0.005928 0.000000 0.000000 0.000000 0.004316 0.000000 0.000000 0.000000 0.018587 0.00000 0.00000 0.00000 Bullough, P.A. Hughson, F.M. Skehel, J.J. Wiley, D.C. http://mmcif.pdb.org/dictionaries/ascii/mmcif_pdbx.dic 24 90.00 90.00 90.00 168.700 231.700 53.800 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 C5 H11 N O2 S 149.211 y METHIONINE L-peptide linking 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 UK Nature NATUAS 0006 0028-0836 371 37 43 10.1038/371037a0 8072525 Structure of influenza haemagglutinin at the pH of membrane fusion. 1994 UK J.Mol.Biol. JMOBAK 0070 0022-2836 236 1262 Crystals of a Fragment of Influenza Haemagglutinin in the Low Ph Induced Conformation 1994 UK J.Mol.Biol. JMOBAK 0070 0022-2836 212 737 Refinement of the Influenza Virus Hemagglutinin by Simulated Annealing 1990 US J.Gen.Virol. JGVIAY 2058 0022-1317 69 2785 Studies on the Structure of the Influenza Virus Haemagglutinin at the Ph of Membrane Fusion 1988 US J.Gen.Virol. JGVIAY 2058 0022-1317 64 1264 Analyses of the Antigenicity of Influenza Haemagglutinin at the Ph Optimum for Virus-Mediated Membrane Fusion 1983 US Proc.Natl.Acad.Sci.USA PNASA6 0040 0027-8424 79 93 Changes in the Conformation of Influenza Virus Hemagglutinin at the Ph Optimum of Virus-Mediated Membrane Fusion 1982 UK Nature NATUAS 0006 0028-0836 289 366 Structure of the Haemagglutinin Membrane Glycoprotein of Influenza Virus at 3 Angstroms Resolution 1981 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 0.00000 0.00000 0.00000 1 x-ray 1 1.0 2776.066 HEMAGGLUTININ HA1 CHAIN 3 man polymer 16268.125 HEMAGGLUTININ HA2 CHAIN 3 man polymer 18.015 water 37 nat water no no QDLPGNDNSTATLCLGHHAVPNGTLVK QDLPGNDNSTATLCLGHHAVPNGTLVK A,C,E polypeptide(L) no no LKSTQAAIDQINGKLNRVIEKTNEKFHQIEKEFSEVEGRIQDLEKYVEDTKIDLWSYNAELLVALENQHTIDLTDSEMNK LFEKTRRQLRENAEEMGNGCFKIYHKCDNACIESIRNGTYDHDVYRDEALNNRFQIKG LKSTQAAIDQINGKLNRVIEKTNEKFHQIEKEFSEVEGRIQDLEKYVEDTKIDLWSYNAELLVALENQHTIDLTDSEMNK LFEKTRRQLRENAEEMGNGCFKIYHKCDNACIESIRNGTYDHDVYRDEALNNRFQIKG B,D,F 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 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 sample 140147 uncultured beta proteobacterium UMTRA-608 sample 140147 uncultured beta proteobacterium UMTRA-608 4.60 73.26 repository Initial release Version format compliance Version format compliance 1 0 1995-02-14 1 1 2008-03-24 1 2 2011-07-13 Y 1994-11-02 REL