HEADER IMMUNE SYSTEM, MEMBRANE PROTEIN 01-JUL-04 1TWQ TITLE CRYSTAL STRUCTURE OF THE C-TERMINAL PGN-BINDING DOMAIN OF HUMAN PGRP- TITLE 2 IALPHA IN COMPLEX WITH PGN ANALOG MURAMYL TRIPEPTIDE CAVEAT 1TWQ GMA P 997 HAS WRONG CHIRALITY AT ATOM CA AMU P 1001 HAS CAVEAT 2 1TWQ WRONG CHIRALITY AT ATOM C1 COMPND MOL_ID: 1; COMPND 2 MOLECULE: PEPTIDOGLYCAN RECOGNITION PROTEIN-I-ALPHA; COMPND 3 CHAIN: A; COMPND 4 FRAGMENT: C-TERMINAL DOMAIN; COMPND 5 ENGINEERED: YES; COMPND 6 OTHER_DETAILS: COMPLEXED WITH PGN FRAGMENT (AMU)A(GMA)K(NH2); COMPND 7 MOL_ID: 2; COMPND 8 MOLECULE: MURAMYL TRIPEPTIDE; COMPND 9 CHAIN: P; COMPND 10 FRAGMENT: PGN FRAGMENT; 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: PGLYRP3, PGRPIA; SOURCE 6 EXPRESSION_SYSTEM: ESCHERICHIA COLI BL21(DE3); SOURCE 7 EXPRESSION_SYSTEM_TAXID: 469008; SOURCE 8 EXPRESSION_SYSTEM_STRAIN: BL21(DE3); SOURCE 9 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID; SOURCE 10 EXPRESSION_SYSTEM_PLASMID: PT7-7; SOURCE 11 MOL_ID: 2; SOURCE 12 SYNTHETIC: YES; SOURCE 13 ORGANISM_SCIENTIFIC: SYNTHETIC CONSTRUCT; SOURCE 14 ORGANISM_TAXID: 32630; SOURCE 15 OTHER_DETAILS: THE MURAMYL TRIPEPTIDE EXISTS IN ALL BATERIAL SOURCE 16 PEPTIDOGLYCANS KEYWDS CRYSTAL STRUCTURE; COMPLEX; PGRP; PGRP-IALPHA; PGN ANALOG, IMMUNE KEYWDS 2 SYSTEM, MEMBRANE PROTEIN EXPDTA X-RAY DIFFRACTION AUTHOR R.GUAN,A.ROYCHOWDURY,G.-A.BOONS,R.A.MARIUZZA REVDAT 8 28-FEB-24 1TWQ 1 CAVEAT COMPND SOURCE REMARK REVDAT 8 2 1 DBREF SEQRES LINK ATOM REVDAT 7 15-NOV-23 1TWQ 1 LINK ATOM REVDAT 6 23-AUG-23 1TWQ 1 HETSYN REVDAT 5 29-JUL-20 1TWQ 1 CAVEAT REMARK HETNAM LINK REVDAT 5 2 1 SITE REVDAT 4 11-OCT-17 1TWQ 1 REMARK REVDAT 3 16-NOV-11 1TWQ 1 VERSN HETATM REVDAT 2 24-FEB-09 1TWQ 1 VERSN REVDAT 1 14-DEC-04 1TWQ 0 JRNL AUTH R.GUAN,A.ROYCHOWDHURY,B.EMBER,S.KUMAR,G.-A.BOONS, JRNL AUTH 2 R.A.MARIUZZA JRNL TITL STRUCTURAL BASIS FOR PEPTIDOGLYCAN BINDING BY PEPTIDOGLYCAN JRNL TITL 2 RECOGNITION PROTEINS JRNL REF PROC.NATL.ACAD.SCI.USA V. 101 17168 2004 JRNL REFN ISSN 0027-8424 JRNL PMID 15572450 JRNL DOI 10.1073/PNAS.0407856101 REMARK 2 REMARK 2 RESOLUTION. 2.30 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : CNS 1.1 REMARK 3 AUTHORS : BRUNGER,ADAMS,CLORE,DELANO,GROS,GROSSE- REMARK 3 : KUNSTLEVE,JIANG,KUSZEWSKI,NILGES,PANNU, REMARK 3 : READ,RICE,SIMONSON,WARREN REMARK 3 REMARK 3 REFINEMENT TARGET : ENGH & HUBER REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 2.30 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 26.54 REMARK 3 DATA CUTOFF (SIGMA(F)) : 0.000 REMARK 3 DATA CUTOFF HIGH (ABS(F)) : 1059174.250 REMARK 3 DATA CUTOFF LOW (ABS(F)) : 0.0000 REMARK 3 COMPLETENESS (WORKING+TEST) (%) : 95.7 REMARK 3 NUMBER OF REFLECTIONS : 11464 REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT. REMARK 3 CROSS-VALIDATION METHOD : THROUGHOUT REMARK 3 FREE R VALUE TEST SET SELECTION : RANDOM REMARK 3 R VALUE (WORKING SET) : 0.222 REMARK 3 FREE R VALUE : 0.252 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 5.200 REMARK 3 FREE R VALUE TEST SET COUNT : 592 REMARK 3 ESTIMATED ERROR OF FREE R VALUE : 0.011 REMARK 