HEADER PHOTOSYNTHETIC REACTION CENTER 19-JAN-93 1PPS OBSLTE 27-MAY-98 1PPS 2PPS TITLE THREE-DIMENSIONAL STRUCTURE OF SYSTEM I OF PHOTOSYNTHESIS TITLE 2 AT 6 ANGSTROM RESOLUTION COMPND MOL_ID: 1; COMPND 2 MOLECULE:; COMPND 3 CHAIN: NULL; COMPND 4 ENGINEERED: YES SOURCE MOL_ID: 1 KEYWDS PHOTOSYNTHETIC REACTION CENTER EXPDTA X-RAY DIFFRACTION AUTHOR N.KRAUSS,W.HINRICHS,I.WITT,P.FROMME,W.PRIZKOW,Z.DAUTER, AUTHOR 2 C.BETZEL,K.S.WILSON,H.T.WITT,W.SAENGER REVDAT 1 31-JUL-94 1PPS 0 JRNL AUTH N.KRAUSS,W.HINRICHS,I.WITT,P.FROMME,W.PRIZKOW, JRNL AUTH 2 Z.DAUTER,C.BETZEL,K.S.WILSON,H.T.WITT,W.SAENGER JRNL TITL THREE-DIMENSIONAL STRUCTURE OF SYSTEM I OF JRNL TITL 2 PHOTOSYNTHESIS AT 6 ANGSTROM RESOLUTION JRNL REF NATURE V. 361 326 1993 JRNL REFN ASTM NATUAS UK ISSN 0028-0836 REMARK 1 REMARK 1 REFERENCE 1 REMARK 1 AUTH I.WITT,H.T.WITT,D.DIFIORE,M.ROEGNER,W.HINRICHS, REMARK 1 AUTH 2 W.SAENGER,J.GRANZIN,C.BETZEL,Z.DAUTER REMARK 1 TITL X-RAY CHARACTERIZATION OF SINGLE CRYSTALS OF THE REMARK 1 TITL 2 REACTION CENTER I OF WATER SPLITTING PHOTOSYNTHESIS REMARK 1 REF BER.BUNSENGES.PHYS.CHEM. V. 92 1503 1988 REMARK 1 REFN ASTM BBPCAX GW ISSN 0005-9021 REMARK 2 REMARK 2 RESOLUTION. 6.00 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : NULL REMARK 3 AUTHORS : NULL REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 6.00 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : NULL REMARK 3 DATA CUTOFF (SIGMA(F)) : NULL REMARK 3 DATA CUTOFF HIGH (ABS(F)) : NULL REMARK 3 DATA CUTOFF LOW (ABS(F)) : NULL REMARK 3 COMPLETENESS (WORKING+TEST) (%) : NULL REMARK 3 NUMBER OF REFLECTIONS : NULL REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT. REMARK 3 CROSS-VALIDATION METHOD : NULL REMARK 3 FREE R VALUE TEST SET SELECTION : NULL REMARK 3 R VALUE (WORKING SET) : NULL REMARK 3 FREE R VALUE : NULL REMARK 3 FREE R VALUE TEST SET SIZE (%) : NULL REMARK 3 FREE R VALUE TEST SET COUNT : NULL REMARK 3 ESTIMATED ERROR OF FREE R VALUE : NULL REMARK 3 REMARK 3 FIT IN THE HIGHEST RESOLUTION BIN. REMARK 3 TOTAL NUMBER OF BINS USED : NULL REMARK 3 BIN RESOLUTION RANGE HIGH (A) : NULL REMARK 3 BIN RESOLUTION RANGE LOW (A) : NULL REMARK 3 BIN COMPLETENESS (WORKING+TEST) (%) : NULL REMARK 3 REFLECTIONS IN BIN (WORKING SET) : NULL REMARK 3 BIN R VALUE (WORKING SET) : NULL REMARK 3 BIN FREE R VALUE : NULL REMARK 3 BIN FREE R VALUE TEST SET SIZE (%) : NULL REMARK 3 BIN FREE R VALUE TEST SET COUNT : NULL REMARK 3 ESTIMATED ERROR OF BIN FREE R VALUE : NULL REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 499 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 223 REMARK 3 SOLVENT ATOMS : 0 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : NULL REMARK 3 MEAN B VALUE (OVERALL, A**2) : NULL REMARK 3 OVERALL ANISOTROPIC B VALUE. REMARK 3 B11 (A**2) : NULL REMARK 3 B22 (A**2) : NULL REMARK 3 B33 (A**2) : NULL REMARK 3 B12 (A**2) : NULL REMARK 3 B13 (A**2) : NULL REMARK 3 B23 (A**2) : NULL REMARK 3 REMARK 3 ESTIMATED COORDINATE ERROR. REMARK 3 ESD FROM LUZZATI PLOT (A) : NULL REMARK 3 ESD