0.016798 0.000000 0.000000 0.000000 0.016798 0.000000 0.000000 0.000000 0.005557 0.00000 0.00000 0.00000 Katz, B.A. Cass, R.T. http://mmcif.pdb.org/dictionaries/ascii/mmcif_pdbx.dic 16 90.00 90.00 90.00 59.530 59.530 179.960 C2 H4 O 44.053 ACETYL GROUP non-polymer C3 H7 N O2 89.093 y ALANINE L-peptide linking C6 H15 N4 O2 1 175.209 y ARGININE L-peptide linking C4 H8 N2 O3 132.118 y ASPARAGINE L-peptide linking C4 H7 N O4 133.103 y ASPARTIC ACID L-peptide linking C3 H7 N O2 S 121.158 y CYSTEINE L-peptide linking C5 H10 N2 O3 146.144 y GLUTAMINE L-peptide linking C5 H9 N O4 147.129 y GLUTAMIC ACID L-peptide linking C2 H5 N O2 75.067 y GLYCINE peptide linking C6 H10 N3 O2 1 156.162 y HISTIDINE L-peptide linking H2 O 18.015 WATER non-polymer C6 H13 N O2 131.173 y ISOLEUCINE L-peptide linking C6 H13 N O2 131.173 y LEUCINE L-peptide linking C6 H15 N2 O2 1 147.195 y LYSINE L-peptide linking H2 N 16.023 AMINO GROUP non-polymer C9 H11 N O2 165.189 y PHENYLALANINE L-peptide linking C5 H9 N O2 115.130 y PROLINE L-peptide linking C3 H7 N O3 105.093 y SERINE L-peptide linking C4 H9 N O3 119.119 y THREONINE L-peptide linking C11 H12 N2 O2 204.225 y TRYPTOPHAN L-peptide linking C9 H11 N O3 181.189 y TYROSINE L-peptide linking C5 H11 N O2 117.146 y VALINE L-peptide linking US J.Biol.Chem. JBCHA3 0071 0021-9258 272 13220 13228 10.1074/jbc.272.20.13220 9148939 In crystals of complexes of streptavidin with peptide ligands containing the HPQ sequence the pKa of the peptide histidine is less than 3.0. 1997 US J.Am.Chem.Soc. JACSAT 0004 0002-7863 118 7914 Structure-Based Design Tools: Structural and Thermodynamic Comparison with Biotin of a Small Molecule that Binds Streptavidin with Micromolar Affinity 1996 US J.Am.Chem.Soc. JACSAT 0004 0002-7863 118 2535 Preparation of a Protein-Dimerizing Ligand by Topochemistry and Structure-Based Design 1996 US J.Biol.Chem. JBCHA3 0071 0021-9258 270 31210 Topochemical Catalysis Achieved by Structure-Based Ligand Design 1995 UK Chem.Biol. CBOLE2 2050 1074-5521 2 591 Topochemistry for Preparing Ligands that Dimerize Receptors 1995 US Biochemistry BICHAW 0033 0006-2960 34 15421 Binding to Protein Targets of Peptidic Leads Discovered by Phage Display: Crystal Structures of Streptavidin-Bound Linear and Cyclic Peptide Ligands Containing the Hpq Sequence 1995 US J.Am.Chem.Soc. JACSAT 0004 0002-7863 117 8541 Structure-Based Design of High Affinity Streptavidin Binding Cyclic Peptide Ligands Containing Thioether Cross-Links 1995 