char = c;code = 99 char = c;code = 99 char = e;code = 101 char = p;code = 112 char = t;code = 116 char = o;code = 111 char = r;code = 114 char = ;code = 32 char = d;code = 100 char = i;code = 105 char = s;code = 115 char = t;code = 116 char = a;code = 97 char = n;code = 110 char = c;code = 99 char = e;code = 101 char = ;code = 32 char = (;code = 40 char = 3;code = 51 char = .;code = 46 char = 0;code = 48 char = 4;code = 52 char = n;code = 110 char = m;code = 109 char = );code = 41 char = ;code = 32 char = h;code = 104 char = a;code = 97 char = d;code = 100 char = ;code = 32 char = b;code = 98 char = e;code = 101 char = e;code = 101 char = n;code = 110 char = ;code = 32 char = d;code = 100 char = e;code = 101 char = t;code = 116 char = e;code = 101 char = r;code = 114 char = m;code = 109 char = i;code = 105 char = n;code = 110 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = a;code = 97 char = c;code = 99 char = c;code = 99 char = o;code = 111 char = r;code = 114 char = d;code = 100 char = i;code = 105 char = n;code = 110 char = g;code = 103 char = ;code = 32 char = t;code = 116 char = o;code = 111 char = ;code = 32 char = F;code = 70 char = ö;code = 246 char = r;code = 114 char = s;code = 115 char = t;code = 116 char = e;code = 101 char = r;code = 114 char = ';code = 39 char = s;code = 115 char = ;code = 32 char = t;code 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= 121 char = l;code = 108 char = ;code = 32 char = m;code = 109 char = a;code = 97 char = l;code = 108 char = t;code = 116 char = o;code = 111 char = l;code = 108 char = ;code = 32 char = s;code = 115 char = i;code = 105 char = t;code = 116 char = u;code = 117 char = a;code = 97 char = t;code = 116 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = w;code = 119 char = i;code = 105 char = t;code = 116 char = h;code = 104 char = i;code = 105 char = n;code = 110 char = ;code = 32 char = s;code = 115 char = u;code = 117 char = b;code = 98 char = d;code = 100 char = o;code = 111 char = m;code = 109 char = a;code = 97 char = i;code = 105 char = n;code = 110 char = ;code = 32 char = I;code = 73 char = I;code = 73 char = A;code = 65 char = ;code = 32 char = (;code = 40 char = s;code = 115 char = i;code = 105 char = t;code = 116 char = e;code = 101 char = ;code = 32 char = I;code = 73 char = );code = 41 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = H;code = 72 char = S;code = 83 char = A;code = 65 char = .;code = 46 char = ;code = 32 char = F;code = 70 char = l;code = 108 char = u;code = 117 char = o;code = 111 char = r;code = 114 char = e;code = 101 char = s;code = 115 char = c;code = 99 char = e;code = 101 char = n;code = 110 char = c;code = 99 char = e;code = 101 char = ;code = 32 char = d;code = 100 char = i;code = 105 char = s;code = 115 char = p;code = 112 char = l;code = 108 char = a;code = 97 char = c;code = 99 char = e;code = 101 char = m;code = 109 char = e;code = 101 char = n;code = 110 char = t;code = 116 char = ;code = 32 char = e;code = 101 char = x;code = 120 char = p;code = 112 char = e;code = 101 char = r;code = 114 char = i;code = 105 char = m;code = 109 char = e;code = 101 char = n;code = 110 char = t;code = 116 char = s;code = 115 char = ;code = 32 char = a;code = 97 char = l;code = 108 char = s;code = 115 char = o;code = 111 char = ;code = 32 char = p;code = 112 char = r;code = 114 char = o;code = 111 char = v;code = 118 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = b;code = 98 char = i;code = 105 char = n;code = 110 char = d;code = 100 char = i;code = 105 char = n;code = 110 char = g;code = 103 char = ;code = 32 char = s;code = 115 char = i;code = 105 char = t;code = 116 char = e;code = 101 char = s;code = 115 char = ;code = 32 char = b;code = 98 char = e;code = 101 char = t;code = 116 char = w;code = 119 char = e;code = 101 char = e;code = 101 char = n;code = 110 char = ;code = 32 char = e;code = 101 char = t;code = 116 char = h;code = 104 char = y;code = 121 char = l;code = 108 char = ;code = 32 char = m;code = 109 char = a;code = 97 char = l;code = 108 char = t;code = 116 char = o;code = 111 char = l;code = 108 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = d;code = 100 char = ;code = 32 char = H;code = 72 char = S;code = 83 char = A;code = 65 char = .;code = 46 result sql = This paper was designed to investigate the interaction of ethyl maltol with human serum albumin (HSA) under physiological condition by fluorescence, synchronous fluorescence, three-dimensional fluorescence, Fourier transformation infrared spectra, and molecular docking method. Spectroscopic analysis of the emission quenching at different temperatures revealed that the quenching mechanism of HSA by ethyl maltol was static quenching mechanism. The binding constants of ethyl maltol-HSA complexes were observed to be 2.59, 1.88, 1.54, 1.13×10(4)M(-1) at 289, 296, 303 and 310K, respectively. The thermodynamic parameters, ?H(0) and ?S(0) were calculated to be -28.61kJmol(-1) and -14.59Jmol(-1)K(-1). Energy transfer from tryptophan to ethyl maltol occurred by a FRET mechanism, and the donor-acceptor distance (3.04nm) had been determined according to Förster's theory. Molecular docking studies revealed that ethyl maltol situated within subdomain IIA (site I) of HSA. Fluorescence displacement experiments also proved the binding sites between ethyl maltol and HSA.
Publication: 2012 May 24 ;96C:316-323.
Publication Date: 2012 May 24
Study Author(s): Yue, Yuanyuan;Liu, Jianming;Yao, Meihuan;Yao, Xiaojun;Fan, Jing;Ji, Hanxuan;
Institution: School of Chemistry and Environmental Science, Henan Key Laboratory for Environmental Pollution Control, Key Laboratory for Yellow River and Huai River Water Environmental and Pollution Control, Ministry of Education, Henan Normal University, Xinxiang, Henan 453007, PR China.
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This paper was designed to investigate the interaction of ethyl maltol with human serum albumin (HSA) under physiological condition by fluorescence, synchronous fluorescence, three-dimensional fluorescence, Fourier transformation infrared spectra, and molecular docking method. Spectroscopic analysis of the emission quenching at different temperatures revealed that the quenching mechanism of HSA by ethyl maltol was static quenching mechanism. The binding constants of ethyl maltol-HSA complexes were observed to be 2.59, 1.88, 1.54, 1.13×10(4)M(-1) at 289, 296, 303 and 310K, respectively. The thermodynamic parameters, ?H(0) and ?S(0) were calculated to be -28.61kJmol(-1) and -14.59Jmol(-1)K(-1). Energy transfer from tryptophan to ethyl maltol occurred by a FRET mechanism, and the donor-acceptor distance (3.04nm) had been determined according to Förster's theory. Molecular docking studies revealed that ethyl maltol situated within subdomain IIA (site I) of HSA. Fluorescence displacement experiments also proved the binding sites between ethyl maltol and HSA.
PMID: 22705675