HOH water IN THE VIRUS, HEMAGGLUTININ IS A TRIMER OF IDENTICAL SUBUNITS, EACH CONSISTING OF A DISULFIDE-LINKED DIMER OF HA1 AND HA2 CHAINS. THE HA1 CHAIN CONSISTS OF 328 RESIDUES AND THE HA2 CHAIN CONSISTS OF 220 RESIDUES. HEMAGGLUTININ MAY BE SOLUBILIZED FROM THE VIRAL MEMBRANE BY BROMELAIN DIGESTION, WHICH REMOVES THE C-TERMINAL HYDROPHOBIC (ANCHORING) DOMAIN FROM CHAIN HA2. AFTER BROMELAIN DIGESTION CHAIN HA2 CONSISTS OF 175 RESIDUES; THE STRUCTURE OF THIS SOLUBLE TRIMER HAS BEEN DETERMINED PREVIOUSLY (SEE REFERENCES). AFTER EXPOSURE TO THE PH OF MEMBRANE FUSION, THE BROMELAIN-SOLUBILIZED TRIMERS AGGREGATE AND BECOME SUSCEPTIBLE TO DIGESTION WITH TRYPSIN AND THERMOLYSIN. SUCCESSIVE DIGESTION WITH THESE PROTEASES YIELDS A SOLUBLE TRIMER CALLED TBHA2, WHOSE STRUCTURE IS PRESENTED IN THIS ENTRY. HOH 1001 3 HOH HOH 1001 B HOH 1002 3 HOH HOH 1002 B HOH 1010 3 HOH HOH 1010 B HOH 1015 3 HOH HOH 1015 B HOH 1016 3 HOH HOH 1016 B HOH 1018 3 HOH HOH 1018 B HOH 1019 3 HOH HOH 1019 B HOH 1021 3 HOH HOH 1021 B HOH 1022 3 HOH HOH 1022 B HOH 1031 3 HOH HOH 1031 B HOH 1032 3 HOH HOH 1032 B HOH 1033 3 HOH HOH 1033 B HOH 1037 3 HOH HOH 1037 B HOH 1003 3 HOH HOH 1003 D HOH 1004 3 HOH HOH 1004 D HOH 1005 3 HOH HOH 1005 D HOH 1020 3 HOH HOH 1020 D HOH 1023 3 HOH HOH 1023 D HOH 1024 3 HOH HOH 1024 D HOH 1025 3 HOH HOH 1025 D HOH 1026 3 HOH HOH 1026 D HOH 1027 3 HOH HOH 1027 D HOH 1028 3 HOH HOH 1028 D HOH 1029 3 HOH HOH 1029 D HOH 1030 3 HOH HOH 1030 D HOH 1034 3 HOH HOH 1034 D HOH 1035 3 HOH HOH 1035 D HOH 1036 3 HOH HOH 1036 D HOH 1008 3 HOH HOH 1008 E HOH 1006 3 HOH HOH 1006 F HOH 1007 3 HOH HOH 1007 F HOH 1009 3 HOH HOH 1009 F HOH 1011 3 HOH HOH 1011 F HOH 1012 3 HOH HOH 1012 F HOH 1013 3 HOH HOH 1013 F HOH 1014 3 HOH HOH 1014 F HOH 1017 3 HOH HOH 1017 F n 1 1 A n 2 2 A n 3 3 A n 4 4 A n 5 5 A n 6 6 A n 7 7 A n 8 8 A n 9 9 A n 10 10 A n 11 11 A THR 12 n 12 THR 12 A LEU 13 n 13 LEU 13 A CYS 14 n 14 CYS 14 A LEU 15 n 15 LEU 15 A GLY 16 n 16 GLY 16 A n 17 17 A n 18 18 A n 19 19 A n 20 20 A n 21 21 A n 22 22 A n 23 23 A n 24 24 A n 25 25 A n 26 26 A n 27 27 A n 1 38 B n 2 39 B SER 40 n 3 SER 40 B THR 41 n 4 THR 41 B GLN 42 n 5 GLN 42 B ALA 43 n 6 ALA 43 B ALA 44 n 7 ALA 44 B ILE 45 n 8 ILE 45 B ASP 46 n 9 ASP 46 B GLN 47 n 10 GLN 47 B ILE 48 n 11 ILE 48 B ASN 49 n 12 ASN 49 B GLY 50 n 13 GLY 50 B LYS 51 n 14 LYS 51 B LEU 52 n 15 LEU 52 B ASN 53 n 16 ASN 53 B ARG 54 n 17 ARG 