HEADER HYDROLASE (SERINE PROTEINASE) 07-MAR-77 1PTP OBSLTE 20-JUN-77 1PTP 2PTP COMPND MOL_ID: 1; COMPND 2 MOLECULE:; COMPND 3 CHAIN: NULL; COMPND 4 ENGINEERED: YES SOURCE MOL_ID: 1 KEYWDS HYDROLASE (SERINE PROTEINASE) EXPDTA X-RAY DIFFRACTION AUTHOR JOHN L. CHAMBERS AND ROBERT M.STROUD REVDAT 1 1PTP 0 REMARK 1 REMARK 2 REMARK 2 RESOLUTION. NULL 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) : NULL 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 : 1629 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 11 REMARK 3 SOLVENT ATOMS : 174 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 1PTP COMPLIES WITH FORMAT V. 2.3, 09-JULY-1998 REMARK 5 REMARK 5 1PTP SITE *BIN* IS THE SPECIFIC BINDING POCKET. ASP-189 AT REMARK 5 THE 1PTP BOTTOM OF THIS POCKET FORMS AN H-BOND TO THE REMARK 5 POSITIVELY 1PTP CHARGED SIDE CHAIN OF A SPECIFIC SUBSTRATE, REMARK 5 GIVING TRYPSIN 1PTP ITS SPECIFICITY FOR THIS TYPE OF SIDE REMARK 5 CHAIN. THE BACKBONE 1PTP IN THE REGION FROM SER-214 TO CYS- REMARK 5 220 IS INVOLVED IN 1PTP HYDROGEN BONDING TO A PEPTIDE REMARK 5 SUBSTRATE. 1PTP REMARK 6 REMARK 6 1PTP SITE *ION* CONTAINS A TIGHTLY BOUND POSITIVE ION WHICH REMARK 6 IS 1PTP PROBABLY A FULLY OCCUPIED MG2+ IN THIS STRUCTURE. REMARK 6 THE ION 1PTP IS GIVEN SEQUENCE IDENTIFIER MG 159 AND OCCURS REMARK 6 AMONG THE 1PTP WATER MOLECULES AT THE END OF THIS DATA SET. REMARK 6 THE ION IS 1PTP COORDINATED IN A ROUGHLY OCTAHEDRAL FASHION REMARK 6 BY GLU 70, 1PTP ASN 72, VAL 75, GLU 80, HOH 168 AND HOH 169 REMARK 6 AS SPECIFIED 1PTP IN THE CONECT RECORDS. THIS SITE WILL REMARK 6 PROBABLY BENEFIT BY 1PTP FURTHER REFINEMENT. THIS REGION REMARK 6 WAS FIRST IDENTIFIED AS 1PTP THE PRIMARY CA2+ BINDING SITE REMARK 6 OF TRYPSIN BY BODE AND 1PTP SCHWAGER, F.E.B.S. LETT., VOL. REMARK 6 56, P139 (1975). 1PTP REMARK 7 REMARK 7 1PTP THE TRYPSIN IN THE CRYSTAL CONTAINS ABOUT 50 PER-CENT REMARK 7 1PTP ALPHA-TRYPSIN WHICH IS AUTOLYTICALLY CLEAVED BETWEEN REMARK 7 1PTP LYS 145 AND SER 146. THE DENSITY IN THE MAP AT THIS REMARK 7 POINT 1PTP IS WEAK BUT APPEARS TO ARISE FROM THE UNCLEAVED REMARK 7 COMPONENT. 1PTP REMARK 8 REMARK 8 1PTP THE HYDROGEN BONDING BETWEEN STRANDS 4 AND 5 OF SHEET REMARK 8 1PTP *SH1* IS IRREGULAR. 1PTP REMARK 9 REMARK 9 1PTP REFINEMENT OF THE STRUCTURE IS CONTINUING AND AN REMARK 9 UPDATED 1PTP SET OF COORDINATES WILL BE PROVIDE WHEN THE REMARK 9 REFINEMENT IS 1PTP JUDGED COMPLETE. 