HEADER LIGASE 24-OCT-25 9XBS TITLE ATP-DEPENDENT DIAZOTASE MCO01_40450 BINDING WITH SUBSTRATE COMPND MOL_ID: 1; COMPND 2 MOLECULE: FATTY-ACID-COA LIGASE FADD; COMPND 3 CHAIN: A; COMPND 4 SYNONYM: ATP-DEPENDENT DIAZOTASE MCO01_40450; COMPND 5 ENGINEERED: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: MICROBISPORA CORALLINA; SOURCE 3 ORGANISM_TAXID: 83302; SOURCE 4 GENE: MCO01_40450; SOURCE 5 EXPRESSION_SYSTEM: ESCHERICHIA COLI BL21(DE3); SOURCE 6 EXPRESSION_SYSTEM_TAXID: 469008 KEYWDS DIAZOTASE, ENZYME, ATP-DEPENDENT, LIGASE EXPDTA ELECTRON MICROSCOPY AUTHOR J.NING,S.KAWAI,Y.KATSUYAMA,Y.OHNISHI REVDAT 1 26-AUG-26 9XBS 0 JRNL AUTH J.NING,S.KAWAI,Y.KATSUYAMA,Y.OHNISHI JRNL TITL PROMISCUOUS ATP-DEPENDENT DIAZOTASES DISCOVERED BY JRNL TITL 2 COMPREHENSIVE GENOME MINING BASED ON SEQUENCE SIMILARITY JRNL TITL 3 NETWORK ANALYSIS JRNL REF J.AM.CHEM.SOC. 2026 JRNL REFN ESSN 1520-5126 JRNL DOI 10.1021/JACS.6C11480 REMARK 2 REMARK 2 RESOLUTION. 3.16 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 SOFTWARE PACKAGES : CRYOSPARC, CRYOSPARC, CRYOSPARC, REMARK 3 PHENIX, CRYOSPARC, CRYOSPARC, CRYOSPARC, REMARK 3 PHENIX REMARK 3 RECONSTRUCTION SCHEMA : FOURIER SPACE REMARK 3 REMARK 3 EM MAP-MODEL FITTING AND REFINEMENT REMARK 3 PDB ENTRY : NULL REMARK 3 REFINEMENT SPACE : REAL REMARK 3 REFINEMENT PROTOCOL : RIGID BODY FIT REMARK 3 REFINEMENT TARGET : NULL REMARK 3 OVERALL ANISOTROPIC B VALUE : 82.150 REMARK 3 REMARK 3 FITTING PROCEDURE : NULL REMARK 3 REMARK 3 EM IMAGE RECONSTRUCTION STATISTICS REMARK 3 NOMINAL PIXEL SIZE (ANGSTROMS) : NULL REMARK 3 ACTUAL PIXEL SIZE (ANGSTROMS) : NULL REMARK 3 EFFECTIVE RESOLUTION (ANGSTROMS) : 3.160 REMARK 3 NUMBER OF PARTICLES : 138350 REMARK 3 CTF CORRECTION METHOD : NONE REMARK 3 REMARK 3 EM RECONSTRUCTION MAGNIFICATION CALIBRATION: NULL REMARK 3 REMARK 3 OTHER DETAILS: NULL REMARK 4 REMARK 4 9XBS COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY PDBJ ON 28-OCT-25. REMARK 100 THE DEPOSITION ID IS D_1300065092. REMARK 245 REMARK 245 EXPERIMENTAL DETAILS REMARK 245 RECONSTRUCTION METHOD : SINGLE PARTICLE REMARK 245 SPECIMEN TYPE : NULL REMARK 245 REMARK 245 ELECTRON MICROSCOPE SAMPLE REMARK 245 SAMPLE TYPE : PARTICLE REMARK 245 PARTICLE TYPE : POINT REMARK 245 NAME OF SAMPLE : MONOMER OF MCO01_40450 BINDING REMARK 245 WITH SUBSTRATES REMARK 245 SAMPLE CONCENTRATION (MG ML-1) : 2.50 REMARK 245 SAMPLE