54 B VAL 55 n 18 VAL 55 B ILE 56 n 19 ILE 56 B GLU 57 n 20 GLU 57 B LYS 58 n 21 LYS 58 B THR 59 n 22 THR 59 B ASN 60 n 23 ASN 60 B GLU 61 n 24 GLU 61 B LYS 62 n 25 LYS 62 B PHE 63 n 26 PHE 63 B HIS 64 n 27 HIS 64 B GLN 65 n 28 GLN 65 B ILE 66 n 29 ILE 66 B GLU 67 n 30 GLU 67 B LYS 68 n 31 LYS 68 B GLU 69 n 32 GLU 69 B PHE 70 n 33 PHE 70 B SER 71 n 34 SER 71 B GLU 72 n 35 GLU 72 B VAL 73 n 36 VAL 73 B GLU 74 n 37 GLU 74 B GLY 75 n 38 GLY 75 B ARG 76 n 39 ARG 76 B ILE 77 n 40 ILE 77 B GLN 78 n 41 GLN 78 B ASP 79 n 42 ASP 79 B LEU 80 n 43 LEU 80 B GLU 81 n 44 GLU 81 B LYS 82 n 45 LYS 82 B TYR 83 n 46 TYR 83 B VAL 84 n 47 VAL 84 B GLU 85 n 48 GLU 85 B ASP 86 n 49 ASP 86 B THR 87 n 50 THR 87 B LYS 88 n 51 LYS 88 B ILE 89 n 52 ILE 89 B ASP 90 n 53 ASP 90 B LEU 91 n 54 LEU 91 B TRP 92 n 55 TRP 92 B SER 93 n 56 SER 93 B TYR 94 n 57 TYR 94 B ASN 95 n 58 ASN 95 B ALA 96 n 59 ALA 96 B GLU 97 n 60 GLU 97 B LEU 98 n 61 LEU 98 B LEU 99 n 62 LEU 99 B VAL 100 n 63 VAL 100 B ALA 101 n 64 ALA 101 B LEU 102 n 65 LEU 102 B GLU 103 n 66 GLU 103 B ASN 104 n 67 ASN 104 B GLN 105 n 68 GLN 105 B HIS 106 n 69 HIS 106 B THR 107 n 70 THR 107 B ILE 108 n 71 ILE 108 B ASP 109 n 72 ASP 109 B LEU 110 n 73 LEU 110 B THR 111 n 74 THR 111 B ASP 112 n 75 ASP 112 B SER 113 n 76 SER 113 B GLU 114 n 77 GLU 114 B MET 115 n 78 MET 115 B ASN 116 n 79 ASN 116 B LYS 117 n 80 LYS 117 B LEU 118 n 81 LEU 118 B PHE 119 n 82 PHE 119 B GLU 120 n 83 GLU 120 B LYS 121 n 84 LYS 121 B THR 122 n 85 THR 122 B ARG 123 n 86 ARG 123 B ARG 124 n 87 ARG 124 B GLN 125 n 88 GLN 125 B LEU 126 n 89 LEU 126 B ARG 127 n 90 ARG 127 B GLU 128 n 91 GLU 128 B ASN 129 n 92 ASN 129 B ALA 130 n 93 ALA 130 B GLU 131 n 94 GLU 131 B GLU 132 n 95 GLU 132 B MET 133 n 96 MET 133 B GLY 134 n 97 GLY 134 B ASN 135 n 98 ASN 135 B GLY 136 n 99 GLY 136 B CYS 137 n 100 CYS 137 B PHE 138 n 101 PHE 138 B LYS 139 n 102 LYS 139 B ILE 140 n 103 ILE 140 B TYR 141 n 104 TYR 141 B HIS 142 n 105 HIS 142 B LYS 143 n 106 LYS 143 B CYS 144 n 107 CYS 144 B ASP 145 n 108 ASP 145 B ASN 146 n 109 ASN 146 B ALA 147 n 110 ALA 147 B CYS 148 n 111 CYS 148 B ILE 149 n 112 ILE 149 B GLU 150 n 113 GLU 150 B SER 151 n 114 SER 151 B ILE 152 n 115 ILE 152 B ARG 153 n 116 ARG 153 B n 117 154 B n 118 155 B n 119 156 B n 120 157 B n 121 158 B n 122 159 B n 123 160 B n 124 161 B n 125 162 B n 126 163 B n 127 164 B n 128 165 B n 129 166 B n 130 167 B n 131 168 B n 132 