HEADER HYDROLASE 04-DEC-04 2BF6 TITLE ATOMIC RESOLUTION STRUCTURE OF THE BACTERIAL SIALIDASE NANI FROM TITLE 2 CLOSTRIDIUM PERFRINGENS IN COMPLEX WITH ALPHA-SIALIC ACID (NEU5AC). COMPND MOL_ID: 1; COMPND 2 MOLECULE: EXO-ALPHA-SIALIDASE; COMPND 3 CHAIN: A; COMPND 4 FRAGMENT: RESIDUES 243-691; COMPND 5 SYNONYM: SIALIDASE; COMPND 6 EC: 3.2.1.18; COMPND 7 ENGINEERED: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: CLOSTRIDIUM PERFRINGENS; SOURCE 3 ORGANISM_TAXID: 1502; SOURCE 4 ATCC: 10543; SOURCE 5 EXPRESSION_SYSTEM: ESCHERICHIA COLI BL21(DE3); SOURCE 6 EXPRESSION_SYSTEM_TAXID: 469008; SOURCE 7 EXPRESSION_SYSTEM_VARIANT: ROSETTA PLYSS; SOURCE 8 EXPRESSION_SYSTEM_VECTOR: PMAL-C2 KEYWDS SIALIDASE, CLOSTRIDIUM PERFRINGENS, SIALIC ACID, HYDROLASE EXPDTA X-RAY DIFFRACTION AUTHOR S.NEWSTEAD,G.L.TAYLOR REVDAT 6 13-DEC-23 2BF6 1 REMARK HETSYN REVDAT 5 29-JUL-20 2BF6 1 COMPND REMARK HETNAM LINK REVDAT 5 2 1 SITE REVDAT 4 22-MAY-19 2BF6 1 REMARK REVDAT 3 07-MAR-18 2BF6 1 SOURCE REMARK REVDAT 2 24-FEB-09 2BF6 1 VERSN REVDAT 1 09-MAR-06 2BF6 0 JRNL AUTH S.L.NEWSTEAD,J.A.POTTER,J.C.WILSON,G.XU,C.H.CHIEN,A.G.WATTS, JRNL AUTH 2 S.G.WITHERS,G.L.TAYLOR JRNL TITL THE STRUCTURE OF CLOSTRIDIUM PERFRINGENS NANI SIALIDASE AND JRNL TITL 2 ITS CATALYTIC INTERMEDIATES. JRNL REF J.BIOL.CHEM. V. 283 9080 2008 JRNL REFN ISSN 0021-9258 JRNL PMID 18218621 JRNL DOI 10.1074/JBC.M710247200 REMARK 2 REMARK 2 RESOLUTION. 0.97 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : SHELXL-97 REMARK 3 AUTHORS : G.M.SHELDRICK REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 0.97 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 57.00 REMARK 3 DATA CUTOFF (SIGMA(F)) : 0.000 REMARK 3 COMPLETENESS FOR RANGE (%) : 91.8 REMARK 3 CROSS-VALIDATION METHOD : FREE R-VALUE REMARK 3 FREE R VALUE TEST SET SELECTION : RANDOM REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT (NO CUTOFF). REMARK 3 R VALUE (WORKING + TEST SET, NO CUTOFF) : 0.113 REMARK 3 R VALUE (WORKING SET, NO CUTOFF) : 0.113 REMARK 3 FREE R VALUE (NO CUTOFF) : 0.133 REMARK 3 FREE R VALUE TEST SET SIZE (%, NO CUTOFF) : 4.900 REMARK 3 FREE R VALUE TEST SET COUNT (NO CUTOFF) : 13089 REMARK 3 TOTAL NUMBER OF REFLECTIONS (NO CUTOFF) : 264777 REMARK 3 REMARK 3 FIT/AGREEMENT OF MODEL FOR DATA WITH F>4SIG(F). REMARK 3 R VALUE (WORKING + TEST SET, F>4SIG(F)) : 0.110 REMARK 3 R VALUE (WORKING SET, F>4SIG(F)) : 0.110 REMARK 3 FREE R VALUE (F>4SIG(F)) : 0.130 REMARK 3 FREE R VALUE TEST SET SIZE (%, F>4SIG(F)) : 5.000 REMARK 3 FREE R VALUE TEST SET COUNT (F>4SIG(F)) : 12074 REMARK 3 TOTAL NUMBER OF REFLECTIONS (F>4SIG(F)) : 