1LXF - Header Asymmetric Unit

HEADER METAL BINDING PROTEIN, PROTEIN BINDING 05-JUN-02 1LXF

TITLE STRUCTURE OF THE REGULATORY N-DOMAIN OF HUMAN CARDIAC TITLE 2 TROPONIN C IN COMPLEX WITH HUMAN CARDIAC TROPONIN-I(147- TITLE 3 163) AND BEPRIDIL

COMPND MOL_ID: 1; COMPND 2 MOLECULE: TROPONIN C, SLOW SKELETAL AND CARDIAC MUSCLES; COMPND 3 CHAIN: C; COMPND 4 FRAGMENT: REGULATORY N DOMAIN (RESIDUES 1-89); COMPND 5 SYNONYM: CARDIAC TROPONIN C, TN-C; COMPND 6 ENGINEERED: YES; COMPND 7 MOL_ID: 2; COMPND 8 MOLECULE: TROPONIN I, CARDIAC MUSCLE; COMPND 9 CHAIN: I; COMPND 10 FRAGMENT: SWITCH PEPTIDE (RESIDUES 147-163); COMPND 11 ENGINEERED: YES

SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: HOMO SAPIENS; SOURCE 3 ORGANISM_COMMON: HUMAN; SOURCE 4 ORGANISM_TAXID: 9606; SOURCE 5 GENE: TNNC; SOURCE 6 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 7 EXPRESSION_SYSTEM_TAXID: 562; SOURCE 8 EXPRESSION_SYSTEM_STRAIN: BL21-(DE3PLYSS); SOURCE 9 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID; SOURCE 10 EXPRESSION_SYSTEM_PLASMID: PET-3A; SOURCE 11 MOL_ID: 2; SOURCE 12 SYNTHETIC: YES; SOURCE 13 OTHER_DETAILS: THE SEQUENCE OF THE PROTEIN IS NATURALLY SOURCE 14 FOUND IN HOMO SAPIENS. THE PROTEIN WAS CHEMICALLY SOURCE 15 SYNTHESIZED.

KEYWDS MUSCLE, CARDIAC TROPONIN C-DRUG INTERACTION, BEPRIDIL, KEYWDS 2 CARDIAC TROPONIN I-DRUG INTERACTION, METAL BINDING PROTEIN, KEYWDS 3 PROTEIN BINDING

EXPDTA SOLUTION NMR

NUMMDL 30

AUTHOR X.WANG,M.X.LI,B.D.SYKES

REVDAT 2 24-FEB-09 1LXF 1 VERSN REVDAT 1 11-DEC-02 1LXF 0

JRNL AUTH X.WANG,M.X.LI,B.D.SYKES JRNL TITL STRUCTURE OF THE REGULATORY N-DOMAIN OF HUMAN JRNL TITL 2 CARDIAC TROPONIN C IN COMPLEX WITH HUMAN CARDIAC JRNL TITL 3 TROPONIN I147-163 AND BEPRIDIL. JRNL REF J.BIOL.CHEM. V. 277 31124 2002 JRNL REFN ISSN 0021-9258 JRNL PMID 12060657 JRNL DOI 10.1074/JBC.M203896200

REMARK 1

REMARK 2 REMARK 2 RESOLUTION. NOT APPLICABLE.

REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : X-PLOR 3.85 REMARK 3 AUTHORS : BRUNGER REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: A TOTAL OF 1169 NOE RESTRAINTS, 88 REMARK 3 DIHEDRAL ANGLE RESTRAINTS USED FOR THE REFINEMENT OF CNTNC, 30 REMARK 3 NOE RESTRAINTS USED BETWEEN CNTNC AND CTNI147-163, 28 NOE REMARK 3 RESTRAINTS USED BETWEEN CNTNC AND BEPRIDIL, 24 INTRAMOLECULAR REMARK 3 NOE RESTRAINTS AND 12 DIHEDRAL ANGLE RESTRAINTS USED WITHIN REMARK 3 CTNI147-163.

REMARK 4 REMARK 4 1LXF COMPLIES WITH FORMAT V. 3.15, 01-DEC-08

REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 24-JUN-02. REMARK 100 THE RCSB ID CODE IS RCSB016377.