169 B n 133 170 B n 134 171 B n 135 172 B n 136 173 B n 137 174 B n 138 175 B n 1 1 C n 2 2 C n 3 3 C n 4 4 C n 5 5 C n 6 6 C n 7 7 C n 8 8 C n 9 9 C n 10 10 C ALA 11 n 11 ALA 11 C THR 12 n 12 THR 12 C LEU 13 n 13 LEU 13 C CYS 14 n 14 CYS 14 C LEU 15 n 15 LEU 15 C GLY 16 n 16 GLY 16 C n 17 17 C n 18 18 C n 19 19 C n 20 20 C n 21 21 C n 22 22 C n 23 23 C n 24 24 C n 25 25 C n 26 26 C n 27 27 C n 1 38 D n 2 39 D SER 40 n 3 SER 40 D THR 41 n 4 THR 41 D GLN 42 n 5 GLN 42 D ALA 43 n 6 ALA 43 D ALA 44 n 7 ALA 44 D ILE 45 n 8 ILE 45 D ASP 46 n 9 ASP 46 D GLN 47 n 10 GLN 47 D ILE 48 n 11 ILE 48 D ASN 49 n 12 ASN 49 D GLY 50 n 13 GLY 50 D LYS 51 n 14 LYS 51 D LEU 52 n 15 LEU 52 D ASN 53 n 16 ASN 53 D ARG 54 n 17 ARG 54 D VAL 55 n 18 VAL 55 D ILE 56 n 19 ILE 56 D GLU 57 n 20 GLU 57 D LYS 58 n 21 LYS 58 D THR 59 n 22 THR 59 D ASN 60 n 23 ASN 60 D GLU 61 n 24 GLU 61 D LYS 62 n 25 LYS 62 D PHE 63 n 26 PHE 63 D HIS 64 n 27 HIS 64 D GLN 65 n 28 GLN 65 D ILE 66 n 29 ILE 66 D GLU 67 n 30 GLU 67 D LYS 68 n 31 LYS 68 D GLU 69 n 32 GLU 69 D PHE 70 n 33 PHE 70 D SER 71 n 34 SER 71 D GLU 72 n 35 GLU 72 D VAL 73 n 36 VAL 73 D GLU 74 n 37 GLU 74 D GLY 75 n 38 GLY 75 D ARG 76 n 39 ARG 76 D ILE 77 n 40 ILE 77 D GLN 78 n 41 GLN 78 D ASP 79 n 42 ASP 79 D LEU 80 n 43 LEU 80 D GLU 81 n 44 GLU 81 D LYS 82 n 45 LYS 82 D TYR 83 n 46 TYR 83 D VAL 84 n 47 VAL 84 D GLU 85 n 48 GLU 85 D ASP 86 n 49 ASP 86 D THR 87 n 50 THR 87 D LYS 88 n 51 LYS 88 D ILE 89 n 52 ILE 89 D ASP 90 n 53 ASP 90 D LEU 91 n 54 LEU 91 D TRP 92 n 55 TRP 92 D SER 93 n 56 SER 93 D TYR 94 n 57 TYR 94 D ASN 95 n 58 ASN 95 D ALA 96 n 59 ALA 96 D GLU 97 n 60 GLU 97 D LEU 98 n 61 LEU 98 D LEU 99 n 62 LEU 99 D VAL 100 n 63 VAL 100 D ALA 101 n 64 ALA 101 D LEU 102 n 65 LEU 102 D GLU 103 n 66 GLU 103 D ASN 104 n 67 ASN 104 D GLN 105 n 68 GLN 105 D HIS 106 n 69 HIS 106 D THR 107 n 70 THR 107 D ILE 108 n 71 ILE 108 D ASP 109 n 72 ASP 109 D LEU 110 n 73 LEU 110 D THR 111 n 74 THR 111 D ASP 112 n 75 ASP 112 D SER 113 n 76 SER 113 D GLU 114 n 77 GLU 114 D MET 115 n 78 MET 115 D ASN 116 n 79 ASN 116 D LYS 117 n 80 LYS 117 D LEU 118 n 81 LEU 118 D PHE 119 n 82 PHE 119 D GLU 120 n 83 GLU 120 D LYS 121 n 84 LYS 121 D THR 122 n 85 THR 122 D ARG 123 n 86 ARG 123 D ARG 124 n 87 ARG 124 D GLN 125 n 88 GLN 125 D LEU 126 n 89 LEU 126 D ARG 127 n 90 ARG 127 D GLU 128 n 91 GLU 128 D ASN 129 n 92 ASN 129 D ALA 130 n 93 ALA 130 D GLU 131 n 94 GLU 