243689 REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 3524 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 35 REMARK 3 SOLVENT ATOMS : 485 REMARK 3 REMARK 3 MODEL REFINEMENT. REMARK 3 OCCUPANCY SUM OF NON-HYDROGEN ATOMS : 4037.5 REMARK 3 OCCUPANCY SUM OF HYDROGEN ATOMS : 3285.2 REMARK 3 NUMBER OF DISCRETELY DISORDERED RESIDUES : 11 REMARK 3 NUMBER OF LEAST-SQUARES PARAMETERS : 36804 REMARK 3 NUMBER OF RESTRAINTS : 44962 REMARK 3 REMARK 3 RMS DEVIATIONS FROM RESTRAINT TARGET VALUES. REMARK 3 BOND LENGTHS (A) : 0.016 REMARK 3 ANGLE DISTANCES (A) : 0.031 REMARK 3 SIMILAR DISTANCES (NO TARGET VALUES) (A) : 0.000 REMARK 3 DISTANCES FROM RESTRAINT PLANES (A) : 0.035 REMARK 3 ZERO CHIRAL VOLUMES (A**3) : 0.103 REMARK 3 NON-ZERO CHIRAL VOLUMES (A**3) : 0.110 REMARK 3 ANTI-BUMPING DISTANCE RESTRAINTS (A) : 0.081 REMARK 3 RIGID-BOND ADP COMPONENTS (A**2) : 0.006 REMARK 3 SIMILAR ADP COMPONENTS (A**2) : 0.032 REMARK 3 APPROXIMATELY ISOTROPIC ADPS (A**2) : 0.092 REMARK 3 REMARK 3 BULK SOLVENT MODELING. REMARK 3 METHOD USED: NULL REMARK 3 REMARK 3 STEREOCHEMISTRY TARGET VALUES : ENGH AND HUBER REMARK 3 SPECIAL CASE: NULL REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: ANISOTROPIC REFINEMENT REDUCED FREE R REMARK 3 (NO CUTOFF) BY 2.0 REMARK 4 REMARK 4 2BF6 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY PDBE ON 04-DEC-04. REMARK 100 THE DEPOSITION ID IS D_1290021867. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 20-FEB-04 REMARK 200 TEMPERATURE (KELVIN) : 100.0 REMARK 200 PH : 7.00 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : Y REMARK 200 RADIATION SOURCE : ESRF REMARK 200 BEAMLINE : ID14-1 REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 0.934 REMARK 200 MONOCHROMATOR : DIAMOND (111), GE(220) REMARK 200 OPTICS : MIRRORS REMARK 200 REMARK 200 DETECTOR TYPE : CCD REMARK 200 DETECTOR MANUFACTURER : ADSC CCD REMARK 200 INTENSITY-INTEGRATION SOFTWARE : MOSFLM REMARK 200 DATA SCALING SOFTWARE : SCALA REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 290992 REMARK 200 RESOLUTION RANGE HIGH (A) : 0.970 REMARK 200 RESOLUTION RANGE LOW (A) : 57.000 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : NULL REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 91.0 REMARK 200 DATA REDUNDANCY : 3.800 REMARK 200 R MERGE (I) : 0.10000 REMARK 200 R SYM (I) : NULL REMARK 200 FOR THE DATA SET : 11.8000 REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 0.97 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 1.03 REMARK 200 COMPLETENESS FOR SHELL (%) : 87.0 REMARK 200 DATA REDUNDANCY IN SHELL : 3.10 REMARK 