FROM SIGMAA (A) : NULL REMARK 3 LOW RESOLUTION CUTOFF (A) : NULL REMARK 3 REMARK 3 CROSS-VALIDATED ESTIMATED COORDINATE ERROR. REMARK 3 ESD FROM C-V LUZZATI PLOT (A) : NULL REMARK 3 ESD FROM C-V SIGMAA (A) : NULL REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES. REMARK 3 BOND LENGTHS (A) : NULL REMARK 3 BOND ANGLES (DEGREES) : NULL REMARK 3 DIHEDRAL ANGLES (DEGREES) : NULL REMARK 3 IMPROPER ANGLES (DEGREES) : NULL REMARK 3 REMARK 3 ISOTROPIC THERMAL MODEL : NULL REMARK 3 REMARK 3 ISOTROPIC THERMAL FACTOR RESTRAINTS. RMS SIGMA REMARK 3 MAIN-CHAIN BOND (A**2) : NULL ; NULL REMARK 3 MAIN-CHAIN ANGLE (A**2) : NULL ; NULL REMARK 3 SIDE-CHAIN BOND (A**2) : NULL ; NULL REMARK 3 SIDE-CHAIN ANGLE (A**2) : NULL ; NULL REMARK 3 REMARK 3 NCS MODEL : NULL REMARK 3 REMARK 3 NCS RESTRAINTS. RMS SIGMA/WEIGHT REMARK 3 GROUP 1 POSITIONAL (A) : NULL ; NULL REMARK 3 GROUP 1 B-FACTOR (A**2) : NULL ; NULL REMARK 3 REMARK 3 PARAMETER FILE 1 : NULL REMARK 3 TOPOLOGY FILE 1 : NULL REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: NULL REMARK 4 REMARK 4 1PPS COMPLIES WITH FORMAT V. 2.3, 09-JULY-1998 REMARK 5 REMARK 5 1PPS TEMPERATURE FACTORS HAVE BEEN SET TO 20.0 FOR ALL " REMARK 5 ATOMS" 1PPS ARBITRARILY. 1PPS REMARK 6 REMARK 6 1PPS ALTHOUGH A PHOTOSYSTEM I MONOMER CONSISTS OF 11 REMARK 6 SUBUNITS, 1PPS AN ASSIGNMENT OF THE IDENTIFIED HELICES TO REMARK 6 THESE SUBUNITS 1PPS IS IMPOSSIBLE AT THIS STAGE. ONLY FOR REMARK 6 THOSE HELICES 1PPS RELATED BY THE LOCAL SYMMETRY AXIS DO REMARK 6 THE DEPOSITORS 1PPS ASSUME THAT THEY PROBABLY BELONG TO THE REMARK 6 LARGE SUBUNITS A 1PPS AND B. 1PPS REMARK 7 REMARK 7 1PPS HELICES A - N' HAVE BEEN DESCRIBED BY POLYALANINE REMARK 7 ALPHA 1PPS HELICES OF SUITABLE LENGTH AND ORIENTATION, FOR REMARK 7 WHICH ONLY 1PPS THE CARBON ALPHA POSITIONS ARE GIVEN (BUT REMARK 7 NOTE THAT THESE 1PPS ARE NOT TO BE INTERPRETED AS BACKBONE REMARK 7 COORDINATES, SEE 1PPS REMARK 4). FOR KINKED HELICES REMARK 7 DIFFERENT FRAGMENTS HAVE 1PPS BEEN USED, E.G. "A1" AND "A2" REMARK 7 FOR HELIX "A" AND "G'1" AND 1PPS "G'2" FOR HELIX "G'". FOR REMARK 7 HELICES RELATED BY A LOCAL 1PPS APPROXIMATE TWO-FOLD REMARK 7 ROTATION AXIS, THE FIRST LETTERS IN 1PPS THE HELIX REMARK 7 IDENTIFIER ARE IDENTICAL, E.G. "B" AND "B'", 1PPS "C" AND " REMARK 7 C'". 1PPS REMARK 8 REMARK 8 1PPS RESIDUES FES CORRESPOND TO THE [4FE-4S] CLUSTERS OF REMARK 8 1PPS PHOTOSYSTEM I, FX, FA AND FB. ONLY THE POSITIONS OF REMARK 8 THE 1PPS CENTERS OF THESE CLUSTERS ARE GIVEN AND THEY ARE REMARK 8 1PPS IDENTIFIED AS "FE" ATOMS. 1PPS REMARK 9 REMARK 9 1PPS RESIDUES CHL 505 - 506 PROBABLY BELONG TO THE ELECTRON REMARK 9 1PPS TRANSFER CHAIN OF PHOTOSYSTEM I. THE DIHYDROPORPHYRIN REMARK 9 1PPS PLANES ARE DESCRIBED BY A CENTRAL "MG" ATOM AND FOUR " REMARK 9 N" 1PPS ATOMS (SEE ALSO REMARK 4). 1PPS REMARK 10 REMARK 10 1PPS RESIDUES CHL 507 - 546 PROBABLY BELONG TO THE LIGHT REMARK 10 1PPS HARVESTING CHLOROPHYLL MOLECULES. THE DIHYDROPORPHYRIN REMARK 10 1PPS PLANES ARE DESCRIBED BY A CENTRAL "MG" ATOM AND FOUR " REMARK 10 N" 1PPS ATOMS (SEE ALSO REMARK 4). 