1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 0.00000 0.00000 0.00000 Martins, J.C. Enassar, M. Willem, R. Wieruzeski, J.M. Lippens, G. Wodak, S.J. http://mmcif.pdb.org/dictionaries/ascii/mmcif_pdbx.dic 1 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 H9 N O4 147.129 y GLUTAMIC ACID L-peptide linking C2 H5 N O2 75.067 y GLYCINE peptide linking C6 H13 N O2 131.173 y ISOLEUCINE L-peptide linking C6 H15 N2 O2 1 147.195 y LYSINE L-peptide linking C5 H11 N O2 S 149.211 y METHIONINE 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 IX Eur.J.Biochem. EJBCAI 0262 0014-2956 268 2379 2389 10.1046/j.1432-1327.2001.02118.x 11298757 Solution structure of the main alpha-amylase inhibitor from amaranth seeds. 2001 10.2210/pdb1htx/pdb pdb_00001htx 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 0.00000 0.00000 0.00000 3595.113 ALPHA-AMYLASE INHIBITOR AAI 1 nat polymer no no CIPKWNRCGPKMDGVPCCEPYTCTSDYYGNCS CIPKWNRCGPKMDGVPCCEPYTCTSDYYGNCS A 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 grain amaranth Amaranthus sample 28502 SEEDS Amaranthus hypochondriacus database_2 pdbx_nmr_software pdbx_nmr_spectrometer pdbx_struct_assembly pdbx_struct_oper_list repository Initial release Version format compliance Version format compliance Data collection Database references Derived calculations 1 0 2001-07-18 1 1 2008-04-27 1 2 2011-07-13 1 3 2022-02-23 _database_2.pdbx_DOI _database_2.pdbx_database_accession _pdbx_nmr_software.name _pdbx_nmr_spectrometer.model Alpha-Amylase Inhibitor Independantly determined NMR solution structure Crystal Structure of the Amaranth Alpha-Amylase Inhibitor in Complex with the Alpha-Amylase from the Yellow Mealworm at 2.00 A Resolution RCSB Y RCSB 2001-01-02 REL This structure was determined from 2D 1H NMR techniques only using the sequence specific resonance assignment procedure, followed by NOE and J data collection, calculation bij X-plor and refinement with MSI's CVFF forcefield structures with favorable non-bond energy,structures with the least restraint violations 100 20 DQF-COSY DQF-COSY TOCSY TOCSY 2D NOESY 2D NOESY 2.95 ambient 277 K 2.95 ambient 277 K restrained MD at 1000K follwed by stepwise cooling to 300K and final restrained energy optimisation simulated annealing 1 1.8 mM AAI, 0.05 mM NaN3 90% H2O/10% D2O 