1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 0.00000 0.00000 0.00000 0000-0002-2695-0157 Safronova, V.N. 0000-0002-1788-1153 Lushpa, V.A. 0000-0001-8448-031X Panteleev, P.V. 0000-0002-5950-249X Ovchinnikova, T.V. 0000-0002-3635-1609 Bocharov, E.V. http://mmcif.pdb.org/dictionaries/ascii/mmcif_pdbx.dic 90.00 90.00 90.00 1.000 1.000 1.000 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 C3 H7 N O2 S 121.158 y CYSTEINE L-peptide linking C2 H5 N O2 75.067 y GLYCINE peptide linking C6 H13 N O2 131.173 y ISOLEUCINE L-peptide linking C9 H11 N O2 165.189 y PHENYLALANINE L-peptide linking C4 H9 N O3 119.119 y THREONINE 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 N 1 N N N 2 S C N 3 N C N 4 N O N 5 N C N 6 N O N 7 N H N 8 N H N 9 N H N 10 N H N 11 N H N 12 N H N 13 N H N 14 N N N 15 S C N 16 N C N 17 N O N 18 N C N 19 N C N 20 N C N 21 N N N 22 N C N 23 N N N 24 N N N 25 N O N 26 N H N 27 N H N 28 N H N 29 N H N 30 N H N 31 N H N 32 N H N 33 N H N 34 N H N 35 N H N 36 N H N 37 N H N 38 N H N 39 N H N 40 N H N 41 N N N 42 S C N 43 N C N 44 N O N 45 N C N 46 N C N 47 N O N 48 N N N 49 N O N 50 N H N 51 N H N 52 N H N 53 N H N 54 N H N 55 N H N 56 N H N 57 N H N 58 N N N 59 R C N 60 N C N 61 N O N 62 N C N 63 N S N 64 N O N 65 N H N 66 N H N 67 N H N 68 N H N 69 N H N 70 N H N 71 N H N 72 N N N 73 N C N 74 N C N 75 N O N 76 N O N 77 N H N 78 N H N 79 N H N 80 N H N 81 N H N 82 N N N 83 S C N 84 N C N 85 N O N 86 S C N 87 N C N 88 N C N 89 N C N 90 N O N 91 N H N 92 N H N 93 N H N 94 N H N 95 N H N 96 N H N 97 N H N 98 N H N 99 N H N 100 N H N 101 N H N 102 N H N 103 N H N 104 N N N 105 S C N 106 N C N 107 N O N 108 N C Y 109 N C Y 110 N C Y 111 N C Y 112 N C Y 113 N C Y 114 N C N 115 N O N 116 N H N 117 N H N 118 N H N 119 N H N 120 N H N 121 N H N 122 N H N 123 N H N 124 N H N 125 N H N 126 N H N 127 N N N 128 S C N 129 N C N 130 N O N 131 R C N 132 N O N 133 N C N 134 N O N 135 N H N 136 N H N 137 N H N 138 N H N 139 N H N 140 N H N 141 N H N 142 N H N 143 N H N 144 N N N 145 S C N 146 N C N 147 N O N 148 N C Y 149 N C Y 150 N C Y 151 N C Y 152 N C Y 153 N C Y 154 N C N 155 N O N 156 N O N 157 N H N 158 N H N 159 N H N 160 N H N 161 N H N 162 N H N 163 N H N 164 N H N 165 N H N 166 N H N 167 N H N 168 N N N 169 S C N 170 N C N 171 N O N 172 N C N 173 N C N 174 N C N 175 N O N 176 N H N 177 N H N 178 N H N 179 N H N 180 N H N 181 N H N 182 N H N 183 N H N 184 N H N 185 N H N 186 N H N 1 N sing N 2 N sing N 3 N sing N 4 N sing N 5 N sing N 6 N sing N 7 N doub N 8 N sing N 9 N sing N 10 N sing N 11 N sing N 12 N sing N 13 N sing N 14 N sing N 15 N sing N 16 N sing N 17 N sing N 18 N sing N 19 N doub N 20 N sing N 21 N sing N 22 N sing N 23 N sing N 24 N sing N 25 N sing N 26 N sing N 27 N sing N 28 N sing N 29 N sing N 30 N sing N 31 N sing N 32 N sing N 33 N doub N 34 N sing N 35 N sing N 36 N sing N 37 N sing N 38 N sing N 39 N sing N 40 N sing N 