char = C;code = 67
char = i;code = 105
char = t;code = 116
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char = ;code = 32
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char = e;code = 101
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char = s;code = 115
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char = n;code = 110
char = g;code = 103
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char = b;code = 98
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char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
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char = C;code = 67
char = 4;code = 52
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char = t;code = 116
char = e;code = 101
char = /;code = 47
char = c;code = 99
char = i;code = 105
char = t;code = 116
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char = a;code = 97
char = t;code = 116
char = e;code = 101
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char = s;code = 115
char = e;code = 101
char = n;code = 110
char = s;code = 115
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = k;code = 107
char = i;code = 105
char = n;code = 110
char = a;code = 97
char = s;code = 115
char = e;code = 101
char = ;code = 32
char = D;code = 68
char = c;code = 99
char = u;code = 117
char = S;code = 83
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = E;code = 69
char = s;code = 115
char = c;code = 99
char = h;code = 104
char = e;code = 101
char = r;code = 114
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char = c;code = 99
char = h;code = 104
char = i;code = 105
char = a;code = 97
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = l;code = 108
char = i;code = 105
char = :;code = 58
char = ;code = 32
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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 = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = n;code = 110
char = v;code = 118
char = e;code = 101
char = r;code = 114
char = s;code = 115
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = D;code = 68
char = c;code = 99
char = u;code = 117
char = S;code = 83
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = a;code = 97
char = ;code = 32
char = C;code = 67
char = 4;code = 52
char = -;code = 45
char = d;code = 100
char = i;code = 105
char = c;code = 99
char = a;code = 97
char = r;code = 114
char = b;code = 98
char = o;code = 111
char = x;code = 120
char = y;code = 121
char = l;code = 108
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = -;code = 45
char = ;code = 32
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = c;code = 99
char = i;code = 105
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = -;code = 45
char = s;code = 115
char = p;code = 112
char = e;code = 101
char = c;code = 99
char = i;code = 105
char = f;code = 102
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = s;code = 115
char = e;code = 101
char = n;code = 110
char = s;code = 115
char = o;code = 111
char = r;code = 114
char = .;code = 46
result sql = Citrate sensing by the C4-dicarboxylate/citrate sensor kinase DcuS of Escherichia coli: binding site and conversion of DcuS to a C4-dicarboxylate- or citrate-specific sensor.
Citrate sensing by the C4-dicarboxylate/citrate sensor kinase DcuS of Escherichia coli: binding site and conversion of DcuS to a C4-dicarboxylate- or citrate-specific sensor.
char = T;code = 84
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = h;code = 104
char = i;code = 105
char = s;code = 115
char = t;code = 116
char = i;code = 105
char = d;code = 100
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = t;code = 116
char = e;code = 101
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = k;code = 107
char = i;code = 105
char = n;code = 110
char = a;code = 97
char = s;code = 115
char = e;code = 101
char = ;code = 32
char = D;code = 68
char = c;code = 99
char = u;code = 117
char = S;code = 83
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = E;code = 69
char = s;code = 115
char = c;code = 99
char = h;code = 104
char = e;code = 101
char = r;code = 114
char = i;code = 105
char = c;code = 99
char = h;code = 104
char = i;code = 105
char = a;code = 97
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = l;code = 108
char = i;code = 105
char = ;code = 32
char = s;code = 115
char = e;code = 101
char = n;code = 110
char = s;code = 115
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = C;code = 67
char = (;code = 40
char = 4;code = 52
char = );code = 41
char = -;code = 45
char = d;code = 100
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char = c;code = 99
char = a;code = 97
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char = y;code = 121
char = l;code = 108
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char = t;code = 116
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = a;code = 97
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char = d;code = 100
char = ;code = 32
char = c;code = 99
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char = t;code = 116
char = r;code = 114
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = ;code = 32
char = b;code = 98
char = y;code = 121
char = ;code = 32
char = a;code = 97
char = ;code = 32
char = p;code = 112
char = e;code = 101
char = r;code = 114
char = i;code = 105
char = p;code = 112
char = l;code = 108
char = a;code = 97
char = s;code = 115
char = m;code = 109
char = i;code = 105
char = c;code = 99
char = ;code = 32
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 = 46
char = ;code = 32
char = T;code = 84
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = c;code = 99
char = l;code = 108
char = o;code = 111
char = s;code = 115
char = e;code = 101
char = l;code = 108