1PTP REMARK 10 REMARK 10 1PTP CORRECTION. ON INSTRUCTIONS FROM THE DEPOSITOR, THE REMARK 10 WATER 1PTP MOLECULES WITH SEQUENCE NUMBERS 15, 24, 50, 57, REMARK 10 89, 97, 1PTP 105, 127, 130, 131, 132, 141, 183, 185 AND 187 REMARK 10 WERE 1PTP REMOVED FROM THIS ENTRY BECAUSE THEY WERE REMARK 10 INVOLVED IN TOO 1PTP CLOSE CONTACTS WITH THE PROTEIN REMARK 10 MOLECULE. IN ADDITION, 1PTP FOOTNOTE NUMBER 3 WAS INSERTED REMARK 10 AND THE APPROPRIATE ATOMS 1PTP IN THE LISTING BELOW WERE REMARK 10 FLAGGED. 02-MAY-77. 1PTP REMARK 11 REMARK 11 1PTP CORRECTION. THIS ENTRY IS OBSOLETE. 14-FEB-84. 1PTP 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 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 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 (%): 47.08 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.32 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: NULL REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 21 21 21 REMARK 290 REMARK 290 SYMOP SYMMETRY REMARK 290 NNNMMM OPERATOR REMARK 290 1555 X,Y,Z REMARK 290 2555 1/2-X,-Y,1/2+Z REMARK 290 3555 -X,1/2+Y,1/2-Z REMARK 290 4555 1/2+X,1/2-Y,-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 -1.000000 0.000000 0.000000 27.42000 REMARK 290 SMTRY2 2 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY3 2 0.000000 0.000000 1.000000 33.73500 REMARK 290 SMTRY1 3 -1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 3 0.000000 1.000000 0.000000 29.30500 REMARK 290 SMTRY3 3 0.000000 0.000000 -1.000000 33.73500 REMARK 290 SMTRY1 4 1.000000 0.000000 0.000000 27.42000 REMARK 290 SMTRY2 4 0.000000 -1.000000 0.000000 29.30500 REMARK 290 SMTRY3 4 0.000000 0.000000 -1.000000 0.00000 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 REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: CLOSE CONTACTS IN SAME ASYMMETRIC UNIT REMARK 500 REMARK 500 THE FOLLOWING ATOMS ARE IN CLOSE CONTACT. REMARK 500 REMARK 500 ATM1 RES C SSEQI ATM2 RES C SSEQI REMARK 500 CB SER 96 O HOH 147 1.32 REMARK 500 OG SER 195 P DIP 1 1.53 REMARK 500 OG SER 96 O HOH 147 1.55 REMARK 500 O SER 236 N ILE 238 1.65 REMARK 500 O HOH 188 O HOH 189 1.65 REMARK 500 OG SER 202 O HOH 86 1.73 REMARK 500 OG1 THR 98 OD1 ASN 100 1.76 REMARK 500 O SER 236 N LYS 239 1.83 REMARK 500 OG SER 45 O HOH 191 1.91 REMARK 500 O SER 130 OG1 THR 134 1.92 REMARK 500 O HOH 82 O HOH 149 1.94 REMARK 500 ND2 ASN 74 OD1 ASP 153 1.98 REMARK 500 OE2 GLU 77 O HOH 168 1.99 REMARK 500 CD1 LEU 105 OG1 THR 241 2.08 REMARK 500 NE2 GLN 192 O HOH 88 2.08 REMARK 500 CG2 VAL 235 O HOH 31 2.08 REMARK 500 CD2 TRP 51 CG1 ILE 242 2.11 REMARK 500 CA SER 96 O HOH 147 2.12 REMARK 500 O CYS 201 N GLY 203 2.13 REMARK 500 NE1 TRP 51 CG2 ILE 242 2.15 REMARK 500 ND2 ASN 25 NH2 ARG 117 2.19 REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: CLOSE CONTACTS REMARK 500 REMARK 500 THE FOLLOWING ATOMS THAT ARE RELATED BY CRYSTALLOGRAPHIC REMARK 500 SYMMETRY ARE IN CLOSE CONTACT. AN ATOM LOCATED WITHIN 0.15 REMARK 500 ANGSTROMS OF A SYMMETRY RELATED ATOM IS ASSUMED TO BE ON A REMARK 500 SPECIAL POSITION AND IS, THEREFORE, LISTED IN REMARK 375 REMARK 500 INSTEAD OF REMARK 500. ATOMS WITH NON-BLANK ALTERNATE REMARK 500 LOCATION INDICATORS ARE NOT INCLUDED IN THE CALCULATIONS. REMARK 500 REMARK 500 DISTANCE CUTOFF: REMARK 500 2.2 ANGSTROMS FOR CONTACTS NOT INVOLVING HYDROGEN ATOMS REMARK 500 1.6 ANGSTROMS FOR CONTACTS INVOLVING HYDROGEN ATOMS REMARK 500 REMARK 500 ATM1 RES C SSEQI ATM2 RES C SSEQI SSYMOP DISTANCE REMARK 500 CG ASP 153 O HOH 177 4556 1.54 REMARK 500 OD1 ASP 153 O HOH 177 4556 1.78 REMARK 500 NE2 GLN 192 OG SER 202 3645 2.01 REMARK 500 O ASN 97 NZ LYS 159 3645 2.13 REMARK 500 OE2 GLU 186 O HOH 79 2664 2.17 REMARK 500 OD2 ASP 153 O HOH 177 4556 2.18 REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: NON-CIS, NON-TRANS REMARK 500 REMARK 500 THE FOLLOWING PEPTIDE BONDS DEVIATE SIGNIFICANTLY FROM BOTH REMARK 500 CIS AND TRANS CONFORMATION. CIS BONDS, IF ANY, ARE LISTED REMARK 500 ON CISPEP RECORDS. TRANS IS DEFINED AS 180 +/- 30 AND REMARK 500 CIS IS DEFINED AS 0 +/- 30 DEGREES. REMARK 500 MODEL OMEGA REMARK 500 CYS 201 SER 202 -146.61 REMARK 500 THR 241 ILE 242 -143.61 REMARK 500 ALA 243 SER 244 141.46 REMARK 525 REMARK 525 SOLVENT REMARK 525 THE FOLLOWING SOLVENT MOLECULES LIE FARTHER THAN EXPECTED REMARK 525 FROM THE PROTEIN OR NUCLEIC ACID MOLECULE AND MAY BE REMARK 525 ASSOCIATED WITH A SYMMETRY RELATED MOLECULE (M=MODEL REMARK 525 NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER; SSEQ=SEQUENCE REMARK 525 NUMBER; I=INSERTION CODE): REMARK 525 REMARK 525 M RES CSSEQI REMARK 525 HOH 5 DISTANCE = 7.73 ANGSTROMS REMARK 525 HOH 10 DISTANCE = 5.75 ANGSTROMS REMARK 525 HOH 17 DISTANCE = 6.08 ANGSTROMS REMARK 525 HOH 21 DISTANCE = 9.98 ANGSTROMS REMARK 525 HOH 22 DISTANCE = 7.04 ANGSTROMS REMARK 525 HOH 25 DISTANCE = 8.96 ANGSTROMS REMARK 525 HOH 30 DISTANCE = 5.67 ANGSTROMS REMARK 525 HOH 33 DISTANCE = 6.72 ANGSTROMS REMARK 525 HOH 34 DISTANCE = 7.71 ANGSTROMS REMARK 525 HOH 37 DISTANCE = 6.06 ANGSTROMS REMARK 525 HOH 38 DISTANCE = 7.25 ANGSTROMS REMARK 525 HOH 41 DISTANCE = 8.71 ANGSTROMS REMARK 525 HOH 42 DISTANCE = 6.31 ANGSTROMS REMARK 525 HOH 45 DISTANCE = 10.71 ANGSTROMS REMARK 525 HOH 47 DISTANCE = 6.00 ANGSTROMS REMARK 525 HOH 58 DISTANCE = 6.57 ANGSTROMS REMARK 525 HOH 59 DISTANCE = 5.51 ANGSTROMS REMARK 