41 N sing N 42 N sing N 43 N sing N 44 N sing N 45 N doub N 46 N sing N 47 N sing N 48 N sing N 49 N sing N 50 N doub N 51 N sing N 52 N sing N 53 N sing N 54 N sing N 55 N sing N 56 N sing N 57 N sing N 58 N sing N 59 N sing N 60 N sing N 61 N doub N 62 N sing N 63 N sing N 64 N sing N 65 N sing N 66 N sing N 67 N sing N 68 N sing N 69 N sing N 70 N sing N 71 N sing N 72 N sing N 73 N sing N 74 N doub N 75 N sing N 76 N sing N 77 N sing N 78 N sing N 79 N sing N 80 N sing N 81 N sing N 82 N sing N 83 N doub N 84 N sing N 85 N sing N 86 N sing N 87 N sing N 88 N sing N 89 N sing N 90 N sing N 91 N sing N 92 N sing N 93 N sing N 94 N sing N 95 N sing N 96 N sing N 97 N sing N 98 N sing N 99 N sing N 100 N sing N 101 N sing N 102 N sing N 103 N sing N 104 N doub N 105 N sing N 106 N sing N 107 N sing N 108 N sing Y 109 N doub Y 110 N sing Y 111 N sing N 112 N sing Y 113 N doub N 114 N sing Y 115 N doub N 116 N sing Y 117 N sing N 118 N sing N 119 N sing N 120 N sing N 121 N sing N 122 N sing N 123 N sing N 124 N sing N 125 N sing N 126 N sing N 127 N doub N 128 N sing N 129 N sing N 130 N sing N 131 N sing N 132 N sing N 133 N sing N 134 N sing N 135 N sing N 136 N sing N 137 N sing N 138 N sing N 139 N sing N 140 N sing N 141 N sing N 142 N sing N 143 N doub N 144 N sing N 145 N sing N 146 N sing N 147 N sing Y 148 N doub Y 149 N sing Y 150 N sing N 151 N sing Y 152 N doub N 153 N sing Y 154 N doub N 155 N sing Y 156 N sing N 157 N sing N 158 N sing N 159 N sing N 160 N sing N 161 N sing N 162 N sing N 163 N sing N 164 N sing N 165 N sing N 166 N sing N 167 N doub N 168 N sing N 169 N sing N 170 N sing N 171 N sing N 172 N sing N 173 N sing N 174 N sing N 175 N sing N 176 N sing N 177 N sing N 178 N sing CH Mar Drugs 1660-3397 24 10.3390/md24050154 42188290 Marine Antimicrobial Peptide as a Promising Alternative to Polymyxin B. 2026 0000-0002-2695-0157 0000-0002-1788-1153 0000-0001-6361-1042 0000-0002-0155-4414 0000-0002-4778-344X 0000-0002-3539-4906 0000-0003-3759-380X 0000-0002-9581-2233 0000-0001-6309-7645 0000-0002-3053-2804 0000-0002-3635-1609 0000-0001-8448-031X 0000-0002-5950-249X 10.2210/pdb9xao/pdb pdb_00009xao 10.13018/BMR36801 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 0.00000 0.00000 0.00000 2487.934 antimicrobial peptide Ap9 1 man polymer no no GYCFTACARRNGVRICYRRCN GYCFTACARRNGVRICYRRCN A polypeptide(L) n n n n n n n n n n n n n n n n n n n n n pBR322 origin, bla, T7 promotorter, T7 terminator, TrxA (M37L), His8, mature sequence of Ap9 sample 1 21 273052 Abarenicola pacifica 469008 Escherichia coli BL21(DE3) plasmid Biological sequence pET repository Initial release 1 0 2026-06-10 Russian Federation Russian Science Foundation 22-14-00380 Russian Federation Russian Science Foundation 25-74-10089 ovch@ibch.ru 0000-0002-5950-249X Tatiana Ovchinnikova V. principal investigator/group leader lushpa1696@gmail.com 0000-0002-1788-1153 Vladislav