131 D GLU 132 n 95 GLU 132 D MET 133 n 96 MET 133 D GLY 134 n 97 GLY 134 D ASN 135 n 98 ASN 135 D GLY 136 n 99 GLY 136 D CYS 137 n 100 CYS 137 D PHE 138 n 101 PHE 138 D LYS 139 n 102 LYS 139 D ILE 140 n 103 ILE 140 D TYR 141 n 104 TYR 141 D HIS 142 n 105 HIS 142 D LYS 143 n 106 LYS 143 D CYS 144 n 107 CYS 144 D ASP 145 n 108 ASP 145 D ASN 146 n 109 ASN 146 D ALA 147 n 110 ALA 147 D CYS 148 n 111 CYS 148 D ILE 149 n 112 ILE 149 D GLU 150 n 113 GLU 150 D SER 151 n 114 SER 151 D ILE 152 n 115 ILE 152 D ARG 153 n 116 ARG 153 D ASN 154 n 117 ASN 154 D GLY 155 n 118 GLY 155 D THR 156 n 119 THR 156 D TYR 157 n 120 TYR 157 D ASP 158 n 121 ASP 158 D HIS 159 n 122 HIS 159 D ASP 160 n 123 ASP 160 D VAL 161 n 124 VAL 161 D TYR 162 n 125 TYR 162 D n 126 163 D n 127 164 D n 128 165 D n 129 166 D n 130 167 D n 131 168 D n 132 169 D n 133 170 D n 134 171 D n 135 172 D n 136 173 D n 137 174 D n 138 175 D n 1 1 E n 2 2 E n 3 3 E n 4 4 E n 5 5 E n 6 6 E n 7 7 E n 8 8 E n 9 9 E THR 10 n 10 THR 10 E ALA 11 n 11 ALA 11 E THR 12 n 12 THR 12 E LEU 13 n 13 LEU 13 E CYS 14 n 14 CYS 14 E LEU 15 n 15 LEU 15 E GLY 16 n 16 GLY 16 E HIS 17 n 17 HIS 17 E n 18 18 E n 19 19 E n 20 20 E n 21 21 E n 22 22 E n 23 23 E n 24 24 E n 25 25 E n 26 26 E n 27 27 E n 1 38 F n 2 39 F SER 40 n 3 SER 40 F THR 41 n 4 THR 41 F GLN 42 n 5 GLN 42 F ALA 43 n 6 ALA 43 F ALA 44 n 7 ALA 44 F ILE 45 n 8 ILE 45 F ASP 46 n 9 ASP 46 F GLN 47 n 10 GLN 47 F ILE 48 n 11 ILE 48 F ASN 49 n 12 ASN 49 F GLY 50 n 13 GLY 50 F LYS 51 n 14 LYS 51 F LEU 52 n 15 LEU 52 F ASN 53 n 16 ASN 53 F ARG 54 n 17 ARG 54 F VAL 55 n 18 VAL 55 F ILE 56 n 19 ILE 56 F GLU 57 n 20 GLU 57 F LYS 58 n 21 LYS 58 F THR 59 n 22 THR 59 F ASN 60 n 23 ASN 60 F GLU 61 n 24 GLU 61 F LYS 62 n 25 LYS 62 F PHE 63 n 26 PHE 63 F HIS 64 n 27 HIS 64 F GLN 65 n 28 GLN 65 F ILE 66 n 29 ILE 66 F GLU 67 n 30 GLU 67 F LYS 68 n 31 LYS 68 F GLU 69 n 32 GLU 69 F PHE 70 n 33 PHE 70 F SER 71 n 34 SER 71 F GLU 72 n 35 GLU 72 F VAL 73 n 36 VAL 73 F GLU 74 n 37 GLU 74 F GLY 75 n 38 GLY 75 F ARG 76 n 39 ARG 76 F ILE 77 n 40 ILE 77 F GLN 78 n 41 GLN 78 F ASP 79 n 42 ASP 79 F LEU 80 n 43 LEU 80 F GLU 81 n 44 GLU 81 F LYS 82 n 45 LYS 82 F TYR 83 n 46 TYR 83 F VAL 84 n 47 VAL 84 F GLU 85 n 48 GLU 85 F ASP 86 n 49 ASP 86 F THR 87 n 50 THR 87 F LYS 88 n 51 LYS 88 F ILE 89 n 52 ILE 89 F ASP 90 n 53 ASP 90 F LEU 91 n 54 LEU 91 F TRP 92 n 55 TRP 92 F SER 93 n 56 SER 93 F TYR 94 n 57 