HEADER    SIGNALING PROTEIN                       03-APR-00   1EQ8              
TITLE     THREE-DIMENSIONAL STRUCTURE OF THE PENTAMERIC HELICAL BUNDLE OF THE   
TITLE    2 ACETYLCHOLINE RECEPTOR M2 TRANSMEMBRANE SEGMENT                      
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: ACETYLCHOLINE RECEPTOR PROTEIN;                            
COMPND   3 CHAIN: A, B, C, D, E;                                                
COMPND   4 FRAGMENT: M2 SEGMENT;                                                
COMPND   5 SYNONYM: ACHR M2;                                                    
COMPND   6 ENGINEERED: YES                                                      
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: TORPEDO CALIFORNICA;                            
SOURCE   3 ORGANISM_COMMON: PACIFIC ELECTRIC RAY;                               
SOURCE   4 ORGANISM_TAXID: 7787;                                                
SOURCE   5 ORGAN: BRAIN;                                                        
SOURCE   6 CELL: NEURON;                                                        
SOURCE   7 CELLULAR_LOCATION: POST-SYNAPTIC MEMBRANE;                           
SOURCE   8 EXPRESSION_SYSTEM: ESCHERICHIA COLI BL21;                            
SOURCE   9 EXPRESSION_SYSTEM_TAXID: 511693;                                     
SOURCE  10 EXPRESSION_SYSTEM_STRAIN: BL21;                                      
SOURCE  11 EXPRESSION_SYSTEM_PLASMID: PMAL                                      
KEYWDS    NEUROTRANSMITTER RECEPTOR, M2, LIPID BILAYERS, ION-CHANNEL, HELICAL   
KEYWDS   2 BUNDLE, PENTAMERIC BUNDLE, SIGNALING PROTEIN                         
EXPDTA    SOLID-STATE NMR                                                       
AUTHOR    F.M.MARASSI,J.J.GESELL,Y.KIM,A.P.VALENTE,M.OBLATT-MONTAL,M.MONTAL,    
AUTHOR   2 S.J.OPELLA                                                           
REVDAT   4   25-SEP-24 1EQ8    1       COMPND REMARK HET    HETNAM              
REVDAT   4 2                   1       FORMUL HELIX  LINK   SITE                
REVDAT   4 3                   1       ATOM                                     
REVDAT   3   16-FEB-22 1EQ8    1       REMARK LINK                              
REVDAT   2   24-FEB-09 1EQ8    1       VERSN                                    
REVDAT   1   26-APR-00 1EQ8    0                                                
JRNL        AUTH   S.J.OPELLA,F.M.MARASSI,J.J.GESELL,A.P.VALENTE,Y.KIM,         
JRNL        AUTH 2 M.OBLATT-MONTAL,M.MONTAL                                     
JRNL        TITL   STRUCTURES OF THE M2 CHANNEL-LINING SEGMENTS FROM NICOTINIC  
JRNL        TITL 2 ACETYLCHOLINE AND NMDA RECEPTORS BY NMR SPECTROSCOPY.        
JRNL        REF    NAT.STRUCT.BIOL.              V.   6   374 1999              
JRNL        REFN                   ISSN 1072-8368                               
JRNL        PMID   10201407                                                     
JRNL        DOI    10.1038/7610                                                 
REMARK   1                                                                      
REMARK   1 REFERENCE 1                                                          
REMARK   1  AUTH   F.M.MARASSI,J.J.GESELL,A.P.VALENTE,Y.KIM,M.OBLATT-MONTAL,    
REMARK   1  AUTH 2 M.MONTAL,S.J.OPELLA                                          
REMARK   1  TITL   DILUTE SPIN-EXCHANGE ASSIGNMENT OF SOLID-STATE NMR SPECTRA   
REMARK   1  TITL 2 OF ORIENTED PROTEINS: ACETYLCHOLINE M2 IN BILAYERS           
REMARK   1  REF    J.BIOMOL.NMR                  V.  14   141 1999              
REMARK   1  REFN                   ISSN 0925-2738                               
REMARK   1  DOI    10.1023/A:1008391823293                                      
REMARK   2                                                                      
REMARK   2 RESOLUTION. NOT APPLICABLE.                                          
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : X-PLOR 3.01                                          
REMARK   3   AUTHORS     : BRUNGER                                              
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: THE BACKBONE COORDINATES OBTAINED FROM    
REMARK   3  SOLUTION NMR WERE SUPERIMPOSED ON THE COORDINATES OBTAINED FROM     
REMARK   3  SOLID-STATE NMR TO FIX THE HELIX ORIENTATION AND ROTATION IN THE    
REMARK   3  MEMBRANE. THE PENTAMERIC ARRAY WAS THEN OPTIMIZED USING             
REMARK   3  MOLECULAR DYNAMICS. PORE CONTOURS WERE CALCULATED WITH THE          
REMARK   3  PROGRAM HOLE.                                                       
REMARK   4                                                                      
REMARK   4 1EQ8 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 07-APR-00.                  
