cmd.read_pdbstr("""\ HEADER MEMBRANE PROTEIN 03-AUG-01 1JQ2 \ TITLE POTASSIUM CHANNEL (KCSA) OPEN GATE MODEL \ COMPND MOL_ID: 1; \ COMPND 2 MOLECULE: VOLTAGE-GATED POTASSIUM CHANNEL; \ COMPND 3 CHAIN: A, B, C, D; \ COMPND 4 FRAGMENT: INNER TRANSMEMBRANE SEGMENT (RESIDUES 86-119); \ COMPND 5 ENGINEERED: YES \ SOURCE MOL_ID: 1; \ SOURCE 2 ORGANISM_SCIENTIFIC: STREPTOMYCES LIVIDANS; \ SOURCE 3 ORGANISM_TAXID: 1916; \ SOURCE 4 EXPRESSION_SYSTEM: ESCHERICHIA COLI; \ SOURCE 5 EXPRESSION_SYSTEM_TAXID: 562; \ SOURCE 6 EXPRESSION_SYSTEM_STRAIN: XL-2 BLUE; \ SOURCE 7 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID; \ SOURCE 8 EXPRESSION_SYSTEM_PLASMID: PQE32 \ KEYWDS POTASSIUM CHANNEL, INTEGRAL MEMBRANE PROTEIN, OPEN STATE, MEMBRANE \ KEYWDS 2 PROTEIN \ EXPDTA SOLUTION NMR \ NUMMDL 50 \ MDLTYP CA ATOMS ONLY, CHAIN A, B, C, D \ AUTHOR Y.-S.LIU,P.SOMPORNPISUT,E.PEROZO \ REVDAT 5 22-MAY-24 1JQ2 1 REMARK \ REVDAT 4 27-OCT-21 1JQ2 1 REMARK SEQADV \ REVDAT 3 24-FEB-09 1JQ2 1 VERSN \ REVDAT 2 01-APR-03 1JQ2 1 JRNL \ REVDAT 1 03-OCT-01 1JQ2 0 \ JRNL AUTH Y.S.LIU,P.SOMPORNPISUT,E.PEROZO \ JRNL TITL STRUCTURE OF THE KCSA CHANNEL INTRACELLULAR GATE IN THE OPEN \ JRNL TITL 2 STATE. \ JRNL REF NAT.STRUCT.BIOL. V. 8 883 2001 \ JRNL REFN ISSN 1072-8368 \ JRNL PMID 11573095 \ JRNL DOI 10.1038/NSB1001-883 \ REMARK 1 \ REMARK 1 REFERENCE 1 \ REMARK 1 AUTH P.SOMPORNPISUT,Y.-S.LIU,E.PEROZO \ REMARK 1 TITL CALCULATION OF RIGID BODY CONFORMATIONAL CHANGES USING \ REMARK 1 TITL 2 RESTRAINT-DRIVEN CARTESIAN TRANSFORMATIONS \ REMARK 1 REF TO BE PUBLISHED \ REMARK 1 REFN \ REMARK 1 REFERENCE 2 \ REMARK 1 AUTH E.PEROZO,D.M.CORTES,L.G.CUELLO \ REMARK 1 TITL STRUCTURAL REARRANGEMENTS UNDERLYING K+-CHANNEL ACTIVATION \ REMARK 1 TITL 2 GATING \ REMARK 1 REF SCIENCE V. 285 73 1999 \ REMARK 1 REFN ISSN 0036-8075 \ REMARK 1 DOI 10.1126/SCIENCE.285.5424.73 \ REMARK 1 REFERENCE 3 \ REMARK 1 AUTH D.A.DOYLE,J.MORAIS CABRAL,R.A.PFUETZNER,A.KUO,J.M.GULBIS, \ REMARK 1 AUTH 2 S.L.COHEN,B.T.CHAIT,R.MACKINNON \ REMARK 1 TITL THE STRUCTURE OF THE POTASSIUM CHANNEL: MOLECULAR BASIS OF \ REMARK 1 TITL 2 K+ CONDUCTION AND SELECTIVITY \ REMARK 1 REF SCIENCE V. 280 69 1998 \ REMARK 1 REFN ISSN 0036-8075 \ REMARK 1 DOI 10.1126/SCIENCE.280.5360.69 \ REMARK 2 \ REMARK 2 RESOLUTION. NOT APPLICABLE. \ REMARK 3 \ REMARK 3 REFINEMENT. \ REMARK 3 PROGRAM : AMBER 6.0 \ REMARK 3 AUTHORS : D.A.CASE ET AL. \ REMARK 3 \ REMARK 3 OTHER REFINEMENT REMARKS: \ REMARK 3 THE STRUCTURE ARE BASED ON: 1) TEN PAIRS OF INTER-SUBUNIT \ REMARK 3 DISTANCES FOR THE KCSA INNER \ REMARK 3 HELICAL BUNDLE IN THE CLOSED AND THE OPEN STATES AND 2) THE USE OF \ REMARK 3 THE CRYSTAL STRUCTURE \ REMARK 3 AS THE CHANNEL IN THE CLOSED STATE, AND AS THE REFERENCE \ REMARK 3 STRUCTURE. THE COMPUTER PROGRAM \ REMARK 3 REDCAT SEARCHES (RESTRAINT-DRIVEN CARTESIAN TRANSFORMATION) BASED \ REMARK 3 ON THE EXHAUSTIVE SAMPLING \ REMARK 3 OF RIGID-BODY MOVEMENT IN CARTESIAN SPACE FOR THE TM2 INNER BUNDLE \ REMARK 3 IN THE OPEN STATE WERE \ REMARK 3 ALLOWED TO CONVERGE TO A MINIMAL PENALTY VALUE. THE ENSEMBLE OF \ REMARK 3 THE 50 LOWEST PENALTY \ REMARK 3 CONFORMERS WAS SUBJECTED TO MOLECULAR MECHANIC ENERGY \ REMARK 3 MINIMIZATION. FINAL REFINEMENT WAS \ REMARK 3 PERFORMED ON THE AVERAGE OPEN HELICAL BUNDLE BY ENERGY \ REMARK 3 MINIMIZATION. \ REMARK 4 \ REMARK 4 1JQ2 COMPLIES WITH FORMAT V. 3.15, 01-DEC-08 \ REMARK 99 \ REMARK 99 THE STRUCTURE CONTAINS ONLY ALPHA-CARBONS BECAUSE \ REMARK 99 THE EXPERIMENTAL DATA USED TO CALCULATE THE STRUCTURES \ REMARK 99 ARE GOOD ENOUGH ONLY TO THE BACKBONE LEVEL. \ REMARK 100 \ REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 20-AUG-01. \ REMARK 100 THE DEPOSITION ID IS D_1000014054. \ REMARK 210 \ REMARK 210 EXPERIMENTAL DETAILS \ REMARK 210 EXPERIMENT TYPE : NMR \ REMARK 210 TEMPERATURE (KELVIN) : 150.0; 150.0 \ REMARK 210 PH : 7.0; 4.0 \ REMARK 210 IONIC STRENGTH : 20 MM CITRATE PHOSPHATE; 20 MM \ REMARK 210 CITRATE PHOSPHATE \ REMARK 210 PRESSURE : 1 ATM; 1 ATM \ REMARK 210 SAMPLE CONTENTS : 1.0 MG/ML MIXED WITH \ REMARK 210 METHANETHIOSULFONATE SPIN LABEL \ REMARK 210 \ REMARK 210 NMR EXPERIMENTS CONDUCTED : CONTINUOUS WAVE EPR \ REMARK 210 SPECTROMETER FIELD STRENGTH : 3400 MHZ \ REMARK 210 SPECTROMETER MODEL : EMX \ REMARK 210 SPECTROMETER MANUFACTURER : BRUKER \ REMARK 210 \ REMARK 210 STRUCTURE DETERMINATION. \ REMARK 210 SOFTWARE USED : EPR AQUISIT 2.32, REDCAT \ REMARK 210 METHOD USED : FOURIER DECONVOLUTION, \ REMARK 210 CONFORMATIONAL GRID SEARCH A \ REMARK 210 CARTESAIN REPRESENTATION \ REMARK 210 MOLECULAR MECHANIC ENERGY \ REMARK 210 MINIMIZATION \ REMARK 210 \ REMARK 210 CONFORMERS, NUMBER CALCULATED : 50 \ REMARK 210 CONFORMERS, NUMBER SUBMITTED : 50 \ REMARK 210 CONFORMERS, SELECTION CRITERIA : STRUCTURES WITH THE LOWEST \ REMARK 210 PENALTY \ REMARK 210 \ REMARK 210 BEST REPRESENTATIVE CONFORMER IN THIS ENSEMBLE : NULL \ REMARK 210 \ REMARK 210 REMARK: NULL \ REMARK 215 \ REMARK 215 NMR STUDY \ REMARK 215 THE COORDINATES IN THIS ENTRY WERE GENERATED