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 0.00000 0.00000 0.00000 293 1 AREA DETECTOR SIEMENS-NICOLET X100 M x-ray 1 1.5418 1.0 1.5418 12965.025 STREPTAVIDIN 1 man polymer 863.018 PEPTIDE LIGAND CONTAINING HPQ 1 man polymer 18.015 water 76 nat water no no AEAGITGTWYNQLGSTFIVTAGADGALTGTYESAVGNAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNYRNAHSATTW SGQYVGGAEARINTQWLLTSGTTEANAWKSTLVGHDTFTKVKP AEAGITGTWYNQLGSTFIVTAGADGALTGTYESAVGNAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNYRNAHSATTW SGQYVGGAEARINTQWLLTSGTTEANAWKSTLVGHDTFTKVKP B polypeptide(L) no yes (ACE)CHPQGPPC(NH2) XCHPQGPPCX P polypeptide(L) n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n Streptomyces sample 1895 Streptomyces avidinii 1 2.88 34.5 3.67 SYNTHETIC MOTHER LIQUOR = 75 % SATURATED AMMONIUM SULFATE, 25 % 1.0 M POTASSIUM ACETATE ADJUSTED TO PH 3.67. repository Initial release Version format compliance Derived calculations Version format compliance Atomic model 1 0 1998-03-18 1 1 2008-03-24 1 2 2011-07-13 1 3 2011-11-16 Y 1997-03-03 REL REL HOH water HOH 143 3 HOH HOH 143 B HOH 144 3 HOH HOH 144 B HOH 147 3 HOH HOH 147 B HOH 151 3 HOH HOH 151 B HOH 161 3 HOH HOH 161 B HOH 163 3 HOH HOH 163 B HOH 165 3 HOH HOH 165 B HOH 169 3 HOH HOH 169 B HOH 173 3 HOH HOH 173 B HOH 175 3 HOH HOH 175 B HOH 182 3 HOH HOH 182 B HOH 191 3 HOH HOH 191 B HOH 192 3 HOH HOH 192 B HOH 193 3 HOH HOH 193 B HOH 205 3 HOH HOH 205 B HOH 212 3 HOH HOH 212 B HOH 221 3 HOH HOH 221 B HOH 224 3 HOH HOH 224 B HOH 228 3 HOH HOH 228 B HOH 231 3 HOH HOH 231 B HOH 233 3 HOH HOH 233 B HOH 234 3 HOH HOH 234 B HOH 244 3 HOH HOH 244 B HOH 246 3 HOH HOH 246 B HOH 250 3 HOH HOH 250 B HOH 251 3 HOH HOH 251 B HOH 252 3 HOH HOH 252 B HOH 253 3 HOH HOH 253 B HOH 255 3 HOH HOH 255 B HOH 263 3 HOH HOH 263 B HOH 264 3 HOH HOH 264 B HOH 269 3 HOH HOH 269 B HOH 274 3 HOH HOH 274 B HOH 278 3 HOH HOH 278 B HOH 279 3 HOH HOH 279 B HOH 283 3 HOH HOH 283 B HOH 293 3 HOH HOH 293 B HOH 302 3 HOH HOH 302 B HOH 305 3 HOH HOH 305 B HOH 308 3 HOH HOH 308 B HOH 313 3 HOH HOH 313 B HOH 319 3 HOH HOH 319 B HOH 340 3 HOH HOH 340 B HOH 341 3 HOH HOH 341 B HOH 358 3 HOH HOH 358 B HOH 359 3 HOH HOH 359 B HOH 371 3 HOH HOH 371 B HOH 380 3 HOH HOH 380 B HOH 383 3 HOH HOH 383 B HOH 384 3 HOH HOH 384 B HOH 400 3 HOH HOH 400 B HOH 416 3 HOH HOH 416 B HOH 427 3 HOH HOH 427 B HOH 429 3 HOH HOH 429 B HOH 438 3 HOH HOH 438 B HOH 446 3 HOH HOH 446 B HOH 447 3 HOH HOH 447 B HOH 472 3 HOH HOH 472 B HOH 494 3 HOH HOH 