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 \ TER 35 GLN A 119 \ TER 70 GLN B 119 \ ATOM 71 CA LEU C 86 21.088 -0.576 -20.296 1.00 0.00 C \ ATOM 72 CA TRP C 87 21.072 -0.312 -16.432 1.00 0.00 C \ ATOM 73 CA GLY C 88 20.064 3.424 -16.128 1.00 0.00 C \ ATOM 74 CA ARG C 89 16.404 2.392 -16.860 1.00 0.00 C \ ATOM 75 CA CYS C 90 16.676 -0.308 -14.128 1.00 0.00 C \ ATOM 76 CA VAL C 91 17.828 2.436 -11.660 1.00 0.00 C \ ATOM 77 CA ALA C 92 14.824 4.488 -12.908 1.00 0.00 C \ ATOM 78 CA VAL C 93 12.436 1.532 -12.116 1.00 0.00 C \ ATOM 79 CA VAL C 94 14.060 1.176 -8.612 1.00 0.00 C \ ATOM 80 CA VAL C 95 13.644 4.900 -7.680 1.00 0.00 C \ ATOM 81 CA MET C 96 10.116 4.832 -9.256 1.00 0.00 C \ ATOM 82 CA VAL C 97 8.900 1.880 -7.068 1.00 0.00 C \ ATOM 83 CA ALA C 98 10.680 3.388 -4.000 1.00 0.00 C \ ATOM 84 CA GLY C 99 8.920 6.752 -4.716 1.00 0.00 C \ ATOM 85 CA ILE C 100 5.492 5.088 -5.372 1.00 0.00 C \ ATOM 86 CA THR C 101 5.888 3.148 -2.064 1.00 0.00 C \ ATOM 87 CA SER C 102 7.048 6.296 -0.148 1.00 0.00 C \ ATOM 88 CA PHE C 103 4.204 8.592 -1.416 1.00 0.00 C \ ATOM 89 CA GLY C 104 1.712 5.764 -0.664 1.00 0.00 C \ ATOM 90 CA LEU C 105 3.140 5.416 2.844 1.00 0.00 C \ ATOM 91 CA VAL C 106 4.208 8.796 4.352 1.00 0.00 C \ ATOM 92 CA THR C 107 0.360 8.912 4.440 1.00 0.00 C \ ATOM 93 CA ALA C 108 0.132 5.460 6.200 1.00 0.00 C \ ATOM 94 CA ALA C 109 -0.364 6.852 9.724 1.00 0.00 C \ ATOM 95 CA LEU C 110 -3.176 9.348 8.804 1.00 0.00 C \ ATOM 96 CA ALA C 111 -6.068 6.900 8.068 1.00 0.00 C \ ATOM 97 CA THR C 112 -5.008 4.292 10.736 1.00 0.00 C \ ATOM 98 CA TRP C 113 -4.692 7.256 13.192 1.00 0.00 C \ ATOM 99 CA PHE C 114 -8.228 8.304 11.976 1.00 0.00 C \ ATOM 100 CA VAL C 115 -9.616 4.756 12.708 1.00 0.00 C \ ATOM 101 CA GLY C 116 -8.040 5.432 16.168 1.00 0.00 C \ ATOM 102 CA ARG C 117 -11.320 7.488 16.624 1.00 0.00 C \ ATOM 103 CA GLU C 118 -13.520 4.388 17.116 1.00 0.00 C \ ATOM 104 CA GLN C 119 -13.920 6.224 20.552 1.00 0.00 C \ TER 105 GLN C 119 \ TER 140 GLN D 119 \ ENDMDL \ """, "1jq2chainC") cmd.hide("all") cmd.color('grey70', "1jq2chainC") cmd.show('cartoon', "1jq2chainC") cmd.center("1jq2chainC", state=0, origin=1) cmd.zoom("1jq2chainC", animate=-1) cmd.select("e1jq2C1", "c. 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