REMARK 210 REMARK 210 EXPERIMENTAL DETAILS REMARK 210 EXPERIMENT TYPE : NMR REMARK 210 TEMPERATURE (KELVIN) : 303 REMARK 210 PH : 6.7 REMARK 210 IONIC STRENGTH : 0.1 REMARK 210 PRESSURE : AMBIENT REMARK 210 SAMPLE CONTENTS : 1MM CNTNC, 3MM CTNI147-163, REMARK 210 1.5MM BEPRIDIL, 5MM DTT, 100MM REMARK 210 KCL, 10MM IMDZ, TRACE AMOUNT REMARK 210 OF NAN3, 50UM DSS, 90% H2O, REMARK 210 10% D2O REMARK 210 REMARK 210 NMR EXPERIMENTS CONDUCTED : 3D_15N-SEPARATED_NOESY, 3D_ REMARK 210 15N-SEPARATED_DIPSI, HCCH- REMARK 210 TOCSY, 3D_13C,15N-SEPARATED- REMARK 210 NOESY, CBCACONNH, HNCACB, 2D_ REMARK 210 13C, 15N-FILTERED NOESY, 2D_ REMARK 210 13C, 15N-FILTERED DIPSI, 3D_ REMARK 210 13C, 15N-FILTERED, EDITED NOESY REMARK 210 SPECTROMETER FIELD STRENGTH : 500 MHZ, 600 MHZ, 800 MHZ REMARK 210 SPECTROMETER MODEL : UNITY INOVA, UNITY, UNITYPLUS REMARK 210 SPECTROMETER MANUFACTURER : VARIAN REMARK 210 REMARK 210 STRUCTURE DETERMINATION. REMARK 210 SOFTWARE USED : NMRPIPE 2.1, NMRVIEW 5.0.4 REMARK 210 METHOD USED : SIMULATED ANNEALING REMARK 210 REMARK 210 CONFORMERS, NUMBER CALCULATED : 30 REMARK 210 CONFORMERS, NUMBER SUBMITTED : 30 REMARK 210 CONFORMERS, SELECTION CRITERIA : ALL CALCULATED STRUCTURES REMARK 210 SUBMITTED REMARK 210 REMARK 210 BEST REPRESENTATIVE CONFORMER IN THIS ENSEMBLE : 1 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 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: TORSION ANGLES REMARK 500 REMARK 500 TORSION ANGLES OUTSIDE THE EXPECTED RAMACHANDRAN REGIONS: REMARK 500 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER; REMARK 500 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE). REMARK 500 REMARK 500 STANDARD TABLE: REMARK 500 FORMAT:(10X,I3,1X,A3,1X,A1,I4,A1,4X,F7.2,3X,F7.2) REMARK 500 REMARK 500 EXPECTED VALUES: GJ KLEYWEGT AND TA JONES (1996). PHI/PSI- REMARK 500 CHOLOGY: RAMACHANDRAN REVISITED. STRUCTURE 4, 1395 - 1400 REMARK 500 REMARK 500 M RES CSSEQI PSI PHI REMARK 500 1 GLU C 15 -75.59 -70.18 REMARK 500 1 ASP C 33 -91.86 -110.76 REMARK 500 1 ASP C 73 -165.18 -61.22 REMARK 500 1 ASP C 75 -77.35 -87.38 REMARK 500 1 PHE C 77 -74.22 -54.72 REMARK 500 1 ASP C 87 65.59 164.48 REMARK 500 1 ALA I 150 -52.47 83.79 REMARK 500 2 ASP C 2 -44.22 173.89 REMARK 500 2 ASP C 33 -90.24 -118.88 REMARK 500 2 LYS C 43 -74.36 -41.11 REMARK 500 2 ASN C 51 79.97 -114.56 REMARK 500 2 ASP C 73 -172.11 -55.04 REMARK 500 2 ASP C 75 -77.51 -89.24 REMARK 500 3 ASP C 2 -35.58 167.16 REMARK 500 3 GLU C 15 -72.28 -80.21 REMARK 500 3 ALA C 22 -70.68 -40.79 REMARK 500 3 ASP C 33 -81.27 -168.59 REMARK 500 3 ASP C 65 63.46 -67.99 REMARK 500 3 ASP C 73 -170.65 -55.52 REMARK 500 3 ASP C 75 -74.76 -110.72 REMARK 500 