200 R MERGE FOR SHELL (I) : 0.19000 REMARK 200 R SYM FOR SHELL (I) : NULL REMARK 200 FOR SHELL : 5.000 REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT REMARK 200 SOFTWARE USED: CNS REMARK 200 STARTING MODEL: PDB ENTRY 1SLL REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 49.00 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.50 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: 20 % PEG 3350, 0.2M POTASSIUM NITRATE, REMARK 280 PH 7.00 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 -X+1/2,-Y,Z+1/2 REMARK 290 3555 -X,Y+1/2,-Z+1/2 REMARK 290 4555 X+1/2,-Y+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 -1.000000 0.000000 0.000000 48.49050 REMARK 290 SMTRY2 2 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY3 2 0.000000 0.000000 1.000000 36.34700 REMARK 290 SMTRY1 3 -1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 3 0.000000 1.000000 0.000000 34.70650 REMARK 290 SMTRY3 3 0.000000 0.000000 -1.000000 36.34700 REMARK 290 SMTRY1 4 1.000000 0.000000 0.000000 48.49050 REMARK 290 SMTRY2 4 0.000000 -1.000000 0.000000 34.70650 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 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: MONOMERIC REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: MONOMERIC REMARK 350 SOFTWARE USED: PQS REMARK 350 APPLY THE FOLLOWING TO CHAINS: A 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 470 REMARK 470 MISSING ATOM REMARK 470 THE FOLLOWING RESIDUES HAVE MISSING ATOMS (M=MODEL NUMBER; REMARK 470 RES=RESIDUE NAME; C=CHAIN IDENTIFIER; SSEQ=SEQUENCE NUMBER; REMARK 470 I=INSERTION CODE): REMARK 470 M RES CSSEQI ATOMS REMARK 470 GLY A 691 CA C O REMARK 480 REMARK 480 ZERO OCCUPANCY ATOM REMARK 480 THE FOLLOWING RESIDUES HAVE ATOMS MODELED WITH ZERO REMARK 480 OCCUPANCY. THE LOCATION AND PROPERTIES OF THESE ATOMS REMARK 480 MAY NOT BE RELIABLE. (M=MODEL NUMBER; RES=RESIDUE NAME; REMARK 480 C=CHAIN IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE): REMARK 480 M RES C SSEQI ATOMS REMARK 480 GLU A 336 OE2 REMARK 480 LYS A 528 NZ 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 DISTANCE REMARK 500 CE MET A 683 CE2 TYR A 687 1.87 REMARK 500 O HOH A 2190 O HOH A 2191 2.01 REMARK 500 OE2 GLU A 445 O HOH A 2235 2.17 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 ASP A 253 CB - CG - OD1 ANGL. DEV. = -5.9 DEGREES REMARK 500 LYS A 274 CB - CG - CD ANGL. DEV. = 21.5 DEGREES REMARK 500 GLU A 313 OE1 - CD - OE2 ANGL. DEV. = -16.4 DEGREES REMARK 500 GLU A 313 CG - CD - OE1 ANGL. DEV. = 13.1 DEGREES REMARK 500 ILE A 327 CA - CB - CG2 ANGL. DEV. = -12.2 DEGREES REMARK 