1PPS REMARK 11 REMARK 11 1PPS THE TRANSFORMATION PRESENTED ON *MTRIX* RECORDS BELOW REMARK 11 1PPS REPRESENTS A LOCAL APPROXIMATE TWO-FOLD ROTATION AXIS, REMARK 11 1PPS WHICH PASSES THROUGH THE IRON-SULFUR CLUSTER AND REMARK 11 RELATES 1PPS HELICES A AND A', B AND B', ETC. THESE HELICES REMARK 11 PROBABLY 1PPS BELONG TO THE HOMOLOGOUS SUBUNITS A AND B OF REMARK 11 PHOTOSYSTEM I. 1PPS REMARK 12 REMARK 12 1PPS THE FOLLOWING TWO TRANSFORMATIONS WILL YIELD THE REMARK 12 COMPLETE 1PPS TRIMER WHEN APPLIED TO THE COORDINATES IN REMARK 12 THIS ENTRY. 1PPS THE TRANSFORMATIONS CORRESPOND TO THE REMARK 12 CRYSTALLOGRAPHIC 1PPS THREE-FOLD ROTATION AXIS. 1PPS 1PPS - REMARK 12 0.500 -0.866 0.000 287.0 1PPS 0.866 -0.500 0.000 0.0 1PPS REMARK 12 0.000 0.000 1.000 0.0 1PPS 1PPS -0.500 0.866 0.000 143.5 REMARK 12 1PPS -0.866 -0.500 0.000 248.5 1PPS 0.000 0.000 1.000 0.0 REMARK 12 1PPS REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : NULL REMARK 200 TEMPERATURE (KELVIN) : NULL REMARK 200 PH : NULL REMARK 200 NUMBER OF CRYSTALS USED : NULL REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : NULL REMARK 200 RADIATION SOURCE : NULL REMARK 200 BEAMLINE : NULL REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : NULL REMARK 200 WAVELENGTH OR RANGE (A) : NULL REMARK 200 MONOCHROMATOR : NULL REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : NULL REMARK 200 DETECTOR MANUFACTURER : NULL REMARK 200 INTENSITY-INTEGRATION SOFTWARE : NULL REMARK 200 DATA SCALING SOFTWARE : NULL REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : NULL REMARK 200 RESOLUTION RANGE HIGH (A) : NULL REMARK 200 RESOLUTION RANGE LOW (A) : NULL REMARK 200 REJECTION CRITERIA (SIGMA(I)) : NULL REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : NULL REMARK 200 DATA REDUNDANCY : NULL REMARK 200 R MERGE (I) : NULL REMARK 200 R SYM (I) : NULL REMARK 200 <I/SIGMA(I)> FOR THE DATA SET : NULL REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : NULL REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : NULL REMARK 200 COMPLETENESS FOR SHELL (%) : NULL REMARK 200 DATA REDUNDANCY IN SHELL : NULL REMARK 200 R MERGE FOR SHELL (I) : NULL REMARK 200 R SYM FOR SHELL (I) : NULL REMARK 200 <I/SIGMA(I)> FOR SHELL : NULL REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: NULL REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: NULL REMARK 200 SOFTWARE USED: NULL REMARK 200 STARTING MODEL: NULL REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): NULL REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): NULL REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: NULL REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 63 REMARK 290 REMARK 290 SYMOP SYMMETRY REMARK 290 NNNMMM OPERATOR REMARK 290 1555 X,Y,Z REMARK 290 2555 -Y,X-Y,Z REMARK 290 3555 -X+Y,-X,Z REMARK 290 4555 -X,-Y,1/2+Z REMARK 290 5555 Y,-X+Y,1/2+Z REMARK 290 6555 X-Y,X,1/2+Z REMARK 290 REMARK 290 WHERE NNN -> OPERATOR NUMBER REMARK 290 MMM -> TRANSLATION