3 PHE C 77 -71.48 -59.35 REMARK 500 3 MET C 80 -39.24 -37.50 REMARK 500 3 ASP C 88 130.82 -37.41 REMARK 500 3 ALA I 150 -35.14 164.73 REMARK 500 3 LEU I 157 64.94 -118.59 REMARK 500 3 LEU I 158 64.00 -105.70 REMARK 500 3 ARG I 161 38.20 -146.27 REMARK 500 4 LEU C 12 152.96 -42.98 REMARK 500 4 GLU C 15 -74.72 -58.44 REMARK 500 4 GLU C 19 -39.01 -37.72 REMARK 500 4 ASP C 33 -83.08 -120.18 REMARK 500 4 LEU C 48 43.26 -108.64 REMARK 500 4 ASP C 73 -177.66 -48.96 REMARK 500 4 PHE C 77 -77.37 -37.87 REMARK 500 4 LEU C 78 -72.21 -34.08 REMARK 500 4 ASP C 87 53.45 -157.61 REMARK 500 4 ASP C 88 99.16 -41.76 REMARK 500 4 SER I 149 -70.87 -69.11 REMARK 500 4 ALA I 150 -28.47 157.41 REMARK 500 4 ALA I 160 -50.65 84.22 REMARK 500 4 ARG I 161 -44.86 -162.00 REMARK 500 5 ILE C 4 -31.89 -39.96 REMARK 500 5 GLU C 14 -34.64 -38.69 REMARK 500 5 ASN C 18 -72.69 -62.23 REMARK 500 5 GLU C 19 -30.02 -38.82 REMARK 500 5 ILE C 26 -67.93 -108.48 REMARK 500 5 ASP C 33 -76.45 -129.87 REMARK 500 5 THR C 38 -31.05 -38.82 REMARK 500 5 LEU C 48 -85.27 -96.90 REMARK 500 5 ASP C 75 -82.02 -81.23 REMARK 500 5 MET C 80 -70.33 -38.01 REMARK 500 5 VAL C 82 -29.12 -39.04 REMARK 500 5 ASP C 87 -164.30 175.23 REMARK 500 5 ALA I 150 -10.53 84.11 REMARK 500 5 LEU I 157 40.14 -97.19 REMARK 500 6 ASP C 2 66.41 -108.47 REMARK 500 6 ASP C 33 -89.82 -133.94 REMARK 500 6 ILE C 36 74.53 -101.70 REMARK 500 6 ASP C 75 -76.14 -105.61 REMARK 500 6 PHE C 77 -78.85 -54.74 REMARK 500 6 ASP C 87 77.09 -154.80 REMARK 500 6 ALA I 150 -5.94 83.10 REMARK 500 6 ALA I 160 -72.94 -168.47 REMARK 500 7 ASN C 18 -71.56 -45.86 REMARK 500 7 ASP C 33 -69.65 -156.31 REMARK 500 7 ASP C 65 59.88 -69.70 REMARK 500 7 ASP C 73 -156.54 -68.79 REMARK 500 7 ASP C 75 -80.85 -82.69 REMARK 500 7 LEU C 78 -77.32 -54.73 REMARK 500 7 VAL C 79 -36.45 -35.94 REMARK 500 7 ARG C 83 -33.46 -37.46 REMARK 500 7 ASP C 87 36.91 179.51 REMARK 500 7 ASP C 88 140.96 -39.62 REMARK 500 7 SER I 149 -89.92 -61.97 REMARK 500 7 ALA I 150 -24.30 159.72 REMARK 500 7 LEU I 157 65.94 -158.91 REMARK 500 7 ALA I 160 -72.50 -60.61 REMARK 500 8 ASP C 2 -42.84 87.74 REMARK 500 8 ILE C 4 -32.07 -37.98 REMARK 500 8 ASN C 18 -76.89 -60.45 REMARK 500 8 GLU C 19 -30.34 -39.50 REMARK 500 8 ASP C 33 -88.77 -160.91 REMARK 500 8 ASP C 73 -168.42 -61.16 REMARK 500 8 ASP C 75 -77.61 -104.56 REMARK 500 8 PHE C 77 -81.66 -56.17 REMARK 500 8 ASP C 87 96.23 72.91 REMARK 500 8 ASP C 88 156.23 -41.53 REMARK 500 8 SER I 149 -61.37 -96.89 REMARK 500 8 ALA I 150 -33.10 175.31 REMARK 500 9 GLU C 15 -76.67 -75.46 REMARK 500 9 ASN C 18 -73.87 -73.24 REMARK 500 9 GLU C 19 -34.75 -37.75 REMARK 500 9 ALA C 31 178.17 -54.75 REMARK 500 9 GLU C 32 -82.81 -100.17 REMARK 500 9 ASP C 33 -92.46 -43.27 REMARK 500 9 LEU C 48 -73.79 -75.78 REMARK 500 9 PRO C 52 -166.94 -79.39 REMARK 500 9 ASP C 73 -170.77 -54.38 REMARK 500 9 ASP C 75 -79.35 -98.30 REMARK 500 9 ILE I 148 -74.97 68.59 REMARK 500 9 SER I 149 -90.33 43.89 REMARK 500 9 ALA I 150 -50.64 161.53 REMARK 500 9 MET I 154 -37.36 -37.13 REMARK 500 9 LEU I 158 -79.33 -67.35 REMARK 500 9 ALA I 160 -88.90 61.73 REMARK 500 9 ALA I 162 85.26 51.69 REMARK 500 10 GLU C 15 -74.88 -61.21 REMARK 500 10 LEU C 29 117.96 -39.43 REMARK 500 10 ASP C 33 -69.86 -108.83 REMARK 500 10 LEU C 48 -86.68 -47.36 REMARK 500 10 ASP C 73 -173.11 -49.12 REMARK 500 10 ASP C 75 -82.81 -102.21 REMARK 500 10 PHE C 77 -70.52 -50.44 REMARK 500 10 MET C 85 -38.47 -38.00 REMARK 500 10 ASP C 87 153.72 69.21 REMARK 500 10 ASP C 88 109.98 -56.78 REMARK 500 10 SER I 149 -39.34 87.64 REMARK 500 10 ALA I 150 -7.52 84.38 REMARK 500 10 ALA I 160 62.46 -162.77 REMARK 500 10 ARG I 161 -42.10 -166.08 REMARK 500 10 ALA I 162 173.64 162.91 REMARK 500 11 ASP C 2 50.91 -101.76 REMARK 500 11 ILE C 4 -34.14 -38.69 REMARK 500 11 GLU C 15 -72.27 -49.60 REMARK 500 11 GLU C 19 -34.07 -38.52 REMARK 500 11 VAL C 28 46.10 -146.25 REMARK 500 11 GLU C 32 -71.08 -77.32 REMARK 500 11 SER C 37 -167.49 -127.69 REMARK 500 11 ASP C 73 -168.61 -68.85 REMARK 500 11 LYS C 86 -61.03 -101.44 REMARK 500 11 ASP C 87 50.79 -102.62 REMARK 500 11 ASP C 88 138.70 -37.38 REMARK 500 11 ILE I 148 45.48 -88.93 REMARK 500 11 ALA I 150 -4.74 84.90 REMARK 500 11 ALA I 162 82.11 161.16 REMARK 500 12 GLU C 14 -30.40 -37.74 REMARK 500 12 GLU C 15 -74.87 -59.81 REMARK 500 12 GLU C 32 -69.21 -100.36 REMARK 500 12 ASP C 33 -65.85 -101.03 REMARK 500 12 ASP C 73 -170.23 -55.12 REMARK 500 12 ASP C 75 -72.77 -71.11 REMARK 500 12 PHE C 77 -87.61 -43.01 REMARK 500 12 ASP C 88 100.82 -46.79 REMARK 500 12 LEU I 157 41.13 -105.74 REMARK 500 12 ALA I 160 105.21 -57.04 REMARK 500 13 ASP C 2 99.81 -66.10 REMARK 500 13 GLU C 15 -72.09 -69.27 REMARK 500 13 ALA C 31 175.17 -59.30 REMARK 500 13 GLU C 32 -77.84 -91.42 REMARK 500 13 ASP C 33 -89.35 -63.64 REMARK 500 13 LEU C 48 -81.65 -113.60 REMARK 500 13 ASP C 73 -170.52 -60.89 REMARK 500 13 PHE C 77 -71.98 -37.58 REMARK 500 13 LEU C 78 -76.94 -37.81 REMARK 500 13 LYS C 86 -69.25 -97.34 REMARK 500 13 ASP C 87 70.84 -112.24 REMARK 500 13 ASP C 88 87.14 -52.80 REMARK 500 13 ALA I 150 -25.65 87.36 REMARK 500 13 ALA I 162 121.58 60.64 REMARK 500 14 GLU C 14 -30.41 -39.56 REMARK 500 14 GLU C 15 -72.53 -59.40 REMARK 500 14 ASP C 33 -90.98 -135.51 REMARK 500 14 THR C 38 -35.02 -39.84 REMARK 500 14 LYS C 39 -72.20 -79.45 REMARK 500 14 ASP C 73 -177.54 -51.29 REMARK 500 14 ASP C 75 -83.00 -89.16 REMARK 500 14 ASP C 87 97.28 176.20 REMARK 500 14 LEU I 157 -72.24 -120.41 REMARK 500 15 LEU C 12 165.62 -44.04 REMARK 500 15 GLU C 15 -77.95 -53.33 REMARK 500 15 ASN C 18 -73.45 -62.50 REMARK 500 15 GLU C 19 -36.00 -39.83 REMARK 500 15 ASP C 33 -84.88 -107.64 REMARK 500 15 PHE C 77 -74.80 -50.07 REMARK 500 15 ILE I 148 31.95 37.73 REMARK 500 15 LEU I 157 45.93 -148.33 REMARK 500 15 ALA I 162 -65.47 -165.48 REMARK 500 16 ASP C 3 -70.22 -46.98 REMARK 500 16 ILE C 4 -32.34 -37.89 REMARK 500 16 LEU C 12 153.15 -46.42 REMARK 500 16 ASN C 18 -72.44 -83.25 REMARK 500 16 ASP C 33 -77.74 -97.73 REMARK 500 16 ASP C 75 -80.32 -91.10 REMARK 500 16 PHE C 77 -75.02 -51.99 REMARK 500 16 MET C 85 -31.73 -36.52 REMARK 500 16 ASP C 87 71.31 76.92 REMARK 500 16 ILE I 148 103.53 62.95 REMARK 500 16 ALA I 150 -13.10 84.26 REMARK 500 16 MET I 154 -34.34 -38.14 REMARK 500 16 ALA I 162 -54.93 -168.79 REMARK 500 17 ASP C 2 61.07 178.86 REMARK 500 17 ILE C 4 -30.79 -39.85 REMARK 500 17 GLU C 15 -71.81 -51.09 REMARK 500 17 LYS C 17 -37.80 -38.58 REMARK 500 17 ASN C 18 -72.68 -66.37 REMARK 500 17 ALA C 31 178.20 -58.49 REMARK 500 17 ASP C 33 -83.75 -105.00 REMARK 500 17 LEU C 48 -71.71 -121.58 REMARK 500 17 PRO C 52 -165.68 -79.95 REMARK 500 17 ASP C 73 -169.27 -60.02 REMARK 500 17 ASP C 75 -74.83 -102.82 REMARK 500 17 PHE C 77 -89.10 -55.99 REMARK 500 17 ASP C 87 76.14 -154.82 REMARK 500 17 ALA I 150 -43.52 87.62 REMARK 500 17 ALA I 160 84.58 65.62 REMARK 500 17 ALA I 162 -73.60 -70.80 REMARK 500 18 ASP C 2 59.33 -111.66 REMARK 500 18 LEU C 12 167.07 -42.63 REMARK 500 18 GLU C 15 -74.17 -60.07 REMARK 500 18 ASN C 18 -72.24 -70.63 REMARK 500 18 GLU C 19 -35.87 -38.86 REMARK 500 18 ALA C 31 -176.73 -53.31 REMARK 500 18 ASP C 33 -87.64 -137.33 REMARK 500 18 ASP C 73 -173.39 -54.62 REMARK 500 18 ASP C 75 -75.69 -98.53 REMARK 500 18 ASP C 87 119.28 -165.07 REMARK 500 18 ALA I 150 -16.76 86.50 REMARK 500 18 LEU I 157 -78.97 -88.36 REMARK 500 18 LEU I 158 -85.35 60.02 REMARK 500 18 ALA I 160 -63.36 66.05 REMARK 500 19 GLU C 15 -70.31 -67.74 REMARK 500 19 LYS C 17 -38.26 -37.78 REMARK 500 19 ASP C 33 -81.14 -131.88 REMARK 500 19 LEU C 48 -83.28 -45.07 REMARK 500 19 ASP C 73 -163.22 -70.13 REMARK 500 19 ASP C 75 -83.95 -101.67 REMARK 500 19 ASP C 88 166.62 -41.50 REMARK 500 19 ALA I 150 -53.07 81.39 REMARK 500 19 MET I 154 -32.12 -37.05 REMARK 500 19 LEU I 157 -77.71 -72.50 REMARK 500 19 ARG I 161 -71.65 -177.53 REMARK 500 20 ASP C 2 -162.65 -58.88 REMARK 500 20 GLU C 19 -39.95 -37.51 REMARK 500 20 ASP C 33 -93.88 -134.14 REMARK 500 20 ASN C 51 78.80 -115.27 REMARK 500 20 ASP C 73 -178.04 -48.92 REMARK 500 20 PHE C 77 -78.59 -37.91 REMARK 500 20 