494 B HOH 495 3 HOH HOH 495 B HOH 497 3 HOH HOH 497 B HOH 498 3 HOH HOH 498 B HOH 500 3 HOH HOH 500 B HOH 512 3 HOH HOH 512 B HOH 522 3 HOH HOH 522 B HOH 528 3 HOH HOH 528 B HOH 537 3 HOH HOH 537 B HOH 538 3 HOH HOH 538 B HOH 544 3 HOH HOH 544 B HOH 550 3 HOH HOH 550 B HOH 564 3 HOH HOH 564 B HOH 569 3 HOH HOH 569 B HOH 573 3 HOH HOH 573 B HOH 590 3 HOH HOH 590 B HOH 604 3 HOH HOH 604 B HOH 432 3 HOH HOH 432 P ALA 13 n 1 ALA 13 B GLU 14 n 2 GLU 14 B ALA 15 n 3 ALA 15 B GLY 16 n 4 GLY 16 B ILE 17 n 5 ILE 17 B THR 18 n 6 THR 18 B GLY 19 n 7 GLY 19 B THR 20 n 8 THR 20 B TRP 21 n 9 TRP 21 B TYR 22 n 10 TYR 22 B ASN 23 n 11 ASN 23 B GLN 24 n 12 GLN 24 B LEU 25 n 13 LEU 25 B GLY 26 n 14 GLY 26 B SER 27 n 15 SER 27 B THR 28 n 16 THR 28 B PHE 29 n 17 PHE 29 B ILE 30 n 18 ILE 30 B VAL 31 n 19 VAL 31 B THR 32 n 20 THR 32 B ALA 33 n 21 ALA 33 B GLY 34 n 22 GLY 34 B ALA 35 n 23 ALA 35 B ASP 36 n 24 ASP 36 B GLY 37 n 25 GLY 37 B ALA 38 n 26 ALA 38 B LEU 39 n 27 LEU 39 B THR 40 n 28 THR 40 B GLY 41 n 29 GLY 41 B THR 42 n 30 THR 42 B TYR 43 n 31 TYR 43 B GLU 44 n 32 GLU 44 B SER 45 n 33 SER 45 B ALA 46 n 34 ALA 46 B VAL 47 n 35 VAL 47 B GLY 48 n 36 GLY 48 B ASN 49 n 37 ASN 49 B ALA 50 n 38 ALA 50 B GLU 51 n 39 GLU 51 B SER 52 n 40 SER 52 B ARG 53 n 41 ARG 53 B TYR 54 n 42 TYR 54 B VAL 55 n 43 VAL 55 B LEU 56 n 44 LEU 56 B THR 57 n 45 THR 57 B GLY 58 n 46 GLY 58 B ARG 59 n 47 ARG 59 B TYR 60 n 48 TYR 60 B ASP 61 n 49 ASP 61 B SER 62 n 50 SER 62 B ALA 63 n 51 ALA 63 B PRO 64 n 52 PRO 64 B ALA 65 n 53 ALA 65 B THR 66 n 54 THR 66 B ASP 67 n 55 ASP 67 B GLY 68 n 56 GLY 68 B SER 69 n 57 SER 69 B GLY 70 n 58 GLY 70 B THR 71 n 59 THR 71 B ALA 72 n 60 ALA 72 B LEU 73 n 61 LEU 73 B GLY 74 n 62 GLY 74 B TRP 75 n 63 TRP 75 B THR 76 n 64 THR 76 B VAL 77 n 65 VAL 77 B ALA 78 n 66 ALA 78 B TRP 79 n 67 TRP 79 B LYS 80 n 68 LYS 80 B ASN 81 n 69 ASN 81 B ASN 82 n 70 ASN 82 B TYR 83 n 71 TYR 83 B ARG 84 n 72 ARG 84 B ASN 85 n 73 ASN 85 B ALA 86 n 74 ALA 86 B HIS 87 n 75 HIS 87 B SER 88 n 76 SER 88 B ALA 89 n 77 ALA 89 B THR 90 n 78 THR 90 B THR 91 n 79 THR 91 B TRP 92 n 80 TRP 92 B SER 93 n 81 SER 93 B GLY 94 n 82 GLY 94 B GLN 95 n 83 GLN 95 B TYR 96 n 84 TYR 96 B VAL 97 n 85 VAL 97 B GLY 98 n 86 GLY 98 B GLY 99 n 87 GLY 99 B ALA 100 n 88 ALA 100 B GLU 101 n 89 GLU 101 B ALA 102 n 90 ALA 102 B ARG 103 n 91 ARG 103 B ILE 104 n 92 ILE 104 B ASN 105 n 93 ASN 105 B THR 106 n 94 THR 106 B GLN 107 n 95 GLN 107 B TRP 108 n 96 TRP 108 B LEU 109 n 97 LEU 109 B LEU 110 n 98 LEU 110 