3 REMARK 3 FIT IN THE HIGHEST RESOLUTION BIN. REMARK 3 TOTAL NUMBER OF BINS USED : 6 REMARK 3 BIN RESOLUTION RANGE HIGH (A) : 2.30 REMARK 3 BIN RESOLUTION RANGE LOW (A) : 2.44 REMARK 3 BIN COMPLETENESS (WORKING+TEST) (%) : 93.50 REMARK 3 REFLECTIONS IN BIN (WORKING SET) : 1751 REMARK 3 BIN R VALUE (WORKING SET) : 0.2850 REMARK 3 BIN FREE R VALUE : 0.3090 REMARK 3 BIN FREE R VALUE TEST SET SIZE (%) : 5.00 REMARK 3 BIN FREE R VALUE TEST SET COUNT : 93 REMARK 3 ESTIMATED ERROR OF BIN FREE R VALUE : 0.032 REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 1310 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 20 REMARK 3 SOLVENT ATOMS : 48 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : 27.30 REMARK 3 MEAN B VALUE (OVERALL, A**2) : 32.80 REMARK 3 OVERALL ANISOTROPIC B VALUE. REMARK 3 B11 (A**2) : 1.28000 REMARK 3 B22 (A**2) : 1.28000 REMARK 3 B33 (A**2) : -2.55000 REMARK 3 B12 (A**2) : 3.78000 REMARK 3 B13 (A**2) : 0.00000 REMARK 3 B23 (A**2) : 0.00000 REMARK 3 REMARK 3 ESTIMATED COORDINATE ERROR. REMARK 3 ESD FROM LUZZATI PLOT (A) : 0.30 REMARK 3 ESD FROM SIGMAA (A) : 0.33 REMARK 3 LOW RESOLUTION CUTOFF (A) : 5.00 REMARK 3 REMARK 3 CROSS-VALIDATED ESTIMATED COORDINATE ERROR. REMARK 3 ESD FROM C-V LUZZATI PLOT (A) : 0.37 REMARK 3 ESD FROM C-V SIGMAA (A) : 0.39 REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES. REMARK 3 BOND LENGTHS (A) : 0.007 REMARK 3 BOND ANGLES (DEGREES) : 1.400 REMARK 3 DIHEDRAL ANGLES (DEGREES) : 23.20 REMARK 3 IMPROPER ANGLES (DEGREES) : 0.850 REMARK 3 REMARK 3 ISOTROPIC THERMAL MODEL : RESTRAINED 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 BULK SOLVENT MODELING. REMARK 3 METHOD USED : FLAT MODEL REMARK 3 KSOL : 0.33 REMARK 3 BSOL : 36.92 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 : PROTEIN_REP.PARAM REMARK 3 PARAMETER FILE 2 : MTP.PAR REMARK 3 PARAMETER FILE 3 : WATER.PARAM REMARK 3 PARAMETER FILE 4 : ION.PARAM REMARK 3 PARAMETER FILE 5 : NULL REMARK 3 TOPOLOGY FILE 1 : PROTEIN.TOP REMARK 3 TOPOLOGY FILE 2 : NULL REMARK 3 TOPOLOGY FILE 3 : NULL REMARK 3 TOPOLOGY FILE 4 : NULL REMARK 3 TOPOLOGY FILE 5 : NULL REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: NULL REMARK 4 REMARK 4 1TWQ COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 16-JUL-04. REMARK 100 THE DEPOSITION ID IS D_1000022978. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 04-MAY-04 REMARK 200 TEMPERATURE (KELVIN) : 173 REMARK 200 PH : 8.5 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : N REMARK 200 RADIATION SOURCE : ROTATING ANODE REMARK 200 BEAMLINE : NULL REMARK 200 X-RAY GENERATOR MODEL : RIGAKU REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 1.5418 REMARK 200 MONOCHROMATOR : SI 111 REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : IMAGE PLATE REMARK 200 DETECTOR MANUFACTURER : RIGAKU RAXIS IV REMARK 200 INTENSITY-INTEGRATION SOFTWARE : CRYSTALCLEAR REMARK 200 DATA SCALING SOFTWARE : CRYSTALCLEAR (MSC/RIGAKU) REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 11464 REMARK 200 RESOLUTION RANGE HIGH (A) : 2.300 REMARK 200 RESOLUTION RANGE LOW (A) : 