1.8 mM AAI, 0.05 mM NaN3 100% D2O Bruker collection XwinNMR 2.5 Varian collection VNMR Nilges, M. structure solution X-PLOR 3.1 MSI refinement NMR_Refine 98.0 600 Bruker AVANCE 500 Bruker AMX 600 Varian UNITY CYS 1 n 1 CYS 1 A ILE 2 n 2 ILE 2 A PRO 3 n 3 PRO 3 A LYS 4 n 4 LYS 4 A TRP 5 n 5 TRP 5 A ASN 6 n 6 ASN 6 A ARG 7 n 7 ARG 7 A CYS 8 n 8 CYS 8 A GLY 9 n 9 GLY 9 A PRO 10 n 10 PRO 10 A LYS 11 n 11 LYS 11 A MET 12 n 12 MET 12 A ASP 13 n 13 ASP 13 A GLY 14 n 14 GLY 14 A VAL 15 n 15 VAL 15 A PRO 16 n 16 PRO 16 A CYS 17 n 17 CYS 17 A CYS 18 n 18 CYS 18 A GLU 19 n 19 GLU 19 A PRO 20 n 20 PRO 20 A TYR 21 n 21 TYR 21 A THR 22 n 22 THR 22 A CYS 23 n 23 CYS 23 A THR 24 n 24 THR 24 A SER 25 n 25 SER 25 A ASP 26 n 26 ASP 26 A TYR 27 n 27 TYR 27 A TYR 28 n 28 TYR 28 A GLY 29 n 29 GLY 29 A ASN 30 n 30 ASN 30 A CYS 31 n 31 CYS 31 A SER 32 n 32 SER 32 A author_defined_assembly 1 monomeric 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 A O CYS 8 A O CYS 8 A N GLY 29 A N GLY 29 9 A A HG H SER ASP 25 26 1.35 3 A TYR 21 0.069 SIDE CHAIN 7 A TYR 21 0.070 SIDE CHAIN 9 A TYR 21 0.067 SIDE CHAIN 12 A TYR 21 0.073 SIDE CHAIN 13 A TYR 21 0.069 SIDE CHAIN 15 A TYR 21 0.070 SIDE CHAIN 1 -5.43 0.90 109.00 103.57 A A A CD1 NE1 CE2 TRP TRP TRP 5 5 5 N 1 3.78 0.50 120.30 124.08 A A A NE CZ NH1 ARG ARG ARG 7 7 7 N 1 -6.16 0.90 118.30 112.14 A A A CB CG OD2 ASP ASP ASP 26 26 26 N 2 -5.48 0.90 109.00 103.52 A A A CD1 NE1 CE2 TRP TRP TRP 5 5 5 N 2 3.66 0.50 120.30 123.96 A A A NE CZ NH1 ARG ARG ARG 7 7 7 N 2 -5.77 0.90 118.30 112.53 A A A CB CG OD2 ASP ASP ASP 13 13 13 N 2 -5.90 0.90 118.30 112.40 A A A CB CG OD2 ASP ASP ASP 26 26 26 N 3 3.69 0.50 120.30 123.99 A A A NE CZ NH1 ARG ARG ARG 7 7 7 N 3 5.95 0.90 118.30 124.25 A A A CB CG OD1 ASP ASP ASP 13 13 13 N 3 -6.33 0.90 118.30 111.97 A A A CB CG OD2 ASP ASP ASP 13 13 13 N 3 -6.15 0.90 118.30 112.15 A A A CB CG OD2 ASP ASP ASP 26 26 26 N 4 -5.43 0.90 109.00 103.57 A A A CD1 NE1 CE2 TRP TRP TRP 5 5 5 N 4 3.73 0.50 120.30 124.03 A A A NE CZ NH1 ARG ARG ARG 7 7 7 N 4 -6.02 0.90 118.30 112.28 A A A CB CG OD2 ASP ASP ASP 13 13 13 N 4 -6.05 0.90 118.30 112.25 A A A CB CG OD2 ASP ASP ASP 26 26 26 N 5 3.79 0.50 120.30 124.09 A A A NE CZ NH1 ARG ARG ARG 7 7 7 N 5 -5.94 0.90 118.30 112.36 A A A CB CG OD2 ASP ASP ASP 13 13 13 N 5 -5.99 