VECTOR REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY TRANSFORMATIONS REMARK 290 THE FOLLOWING TRANSFORMATIONS OPERATE ON THE ATOM/HETATM REMARK 290 RECORDS IN THIS ENTRY TO PRODUCE CRYSTALLOGRAPHICALLY REMARK 290 RELATED MOLECULES. REMARK 290 SMTRY1 1 1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 1 0.000000 1.000000 0.000000 0.00000 REMARK 290 SMTRY3 1 0.000000 0.000000 1.000000 0.00000 REMARK 290 SMTRY1 2 -0.500000 -0.866025 0.000000 0.00000 REMARK 290 SMTRY2 2 0.866025 -0.500000 0.000000 0.00000 REMARK 290 SMTRY3 2 0.000000 0.000000 1.000000 0.00000 REMARK 290 SMTRY1 3 -0.500000 0.866025 0.000000 0.00000 REMARK 290 SMTRY2 3 -0.866025 -0.500000 0.000000 0.00000 REMARK 290 SMTRY3 3 0.000000 0.000000 1.000000 0.00000 REMARK 290 SMTRY1 4 -1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 4 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY3 4 0.000000 0.000000 1.000000 83.50000 REMARK 290 SMTRY1 5 0.500000 0.866025 0.000000 0.00000 REMARK 290 SMTRY2 5 -0.866025 0.500000 0.000000 0.00000 REMARK 290 SMTRY3 5 0.000000 0.000000 1.000000 83.50000 REMARK 290 SMTRY1 6 0.500000 -0.866025 0.000000 0.00000 REMARK 290 SMTRY2 6 0.866025 0.500000 0.000000 0.00000 REMARK 290 SMTRY3 6 0.000000 0.000000 1.000000 83.50000 REMARK 290 REMARK 290 REMARK: NULL REMARK 300 REMARK 300 BIOMOLECULE: 1 REMARK 300 THIS ENTRY CONTAINS THE CRYSTALLOGRAPHIC ASYMMETRIC UNIT REMARK 300 WHICH CONSISTS OF 1 CHAIN(S). SEE REMARK 350 FOR REMARK 300 INFORMATION ON GENERATING THE BIOLOGICAL MOLECULE(S). REMARK 350 REMARK 350 GENERATING THE BIOMOLECULE 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 SEQRES 1 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 2 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 3 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 4 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 5 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 6 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 7 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 8 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 9 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 10 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 11 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 12 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 13 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 14 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 15 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 16 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 17 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 18 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 19 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 20 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 21 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 22 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 23 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 24 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 25 