TYR 94 F ASN 95 n 58 ASN 95 F ALA 96 n 59 ALA 96 F GLU 97 n 60 GLU 97 F LEU 98 n 61 LEU 98 F LEU 99 n 62 LEU 99 F VAL 100 n 63 VAL 100 F ALA 101 n 64 ALA 101 F LEU 102 n 65 LEU 102 F GLU 103 n 66 GLU 103 F ASN 104 n 67 ASN 104 F GLN 105 n 68 GLN 105 F HIS 106 n 69 HIS 106 F THR 107 n 70 THR 107 F ILE 108 n 71 ILE 108 F ASP 109 n 72 ASP 109 F LEU 110 n 73 LEU 110 F THR 111 n 74 THR 111 F ASP 112 n 75 ASP 112 F SER 113 n 76 SER 113 F GLU 114 n 77 GLU 114 F MET 115 n 78 MET 115 F ASN 116 n 79 ASN 116 F LYS 117 n 80 LYS 117 F LEU 118 n 81 LEU 118 F PHE 119 n 82 PHE 119 F GLU 120 n 83 GLU 120 F LYS 121 n 84 LYS 121 F THR 122 n 85 THR 122 F ARG 123 n 86 ARG 123 F ARG 124 n 87 ARG 124 F GLN 125 n 88 GLN 125 F LEU 126 n 89 LEU 126 F ARG 127 n 90 ARG 127 F GLU 128 n 91 GLU 128 F ASN 129 n 92 ASN 129 F ALA 130 n 93 ALA 130 F GLU 131 n 94 GLU 131 F GLU 132 n 95 GLU 132 F MET 133 n 96 MET 133 F GLY 134 n 97 GLY 134 F ASN 135 n 98 ASN 135 F GLY 136 n 99 GLY 136 F CYS 137 n 100 CYS 137 F PHE 138 n 101 PHE 138 F LYS 139 n 102 LYS 139 F ILE 140 n 103 ILE 140 F TYR 141 n 104 TYR 141 F HIS 142 n 105 HIS 142 F LYS 143 n 106 LYS 143 F CYS 144 n 107 CYS 144 F ASP 145 n 108 ASP 145 F ASN 146 n 109 ASN 146 F ALA 147 n 110 ALA 147 F CYS 148 n 111 CYS 148 F ILE 149 n 112 ILE 149 F GLU 150 n 113 GLU 150 F SER 151 n 114 SER 151 F ILE 152 n 115 ILE 152 F ARG 153 n 116 ARG 153 F ASN 154 n 117 ASN 154 F GLY 155 n 118 GLY 155 F THR 156 n 119 THR 156 F TYR 157 n 120 TYR 157 F ASP 158 n 121 ASP 158 F HIS 159 n 122 HIS 159 F ASP 160 n 123 ASP 160 F VAL 161 n 124 VAL 161 F TYR 162 n 125 TYR 162 F n 126 163 F n 127 164 F n 128 165 F n 129 166 F n 130 167 F n 131 168 F n 132 169 F n 133 170 F n 134 171 F n 135 172 F n 136 173 F n 137 174 F n 138 175 F author_and_software_defined_assembly PISA 6 hexameric 12090 -93 18880 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 N LEU 13 A N LEU 13 B O PHE 138 B O PHE 101 B N LYS 139 B N LYS 102 B O GLU 131 B O GLU 94 C N LEU 13 C N LEU 13 D O PHE 138 D O PHE 101 D N LYS 139 D N LYS 102 D O GLU 131 D O GLU 94 E N LEU 13 E N LEU 13 F O PHE 138 F O PHE 101 F N LYS 139 F N LYS 102 F O GLU 131 F O GLU 94 1 A GLN 1 A GLN 1 1 Y 1 A ASP 2 A ASP 2 1 Y 1 A LEU 3 A LEU 3 1 Y 1 A PRO 4 A PRO 4 1 Y 1 A GLY 5 A GLY 5 1 Y 1 A ASN 6 A ASN 6 1 Y 1 A ASP 7 A ASP 7 1 Y 1 A ASN 8 A ASN 8 1 Y 1 A SER 9 A SER 9 1 Y 1 A THR 10 A THR 10 1 Y 1 A ALA 11 A ALA 11 1 Y 1 A