0.90 118.30 112.31 A A A CB CG OD2 ASP ASP ASP 26 26 26 N 6 3.72 0.50 120.30 124.02 A A A NE CZ NH1 ARG ARG ARG 7 7 7 N 6 -5.96 0.90 118.30 112.34 A A A CB CG OD2 ASP ASP ASP 26 26 26 N 7 3.78 0.50 120.30 124.08 A A A NE CZ NH1 ARG ARG ARG 7 7 7 N 7 5.87 0.90 118.30 124.17 A A A CB CG OD1 ASP ASP ASP 13 13 13 N 7 -6.29 0.90 118.30 112.01 A A A CB CG OD2 ASP ASP ASP 13 13 13 N 7 -5.99 0.90 118.30 112.31 A A A CB CG OD2 ASP ASP ASP 26 26 26 N 8 -5.47 0.90 109.00 103.53 A A A CD1 NE1 CE2 TRP TRP TRP 5 5 5 N 8 3.77 0.50 120.30 124.07 A A A NE CZ NH1 ARG ARG ARG 7 7 7 N 8 -5.81 0.90 118.30 112.49 A A A CB CG OD2 ASP ASP ASP 13 13 13 N 8 -6.17 0.90 118.30 112.13 A A A CB CG OD2 ASP ASP ASP 26 26 26 N 9 3.81 0.50 120.30 124.11 A A A NE CZ NH1 ARG ARG ARG 7 7 7 N 9 5.76 0.90 118.30 124.06 A A A CB CG OD1 ASP ASP ASP 13 13 13 N 9 -6.19 0.90 118.30 112.11 A A A CB CG OD2 ASP ASP ASP 13 13 13 N 9 -6.18 0.90 118.30 112.12 A A A CB CG OD2 ASP ASP ASP 26 26 26 N 10 -5.51 0.90 109.00 103.49 A A A CD1 NE1 CE2 TRP TRP TRP 5 5 5 N 10 3.74 0.50 120.30 124.04 A A A NE CZ NH1 ARG ARG ARG 7 7 7 N 10 -6.07 0.90 118.30 112.23 A A A CB CG OD2 ASP ASP ASP 13 13 13 N 10 -6.01 0.90 118.30 112.29 A A A CB CG OD2 ASP ASP ASP 26 26 26 N 11 -5.43 0.90 109.00 103.57 A A A CD1 NE1 CE2 TRP TRP TRP 5 5 5 N 11 3.69 0.50 120.30 123.99 A A A NE CZ NH1 ARG ARG ARG 7 7 7 N 11 -6.05 0.90 118.30 112.25 A A A CB CG OD2 ASP ASP ASP 13 13 13 N 11 -6.12 0.90 118.30 112.18 A A A CB CG OD2 ASP ASP ASP 26 26 26 N 12 3.66 0.50 120.30 123.96 A A A NE CZ NH1 ARG ARG ARG 7 7 7 N 12 -6.08 0.90 118.30 112.22 A A A CB CG OD2 ASP ASP ASP 13 13 13 N 12 -6.02 0.90 118.30 112.28 A A A CB CG OD2 ASP ASP ASP 26 26 26 N 13 3.77 0.50 120.30 124.07 A A A NE CZ NH1 ARG ARG ARG 7 7 7 N 13 -5.97 0.90 118.30 112.33 A A A CB CG OD2 ASP ASP ASP 13 13 13 N 13 -6.05 0.90 118.30 112.25 A A A CB CG OD2 ASP ASP ASP 26 26 26 N 14 3.87 0.50 120.30 124.17 A A A NE CZ NH1 ARG ARG ARG 7 7 7 N 14 5.77 0.90 118.30 124.07 A A A CB CG OD1 ASP ASP ASP 13 13 13 N 14 -6.19 0.90 118.30 112.11 A A A CB CG OD2 ASP ASP ASP 13 13 13 N 14 -6.00 0.90 118.30 112.30 A A A CB CG OD2 ASP ASP ASP 26 26 26 N 15 3.71 0.50 120.30 124.01 A A A NE CZ NH1 ARG ARG ARG 7 7 7 N 15 -6.14 0.90 118.30 112.16 A A A CB CG OD2 ASP ASP ASP 26 26 26 N 16 3.88 0.50 120.30 