REMARK 100 THE DEPOSITION ID IS D_1000010812.                                   
REMARK 210                                                                      
REMARK 210 EXPERIMENTAL DETAILS                                                 
REMARK 210  EXPERIMENT TYPE                : NMR                                
REMARK 210  TEMPERATURE           (KELVIN) : 303; 298                           
REMARK 210  PH                             : 5.5; 5.5                           
REMARK 210  IONIC STRENGTH                 : NULL; NULL                         
REMARK 210  PRESSURE                       : AMBIENT; AMBIENT                   
REMARK 210  SAMPLE CONTENTS                : 1MM M2 U-15N; 350MM DPC; PH5.5;;   
REMARK 210                                   20MG M2 U-15N; 40MG DMPC;          
REMARK 210                                                                      
REMARK 210  NMR EXPERIMENTS CONDUCTED      : HSQC; HNCA; HNCOCA; 3D 15N- AND    
REMARK 210                                   13C-EDITED NOESY; 3D 15N- AND      
REMARK 210                                   13C-EDITED TOCSY; 3D HNHA; 1D      
REMARK 210                                   CPMOIST; 2D 1H/1H-15N PISEMA; 2D   
REMARK 210                                   1H/15N HETCOR;                     
REMARK 210  SPECTROMETER FIELD STRENGTH    : 750 MHZ; 600 MHZ; 400 MHZ          
REMARK 210  SPECTROMETER MODEL             : DMX; CMX                           
REMARK 210  SPECTROMETER MANUFACTURER      : BRUKER; CHEMAGNETICS               
REMARK 210                                                                      
REMARK 210  STRUCTURE DETERMINATION.                                            
REMARK 210   SOFTWARE USED                 : FISI 1.01, HOLE, FELIX 95          
REMARK 210   METHOD USED                   : X-PLOR 3.1, DISTANCE GEOMETRY,     
REMARK 210                                   SIMULATED ANNEALING, MOLECULAR     
REMARK 210                                   DYNAMICS, FISI, FINGERPRINT, HOLE  
REMARK 210                                                                      
REMARK 210 CONFORMERS, NUMBER CALCULATED   : 30                                 
REMARK 210 CONFORMERS, NUMBER SUBMITTED    : 1                                  
REMARK 210 CONFORMERS, SELECTION CRITERIA  : STRUCTURES WITH FAVORABLE NON      
REMARK 210                                   -BOND ENERGY                       
REMARK 210                                                                      
REMARK 210 BEST REPRESENTATIVE CONFORMER IN THIS ENSEMBLE : NULL                
REMARK 210                                                                      
REMARK 210 REMARK: THE ORIENTATION OF EACH MONOMER IN THE PENTAMERIC BUNDLE     
REMARK 210  WAS OBTAINED FROM THE COMBINATION OF THE SOLUTION NMR (PDB FILE     
REMARK 210  1A11) AND SOLID-STATE NMR (PDB FILE 1CEK) STRUCTURES                
REMARK 217                                                                      
REMARK 217 SOLID STATE NMR STUDY                                                
REMARK 217 THE COORDINATES IN THIS ENTRY WERE GENERATED FROM SOLID              
REMARK 217 STATE NMR DATA. PROTEIN DATA BANK CONVENTIONS REQUIRE THAT           
REMARK 217 CRYST1 AND SCALE RECORDS BE INCLUDED, BUT THE VALUES ON              
REMARK 217 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: PENTAMERIC                        
REMARK 350 APPLY THE FOLLOWING TO CHAINS: A, B, C, D, E                         
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 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: COVALENT BOND LENGTHS                                      
REMARK 500                                                                      
REMARK 500 THE STEREOCHEMICAL PARAMETERS OF THE FOLLOWING RESIDUES              
REMARK 500 HAVE VALUES WHICH DEVIATE FROM EXPECTED VALUES BY MORE               
REMARK 500 THAN 6*RMSD (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN               
REMARK 500 IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                 
REMARK 500                                                                      
REMARK 500 STANDARD TABLE:                                                      