525 HOH 61 DISTANCE = 8.63 ANGSTROMS REMARK 525 HOH 64 DISTANCE = 8.48 ANGSTROMS REMARK 525 HOH 66 DISTANCE = 6.21 ANGSTROMS REMARK 525 HOH 70 DISTANCE = 8.06 ANGSTROMS REMARK 525 HOH 71 DISTANCE = 6.03 ANGSTROMS REMARK 525 HOH 73 DISTANCE = 5.75 ANGSTROMS REMARK 525 HOH 77 DISTANCE = 5.55 ANGSTROMS REMARK 525 HOH 79 DISTANCE = 10.48 ANGSTROMS REMARK 525 HOH 84 DISTANCE = 13.26 ANGSTROMS REMARK 525 HOH 87 DISTANCE = 12.39 ANGSTROMS REMARK 525 HOH 92 DISTANCE = 8.24 ANGSTROMS REMARK 525 HOH 100 DISTANCE = 8.97 ANGSTROMS REMARK 525 HOH 101 DISTANCE = 9.49 ANGSTROMS REMARK 525 HOH 102 DISTANCE = 7.46 ANGSTROMS REMARK 525 HOH 104 DISTANCE = 8.19 ANGSTROMS REMARK 525 HOH 108 DISTANCE = 7.25 ANGSTROMS REMARK 525 HOH 114 DISTANCE = 6.88 ANGSTROMS REMARK 525 HOH 116 DISTANCE = 5.29 ANGSTROMS REMARK 525 HOH 117 DISTANCE = 6.92 ANGSTROMS REMARK 525 HOH 118 DISTANCE = 8.16 ANGSTROMS REMARK 525 HOH 120 DISTANCE = 7.66 ANGSTROMS REMARK 525 HOH 125 DISTANCE = 8.88 ANGSTROMS REMARK 525 HOH 135 DISTANCE = 8.15 ANGSTROMS REMARK 525 HOH 137 DISTANCE = 9.93 ANGSTROMS REMARK 525 HOH 138 DISTANCE = 7.22 ANGSTROMS REMARK 525 HOH 139 DISTANCE = 5.35 ANGSTROMS REMARK 525 HOH 143 DISTANCE = 5.68 ANGSTROMS REMARK 525 HOH 144 DISTANCE = 7.95 ANGSTROMS REMARK 525 HOH 150 DISTANCE = 10.43 ANGSTROMS SEQRES 1 223 ILE VAL GLY GLY TYR THR CYS GLY ALA ASN THR VAL PRO SEQRES 2 223 TYR GLN VAL SER LEU ASN SER GLY TYR HIS PHE CYS GLY SEQRES 3 223 GLY SER LEU ILE ASN SER GLN TRP VAL VAL SER ALA ALA SEQRES 4 223 HIS CYS TYR LYS SER GLY ILE GLN VAL ARG LEU GLY GLU SEQRES 5 223 ASP ASN ILE ASN VAL VAL GLU GLY ASN GLU GLN PHE ILE SEQRES 6 223 SER ALA SER LYS SER ILE VAL HIS PRO SER TYR ASN SER SEQRES 7 223 ASN THR LEU ASN ASN ASP ILE MET LEU ILE LYS LEU LYS SEQRES 8 223 SER ALA ALA SER LEU ASN SER ARG VAL ALA SER ILE SER SEQRES 9 223 LEU PRO THR SER CYS ALA SER ALA GLY THR GLN CYS LEU SEQRES 10 223 ILE SER GLY TRP GLY ASN THR LYS SER SER GLY THR SER SEQRES 11 223 TYR PRO ASP VAL LEU LYS CYS LEU LYS ALA PRO ILE LEU SEQRES 12 223 SER ASP SER SER CYS LYS SER ALA TYR PRO GLY GLN ILE SEQRES 13 223 THR SER ASN MET PHE CYS ALA GLY TYR LEU GLU GLY GLY SEQRES 14 223 LYS ASP SER CYS GLN GLY ASP SER GLY GLY PRO VAL VAL SEQRES 15 223 CYS SER GLY LYS LEU GLN GLY ILE VAL SER TRP GLY SER SEQRES 16 223 GLY CYS ALA GLN LYS ASN LYS PRO GLY VAL TYR THR LYS SEQRES 17 223 VAL CYS ASN TYR VAL SER TRP ILE LYS GLN THR ILE ALA SEQRES 18 223 SER ASN FTNOTE 1 THE INTERPRETATION IS STILL TENTATIVE IN THE FOUR REGIONS FTNOTE 1 SER 61 - GLN 64, THR 144 - THR 149, CYS 201 - GLN 210 AND FTNOTE 1 SER 