Lushpa A. principal investigator/group leader Spatial structure of the antimicrobial peptide Ap9 N PDBJ Y PDBJ 2025-10-22 REL REL Y A CYS 3 Disulfide bridge SG A CYS 3 A CYS 20 SG A CYS 20 1_555 1_555 None A CYS 7 Disulfide bridge SG A CYS 7 A CYS 16 SG A CYS 16 1_555 1_555 None structures with the least restraint violations 100 10 isotropic 1 2D 1H-1H NOESY isotropic 1 2D 1H-13C HSQC isotropic 1 2D 1H-1H TOCSY isotropic 1 2D 1H-15N HSQC isotropic 1 2D 1H-1H NOESY isotropic 1 2D 1H-1H COSY isotropic 1 2D 1H-1H NOESY isotropic 1 2D 1H-13C HSQC isotropic 1 2D 1H-1H TOCSY isotropic 1 2D 1H-15N HSQC isotropic 1 2D 1H-1H NOESY isotropic 1 2D 1H-13C HSQC isotropic 1 2D 1H-1H TOCSY isotropic 1 2D 1H-15N HSQC 95 % natural abundance 5 % [U-100% 2H] 0.001 % natural abundance 100 % [U-100% 2H] 0.001 % natural abundance NULL Not defined conditions_1 4.8 pH AMBIENT Pa 293 K NULL Not defined conditions_2 4.8 pH AMBIENT Pa 303 K NULL Not defined conditions_3 4.8 pH AMBIENT Pa 313 K torsion angle dynamics 1 target function 95 % H2O, 5 % [U-100% 2H] D2O, 0.001 % sodium azide, 95% H2O/5% D2O nature abundance 95% H2O/5% D2O solution 100 % [U-100% 2H] D2O, 0.001 % sodium azide, 100% D2O nature abundance 100% D2O solution Guntert, Mumenthaler and Wuthrich refinement CYANA 3.98.13 Guntert, Mumenthaler and Wuthrich structure calculation CYANA 3.98.13 Keller and Wuthrich chemical shift assignment CARA 1.9.1.7 Bruker Biospin collection TopSpin Keller and Wuthrich peak picking CARA 1.9.1.7 600 Bruker AVANCE III GLY 1 n 1 GLY 1 A TYR 2 n 2 TYR 2 A CYS 3 n 3 CYS 3 A PHE 4 n 4 PHE 4 A THR 5 n 5 THR 5 A ALA 6 n 6 ALA 6 A CYS 7 n 7 CYS 7 A ALA 8 n 8 ALA 8 A ARG 9 n 9 ARG 9 A ARG 10 n 10 ARG 10 A ASN 11 n 11 ASN 11 A GLY 12 n 12 GLY 12 A VAL 13 n 13 VAL 13 A ARG 14 n 14 ARG 14 A ILE 15 n 15 ILE 15 A CYS 16 n 16 CYS 16 A TYR 17 n 17 TYR 17 A ARG 18 n 18 ARG 18 A ARG 19 n 19 ARG 19 A CYS 20 n 20 CYS 20 A ASN 21 n 21 ASN 21 A author_and_software_defined_assembly 1 monomeric not applicable NMR Distance Restraints 1.0 0.0 0.0 0.0 1.0 0.0 0.0 0.0 1.0 1_555 x,y,z identity operation 0.0 0.0 0.0 A N ALA 6 A N ALA 6 A O TYR 17 A O TYR 17 1 A ARG 10 -89.36 -75.36 1 A CYS 20 -93.96 38.62 3 A ARG 10 -84.47 -75.47 3 A ASN 11 -142.51 -41.49 3 A CYS 20 -100.85 74.28 4 A ARG 10 -84.28 -75.48 4 A CYS 20 -93.93 39.53 5 A ARG 10 -83.51 -75.62 5 A CYS 20 -101.98 78.55 6 A ARG 10 -83.98 -75.59 7 A ARG 10 -89.07 -75.58 7 A ARG 14 -152.85 86.75 7 A CYS 20 -97.17 36.77 8 A CYS 20 -94.44 38.02 9 A ARG 10 -84.47 -75.28 10 A CYS 20 -117.08 78.91 N Spatial structure of the antimicrobial peptide Ap9 1 N N disulf 1.992 A CYS 3 A SG CYS 3 1_555 A CYS 20 A SG CYS 20 1_555 disulf 1.993 A CYS 7 A SG CYS 7 1_555 A CYS 16 A SG CYS 16 1_555 ANTIBIOTIC antibiotic, antimicrobial peptides, protein 9XAO PDB 1 1 9XAO 1 21 9XAO 1 21 9XAO A 1 1 21 2 anti-parallel A PHE 4 A PHE 4 A ALA 8 A ALA 8 A ILE 15 A ILE 15 A ARG 19 A ARG 19 1 P 1