B THR 111 n 99 THR 111 B SER 112 n 100 SER 112 B GLY 113 n 101 GLY 113 B THR 114 n 102 THR 114 B THR 115 n 103 THR 115 B GLU 116 n 104 GLU 116 B ALA 117 n 105 ALA 117 B ASN 118 n 106 ASN 118 B ALA 119 n 107 ALA 119 B TRP 120 n 108 TRP 120 B LYS 121 n 109 LYS 121 B SER 122 n 110 SER 122 B THR 123 n 111 THR 123 B LEU 124 n 112 LEU 124 B VAL 125 n 113 VAL 125 B GLY 126 n 114 GLY 126 B HIS 127 n 115 HIS 127 B ASP 128 n 116 ASP 128 B THR 129 n 117 THR 129 B PHE 130 n 118 PHE 130 B THR 131 n 119 THR 131 B LYS 132 n 120 LYS 132 B VAL 133 n 121 VAL 133 B n 122 134 B n 123 135 B ACE 0 n 1 ACE 0 P CYS 1 n 2 CYS 1 P HIS 2 n 3 HIS 2 P PRO 3 n 4 PRO 3 P GLN 4 n 5 GLN 4 P GLY 5 n 6 GLY 5 P PRO 6 n 7 PRO 6 P PRO 7 n 8 PRO 7 P CYS 8 n 9 CYS 8 P NH2 9 n 10 NH2 9 P author_and_software_defined_assembly PISA,PQS 8 octameric 14190 -76 20530 1.0000000000 0.0000000000 0.0000000000 0.0000000000 1.0000000000 0.0000000000 0.0000000000 0.0000000000 1.0000000000 1_555 x,y,z identity operation 0.0000000000 0.0000000000 0.0000000000 0.0000000000 -1.0000000000 0.0000000000 -1.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000 -1.0000000000 8_555 -y,-x,-z crystal symmetry operation 0.0000000000 0.0000000000 0.0000000000 -1.0000000000 0.0000000000 0.0000000000 0.0000000000 -1.0000000000 0.0000000000 0.0000000000 0.0000000000 1.0000000000 10_555 -x,-y,z crystal symmetry operation 0.0000000000 0.0000000000 0.0000000000 0.0000000000 1.0000000000 0.0000000000 1.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000 -1.0000000000 15_555 y,x,-z crystal symmetry operation 0.0000000000 0.0000000000 0.0000000000 B O GLY 19 A O GLY 7 B N VAL 31 A N VAL 19 B O THR 28 A O THR 16 B N GLU 44 A N GLU 32 B O LEU 39 A O LEU 27 B N GLY 58 A N GLY 46 B O THR 57 A O THR 45 B N THR 76 A N THR 64 B O THR 71 A O THR 59 B N TYR 96 A N TYR 84 B O ALA 89 A O ALA 77 B N THR 111 A N THR 99 B O ILE 104 A O ILE 92 B N PHE 130 A N PHE 118 1 B HOH 544 C HOH 1 B N SER 62 B A N SER 50 0 Y 1 B CA SER 62 B A CA SER 50 0 Y 1 B C SER 62 B A C SER 50 0 Y 1 B O SER 62 B A O SER 50 0 Y 1 B CB SER 62 B A CB SER 50 0 Y 1 B OG SER 62 B A OG SER 50 0 Y 1 B N PRO 64 B A N PRO 52 0 Y 1 B CA PRO 64 B A CA PRO 52 0 Y 1 B C PRO 64 B A C PRO 52 0 Y 1 B O PRO 64 B A O PRO 52 0 Y 1 B CB PRO 64 B A CB PRO 52 0 Y 1 B CG PRO 64 B A CG PRO 52 0 Y 1 B CD PRO 64 B A CD PRO 52 0 Y 1 B N ALA 65 B A N ALA 53 0 Y 1 B CA ALA 65 B A CA ALA 53 0 Y 1 B C ALA 65 B A C ALA 53 0 Y 1 B O ALA 65 B A O ALA 53 0 Y 1 B CB ALA 65 B A