236 - ASN 245. FTNOTE 2 THE AREA AROUND THE ACTIVE SITE HIS 57, ASP 102, SER 195 FTNOTE 2 IS PARTICULARLY WELL DEFINED. FTNOTE 3 A NEW REFINEMENT CYCLE PERFORMED BY THE DEPOSITOR FTNOTE 3 INDICATES THAT THE SIDE CHAINS OF RESIDUES GLN 64, LEU 66, FTNOTE 3 ASN 100, LEU 123, ILE 212 AND VAL 235 ARE SIGNIFICANTLY FTNOTE 3 REORIENTED WITH RESPECT TO THEIR POSITIONS GIVEN HERE. THE FTNOTE 3 COORDINATES GIVEN FOR THESE ATOMS ARE, THEREFORE, TO BE FTNOTE 3 CONSIDERED AS TENTATIVE ONLY. HET MG 159 1 HET DIP 1 10 HETNAM MG MAGNESIUM ION HETNAM DIP DIPENTYLAMINE FORMUL 2 MG MG 2+ FORMUL 3 DIP C10 H23 N FORMUL 4 HOH *174(H2 O1) HELIX 1 SHO SER 164 TYR 172 1IRREGULAR AFTER CYS 168 9 HELIX 2 310 LYS 230 VAL 235 5LEADS INTO TERMINAL ALPHA-HLX 6 HELIX 3 TER TYR 234 ASN 245 1C-TERMINAL HELIX 12 SHEET 1 SH1 7 TYR 20 TYR 20 0 SHEET 2 SH1 7 LYS 156 PRO 161 -1 N TYR 20 O CYS 157 SHEET 3 SH1 7 CYS 136 GLY 140 -1 N LEU 158 O ILE 138 SHEET 4 SH1 7 GLY 197 CYS 201 -1 SHEET 5 SH1 7 LYS 204 SER 214 -1 N VAL 213 O GLY 197 SHEET 6 SH1 7 GLY 226 VAL 231 -1 N THR 229 O ILE 212 SHEET 7 SH1 7 ASN 179 ALA 183 -1 N PHE 181 O TYR 228 SHEET 1 SH2 4 GLY 43 SER 45 0 SHEET 2 SH2 4 VAL 52 ALA 55 -1 N VAL 53 O SER 45 SHEET 3 SH2 4 MET 104 LYS 107 -1 N SER 54 O MET 104 SHEET 4 SH2 4 LYS 87 HIS 91 -1 N HIS 91 O ILE 103 SHEET 1 SH3 2 ILE 63 LEU 66 0 SHEET 2 SH3 2 GLN 81 ALA 85 -1 N GLN 81 O LEU 66 TURN 1 L03 ALA 56 TYR 59 LOOP CONTAINS ACTIVE SITE HIS TURN 2 L01 GLY 23 THR 26 TURN 3 L02 ASN 48 TRP 51 TURN 4 L04 HIS 91 TYR 94 MORE LIKE 3/10 HELIX THAN BEND TURN 5 L05 LEU 99 ASP 102 TURN 6 L06 ASN 115 VAL 118 3/10 LOOP ROUGHLY FORMED TURN 7 L07 SER 130 THR 134 SEQUENCE DELETION AT 131 TURN 8 L08 TYR 172 GLN 175 TURN 9 L09 THR 177 MET 180 TURN 10 L11 CYS 191 ASP 194 TURN 11 L12 ASP 194 GLY 197 CONTAINS ACTIVE SITE SERINE TURN 12 L13 CYS 201 LYS 204 SSBOND 1 CYS 22 CYS 157 SSBOND 2 CYS 42 CYS 58 SSBOND 3 CYS 128 CYS 232 SSBOND 4 CYS 136 CYS 201 SSBOND 5 CYS 168 CYS 182 SSBOND 6 CYS 191 CYS 220 SITE 1 CAT 4 HIS 57 ASP 102 GLY 193 SER 195 SITE 1 BIN 10 ASP 189 SER 190 CYS 191 GLN 192 SITE 2 BIN 10 SER 214 TRP 215 GLY 216 SER 217 SITE 3 BIN 10 GLY 219 CYS 220 SITE 1 ION 11 GLU 70 ASP 71 ASN 72 ILE 73 SITE 2 ION 11 ASN 74 VAL 75 VAL 76 GLU 77 SITE 3 ION 11 GLY 78 ASN 79 GLU 80 CRYST1 54.840 58.610 67.470 90.00 90.00 90.00 P 21 21 21 4 ORIGX1 0.018235 0.000000 0.000000 0.00000 ORIGX2 0.000000 0.017062 0.000000 0.00000 ORIGX3 0.000000 0.000000 0.014821 0.00000 SCALE1 0.018235 0.000000 0.000000 0.00000 SCALE2 0.000000 0.017062 0.000000 0.00000 SCALE3 0.000000 0.000000 0.014821 0.00000