FROM SOLUTION \ REMARK 215 NMR DATA. PROTEIN DATA BANK CONVENTIONS REQUIRE THAT \ REMARK 215 CRYST1 AND SCALE RECORDS BE INCLUDED, BUT THE VALUES ON \ REMARK 215 THESE RECORDS ARE MEANINGLESS. \ REMARK 300 \ REMARK 300 BIOMOLECULE: 1 \ REMARK 300 SEE REMARK 350 FOR THE AUTHOR PROVIDED AND/OR PROGRAM \ REMARK 300 GENERATED ASSEMBLY INFORMATION FOR THE STRUCTURE IN \ REMARK 300 THIS ENTRY. THE REMARK MAY ALSO PROVIDE INFORMATION ON \ REMARK 300 BURIED SURFACE AREA. \ REMARK 350 \ REMARK 350 COORDINATES FOR A COMPLETE MULTIMER REPRESENTING THE KNOWN \ REMARK 350 BIOLOGICALLY SIGNIFICANT OLIGOMERIZATION STATE OF THE \ REMARK 350 MOLECULE CAN BE GENERATED BY APPLYING BIOMT TRANSFORMATIONS \ REMARK 350 GIVEN BELOW. BOTH NON-CRYSTALLOGRAPHIC AND \ REMARK 350 CRYSTALLOGRAPHIC OPERATIONS ARE GIVEN. \ REMARK 350 \ REMARK 350 BIOMOLECULE: 1 \ REMARK 350 AUTHOR DETERMINED BIOLOGICAL UNIT: TETRAMERIC \ REMARK 350 APPLY THE FOLLOWING TO CHAINS: A, B, C, D \ REMARK 350 BIOMT1 1 1.000000 0.000000 0.000000 0.00000 \ REMARK 350 BIOMT2 1 0.000000 1.000000 0.000000 0.00000 \ REMARK 350 BIOMT3 1 0.000000 0.000000 1.000000 0.00000 \ REMARK 900 \ REMARK 900 RELATED ENTRIES \ REMARK 900 RELATED ID: 1JQ1 RELATED DB: PDB \ REMARK 900 1JQ1 CONTAINS THE MINIMIZED AVERAGE STRUCTURE \ DBREF 1JQ2 A 86 119 UNP P0A334 KCSA_STRLI 86 119 \ DBREF 1JQ2 B 86 119 UNP P0A334 KCSA_STRLI 86 119 \ DBREF 1JQ2 C 86 119 UNP P0A334 KCSA_STRLI 86 119 \ DBREF 1JQ2 D 86 119 UNP P0A334 KCSA_STRLI 86 119 \ SEQADV 1JQ2 CYS A 90 UNP P0A334 LEU 90 ENGINEERED MUTATION \ SEQADV 1JQ2 CYS B 90 UNP P0A334 LEU 90 ENGINEERED MUTATION \ SEQADV 1JQ2 CYS C 90 UNP P0A334 LEU 90 ENGINEERED MUTATION \ SEQADV 1JQ2 CYS D 90 UNP P0A334 LEU 90 ENGINEERED MUTATION \ SEQRES 1 A 34 LEU TRP GLY ARG CYS VAL ALA VAL VAL VAL MET VAL ALA \ SEQRES 2 A 34 GLY ILE THR SER PHE GLY LEU VAL THR ALA ALA LEU ALA \ SEQRES 3 A 34 THR TRP PHE VAL GLY ARG GLU GLN \ SEQRES 1 B 34 LEU TRP GLY ARG CYS VAL ALA VAL VAL VAL MET VAL ALA \ SEQRES 2 B 34 GLY ILE THR SER PHE GLY LEU VAL THR ALA ALA LEU ALA \ SEQRES 3 B 34 THR TRP PHE VAL GLY ARG GLU GLN \ SEQRES 1 C 34 LEU TRP GLY ARG CYS VAL ALA VAL VAL VAL MET VAL ALA \ SEQRES 2 C 34 GLY ILE THR SER PHE GLY LEU VAL THR ALA ALA LEU ALA \ SEQRES 3 C 34 THR TRP PHE VAL GLY ARG GLU GLN \ SEQRES 1 D 34 LEU TRP GLY ARG CYS VAL ALA VAL VAL VAL MET VAL ALA \ SEQRES 2 D 34 GLY ILE THR SER PHE GLY LEU VAL THR ALA ALA LEU ALA \ SEQRES 3 D 34 THR TRP PHE VAL GLY ARG GLU GLN \ CRYST1 1.000 1.000 1.000 90.00 90.00 90.00 1 \ ORIGX1 1.000000 0.000000 0.000000 0.00000 \ ORIGX2 0.000000 1.000000 0.000000 0.00000 \ ORIGX3 0.000000 0.000000 1.000000 0.00000 \ SCALE1 1.000000 0.000000 0.000000 0.00000 \ SCALE2 0.000000 1.000000 0.000000 0.00000 \ SCALE3 0.000000 0.000000 1.000000 0.00000 \ MODEL 1 \ ATOM 1 CA LEU A 86 -20.728 0.648 -20.328 1.00 0.00 C \ ATOM 2 CA TRP A 87 -20.792 0.380 -16.464 1.00 0.00 C \ ATOM 3 CA GLY A 88 -19.784 -3.356 -16.136 1.00 0.00 C \ ATOM 4 CA ARG A 89 -16.112 -2.324 -16.792 1.00 0.00 C \ ATOM 5 CA CYS A 90 -16.432 0.364 -14.048 1.00 0.00 C \ ATOM 6 CA VAL A 91 -17.628 -2.392 -11.620 1.00 0.00 C \ ATOM 7 CA ALA A 92 -14.600 -4.444 -12.816 1.00 0.00 C \ ATOM 8 CA VAL A 93 -12.208 -1.508 -11.960 1.00 0.00 C \ ATOM 9 CA VAL A 94 -13.892 -1.168 -8.488 1.00 0.00 C \ ATOM 10 CA VAL A 95 -13.528 -4.904 -7.576 1.00 0.00 C \ ATOM 11 CA MET A 96 -9.956 -4.872 -9.052 1.00 0.00 C \ ATOM 12 CA VAL A 97 -8.728 -1.948 -6.836 1.00 0.00 C \ ATOM 13 CA ALA A 98 -10.652 -3.388 -3.836 1.00 0.00 C \ ATOM 14 CA GLY A 99 -8.984 -6.828 -4.428 1.00 0.00 C \ ATOM 15 CA ILE A 100 -5.468 -5.292 -4.888 1.00 0.00 C \ ATOM 16 CA THR A 101 -5.848 -3.212 -1.660 1.00 0.00 C \ ATOM 17 CA SER A 102 -7.444 -6.156 0.264 1.00 0.00 C \ ATOM 18 CA PHE A 103 -4.760 -8.816 -0.524 1.00 0.00 C \ ATOM 19 CA GLY A 104 -2.092 -6.140 0.068 1.00 0.00 C \ ATOM 20 CA LEU A 105 -3.792 -5.696 3.480 1.00 0.00 C \ ATOM 21 CA VAL A 106 -4.048 -9.448 4.348 1.00 0.00 C \ ATOM 22 CA THR A 107 -0.220 -9.148 4.108 1.00 0.00 C \ ATOM 23 CA ALA A 108 0.012 -5.632 5.712 1.00 0.00 C \ ATOM 24 CA ALA A 109 0.000 -6.528 9.444 1.00 0.00 C \ ATOM 25 CA LEU A 110 2.964 -8.968 9.092 1.00 0.00 C \ ATOM 26 CA ALA A 111 5.608 -6.240 8.448 1.00 0.00 C \ ATOM 27 CA THR A 112 4.616 -4.004 11.444 1.00 0.00 C \ ATOM 28 CA TRP A 113 4.240 -7.228 13.536 1.00 0.00 C \ ATOM 29 CA PHE A 114 7.828 -8.192 12.436 1.00 0.00 C \ ATOM 30 CA VAL A 115 9.192 -4.676 13.328 1.00 0.00 C \ ATOM 31 CA GLY A 116 7.640 -5.464 16.772 1.00 0.00 C \ ATOM 32 CA ARG A 117 10.944 -7.492 17.100 1.00 0.00 C \ ATOM 33 CA GLU A 118 12.896 -4.284 17.748 1.00 0.00 C \ ATOM 34 CA GLN A 119 12.972 -6.232 21.140 1.00 0.00 C \ TER 35 GLN A 119 \ TER 70 GLN B 119 \ TER 105 GLN C 119 \ TER 140 GLN D 119 \ ENDMDL \ """, "1jq2chainA") cmd.hide("all") cmd.color('grey70', "1jq2chainA") cmd.show('cartoon', "1jq2chainA") cmd.center("1jq2chainA", state=0, origin=1) cmd.zoom("1jq2chainA", animate=-1) cmd.select("e1jq2A1", "c. 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