char = y;code = 121
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = l;code = 108
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = s;code = 115
char = e;code = 101
char = n;code = 110
char = s;code = 115
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = k;code = 107
char = i;code = 105
char = n;code = 110
char = a;code = 97
char = s;code = 115
char = e;code = 101
char = ;code = 32
char = C;code = 67
char = i;code = 105
char = t;code = 116
char = A;code = 65
char = ;code = 32
char = b;code = 98
char = i;code = 105
char = n;code = 110
char = d;code = 100
char = s;code = 115
char = ;code = 32
char = c;code = 99
char = i;code = 105
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = ,;code = 44
char = ;code = 32
char = b;code = 98
char = u;code = 117
char = t;code = 116
char = ;code = 32
char = n;code = 110
char = o;code = 111
char = ;code = 32
char = C;code = 67
char = (;code = 40
char = 4;code = 52
char = );code = 41
char = -;code = 45
char = d;code = 100
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char = c;code = 99
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char = o;code = 111
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char = y;code = 121
char = l;code = 108
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = s;code = 115
char = ,;code = 44
char = ;code = 32
char = b;code = 98
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char = ;code = 32
char = a;code = 97
char = ;code = 32
char = h;code = 104
char = o;code = 111
char = m;code = 109
char = o;code = 111
char = l;code = 108
char = o;code = 111
char = g;code = 103
char = o;code = 111
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char = ;code = 32
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char = e;code = 101
char = r;code = 114
char = i;code = 105
char = p;code = 112
char = l;code = 108
char = a;code = 97
char = s;code = 115
char = m;code = 109
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = d;code = 100
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char = m;code = 109
char = a;code = 97
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char = n;code = 110
char = .;code = 46
char = ;code = 32
char = C;code = 67
char = i;code = 105
char = t;code = 116
char = A;code = 65
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char = k;code = 107
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char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = b;code = 98
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char = h;code = 104
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char = t;code = 116
char = h;code = 104
char = r;code = 114
char = e;code = 101
char = e;code = 101
char = ;code = 32
char = c;code = 99
char = a;code = 97
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char = b;code = 98
char = o;code = 111
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char = a;code = 97
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char = e;code = 101
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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
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char = h;code = 104
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char = r;code = 114
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char = x;code = 120
char = y;code = 121
char = l;code = 108
char = ;code = 32
char = g;code = 103
char = r;code = 114
char = o;code = 111
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char = p;code = 112
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char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = c;code = 99
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char = t;code = 116
char = r;code = 114
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = ;code = 32
char = b;code = 98
char = y;code = 121
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 = C;code = 67
char = 1;code = 49
char = ,;code = 44
char = ;code = 32
char = C;code = 67
char = 2;code = 50
char = ,;code = 44
char = ;code = 32
char = C;code = 67
char = 3;code = 51
char = ,;code = 44
char = ;code = 32
char = a;code = 97
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char = d;code = 100
char = ;code = 32
char = H;code = 72
char = .;code = 46
char = ;code = 32
char = D;code = 68
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char = S;code = 83
char = ;code = 32
char = r;code = 114
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char = q;code = 113
char = u;code = 117
char = i;code = 105
char = r;code = 114
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char = ;code = 32
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char = h;code = 104
char = e;code = 101
char = ;code = 32
char = s;code = 115
char = a;code = 97
char = m;code = 109
char = e;code = 101
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 = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = C;code = 67
char = (;code = 40
char = 4;code = 52
char = );code = 41
char = -;code = 45
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char = c;code = 99
char = a;code = 97
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char = b;code = 98
char = o;code = 111
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char = y;code = 121
char = l;code = 108
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = ;code = 32
char = s;code = 115
char = e;code = 101
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char = s;code = 115
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ,;code = 44
char = ;code = 32
char = b;code = 98
char = u;code = 117
char = t;code = 116
char = ;code = 32
char = o;code = 111
char = n;code = 110
char = l;code = 108
char = y;code = 121
char = ;code = 32
char = C;code = 67