HIS 17 A HIS 17 1 Y 1 A HIS 18 A HIS 18 1 Y 1 A ALA 19 A ALA 19 1 Y 1 A VAL 20 A VAL 20 1 Y 1 A PRO 21 A PRO 21 1 Y 1 A ASN 22 A ASN 22 1 Y 1 A GLY 23 A GLY 23 1 Y 1 A THR 24 A THR 24 1 Y 1 A LEU 25 A LEU 25 1 Y 1 A VAL 26 A VAL 26 1 Y 1 A LYS 27 A LYS 27 1 Y 1 B LEU 38 B LEU 1 1 Y 1 B LYS 39 B LYS 2 1 Y 1 B ASN 154 B ASN 117 1 Y 1 B GLY 155 B GLY 118 1 Y 1 B THR 156 B THR 119 1 Y 1 B TYR 157 B TYR 120 1 Y 1 B ASP 158 B ASP 121 1 Y 1 B HIS 159 B HIS 122 1 Y 1 B ASP 160 B ASP 123 1 Y 1 B VAL 161 B VAL 124 1 Y 1 B TYR 162 B TYR 125 1 Y 1 B ARG 163 B ARG 126 1 Y 1 B ASP 164 B ASP 127 1 Y 1 B GLU 165 B GLU 128 1 Y 1 B ALA 166 B ALA 129 1 Y 1 B LEU 167 B LEU 130 1 Y 1 B ASN 168 B ASN 131 1 Y 1 B ASN 169 B ASN 132 1 Y 1 B ARG 170 B ARG 133 1 Y 1 B PHE 171 B PHE 134 1 Y 1 B GLN 172 B GLN 135 1 Y 1 B ILE 173 B ILE 136 1 Y 1 B LYS 174 B LYS 137 1 Y 1 B GLY 175 B GLY 138 1 Y 1 C GLN 1 C GLN 1 1 Y 1 C ASP 2 C ASP 2 1 Y 1 C LEU 3 C LEU 3 1 Y 1 C PRO 4 C PRO 4 1 Y 1 C GLY 5 C GLY 5 1 Y 1 C ASN 6 C ASN 6 1 Y 1 C ASP 7 C ASP 7 1 Y 1 C ASN 8 C ASN 8 1 Y 1 C SER 9 C SER 9 1 Y 1 C THR 10 C THR 10 1 Y 1 C HIS 17 C HIS 17 1 Y 1 C HIS 18 C HIS 18 1 Y 1 C ALA 19 C ALA 19 1 Y 1 C VAL 20 C VAL 20 1 Y 1 C PRO 21 C PRO 21 1 Y 1 C ASN 22 C ASN 22 1 Y 1 C GLY 23 C GLY 23 1 Y 1 C THR 24 C THR 24 1 Y 1 C LEU 25 C LEU 25 1 Y 1 C VAL 26 C VAL 26 1 Y 1 C LYS 27 C LYS 27 1 Y 1 D LEU 38 D LEU 1 1 Y 1 D LYS 39 D LYS 2 1 Y 1 D ARG 163 D ARG 126 1 Y 1 D ASP 164 D ASP 127 1 Y 1 D GLU 165 D GLU 128 1 Y 1 D ALA 166 D ALA 129 1 Y 1 D LEU 167 D LEU 130 1 Y 1 D ASN 168 D ASN 131 1 Y 1 D ASN 169 D ASN 132 1 Y 1 D ARG 170 D ARG 133 1 Y 1 D PHE 171 D PHE 134 1 Y 1 D GLN 172 D GLN 135 1 Y 1 D ILE 173 D ILE 136 1 Y 1 D LYS 174 D LYS 137 1 Y 1 D GLY 175 D GLY 138 1 Y 1 E GLN 1 E GLN 1 1 Y 1 E ASP 2 E ASP 2 1 Y 1 E LEU 3 E LEU 3 1 Y 1 E PRO 4 E PRO 4 1 Y 1 E GLY 5 E GLY 5 1 Y 1 E ASN 6 E ASN 6 1 Y 1 E ASP 7 E ASP 7 1 Y 1 E ASN 8 E ASN 8 1 Y 1 E SER 9 E SER 9 1 Y 1 E HIS 18 E HIS 18 1 Y 1 E ALA 19 E ALA 19 1 Y 1 E VAL 20 E VAL 20 1 Y 1 E PRO 21 E PRO 21 1 Y 1 E ASN 22 E ASN 22 1 Y 1 E GLY 23 E GLY 23 1 Y 1 E THR 24 E THR 24 1 Y 1 E LEU 25 E LEU 25 1 Y 1 E VAL 26 E VAL 26 1 Y 1 E LYS 27 E LYS 27 1 Y 1 F LEU 38 F LEU 1 1 Y 1 F LYS 39 F LYS 2 1 Y 1 F ARG 163 F ARG 126 1 Y 1 F ASP 164 F ASP 127 1 Y 1 F GLU 165 F GLU 128 1 Y 1 F ALA 166 F ALA 129 1 Y 1 F LEU 167 F LEU 130 1 Y 1 F ASN 168 F ASN 131 1 Y 1 F ASN 169 