26.540 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : 0.000 REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 95.8 REMARK 200 DATA REDUNDANCY : 5.430 REMARK 200 R MERGE (I) : 0.07100 REMARK 200 R SYM (I) : NULL REMARK 200 FOR THE DATA SET : 14.8000 REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 2.30 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 2.38 REMARK 200 COMPLETENESS FOR SHELL (%) : 93.5 REMARK 200 DATA REDUNDANCY IN SHELL : 5.08 REMARK 200 R MERGE FOR SHELL (I) : 0.32800 REMARK 200 R SYM FOR SHELL (I) : NULL REMARK 200 FOR SHELL : 4.500 REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT REMARK 200 SOFTWARE USED: AMORE REMARK 200 STARTING MODEL: PDB ENTRY 1SK3 REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 64.05 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 3.42 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: PEG MME 2000, NICKEL SULFATE, TRIS REMARK 280 -HCL, PH 8.5, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 293K REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 32 2 1 REMARK 290 REMARK 290 SYMOP SYMMETRY REMARK 290 NNNMMM OPERATOR REMARK 290 1555 X,Y,Z REMARK 290 2555 -Y,X-Y,Z+2/3 REMARK 290 3555 -X+Y,-X,Z+1/3 REMARK 290 4555 Y,X,-Z REMARK 290 5555 X-Y,-Y,-Z+1/3 REMARK 290 6555 -X,-X+Y,-Z+2/3 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 28.03333 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 14.01667 REMARK 290 SMTRY1 4 -0.500000 0.866025 0.000000 0.00000 REMARK 290 SMTRY2 4 0.866025 0.500000 0.000000 0.00000 REMARK 290 SMTRY3 4 0.000000 0.000000 -1.000000 0.00000 REMARK 290 SMTRY1 5 1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 5 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY3 5 0.000000 0.000000 -1.000000 14.01667 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 28.03333 REMARK 290 REMARK 290 REMARK: NULL 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 300 REMARK: IT IS A MONOMER AND THERE IS ONLY ONE MOLECULE IN THE REMARK 300 ASYMMETRIC UNIT 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: DIMERIC REMARK 350 APPLY THE FOLLOWING TO CHAINS: A, P 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 375 REMARK 375 SPECIAL POSITION REMARK 375 THE FOLLOWING ATOMS ARE FOUND TO BE WITHIN 0.15 ANGSTROMS REMARK 375 OF A SYMMETRY RELATED ATOM AND ARE ASSUMED TO BE ON SPECIAL REMARK 375 POSITIONS. REMARK 375 REMARK 375 ATOM RES CSSEQI REMARK 375 HOH A1016 LIES ON A SPECIAL POSITION. 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 GMA P 997 CA - C - N ANGL. DEV. = 18.8 DEGREES REMARK 500 REMARK 500 REMARK: NULL 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 ILE A 181 98.26 74.27 REMARK 500 SER A 263 56.40 -140.30 REMARK 500 LYS A 340 76.22 -67.41 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 NI A 900 NI REMARK 620 N RES CSSEQI ATOM REMARK 620 1 VAL A 177 N REMARK 620 2 VAL A 177 O 84.3 REMARK 620 3 ASP A 296 OD2 157.1 80.6 REMARK 620 4 HIS A 338 NE2 93.9 177.9 100.8 REMARK 620 5 HOH A1007 O 105.1 94.5 93.2 87.0 REMARK 620 6 HOH A1020 O 86.3 87.4 76.0 91.4 168.6 REMARK 620 