SUPPORT DETAILS : NULL REMARK 245 SAMPLE VITRIFICATION DETAILS : NULL REMARK 245 SAMPLE BUFFER : NULL REMARK 245 PH : 7.20 REMARK 245 SAMPLE DETAILS : NULL REMARK 245 REMARK 245 DATA ACQUISITION REMARK 245 DATE OF EXPERIMENT : NULL REMARK 245 NUMBER OF MICROGRAPHS-IMAGES : 9276 REMARK 245 TEMPERATURE (KELVIN) : NULL REMARK 245 MICROSCOPE MODEL : TFS TITAN THEMIS REMARK 245 DETECTOR TYPE : FEI FALCON IV (4K X 4K) REMARK 245 MINIMUM DEFOCUS (NM) : 800.00 REMARK 245 MAXIMUM DEFOCUS (NM) : 2000.00 REMARK 245 MINIMUM TILT ANGLE (DEGREES) : NULL REMARK 245 MAXIMUM TILT ANGLE (DEGREES) : NULL REMARK 245 NOMINAL CS : 2.70 REMARK 245 IMAGING MODE : BRIGHT FIELD REMARK 245 ELECTRON DOSE (ELECTRONS NM**-2) : 5000.00 REMARK 245 ILLUMINATION MODE : SPOT SCAN REMARK 245 NOMINAL MAGNIFICATION : 165000 REMARK 245 CALIBRATED MAGNIFICATION : NULL REMARK 245 SOURCE : FIELD EMISSION GUN REMARK 245 ACCELERATION VOLTAGE (KV) : 300 REMARK 245 IMAGING DETAILS : NULL REMARK 247 REMARK 247 ELECTRON MICROSCOPY REMARK 247 THE COORDINATES IN THIS ENTRY WERE GENERATED FROM ELECTRON REMARK 247 MICROSCOPY DATA. PROTEIN DATA BANK CONVENTIONS REQUIRE REMARK 247 THAT CRYST1 AND SCALE RECORDS BE INCLUDED, BUT THE VALUES REMARK 247 ON THESE RECORDS ARE MEANINGLESS EXCEPT FOR THE CALCULATION REMARK 247 OF THE STRUCTURE FACTORS. 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 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 465 REMARK 465 MISSING RESIDUES REMARK 465 THE FOLLOWING RESIDUES WERE NOT LOCATED IN THE REMARK 465 EXPERIMENT. (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN REMARK 465 IDENTIFIER; SSSEQ=SEQUENCE NUMBER; I=INSERTION CODE.) REMARK 465 REMARK 465 M RES C SSSEQI REMARK 465 MET A -15 REMARK 465 ASN A -14 REMARK 465 HIS A -13 REMARK 465 LYS A -12 REMARK 465 VAL A -11 REMARK 465 HIS A -10 REMARK 465 HIS A -9 REMARK 465 HIS A -8 REMARK 465 HIS A -7 REMARK 465 HIS A -6 REMARK 465 HIS A -5 REMARK 465 ILE A -4 REMARK 465 GLU A -3 REMARK 465 GLY A -2 REMARK 465 ARG A -1 REMARK 465 HIS A 0 REMARK 465 MET A 1 REMARK 465 THR A 2 REMARK 465 LEU A 3 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 THR A 59 -60.04 -93.75 REMARK 500 ASP A 67 44.90 -85.48 REMARK 500 GLU A 68 -40.14 -131.72 REMARK 500 PHE A 150 65.84 -69.59 REMARK 500 LEU A 152 -129.26 56.92 REMARK 500 VAL A 182 -71.75 -118.93 REMARK 500 ASP A 183 -16.20 -146.43 REMARK 500 HIS A 