LEU C 78 -72.91 -34.00 REMARK 500 20 ASP C 87 60.57 -156.63 REMARK 500 20 ALA I 150 -6.98 85.77 REMARK 500 20 LEU I 157 34.74 -150.53 REMARK 500 20 ALA I 160 -60.22 -172.69 REMARK 500 20 ALA I 162 -169.00 -170.52 REMARK 500 21 ASP C 2 -37.49 173.80 REMARK 500 21 ASN C 18 -72.41 -64.35 REMARK 500 21 GLU C 19 -33.57 -39.01 REMARK 500 21 ASP C 33 -86.42 -113.04 REMARK 500 21 SER C 37 -163.04 -128.32 REMARK 500 21 ASP C 73 -172.57 -56.15 REMARK 500 21 ASP C 75 -71.37 -103.21 REMARK 500 21 VAL C 82 -32.60 -39.09 REMARK 500 21 ARG C 83 -75.08 -57.95 REMARK 500 21 ASP C 87 92.70 -162.73 REMARK 500 21 LEU I 158 88.87 -52.88 REMARK 500 21 ALA I 160 -63.94 67.96 REMARK 500 21 ARG I 161 -71.49 -87.55 REMARK 500 22 ASP C 33 -88.35 -126.30 REMARK 500 22 LEU C 48 -71.17 -82.08 REMARK 500 22 ASP C 65 52.41 -93.66 REMARK 500 22 ASP C 73 -173.35 -52.94 REMARK 500 22 ASP C 75 -79.67 -95.32 REMARK 500 22 PHE C 77 -80.32 -49.31 REMARK 500 22 ASP C 87 111.05 65.71 REMARK 500 22 ASP C 88 100.66 -59.85 REMARK 500 22 ILE I 148 37.18 37.38 REMARK 500 22 LEU I 157 38.79 -92.80 REMARK 500 22 ALA I 162 111.73 58.60 REMARK 500 23 ASP C 2 26.96 -146.45 REMARK 500 23 GLU C 15 -76.77 -49.78 REMARK 500 23 VAL C 28 27.14 -144.53 REMARK 500 23 ALA C 31 -169.94 -51.83 REMARK 500 23 ASP C 33 -81.47 -142.85 REMARK 500 23 ILE C 36 75.74 -101.79 REMARK 500 23 ASP C 73 -164.06 -54.47 REMARK 500 23 MET C 80 -36.23 -34.58 REMARK 500 23 ASP C 87 63.22 -118.15 REMARK 500 23 ASP C 88 175.87 -55.99 REMARK 500 23 SER I 149 -50.23 174.41 REMARK 500 23 ALA I 150 -48.97 -176.69 REMARK 500 23 LEU I 157 66.39 -158.76 REMARK 500 23 ALA I 160 -78.47 -42.40 REMARK 500 24 ASP C 2 68.83 -100.21 REMARK 500 24 GLU C 14 -37.87 -37.75 REMARK 500 24 ASP C 33 -85.80 -125.52 REMARK 500 24 ASP C 75 -82.26 -100.62 REMARK 500 24 PHE C 77 -77.33 -65.21 REMARK 500 24 ARG C 83 -76.68 -58.74 REMARK 500 24 MET C 85 -72.90 -40.89 REMARK 500 24 ASP C 88 102.69 -48.67 REMARK 500 24 ALA I 150 -13.27 83.80 REMARK 500 24 ARG I 161 70.32 46.16 REMARK 500 25 ASP C 2 39.99 -89.99 REMARK 500 25 ILE C 4 -33.23 -37.41 REMARK 500 25 LYS C 6 -36.05 -38.08 REMARK 500 25 ASN C 18 -74.01 -51.91 REMARK 500 25 ILE C 26 -66.92 -106.07 REMARK 500 25 ALA C 31 168.84 -41.23 REMARK 500 25 ASP C 33 -90.55 -105.92 REMARK 500 25 ASP C 73 -179.38 -69.43 REMARK 500 25 ASP C 75 -86.01 -72.50 REMARK 500 25 PHE C 77 -72.27 -53.01 REMARK 500 25 ARG I 161 75.51 39.07 REMARK 500 25 ALA I 162 60.94 -166.98 REMARK 500 26 GLU C 15 -73.04 -55.42 REMARK 500 26 VAL C 28 35.07 -140.21 REMARK 500 26 ASP C 33 -90.45 -116.12 REMARK 500 26 LEU C 48 -77.64 -54.72 REMARK 500 26 ASP C 65 60.61 -67.69 REMARK 500 26 ASP C 73 -166.66 -60.49 