char = 2;code = 50
char = ;code = 32
char = a;code = 97
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char = d;code = 100
char = ;code = 32
char = C;code = 67
char = 3;code = 51
char = ;code = 32
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char = h;code = 104
char = i;code = 105
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char = l;code = 108
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char = c;code = 99
char = o;code = 111
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char = r;code = 114
char = v;code = 118
char = e;code = 101
char = d;code = 100
char = .;code = 46
char = ;code = 32
char = I;code = 73
char = t;code = 116
char = ;code = 32
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = s;code = 115
char = h;code = 104
char = o;code = 111
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char = ;code = 32
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char = g;code = 103
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char = o;code = 111
char = f;code = 102
char = ;code = 32
char = c;code = 99
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char = b;code = 98
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char = D;code = 68
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char = u;code = 117
char = S;code = 83
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char = r;code = 114
char = e;code = 101
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char = a;code = 97
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char = e;code = 101
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char = t;code = 116
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char = i;code = 105
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char = d;code = 100
char = i;code = 105
char = n;code = 110
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char = ;code = 32
char = o;code = 111
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char = C;code = 67
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char = );code = 41
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char = e;code = 101
char = d;code = 100
char = ;code = 32
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char = a;code = 97
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char = ;code = 32
char = (;code = 40
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char = m;code = 109
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char = a;code = 97
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result sql = The histidine protein kinase DcuS of Escherichia coli senses C(4)-dicarboxylates and citrate by a periplasmic domain. The closely related sensor kinase CitA binds citrate, but no C(4)-dicarboxylates, by a homologous periplasmic domain. CitA is known to bind the three carboxylate and the hydroxyl groups of citrate by sites C1, C2, C3, and H. DcuS requires the same sites for C(4)-dicarboxylate sensing, but only C2 and C3 are highly conserved. It is shown here that sensing of citrate by DcuS required the same sites. Binding of citrate to DcuS, therefore, was similar to binding of C(4)-dicarboxylates but different from that of citrate binding in CitA. DcuS could be converted to a C(4)-dicarboxylate-specific sensor (DcuS(DC)) by mutating residues of sites C1 and C3 or of some DcuS-subtype specific residues. Mutations around site C1 aimed at increasing the size and accessibility of the site converted DcuS to a citrate-specific sensor (DcuS(Cit)). DcuS(DC) and DcuS(Cit) had complementary effector specificities and responded either to C(4)-dicarboxylates or to citrate and mesaconate. The results imply that DcuS binds citrate (similar to the C(4)-dicarboxylates) via the C(4)-dicarboxylate part of the molecule. Sites C2 and C3 are essential for binding of two carboxylic groups of citrate or of C(4)-dicarboxylates; sites C1 and H are required for other essential purposes.

Publication: J. Bacteriol. 2007 Jun ;189(11)::4290-8.
Publication Date: 2007 Jun
Study Author(s): Krämer, J;Fischer, J D;Zientz, E;Vijayan, V;Griesinger, C;Lupas, A;Unden, G;
Institution: Institut für Mikrobiologie und Weinforschung, Johannes Gutenberg-Universität Mainz, Becherweg 15, 55099 Mainz, Germany.
Shortcut link to this study:
The histidine protein kinase DcuS of Escherichia coli senses C(4)-dicarboxylates and citrate by a periplasmic domain. The closely related sensor kinase CitA binds citrate, but no C(4)-dicarboxylates, by a homologous periplasmic domain. CitA is known to bind the three carboxylate and the hydroxyl groups of citrate by sites C1, C2, C3, and H. DcuS requires the same sites for C(4)-dicarboxylate sensing, but only C2 and C3 are highly conserved. It is shown here that sensing of citrate by DcuS required the same sites. Binding of citrate to DcuS, therefore, was similar to binding of C(4)-dicarboxylates but different from that of citrate binding in CitA. DcuS could be converted to a C(4)-dicarboxylate-specific sensor (DcuS(DC)) by mutating residues of sites C1 and C3 or of some DcuS-subtype specific residues. Mutations around site C1 aimed at increasing the size and accessibility of the site converted DcuS to a citrate-specific sensor (DcuS(Cit)). DcuS(DC) and DcuS(Cit) had complementary effector specificities and responded either to C(4)-dicarboxylates or to citrate and mesaconate. The results imply that DcuS binds citrate (similar to the C(4)-dicarboxylates) via the C(4)-dicarboxylate part of the molecule. Sites C2 and C3 are essential for binding of two carboxylic groups of citrate or of C(4)-dicarboxylates; sites C1 and H are required for other essential purposes.
PMID: 17416661

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