F ASN 132 1 Y 1 F ARG 170 F ARG 133 1 Y 1 F PHE 171 F PHE 134 1 Y 1 F GLN 172 F GLN 135 1 Y 1 F ILE 173 F ILE 136 1 Y 1 F LYS 174 F LYS 137 1 Y 1 F GLY 175 F GLY 138 1 Y 1 B TYR 94 0.068 SIDE CHAIN 1 B B CB CG GLU GLU 57 57 0.118 0.019 1.517 1.635 N 1 B B CG CD GLU GLU 57 57 0.108 0.015 1.515 1.623 N 1 D D CG CD GLU GLU 61 61 0.105 0.015 1.515 1.620 N 1 A LEU 15 -99.78 -156.32 1 B LYS 117 -52.12 -73.22 1 B MET 133 -85.06 -142.83 1 B ASN 135 -17.30 119.12 1 C LEU 13 176.59 124.87 1 C LEU 15 -97.05 -130.75 1 D ASN 104 -68.66 25.79 1 D LEU 110 -58.64 3.37 1 D SER 113 -46.86 -74.11 1 D GLN 125 -38.97 -38.68 1 D GLU 128 -39.73 -31.19 1 D GLU 132 -68.63 79.49 1 D ASP 145 -66.22 -174.02 1 E LEU 15 179.75 92.43 1 F LEU 110 -66.71 11.54 1 F ASN 129 -91.99 36.24 1 F ASP 158 -66.33 85.09 0.291 0.222 0.222 2.5 1 2.5 37 3129 0 0 3092 0.015 2.17 2.5 6.0 1HTM 27793 2.0 1 81.05 model building X-PLOR refinement X-PLOR phasing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disulf 2.049 A CYS 14 A SG CYS 14 1_555 B CYS 137 B SG CYS 100 1_555 disulf 2.060 B CYS 144 B SG CYS 107 1_555 B CYS 148 B SG CYS 111 1_555 disulf 2.036 C CYS 14 C SG CYS 14 1_555 D CYS 137 D SG CYS 100 1_555 disulf 2.056 D CYS 144 D SG CYS 107 1_555 D CYS 148 D SG CYS 111 1_555 disulf 2.048 E CYS 14 E SG CYS 14 1_555 F CYS 137 F SG CYS 100 1_555 disulf 2.061 F CYS 144 F SG CYS 107 1_555 F CYS 148 F SG CYS 111 1_555 VIRAL PROTEIN INFLUENZA VIRUS HEMAGGLUTININ, Viral protein given 0.112200 0.102600 -0.988400 0.992100 0.045300 0.117400 0.056800 -0.993700 -0.096700 52.91440 5.41200 73.16270 given 0.049600 0.998800 -0.003200 0.189300 -0.012800 -0.981600 -0.980900 0.047600 -0.189600 -12.04600 66.21650 64.94020 HEMA_IAAIC UNP 1 17 P03437 HEMA_IAAIC UNP 2 383 P03437 17 43 1HTM 1 27 P03437 A 1 1 27 383 520 1HTM 38 175 P03437 B 2 1 138 17 43 1HTM 1 27 P03437 C 1 1 27 383 520 1HTM 38 175 P03437 D 2 1 138 17 43 1HTM 1 27 P03437 E 1 1 27 383 520 1HTM 38 175 P03437 F 2 1 138 3 3 3 anti-parallel anti-parallel anti-parallel anti-parallel anti-parallel anti-parallel A LEU 13 A LEU 13 A CYS 14 A CYS 14 B CYS 137 B CYS 100 B LYS 139 B LYS 102 B GLU 131 B GLU 94 B GLU 132 B GLU 95 C ALA 11 C ALA 11 C CYS 14 C CYS 14 D CYS 137 D CYS 100 D ILE 140 D ILE 103 D GLU 131 D GLU 94 D GLU 132 D GLU 95 E THR 12 E THR 12 E CYS 14 E CYS 14 F CYS 137 F CYS 100 F LYS 139 F LYS 102 F GLU 131 F GLU 94 F MET 133 F MET 96 20 C 2 2 21