REMARK 500 26 ASP C 75 -80.65 -57.47 REMARK 500 26 VAL C 79 -37.91 -38.03 REMARK 500 26 LEU I 158 62.66 -67.57 REMARK 500 26 ALA I 160 -72.76 67.25 REMARK 500 26 ARG I 161 56.10 -90.97 REMARK 500 27 GLU C 15 -71.13 -57.66 REMARK 500 27 ASP C 33 -90.60 -140.05 REMARK 500 27 LEU C 48 -72.65 -84.38 REMARK 500 27 ASP C 73 -170.64 -55.29 REMARK 500 27 ASP C 75 -83.54 -90.36 REMARK 500 27 PHE C 77 -75.92 -65.98 REMARK 500 27 MET C 80 -32.53 -36.62 REMARK 500 27 LYS C 86 -69.57 -91.10 REMARK 500 27 ASP C 87 62.76 -110.16 REMARK 500 27 ASP C 88 164.28 -42.22 REMARK 500 27 ALA I 150 -32.58 167.68 REMARK 500 27 LEU I 158 54.09 -97.04 REMARK 500 27 ALA I 162 -72.21 67.64 REMARK 500 28 ALA C 7 -70.16 -56.69 REMARK 500 28 GLU C 32 -75.12 -42.30 REMARK 500 28 ASP C 33 -78.22 -103.72 REMARK 500 28 ILE C 36 77.64 -106.43 REMARK 500 28 SER C 37 -178.94 -67.28 REMARK 500 28 ASP C 65 79.45 -66.12 REMARK 500 28 ASP C 73 -168.95 -76.03 REMARK 500 28 ASP C 75 -87.30 -88.45 REMARK 500 28 PHE C 77 -72.87 -63.07 REMARK 500 28 MET C 81 -74.66 -76.38 REMARK 500 28 LYS C 86 -50.64 -142.23 REMARK 500 28 ASP C 88 93.93 -48.71 REMARK 500 28 ILE I 148 34.11 -168.38 REMARK 500 28 ALA I 150 -6.28 81.56 REMARK 500 28 MET I 154 -32.48 -37.72 REMARK 500 28 ALA I 160 -89.24 52.93 REMARK 500 28 ARG I 161 39.14 -151.60 REMARK 500 29 ASP C 2 66.40 -102.39 REMARK 500 29 ILE C 4 -31.64 -39.21 REMARK 500 29 GLU C 15 -72.70 -61.65 REMARK 500 29 ASN C 18 -72.46 -54.33 REMARK 500 29 GLU C 19 -36.69 -38.95 REMARK 500 29 VAL C 28 25.01 -146.24 REMARK 500 29 GLU C 32 -71.19 -42.82 REMARK 500 29 ASP C 33 -68.63 -109.40 REMARK 500 29 THR C 38 -34.38 -38.73 REMARK 500 29 ASP C 65 65.10 -69.90 REMARK 500 29 ASP C 73 -172.79 -55.59 REMARK 500 29 ASP C 75 -75.75 -101.18 REMARK 500 29 PHE C 77 -76.35 -52.15 REMARK 500 29 LYS C 86 -73.59 -90.46 REMARK 500 29 ASP C 87 56.10 -99.21 REMARK 500 29 ILE I 148 77.62 50.65 REMARK 500 29 SER I 149 -85.34 -113.08 REMARK 500 29 ALA I 150 -49.77 161.59 REMARK 500 30 LEU C 12 108.92 -52.57 REMARK 500 30 GLU C 15 -72.55 -42.14 REMARK 500 30 ASN C 18 -76.32 -67.81 REMARK 500 30 GLU C 19 -30.77 -39.18 REMARK 500 30 VAL C 28 26.86 -142.93 REMARK 500 30 ASP C 33 -82.83 -112.23 REMARK 500 30 LEU C 41 -39.71 -36.21 REMARK 500 30 ASP C 65 70.57 -64.87 REMARK 500 30 ASP C 73 -170.98 -57.16 REMARK 500 30 ASP C 75 -75.81 -83.90 REMARK 500 30 PHE C 77 -76.62 -49.37 REMARK 500 30 LYS C 86 16.90 -142.11 REMARK 500 30 ASP C 87 59.14 160.30 REMARK 500 30 ASP C 88 99.67 -62.87 REMARK 500 30 ALA I 150 -16.06 85.94 REMARK 500 30 LEU I 157 50.87 -150.10 REMARK 500 30 ALA I 160 98.72 48.92 REMARK 500 30 ARG I 161 -66.86 85.77 REMARK 500 REMARK 500 REMARK: NULL