124.18 A A A NE CZ NH1 ARG ARG ARG 7 7 7 N 16 -5.84 0.90 118.30 112.46 A A A CB CG OD2 ASP ASP ASP 13 13 13 N 16 -6.07 0.90 118.30 112.23 A A A CB CG OD2 ASP ASP ASP 26 26 26 N 17 -5.43 0.90 109.00 103.57 A A A CD1 NE1 CE2 TRP TRP TRP 5 5 5 N 17 3.79 0.50 120.30 124.09 A A A NE CZ NH1 ARG ARG ARG 7 7 7 N 17 6.02 0.90 118.30 124.32 A A A CB CG OD1 ASP ASP ASP 13 13 13 N 17 -6.60 0.90 118.30 111.70 A A A CB CG OD2 ASP ASP ASP 13 13 13 N 17 -5.85 0.90 118.30 112.45 A A A CB CG OD2 ASP ASP ASP 26 26 26 N 18 -5.42 0.90 109.00 103.58 A A A CD1 NE1 CE2 TRP TRP TRP 5 5 5 N 18 3.71 0.50 120.30 124.01 A A A NE CZ NH1 ARG ARG ARG 7 7 7 N 18 -6.13 0.90 118.30 112.17 A A A CB CG OD2 ASP ASP ASP 13 13 13 N 18 8.64 1.40 112.40 121.04 A A A CA CB CG2 THR THR THR 24 24 24 N 18 -6.05 0.90 118.30 112.25 A A A CB CG OD2 ASP ASP ASP 26 26 26 N 19 -5.52 0.90 109.00 103.48 A A A CD1 NE1 CE2 TRP TRP TRP 5 5 5 N 19 3.82 0.50 120.30 124.12 A A A NE CZ NH1 ARG ARG ARG 7 7 7 N 19 5.77 0.90 118.30 124.07 A A A CB CG OD1 ASP ASP ASP 13 13 13 N 19 -6.18 0.90 118.30 112.12 A A A CB CG OD2 ASP ASP ASP 13 13 13 N 19 -6.06 0.90 118.30 112.24 A A A CB CG OD2 ASP ASP ASP 26 26 26 N 20 -5.41 0.90 109.00 103.59 A A A CD1 NE1 CE2 TRP TRP TRP 5 5 5 N 20 3.68 0.50 120.30 123.98 A A A NE CZ NH1 ARG ARG ARG 7 7 7 N 20 -6.00 0.90 118.30 112.30 A A A CB CG OD2 ASP ASP ASP 13 13 13 N 20 -5.92 0.90 118.30 112.38 A A A CB CG OD2 ASP ASP ASP 26 26 26 N 1 A A CD OE2 GLU GLU 19 19 0.120 0.011 1.252 1.372 N 1 A A C OXT SER SER 32 32 0.147 0.019 1.229 1.376 N 2 A A CD OE2 GLU GLU 19 19 0.119 0.011 1.252 1.371 N 2 A A C OXT SER SER 32 32 0.140 0.019 1.229 1.369 N 3 A A CD OE2 GLU GLU 19 19 0.120 0.011 1.252 1.372 N 3 A A C OXT SER SER 32 32 0.145 0.019 1.229 1.374 N 4 A A CD OE2 GLU GLU 19 19 0.120 0.011 1.252 1.372 N 4 A A C OXT SER SER 32 32 0.141 0.019 1.229 1.370 N 5 A A CD OE2 GLU GLU 19 19 0.119 0.011 1.252 1.371 N 5 A A C OXT SER SER 32 32 0.145 0.019 1.229 1.374 N 6 A A CD OE2 GLU GLU 19 19 0.119 0.011 1.252 1.371 N 6 A A C OXT SER SER 32 32 0.146 0.019 1.229 1.375 N 7 A A CD OE2 GLU GLU 19 19 0.119 0.011 1.252 1.371 N 7 A A C OXT SER SER 32 32 0.138 0.019 1.229 1.367 N 8 A A CD OE2 GLU GLU 19 19 0.120 0.011 1.252 1.372 N 8 A A C OXT SER SER 32 32 0.145 0.019 1.229 1.374 N 9 A A CD OE2 GLU GLU 19 19 0.121 