281 -75.24 26.52 REMARK 500 ILE A 296 -110.79 54.62 REMARK 500 ASP A 297 22.12 44.66 REMARK 500 SER A 298 -36.01 -131.49 REMARK 500 LYS A 312 -0.72 65.43 REMARK 500 ASP A 374 -13.40 -140.03 REMARK 500 TYR A 420 140.20 -171.43 REMARK 500 ASN A 426 46.84 -141.28 REMARK 500 TYR A 427 122.91 -39.91 REMARK 500 PRO A 458 44.93 -86.62 REMARK 500 VAL A 524 -88.34 54.88 REMARK 500 LYS A 530 47.90 -91.21 REMARK 500 TYR A 537 33.88 -96.85 REMARK 500 REMARK 500 REMARK: NULL REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: EMD-66710 RELATED DB: EMDB REMARK 900 ATP-DEPENDENT DIAZOTASE MCO01_40450 BINDING WITH SUBSTRATE DBREF1 9XBS A 1 561 UNP A0ABQ4G1Y4_9ACTN DBREF2 9XBS A A0ABQ4G1Y4 1 561 SEQADV 9XBS MET A -15 UNP A0ABQ4G1Y INITIATING METHIONINE SEQADV 9XBS ASN A -14 UNP A0ABQ4G1Y EXPRESSION TAG SEQADV 9XBS HIS A -13 UNP A0ABQ4G1Y EXPRESSION TAG SEQADV 9XBS LYS A -12 UNP A0ABQ4G1Y EXPRESSION TAG SEQADV 9XBS VAL A -11 UNP A0ABQ4G1Y EXPRESSION TAG SEQADV 9XBS HIS A -10 UNP A0ABQ4G1Y EXPRESSION TAG SEQADV 9XBS HIS A -9 UNP A0ABQ4G1Y EXPRESSION TAG SEQADV 9XBS HIS A -8 UNP A0ABQ4G1Y EXPRESSION TAG SEQADV 9XBS HIS A -7 UNP A0ABQ4G1Y EXPRESSION TAG SEQADV 9XBS HIS A -6 UNP A0ABQ4G1Y EXPRESSION TAG SEQADV 9XBS HIS A -5 UNP A0ABQ4G1Y EXPRESSION TAG SEQADV 9XBS ILE A -4 UNP A0ABQ4G1Y EXPRESSION TAG SEQADV 9XBS GLU A -3 UNP A0ABQ4G1Y EXPRESSION TAG SEQADV 9XBS GLY A -2 UNP A0ABQ4G1Y EXPRESSION TAG SEQADV 9XBS ARG A -1 UNP A0ABQ4G1Y EXPRESSION TAG SEQADV 9XBS HIS A 0 UNP A0ABQ4G1Y EXPRESSION TAG SEQRES 1 A 577 MET ASN HIS LYS VAL HIS HIS HIS HIS HIS HIS ILE GLU SEQRES 2 A 577 GLY ARG HIS MET THR LEU SER HIS GLU THR VAL LEU THR SEQRES 3 A 577 PRO GLU GLN ARG ALA ARG LEU ALA ALA ASP PRO ASP LEU SEQRES 4 A 577 GLY GLY GLY ASN LEU LEU THR LYS ALA ILE GLU ALA ASN SEQRES 5 A 577 PRO HIS PRO GLU LEU PRO PHE ILE HIS LEU GLY ARG PRO SEQRES 6 A 577 LEU THR VAL PRO SER GLY GLU GLN ARG THR GLU LEU SER SEQRES 7 A 577 LEU LEU ASP LEU ASP GLU LEU VAL GLN SER TRP SER VAL SEQRES 8 A 577 TRP TYR LEU LYS GLN GLY VAL ARG PRO ARG ASP ARG VAL SEQRES 9 A 577 ALA ILE TYR LEU HIS ASP SER PHE ALA TYR SER VAL HIS SEQRES 10 A 577 PHE TYR ALA LEU ALA GLN ILE GLY ALA VAL ALA VAL LEU SEQRES 11 A 577 VAL ASN SER LYS ALA SER ARG TYR ILE ALA THR GLU LEU SEQRES 12 A 577 CYS ARG GLN THR ASN PRO VAL GLY VAL TYR THR ASP LEU SEQRES 13 A 577 ASP HIS LEU GLU ILE LEU GLY GLU GLU PHE HIS LEU LEU