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 26 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 27 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 28 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 29 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 30 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 31 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 32 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 33 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 34 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 35 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 36 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 37 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 38 499 UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK UNK SEQRES 39 499 UNK UNK UNK UNK UNK HET FS4 500 1 HET FS4 501 1 HET FS4 502 1 HET CHL 503 5 HET CHL 504 5 HET CHL 505 5 HET CHL 506 5 HET CHL 507 5 HET CHL 508 5 HET CHL 509 5 HET CHL 510 5 HET CHL 511 5 HET CHL 512 5 HET CHL 513 5 HET CHL 514 5 HET CHL 515 5 HET CHL 516 5 HET CHL 517 5 HET CHL 518 5 HET CHL 519 5 HET CHL 520 5 HET CHL 521 5 HET CHL 522 5 HET CHL 523 5 HET CHL 524 5 HET CHL 525 5 HET CHL 526 5 HET CHL 527 5 HET CHL 528 5 HET CHL 529 5 HET CHL 530 5 HET CHL 531 5 HET CHL 532 5 HET CHL 533 5 HET CHL 534 5 HET CHL 535 5 HET CHL 536 5 HET CHL 537 5 HET CHL 538 5 HET CHL 539 5 HET CHL 540 5 HET CHL 541 5 HET CHL 542 5 HET CHL 543 5 HET CHL 544 5 HET CHL 545 5 HET CHL 546 5 HETNAM FS4 IRON/SULFUR CLUSTER HETNAM CHL CHLOROPHYLL B FORMUL 2 FS4 3(FE4 S4) FORMUL 5 CHL 44(C55 H70 MG N4 O6 2+) HELIX 1 A1 UNK 1 UNK 7 1HELIX CLASS CANNOT 7 HELIX 2 A2 UNK 8 UNK 18 1REALLY BE DETERMINED 11 HELIX 3 B UNK 19 UNK 29 1AT THIS RESOLUTION 11 HELIX 4 C UNK 30 UNK 42 1 13 HELIX 5 D1 UNK 43 UNK 49 1 7 HELIX 6 D2 UNK 50 UNK 60 1 11 HELIX 7 E UNK 61 UNK 67 1 7 HELIX 8 F UNK 68 UNK 94 1 27 HELIX 9 G1 UNK 95 UNK 103 1 9 HELIX 10 G2 UNK 104 UNK 130 1 27 HELIX 11 H UNK 131 UNK 149 1 19 HELIX 12 I UNK 150 UNK 166 1 17 HELIX 13 J UNK 167 UNK 175 1 9 HELIX 14 K1 UNK 176 UNK 188 1 13 HELIX 15 K2 UNK 189 UNK 195 1 7 HELIX 16 L1 UNK 196 UNK 208 1 13 HELIX 17 L2 UNK 209 UNK 217 1 9 HELIX 18 M1 UNK 218 UNK 235 1 18 HELIX 19 M2 UNK 236 UNK 244 1 9 HELIX 20 N UNK 245 UNK 265 1 21 HELIX 21 O UNK 266 UNK 274 1 9 HELIX 22 P UNK 275 UNK 281 1 7 HELIX 23 Q UNK 282 UNK 288 1 7 HELIX 24 R UNK 289 UNK 301 1 13 HELIX 25 S UNK 302 UNK 312 1 11 HELIX 26 A'1 UNK 313 UNK 331 1 19 HELIX 27 A'2 UNK 332 UNK 341 1 10 HELIX 28 B' UNK 342 UNK 353 1 12 HELIX 29 C' UNK 354 UNK 368 1 15 HELIX 30 D' UNK 369 UNK 393 1 25 HELIX 31 E' UNK 394 UNK 410 1 17 HELIX 32 F' UNK 411 UNK 437 1 27 HELIX 33 G'1 UNK 438 UNK 448 1 11 HELIX 34 G'2 UNK 449 UNK 461 1 13 HELIX 35 H' UNK 462 UNK 482 1 21 HELIX 36 N' UNK 483 UNK 499 1 17 CRYST1 287.000 287.000 167.000 90.00 90.00 120.00 P 63 6 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 0.003484 0.002012 0.000000 0.00000 SCALE2 0.000000 0.004023 0.000000 0.00000 SCALE3 0.000000 0.000000 0.005988 0.00000