0.011 1.252 1.373 N 9 A A C OXT SER SER 32 32 0.147 0.019 1.229 1.376 N 10 A A CD OE2 GLU GLU 19 19 0.120 0.011 1.252 1.372 N 10 A A C OXT SER SER 32 32 0.140 0.019 1.229 1.369 N 11 A A CD OE2 GLU GLU 19 19 0.120 0.011 1.252 1.372 N 11 A A C OXT SER SER 32 32 0.140 0.019 1.229 1.369 N 12 A A CD OE2 GLU GLU 19 19 0.120 0.011 1.252 1.372 N 12 A A C OXT SER SER 32 32 0.138 0.019 1.229 1.367 N 13 A A CD OE2 GLU GLU 19 19 0.120 0.011 1.252 1.372 N 13 A A C OXT SER SER 32 32 0.147 0.019 1.229 1.376 N 14 A A CD OE2 GLU GLU 19 19 0.120 0.011 1.252 1.372 N 14 A A C OXT SER SER 32 32 0.145 0.019 1.229 1.374 N 15 A A CD OE2 GLU GLU 19 19 0.119 0.011 1.252 1.371 N 15 A A C OXT SER SER 32 32 0.140 0.019 1.229 1.369 N 16 A A CD OE2 GLU GLU 19 19 0.120 0.011 1.252 1.372 N 16 A A C OXT SER SER 32 32 0.143 0.019 1.229 1.372 N 17 A A CD OE2 GLU GLU 19 19 0.119 0.011 1.252 1.371 N 17 A A C OXT SER SER 32 32 0.141 0.019 1.229 1.370 N 18 A A CD OE2 GLU GLU 19 19 0.119 0.011 1.252 1.371 N 18 A A C OXT SER SER 32 32 0.146 0.019 1.229 1.375 N 19 A A CD OE2 GLU GLU 19 19 0.121 0.011 1.252 1.373 N 19 A A C OXT SER SER 32 32 0.147 0.019 1.229 1.376 N 20 A A CD OE2 GLU GLU 19 19 0.119 0.011 1.252 1.371 N 20 A A C OXT SER SER 32 32 0.140 0.019 1.229 1.369 N 1 A PRO 3 -66.37 -175.29 1 A MET 12 -103.29 -63.33 1 A THR 24 -91.27 50.59 1 A ASP 26 -136.72 -57.91 2 A PRO 3 -66.44 -177.57 2 A PRO 16 -59.44 174.26 2 A THR 24 -92.74 49.85 2 A ASP 26 -137.46 -67.45 3 A MET 12 -97.76 -67.96 3 A THR 24 -93.62 55.39 3 A ASP 26 -133.21 -59.30 4 A PRO 3 -65.82 -178.62 4 A MET 12 -93.68 -65.27 4 A THR 24 -90.15 40.50 4 A ASP 26 -141.22 -63.56 4 A ASN 30 -174.20 147.33 5 A ASP 13 -142.50 17.33 5 A THR 24 -90.58 41.86 5 A ASP 26 -134.02 -69.78 5 A ASN 30 -173.10 149.07 6 A MET 12 -98.44 -68.83 6 A THR 24 -95.22 56.46 6 A ASP 26 -144.73 -62.84 7 A MET 12 -97.05 -68.52 7 A THR 24 -92.74 54.76 7 A ASP 26 -135.05 -56.09 8 A PRO 16 -59.44 173.28 8 A THR 24 -92.11 48.65 8 A ASP 26 -134.66 -69.75 9 A MET 12 -101.91 -69.36 9 A PRO 16 -54.08 175.05 9 A ASP 26 -130.32 -60.99 9 A ASN 30 -175.19 149.15 10 A PRO 3 -65.66 -178.75 10 A MET 12 -95.19 -66.75 10 A THR 24 -93.03 49.34 10 A ASP 26 -137.85 -66.73 11 A PRO 3 -65.89 -175.25 11 A MET 12 -101.84 -63.03 11 A ASP 26 -130.65 -60.18 11 A ASN 30 -175.88 146.23 12 A