500 ASP A 392 CB - CG - OD1 ANGL. DEV. = -5.4 DEGREES REMARK 500 ASP A 392 CB - CG - OD2 ANGL. DEV. = 5.4 DEGREES REMARK 500 GLU A 397 OE1 - CD - OE2 ANGL. DEV. = -7.3 DEGREES REMARK 500 ASP A 456 CB - CG - OD2 ANGL. DEV. = -8.1 DEGREES REMARK 500 ARG A 613 NE - CZ - NH2 ANGL. DEV. = -4.9 DEGREES REMARK 500 ARG A 613 NE - CZ - NH2 ANGL. DEV. = -4.1 DEGREES REMARK 500 TYR A 655 CB - CG - CD2 ANGL. DEV. = -3.8 DEGREES REMARK 500 TYR A 655 CB - CG - CD1 ANGL. DEV. = 4.2 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 267 73.76 78.95 REMARK 500 ASN A 294 49.05 -89.69 REMARK 500 ASN A 295 -177.23 -171.04 REMARK 500 ASP A 328 89.33 78.90 REMARK 500 LYS A 350 -6.15 87.93 REMARK 500 ASP A 414 -162.32 -174.15 REMARK 500 LYS A 459 -71.94 -92.98 REMARK 500 THR A 538 -124.18 -124.08 REMARK 500 TYR A 587 65.13 78.42 REMARK 500 ALA A 654 -114.46 -123.65 REMARK 500 SER A 675 26.31 -160.05 REMARK 500 GLU A 676 -97.58 -120.06 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 CA A1693 CA REMARK 620 N RES CSSEQI ATOM REMARK 620 1 ASP A 296 OD1 REMARK 620 2 ASP A 298 OD1 105.3 REMARK 620 3 ASP A 319 OD1 168.5 81.2 REMARK 620 4 TYR A 320 O 98.7 134.8 82.7 REMARK 620 5 HOH A2039 O 79.7 146.9 89.7 74.5 REMARK 620 6 HOH A2042 O 87.0 76.7 85.3 143.2 70.8 REMARK 620 7 HOH A2071 O 83.4 70.1 108.0 75.4 142.5 141.4 REMARK 620 N 1 2 3 4 5 6 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 CA A1694 CA REMARK 620 N RES CSSEQI ATOM REMARK 620 1 ASP A 515 O REMARK 620 2 TRP A 573 O 154.8 REMARK 620 3 HOH A2193 O 116.8 87.2 REMARK 620 4 HOH A2303 O 79.1 115.8 77.9 REMARK 620 5 HOH A2306 O 81.8 81.3 147.0 79.6 REMARK 620 6 HOH A2309 O 83.6 78.5 115.9 161.6 92.0 REMARK 620 N 1 2 3 4 5 REMARK 700 REMARK 700 SHEET REMARK 700 THE SHEET STRUCTURE OF THIS MOLECULE IS BIFURCATED. IN REMARK 700 ORDER TO REPRESENT THIS FEATURE IN THE SHEET RECORDS BELOW, REMARK 700 TWO SHEETS ARE DEFINED. DBREF 2BF6 A 243 691 UNP Q59310 Q59310 243 691 SEQRES 1 A 449 VAL GLU GLY ALA VAL LYS THR GLU PRO VAL ASP LEU PHE SEQRES 2 A 449 HIS PRO GLY PHE LEU ASN SER SER ASN TYR ARG ILE PRO SEQRES 3 A 449 ALA LEU PHE LYS THR LYS GLU GLY THR LEU ILE ALA SER SEQRES 4 A 449 ILE ASP ALA ARG ARG HIS GLY GLY ALA ASP ALA PRO ASN SEQRES 5 A 449 ASN ASP ILE ASP THR ALA VAL ARG ARG SER GLU ASP GLY SEQRES 6 A 449 GLY LYS THR TRP ASP GLU GLY GLN ILE ILE MET ASP TYR SEQRES 7 A 449 PRO ASP LYS SER SER VAL ILE ASP THR THR LEU ILE GLN SEQRES 8 A 449 ASP ASP GLU THR GLY ARG ILE PHE LEU LEU VAL THR HIS SEQRES 9 A 449 PHE PRO SER LYS TYR GLY PHE TRP ASN ALA GLY LEU GLY SEQRES 10 A 449 SER GLY PHE LYS ASN ILE ASP GLY LYS