REMARK 500 FORMAT: (10X,I3,1X,2(A3,1X,A1,I4,A1,1X,A4,3X),1X,F6.3)               
REMARK 500                                                                      
REMARK 500 EXPECTED VALUES PROTEIN: ENGH AND HUBER, 1999                        
REMARK 500 EXPECTED VALUES NUCLEIC ACID: CLOWNEY ET AL 1996                     
REMARK 500                                                                      
REMARK 500  M RES CSSEQI ATM1   RES CSSEQI ATM2   DEVIATION                     
REMARK 500    ARG E  23   C     ARG E  23   O       0.150                       
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: COVALENT BOND ANGLES                                       
REMARK 500                                                                      
REMARK 500 THE STEREOCHEMICAL PARAMETERS OF THE FOLLOWING RESIDUES              
REMARK 500 HAVE VALUES WHICH DEVIATE FROM EXPECTED VALUES BY MORE               
REMARK 500 THAN 6*RMSD (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN               
REMARK 500 IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                 
REMARK 500                                                                      
REMARK 500 STANDARD TABLE:                                                      
REMARK 500 FORMAT: (10X,I3,1X,A3,1X,A1,I4,A1,3(1X,A4,2X),12X,F5.1)              
REMARK 500                                                                      
REMARK 500 EXPECTED VALUES PROTEIN: ENGH AND HUBER, 1999                        
REMARK 500 EXPECTED VALUES NUCLEIC ACID: CLOWNEY ET AL 1996                     
REMARK 500                                                                      
REMARK 500  M RES CSSEQI ATM1   ATM2   ATM3                                     
REMARK 500    ARG A  23   NE  -  CZ  -  NH1 ANGL. DEV. =   3.8 DEGREES          
REMARK 500    ARG B  23   NE  -  CZ  -  NH1 ANGL. DEV. =   3.8 DEGREES          
REMARK 500    ARG C  23   NE  -  CZ  -  NH1 ANGL. DEV. =   3.8 DEGREES          
REMARK 500    ARG D  23   NE  -  CZ  -  NH1 ANGL. DEV. =   3.8 DEGREES          
REMARK 500    ARG E  23   NE  -  CZ  -  NH1 ANGL. DEV. =   3.8 DEGREES          
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 1A11   RELATED DB: PDB                                   
REMARK 900 SOLUTION NMR COORDINATES OF THE MONOMERIC ACHR M2 HELIX              
REMARK 900 RELATED ID: 1CEK   RELATED DB: PDB                                   
REMARK 900 SOLID-STATE NMR COORDINATES OF THE MONOMERIC ACHR M2 HELIX IN THE    
REMARK 900 MEMBRANE                                                             
DBREF  1EQ8 A    1    23  UNP    P02718   ACHD_TORCA     276    298             
DBREF  1EQ8 B    1    23  UNP    P02718   ACHD_TORCA     276    298             
DBREF  1EQ8 C    1    23  UNP    P02718   ACHD_TORCA     276    298             
DBREF  1EQ8 D    1    23  UNP    P02718   ACHD_TORCA     276    298             
DBREF  1EQ8 E    1    23  UNP    P02718   ACHD_TORCA     276    298             
SEQRES   1 A   23  GLU LYS MET SER THR ALA ILE SER VAL LEU LEU ALA GLN          
SEQRES   2 A   23  ALA VAL PHE LEU LEU LEU THR SER GLN ARG                      
SEQRES   1 B   23  GLU LYS MET SER THR ALA ILE SER VAL LEU LEU ALA GLN          
SEQRES   2 B   23  ALA VAL PHE LEU LEU LEU THR SER GLN ARG                      
SEQRES   1 C   23  GLU LYS MET SER THR ALA ILE SER VAL LEU LEU ALA GLN          
SEQRES   2 C   23  ALA VAL PHE LEU LEU LEU THR SER GLN ARG                      
SEQRES   1 D   23  GLU LYS MET SER THR ALA ILE SER VAL LEU LEU ALA GLN          
SEQRES   2 D   23  ALA VAL PHE LEU LEU LEU THR SER GLN ARG                      
SEQRES   1 E   23  GLU LYS MET SER THR ALA ILE SER VAL LEU LEU ALA GLN          
SEQRES   2 E   23  ALA VAL PHE LEU LEU LEU THR SER GLN ARG                      
HELIX    1   1 GLU A    1  ARG A   23  1                                  23    
HELIX    2   2 GLU B    1  ARG B   23  1                                  23    
HELIX    3   3 GLU C    1  ARG C   23  1                                  23    
HELIX    4   4 GLU D    1  ARG D   23  1                                  23    
CRYST1    1.000    1.000    1.000  90.00  90.00  90.00 P 1           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