PRO 16 -57.99 174.54 12 A CYS 23 -59.35 106.92 12 A THR 24 -95.03 56.58 12 A ASP 26 -140.33 -67.84 13 A TRP 5 64.18 65.68 13 A MET 12 -93.09 -64.97 13 A THR 24 -83.91 33.33 13 A ASP 26 -136.29 -73.59 14 A MET 12 -101.46 -69.09 14 A CYS 18 -74.36 -168.77 14 A THR 24 -96.04 52.73 14 A ASP 26 -149.34 -64.92 15 A MET 12 -102.58 -69.08 15 A PRO 16 -53.79 175.05 15 A ASP 26 -131.53 -60.28 15 A ASN 30 -174.32 149.27 16 A ASN 6 -118.24 -105.56 16 A ARG 7 -173.00 138.17 16 A ASP 13 -142.67 20.13 16 A ASP 26 -127.11 -64.62 17 A PRO 3 -66.26 -177.27 17 A MET 12 -102.34 -63.52 17 A THR 24 -93.25 56.40 17 A ASP 26 -136.81 -54.73 18 A TRP 5 60.11 61.97 18 A MET 12 -97.50 -66.30 18 A PRO 16 -59.48 173.57 18 A ASP 26 -151.26 -60.64 19 A MET 12 -98.16 -69.07 19 A THR 24 -88.37 41.20 19 A ASP 26 -138.89 -68.55 20 A TRP 5 61.38 62.43 20 A MET 12 -95.76 -65.20 20 A PRO 16 -59.05 175.61 20 A THR 24 -92.26 54.69 20 A ASP 26 -135.46 -56.09 SOLUTION STRUCTURE OF THE MAIN ALPHA-AMYLASE INHIBITOR FROM AMARANTH SEEDS 1 N N disulf 1.994 A CYS 1 A SG CYS 1 1_555 A CYS 18 A SG CYS 18 1_555 disulf 1.986 A CYS 8 A SG CYS 8 1_555 A CYS 23 A SG CYS 23 1_555 disulf 1.959 A CYS 17 A SG CYS 17 1_555 A CYS 31 A SG CYS 31 1_555 PLANT PROTEIN cysteine knot, PLANT PROTEIN A GLU 19 A GLU 19 1 A PRO 20 A PRO 20 6.78 A GLU 19 A GLU 19 2 A PRO 20 A PRO 20 6.68 A GLU 19 A GLU 19 3 A PRO 20 A PRO 20 6.48 A GLU 19 A GLU 19 4 A PRO 20 A PRO 20 6.67 A GLU 19 A GLU 19 5 A PRO 20 A PRO 20 6.45 A GLU 19 A GLU 19 6 A PRO 20 A PRO 20 6.34 A GLU 19 A GLU 19 7 A PRO 20 A PRO 20 6.57 A GLU 19 A GLU 19 8 A PRO 20 A PRO 20 6.61 A GLU 19 A GLU 19 9 A PRO 20 A PRO 20 6.47 A GLU 19 A GLU 19 10 A PRO 20 A PRO 20 6.74 A GLU 19 A GLU 19 11 A PRO 20 A PRO 20 6.83 A GLU 19 A GLU 19 12 A PRO 20 A PRO 20 6.55 A GLU 19 A GLU 19 13 A PRO 20 A PRO 20 6.45 A GLU 19 A GLU 19 14 A PRO 20 A PRO 20 5.68 A GLU 19 A GLU 19 15 A PRO 20 A PRO 20 6.50 A GLU 19 A GLU 19 16 A PRO 20 A PRO 20 6.49 A GLU 19 A GLU 19 17 A PRO 20 A PRO 20 6.74 A GLU 19 A GLU 19 18 A PRO 20 A PRO 20 6.82 A GLU 19 A GLU 19 19 A PRO 20 A PRO 20 6.70 A GLU 19 A GLU 19 20 A PRO 20 A PRO 20 6.70 IAAI_AMAHP UNP 1 1 P80403 CIPKWNRCGPKMDGVPCCEPYTCTSDYYGNCS 1 32 1HTX 1 32 P80403 A 1 1 32 2 anti-parallel A ARG 7 A ARG 7 A CYS 8 A CYS 8 A GLY 29 A GLY 29 A ASN 30 A ASN 30