N 1 2 3 4 5 REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 1SK3 RELATED DB: PDB REMARK 900 CRYSTAL STRUCTURE OF THE C-TERMINAL PGN-BINDING DOMAIN OF HUMAN REMARK 900 PGRP-IALPHA (FORM I) REMARK 900 RELATED ID: 1SK4 RELATED DB: PDB REMARK 900 CRYSTAL STRUCTURE OF THE C-TERMINAL PGN-BINDING DOMAIN OF HUMAN REMARK 900 PGRP-IALPHA (FORM II) DBREF 1TWQ A 177 341 UNP Q96LB9 PGRP3_HUMAN 177 341 DBREF 1TWQ P 996 999 PDB 1TWQ 1TWQ 996 999 SEQRES 1 A 165 VAL CYS PRO ASN ILE ILE LYS ARG SER ALA TRP GLU ALA SEQRES 2 A 165 ARG GLU THR HIS CYS PRO LYS MET ASN LEU PRO ALA LYS SEQRES 3 A 165 TYR VAL ILE ILE ILE HIS THR ALA GLY THR SER CYS THR SEQRES 4 A 165 VAL SER THR ASP CYS GLN THR VAL VAL ARG ASN ILE GLN SEQRES 5 A 165 SER PHE HIS MET ASP THR ARG ASN PHE CYS ASP ILE GLY SEQRES 6 A 165 TYR HIS PHE LEU VAL GLY GLN ASP GLY GLY VAL TYR GLU SEQRES 7 A 165 GLY VAL GLY TRP HIS ILE GLN GLY SER HIS THR TYR GLY SEQRES 8 A 165 PHE ASN ASP ILE ALA LEU GLY ILE ALA PHE ILE GLY TYR SEQRES 9 A 165 PHE VAL GLU LYS PRO PRO ASN ALA ALA ALA LEU GLU ALA SEQRES 10 A 165 ALA GLN ASP LEU ILE GLN CYS ALA VAL VAL GLU GLY TYR SEQRES 11 A 165 LEU THR PRO ASN TYR LEU LEU MET GLY HIS SER ASP VAL SEQRES 12 A 165 VAL ASN ILE LEU SER PRO GLY GLN ALA LEU TYR ASN ILE SEQRES 13 A 165 ILE SER THR TRP PRO HIS PHE LYS HIS SEQRES 1 P 4 ALA GMA LYS NH2 MODRES 1TWQ GMA P 997 GLU 4-AMIDO-4-CARBAMOYL-BUTYRIC ACID HET GMA P 997 9 HET NH2 P 999 1 HET NI A 900 1 HET AMU P1001 19 HETNAM GMA 4-AMIDO-4-CARBAMOYL-BUTYRIC ACID HETNAM NH2 AMINO GROUP HETNAM NI NICKEL (II) ION HETNAM AMU N-ACETYL-BETA-MURAMIC ACID HETSYN AMU N-ACETYL-MURAMIC ACID; BETA-N-ACETYLMURAMIC ACID FORMUL 2 GMA C5 H10 N2 O3 FORMUL 2 NH2 H2 N FORMUL 3 NI NI 2+ FORMUL 4 AMU C11 H19 N O8 FORMUL 5 HOH *48(H2 O) HELIX 1 1 LYS A 183 GLU A 188 5 6 HELIX 2 2 VAL A 216 THR A 234 1 19 HELIX 3 3 ASN A 287 GLU A 304 1 18 HELIX 4 4 HIS A 316 VAL A 320 1 5 HELIX 5 5 GLY A 326 SER A 334 1 9 SHEET 1 A 5 VAL A 252 GLU A 254 0 SHEET 2 A 5 PHE A 244 VAL A 246 -1 N LEU A 245 O TYR A 253 SHEET 3 A 5 ALA A 272 PHE A 277 1 O ALA A 276 N PHE A 244 SHEET 4 A 5 ALA A 201 HIS A 208 1 N ILE A 207 O PHE A 277 SHEET 5 A 5 LEU A 307 GLY A 315 1 O THR A 308 N ALA A 201 SSBOND 1 CYS A 178 CYS A 300 1555 1555 2.02 SSBOND 2 CYS A 194 CYS A 238 1555 1555 2.03 SSBOND 3 CYS A 214 CYS A 220 1555 1555 2.03 LINK C ALA P 996 N GMA P 997 1555 1555 1.36 LINK N ALA P 996 C10 AMU P1001 1555 1555 1.34 LINK C GMA P 997 N LYS P 998 1555 1555 1.34 LINK C LYS P 998 N NH2 P 999 1555 1555 1.31 LINK N VAL A 177 NI NI A 900 1555 1555 2.08 LINK O VAL A 177 NI NI A 900 1555 1555 1.96 LINK OD2 ASP A 296 NI NI A 900 1555 1555 2.16 LINK NE2 HIS A 338 NI NI A 900 6555 1555 2.13 LINK NI NI A 900 O HOH A1007 1555 1555 2.31 LINK NI NI A 900 O HOH A1020 1555 1555 2.35 CISPEP 1 LEU A 199 PRO A 200 0 0.14 CISPEP 2 SER A 324 PRO A 325 0 0.53 CRYST1 104.511 104.511 42.050 90.00 90.00 120.00 P 32 2 1 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 0.009568 0.005524 0.000000 0.00000 SCALE2 0.000000 0.011049 0.000000 0.00000 SCALE3 0.000000 0.000000 0.023781 0.00000