REMARK 620 REMARK 620 METAL COORDINATION REMARK 620 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER; REMARK 620 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE): REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 1 CA C 93 CA REMARK 620 N RES CSSEQI ATOM REMARK 620 1 ASP C 67 OD1 REMARK 620 2 GLU C 76 OE2 118.2 REMARK 620 3 SER C 69 OG 66.7 117.7 REMARK 620 4 THR C 71 O 139.6 86.9 73.7 REMARK 620 5 VAL C 64 O 106.9 78.2 164.1 109.1 REMARK 620 6 GLU C 76 OE1 147.0 48.3 144.8 73.4 45.8 REMARK 620 7 ASP C 65 OD1 108.6 133.2 78.7 54.2 90.2 91.9 REMARK 620 N 1 2 3 4 5 6

REMARK 800 REMARK 800 SITE REMARK 800 SITE_IDENTIFIER: AC1 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CA C 93 REMARK 800 SITE_IDENTIFIER: AC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE BEP C 92

DBREF 1LXF C 1 89 UNP P63316 TNNC1_HUMAN 1 89 DBREF 1LXF I 147 163 UNP P19429 TNNI3_HUMAN 148 164

SEQRES 1 C 89 MET ASP ASP ILE TYR LYS ALA ALA VAL GLU GLN LEU THR SEQRES 2 C 89 GLU GLU GLN LYS ASN GLU PHE LYS ALA ALA PHE ASP ILE SEQRES 3 C 89 PHE VAL LEU GLY ALA GLU ASP GLY CYS ILE SER THR LYS SEQRES 4 C 89 GLU LEU GLY LYS VAL MET ARG MET LEU GLY GLN ASN PRO SEQRES 5 C 89 THR PRO GLU GLU LEU GLN GLU MET ILE ASP GLU VAL ASP SEQRES 6 C 89 GLU ASP GLY SER GLY THR VAL ASP PHE ASP GLU PHE LEU SEQRES 7 C 89 VAL MET MET VAL ARG CYS MET LYS ASP ASP SER SEQRES 1 I 17 ARG ILE SER ALA ASP ALA MET MET GLN ALA LEU LEU GLY SEQRES 2 I 17 ALA ARG ALA LYS

HET CA C 93 1 HET BEP C 92 61

HETNAM CA CALCIUM ION HETNAM BEP 1-ISOBUTOXY-2-PYRROLIDINO-3[N-BENZYLANILINO] PROPANE

HETSYN BEP BEPRIDIL

FORMUL 3 CA CA 2+ FORMUL 4 BEP C24 H34 N2 O

HELIX 1 1 ASP C 2 LEU C 12 1 11 HELIX 2 2 THR C 13 VAL C 28 1 16 HELIX 3 3 SER C 37 LEU C 48 1 12 HELIX 4 4 THR C 53 ASP C 65 1 13 HELIX 5 5 ASP C 73 LYS C 86 1 14 HELIX 6 6 ALA I 150 LEU I 157 1 8

LINK CA CA C 93 OD1 ASP C 67 1555 1555 2.72 LINK CA CA C 93 OE2 GLU C 76 1555 1555 2.45 LINK CA CA C 93 OG SER C 69 1555 1555 2.21 LINK CA CA C 93 O THR C 71 1555 1555 2.79 LINK CA CA C 93 O VAL C 64 1555 1555 3.28 LINK CA CA C 93 OE1 GLU C 76 1555 1555 2.77 LINK CA CA C 93 OD1 ASP C 65 1555 1555 2.78

SITE 1 AC1 6 VAL C 64 ASP C 65 ASP C 67 SER C 69 SITE 2 AC1 6 THR C 71 GLU C 76 SITE 1 AC2 13 PHE C 27 LEU C 41 MET C 45 LEU C 48 SITE 2 AC2 13 MET C 60 ILE C 61 VAL C 72 PHE C 77 SITE 3 AC2 13 MET C 80 MET C 81 CYS C 84 ILE I 148 SITE 4 AC2 13 MET I 153

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