GLU TYR LEU CYS SEQRES 11 A 449 LEU TYR ASP SER SER GLY LYS GLU PHE THR VAL ARG GLU SEQRES 12 A 449 ASN VAL VAL TYR ASP LYS ASP SER ASN LYS THR GLU TYR SEQRES 13 A 449 THR THR ASN ALA LEU GLY ASP LEU PHE LYS ASN GLY THR SEQRES 14 A 449 LYS ILE ASP ASN ILE ASN SER SER THR ALA PRO LEU LYS SEQRES 15 A 449 ALA LYS GLY THR SER TYR ILE ASN LEU VAL TYR SER ASP SEQRES 16 A 449 ASP ASP GLY LYS THR TRP SER GLU PRO GLN ASN ILE ASN SEQRES 17 A 449 PHE GLN VAL LYS LYS ASP TRP MET LYS PHE LEU GLY ILE SEQRES 18 A 449 ALA PRO GLY ARG GLY ILE GLN ILE LYS ASN GLY GLU HIS SEQRES 19 A 449 LYS GLY ARG ILE VAL VAL PRO VAL TYR TYR THR ASN GLU SEQRES 20 A 449 LYS GLY LYS GLN SER SER ALA VAL ILE TYR SER ASP ASP SEQRES 21 A 449 SER GLY LYS ASN TRP THR ILE GLY GLU SER PRO ASN ASP SEQRES 22 A 449 ASN ARG LYS LEU GLU ASN GLY LYS ILE ILE ASN SER LYS SEQRES 23 A 449 THR LEU SER ASP ASP ALA PRO GLN LEU THR GLU CYS GLN SEQRES 24 A 449 VAL VAL GLU MET PRO ASN GLY GLN LEU LYS LEU PHE MET SEQRES 25 A 449 ARG ASN LEU SER GLY TYR LEU ASN ILE ALA THR SER PHE SEQRES 26 A 449 ASP GLY GLY ALA THR TRP ASP GLU THR VAL GLU LYS ASP SEQRES 27 A 449 THR ASN VAL LEU GLU PRO TYR CYS GLN LEU SER VAL ILE SEQRES 28 A 449 ASN TYR SER GLN LYS VAL ASP GLY LYS ASP ALA VAL ILE SEQRES 29 A 449 PHE SER ASN PRO ASN ALA ARG SER ARG SER ASN GLY THR SEQRES 30 A 449 VAL ARG ILE GLY LEU ILE ASN GLN VAL GLY THR TYR GLU SEQRES 31 A 449 ASN GLY GLU PRO LYS TYR GLU PHE ASP TRP LYS TYR ASN SEQRES 32 A 449 LYS LEU VAL LYS PRO GLY TYR TYR ALA TYR SER CYS LEU SEQRES 33 A 449 THR GLU LEU SER ASN GLY ASN ILE GLY LEU LEU TYR GLU SEQRES 34 A 449 GLY THR PRO SER GLU GLU MET SER TYR ILE GLU MET ASN SEQRES 35 A 449 LEU LYS TYR LEU GLU SER GLY HET SIA A1692 21 HET CA A1693 1 HET CA A1694 1 HET GOL A1695 6 HET GOL A1696 6 HETNAM SIA N-ACETYL-ALPHA-NEURAMINIC ACID HETNAM CA CALCIUM ION HETNAM GOL GLYCEROL HETSYN SIA N-ACETYLNEURAMINIC ACID; SIALIC ACID; ALPHA-SIALIC HETSYN 2 SIA ACID; O-SIALIC ACID HETSYN GOL GLYCERIN; PROPANE-1,2,3-TRIOL FORMUL 2 SIA C11 H19 N O9 FORMUL 3 CA 2(CA 2+) FORMUL 5 GOL 2(C3 H8 O3) FORMUL 7 HOH *485(H2 O) HELIX 1 1 GLY A 258 SER A 262 5 5 HELIX 2 2 ILE A 449 LYS A 454 1 6 HELIX 3 3 ASN A 684 GLU A 689 1 6 SHEET 1 AA 4 VAL A 252 PHE A 255 0 SHEET 2 AA 4 MET A 678 MET A 683 -1 O MET A 678 N LEU A 254 SHEET 3 AA 4 ILE A 666 TYR A 670 -1 O ILE A 666 N MET A 683 SHEET 4 AA 4 SER A 656 GLU A 660 -1 O CYS A 657 N LEU A 669 SHEET 1 AB 4 ASN A 264 LYS A 272 0 SHEET 2 AB 4 LEU A 278 ARG A 285 -1 O ILE A 279 N PHE A 271 SHEET 3 AB 4 ILE A 297 SER A 304 -1 O ASP A 298 N ALA A 284 SHEET 4 AB 4 GLN A 315 MET A 318 -1 O GLN A 315 N VAL A 301 SHEET 1 AC 5 GLN A 447 ASN A 448 0 SHEET 2 AC 5 TYR A 430 SER A 436 -1 O LEU A 433 N GLN A 447 SHEET 3 AC 5 ILE A 340 PHE A 347 -1 O ILE A 340 N SER A 436 SHEET 4 AC 5 SER A 325 GLN A 333 -1 O SER A 325 N PHE A 347 SHEET 5 AC 5 GLY A 466 ARG A 467 1 O GLY A 466 N LEU A 331 SHEET 1 AD 7 PHE A 362 ILE A 365 0 SHEET 2 AD 7 LYS A 368 TYR A 374 -1 O LYS A 368 N ILE A 365 SHEET 3 AD 7 GLU A 380 ARG A 384 -1 O PHE A 381 N LEU A 373 SHEET 4 AD 7 VAL A 387 TYR A 389 -1 O VAL A 387 N ARG A 384 SHEET 5 AD 7 LYS A 395 THR A 400 -1 N THR A 396 O VAL A 388 SHEET 6 AD 7 ASP A 405 LYS A 408 -1 O PHE A 407 N THR A 399 SHEET 7 AD 7 THR A 411 ASN A 415 -1 O THR A 411 N LYS A 408 SHEET 1 AE 3 PHE A 362 ILE A 365 0 SHEET 2 AE 3 LYS A 368 TYR A 374 -1 O LYS A 368 N ILE A 365 SHEET 3 AE 3 LYS A 424 ALA A 425 -1 O LYS A 424 N TYR A 374 SHEET 1 AF 3 LEU A 461 ILE A 463 0 SHEET 2 AF 3 ILE A 480 THR A 487 -1 O TYR A 485 N GLY A 462 SHEET 3 AF 3 ILE A 469 GLN A 470 -1 O ILE A 469 N VAL A 481 SHEET 1 AG 4 LEU A 461 ILE A 463 0 SHEET 2 AG 4 ILE A 480 THR A 487 -1 O TYR A 485 N GLY A 462 SHEET 3 AG 4 GLN A 493 SER A 500 -1 O SER A 494 N TYR A 486 SHEET 4 AG 4 THR A 508 ILE A 509 -1 O THR A 508 N TYR A 499 SHEET 1 AH 2 ARG A 517 LYS A 518 0 SHEET 2 AH 2 ILE A 524 ILE A 525 -1 N ILE A 525 O ARG A 517 SHEET 1 AI 4 LEU A 537 GLU A 544 0 SHEET 2 AI 4 LEU A 550 ASN A 556 -1 O LYS A 551 N VAL A 543 SHEET 3 AI 4 TYR A 560 SER A 566 -1 O ASN A 562 N MET A 554 SHEET 4 AI 4 GLU A 578 LEU A 584 -1 O GLU A 578 N ILE A 563 SHEET 1 AJ 4 SER A 591 ASN A 594 0 SHEET 2 AJ 4 ALA A 604 PRO A 610 -1 O ILE A 606 N ILE A 593 SHEET 3 AJ 4 SER A 616 THR A 630 -1 O THR A 619 N ASN A 609 SHEET 4 AJ 4 PRO A 636 TYR A 652 -1 O LYS A 637 N VAL A 628 LINK OD1 ASP A 296 CA CA A1693 1555 1555 2.31 LINK OD1 ASP A 298 CA CA A1693 1555 1555 2.40 LINK OD1 ASP A 319 CA CA A1693 1555 1555 2.33 LINK O TYR A 320 CA CA A1693 1555 1555 2.37 LINK O ASP A 515 CA CA A1694 1555 1555 2.58 LINK O TRP A 573 CA CA A1694 1555 1555 2.63 LINK CA CA A1693 O HOH A2039 1555 1555 2.49 LINK CA CA A1693 O HOH A2042 1555 1555 2.43 LINK CA CA A1693 O HOH A2071 1555 1555 2.45 LINK CA CA A1694 O HOH A2193 1555 1555 2.74 LINK CA CA A1694 O HOH A2303 1555 1555 2.78 LINK CA CA A1694 O HOH A2306 1555 1555 2.79 LINK CA CA A1694 O HOH A2309 1555 1555 2.64 CISPEP 1 ALA A 292 PRO A 293 0 11.36 CRYST1 96.981 69.413 72.694 90.00 90.00 90.00 P 21 21 21 4 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 0.010311 0.000000 0.000000 0.00000 SCALE2 0.000000 0.014407 0.000000 0.00000 SCALE3 0.000000 0.000000 0.013756 0.00000