CB ALA 53 0 Y 1 B N THR 66 B A N THR 54 0 Y 1 B CA THR 66 B A CA THR 54 0 Y 1 B C THR 66 B A C THR 54 0 Y 1 B O THR 66 B A O THR 54 0 Y 1 B CB THR 66 B A CB THR 54 0 Y 1 B OG1 THR 66 B A OG1 THR 54 0 Y 1 B CG2 THR 66 B A CG2 THR 54 0 Y 1 B VAL 47 A VAL 35 0 Y 1 B LYS 134 A LYS 122 1 Y 1 B PRO 135 A PRO 123 1 Y 1 B B H2 O ALA HOH 13 522 1.41 A 1 B B CB O ALA HOH 13 522 1.67 A 1 B B N O ALA HOH 13 522 1.83 A 1 B B CA O ALA HOH 13 522 2.10 A 1 6.22 0.80 106.30 112.52 B B B CD1 CG CD2 TRP TRP TRP 21 21 21 N 1 -5.21 0.80 107.30 102.09 B B B CE2 CD2 CG TRP TRP TRP 21 21 21 N 1 -4.46 0.70 120.80 116.34 B B B CB CG CD2 PHE PHE PHE 29 29 29 A A A N 1 -4.02 0.60 121.00 116.98 B B B CB CG CD2 TYR TYR TYR 43 43 43 N 1 3.68 0.50 120.30 123.98 B B B NE CZ NH1 ARG ARG ARG 59 59 59 N 1 13.88 2.30 115.30 129.18 B B B CA CB CG LEU LEU LEU 73 73 73 B B N 1 5.50 0.80 106.30 111.80 B B B CD1 CG CD2 TRP TRP TRP 75 75 75 N 1 -5.75 0.80 107.30 101.55 B B B CE2 CD2 CG TRP TRP TRP 75 75 75 N 1 5.03 0.80 106.30 111.33 B B B CD1 CG CD2 TRP TRP TRP 79 79 79 N 1 -5.25 0.80 107.30 102.05 B B B CE2 CD2 CG TRP TRP TRP 79 79 79 N 1 3.39 0.50 120.30 123.69 B B B NE CZ NH1 ARG ARG ARG 84 84 84 B B B N 1 -4.66 0.50 120.30 115.64 B B B NE CZ NH2 ARG ARG ARG 84 84 84 B B B N 1 6.25 0.80 106.30 112.55 B B B CD1 CG CD2 TRP TRP TRP 92 92 92 N 1 -6.25 0.80 107.30 101.05 B B B CE2 CD2 CG TRP TRP TRP 92 92 92 N 1 6.17 0.90 133.90 140.07 B B B CG CD2 CE3 TRP TRP TRP 92 92 92 N 1 6.49 0.80 106.30 112.79 B B B CD1 CG CD2 TRP TRP TRP 108 108 108 N 1 -5.56 0.80 107.30 101.74 B B B CE2 CD2 CG TRP TRP TRP 108 108 108 N 1 6.07 0.80 106.30 112.37 B B B CD1 CG CD2 TRP TRP TRP 120 120 120 N 1 -5.67 0.80 107.30 101.63 B B B CE2 CD2 CG TRP TRP TRP 120 120 120 N 1 P P NE2 CD2 HIS HIS 2 2 -0.068 0.011 1.373 1.305 N 1 B B O O HOH HOH 305 305 0.37 1_555 15_555 1 B B H1 H2 HOH HOH 313 313 0.59 1_555 10_655 1 B B O H1 HOH HOH 163 163 0.65 1_555 10_555 1 B B O O HOH HOH 163 163 0.68 1_555 10_555 1 B B O H1 HOH HOH 305 305 0.72 1_555 15_555 1 B B H2 H2 HOH HOH 544 544 0.87 1_555 10_655 1 B B O H2 HOH HOH 313 313 0.89 1_555 10_655 1 B B H2 H2 HOH HOH 163 163 0.96 1_555 10_555 1 B B O H2 HOH HOH 305 305 1.10 1_555 15_555 1 B B O H2 HOH HOH 163 163 1.13 1_555 10_555 1 B B H1 H2 HOH HOH 163 163 1.20 1_555 10_555 1 B B H1 H1 HOH HOH 279 279 1.25 1_555 10_655 1 B B O O HOH HOH 313 313 1.27 1_555 10_655 1 B B O H1 HOH HOH 313 313 1.27 1_555 10_655 1 B B H1 H2 HOH HOH 305 305 1.29 1_555 15_555 1 B B O O HOH HOH 447 500 1.90 1_555 8_555 1 B GLU 14 45.99 -91.52 1 B ASP 36 -106.77 41.58 1 B VAL 47 89.59 -64.30 1 B ASN 49 -178.67 148.13 1 B ALA 50 -65.66 2.44 1 B GLU 51 -141.16 -11.45 1 B ASP 67 B -141.39 21.16 A2PH36_PARAM19XB2_KBCO.PR A2PH36_TOPH19XB2_KBCO.PRO PARAM11_UCSF.WAT TOPH19.PEP PARAM19XB2_KBCO.PRO TOPH19XB2_KBCO.PRO THE FOLLOWING ATOMS HAD WEAK DENSITY AND OCCUPANCIES WERE REFINED: 13, 14, 15, (MAIN CHAIN OF GLN 24), (SIDE CHAIN OF GLN 24),(MAIN CHAIN OF LEU 25), (SIDE CHAIN OF LEU 25), GLY 26, (CG, OD1, OD2 OF ASP 36), (N, CA OF ALA 46), (CB, C, O OF ALA 46), VAL 47, GLY 48, ASN 49, ALA 50, SIDE CHAIN OF GLU 51, TERMINUS OF ARG 53, GLY 99, ALA 100, (CG, CD, OE1, OE2 OF GLU 101), TERMINUS OF ARG 103, (CE, NZ OF LYS 121), (ACE P 0 AND CYS P 1), PRO P 7, (CYS P 8 AND NH2 P 9). 0.2360000 0.1910000 0.1910000 1.92 7.5 9723 10. 77.5 1 2.0 1.92 7.5 76 1037 0 0 961 0.019 3.0 27.4 1.95 36.9 1VWF 12118 0.0800000 1 3.2 model building X-PLOR refinement X-PLOR data reduction SADIE data reduction SAINT phasing X-PLOR STREPTAVIDIN, PEPTIDE LIGAND CONTAINING HPQ STREPTAVIDIN COMPLEXED WITH CYCLO-AC-[CHPQGPPC]-NH2 MONOMER, PH 3.67 1 N N 2 N N 3 N N 3 N N B GLU 14 A GLU 2 HELX_P B GLY 16 A GLY 4 5 1 3 B GLU 116 A GLU 104 HELX_P B LYS 121 A LYS 109 5 2 6 disulf 2.593 P CYS 1 B SG CYS 2 1_555 P CYS 8 B SG CYS 9 5_554 covale 1.336 P ACE 0 B C ACE 1 1_555 P CYS 1 B N CYS 2 1_555 covale 1.325 P NH2 9 B N NH2 10 1_555 P CYS 8 B C CYS 9 1_555 COMPLEX (BIOTIN-BINDING PROTEIN/PEPTIDE) COMPLEX (BIOTIN-BINDING PROTEIN-PEPTIDE), CYCLIC PEPTIDE DISCOVERED BY PHAGE DISPLAY, COMPLEX (BIOTIN-BINDING PROTEIN-PEPTIDE) complex P PRO 6 B PRO 7 1 P PRO 7 B PRO 8 -22.62 SAV_STRAV UNP 1 1 P22629 MRKIVVAAIAVSLTTVSITASASADPSKDSKAQVSAAEAGITGTWYNQLGSTFIVTAGADGALTGTYESAVGNAESRYVL TGRYDSAPATDGSGTALGWTVAWKNNYRNAHSATTWSGQYVGGAEARINTQWLLTSGTTEANAWKSTLVGHDTFTKVKPS AASIDAAKKAGVNNGNPLDAVQQ 1VWF PDB 2 1VWF 37 159 1VWF 13 135 P22629 B 1 1 123 0 9 1VWF 0 9 1VWF P 2 1 10 8 anti-parallel anti-parallel anti-parallel anti-parallel anti-parallel anti-parallel anti-parallel B GLY 19 A GLY 7 B TYR 22 A TYR 10 B THR 28 A THR 16 B ALA 33 A ALA 21 B ALA 38 A ALA 26 B GLU 44 A GLU 32 B ARG 53 A ARG 41 B TYR 60 A TYR 48 B THR 71 A THR 59 B ALA 78 A ALA 66 B SER 88 A SER 76 B VAL 97 A VAL 85 B ARG 103 A ARG 91 B SER 112 A SER 100 B THR 123 A THR 111 B THR 131 A THR 119 BINDING SITE FOR RESIDUE NH2 P 9 Software 3 B SER 45 A SER 33 3 15_555 P CYS 8 B CYS 9 3 15_555 B HOH 293 C HOH 3 15_555 98 I 41 2 2