SEQRES 14 A 577 PRO GLY LEU ARG TRP THR GLN VAL ALA GLU GLU LEU PRO SEQRES 15 A 577 ALA PRO PRO PRO ALA LYS LEU PRO GLN GLU ALA ARG PHE SEQRES 16 A 577 ARG HIS VAL ASP GLU ASP PRO VAL SER ILE LEU HIS SER SEQRES 17 A 577 SER GLY THR THR GLY ARG PRO LYS PRO VAL ILE GLN THR SEQRES 18 A 577 HIS ARG SER CYS VAL ALA GLY PRO ARG PHE ARG LEU VAL SEQRES 19 A 577 ASP HIS HIS GLU GLN PRO GLY ALA ILE MET MET THR ALA SEQRES 20 A 577 LEU PRO GLN SER HIS LEU GLY CYS ILE ALA TYR SER THR SEQRES 21 A 577 TYR ALA VAL LEU GLY GLY THR PRO LEU VAL PRO TRP TYR SEQRES 22 A 577 ASP THR SER GLY PRO GLU LEU ALA LYS ALA VAL GLU LYS SEQRES 23 A 577 TYR ARG PRO THR THR VAL MET ALA PHE GLY HIS ALA TYR SEQRES 24 A 577 ALA GLU LEU ALA ALA ALA ASP LEU PRO ALA GLY ALA ILE SEQRES 25 A 577 ASP SER VAL ASN VAL TRP ILE SER ILE GLY ASP ALA VAL SEQRES 26 A 577 HIS GLU LYS HIS ILE LYS THR ILE LEU GLY MET ARG SER SEQRES 27 A 577 ALA ASP ARG ALA PRO ALA SER PHE PHE ASP ARG LEU GLY SEQRES 28 A 577 THR THR GLU LEU GLY TRP GLY VAL LEU LEU LYS VAL ARG SEQRES 29 A 577 THR LEU ALA ASP GLU ARG ASN ASP ARG CYS VAL GLY LYS SEQRES 30 A 577 PRO VAL GLY VAL ALA GLU VAL ALA VAL LEU ARG ARG ASP SEQRES 31 A 577 GLY THR GLU ALA ASP VAL ASN GLU VAL GLY LEU LEU GLY SEQRES 32 A 577 ALA LYS GLY PRO ALA ILE THR ALA GLY TYR TRP SER ASP SEQRES 33 A 577 SER ASP THR THR TYR ARG SER LYS LEU SER GLY PHE TRP SEQRES 34 A 577 LEU THR GLY ASP MET ALA TYR ARG ASP GLU ALA GLY ASN SEQRES 35 A 577 TYR PHE GLN VAL ASP ARG ALA VAL ASP ALA ILE GLU THR SEQRES 36 A 577 PRO THR GLY THR GLY TYR SER VAL PHE MET GLU GLU LEU SEQRES 37 A 577 MET LEU ASN GLU LEU PRO GLU VAL LEU ASP VAL ALA VAL SEQRES 38 A 577 VAL ALA GLY ILE HIS ARG GLY ARG THR ALA PRO VAL ALA SEQRES 39 A 577 VAL VAL THR SER SER ALA ALA ARG PRO ASP ALA GLN LYS SEQRES 40 A 577 LEU LEU ASN GLU ALA ASN GLU ALA LEU ARG ALA ALA GLY SEQRES 41 A 577 HIS PRO GLU LEU THR MET LEU GLU VAL ALA ARG SER GLU SEQRES 42 A 577 GLU ASP PHE PRO VAL GLY VAL THR GLY LYS VAL LEU LYS SEQRES 43 A 577 ARG ARG LEU ARG GLU LYS TYR SER SER LEU SER THR TYR SEQRES 44 A 577 ILE ARG GLU GLY GLY GLY LYS SER ILE GLY THR ILE LEU SEQRES 45 A 577 ASN ASP VAL PHE VAL HET AMP A 601 23 HET DPO A 602 9 HET AHC A 603 12 HETNAM AMP ADENOSINE MONOPHOSPHATE HETNAM DPO DIPHOSPHATE HETNAM AHC 4-AMINOHYDROCINNAMIC ACID FORMUL 2 AMP C10 H14 N5 O7 P FORMUL 3 DPO O7 P2 4- FORMUL 4 AHC C9 H11 N O2 HELIX 1 AA1 THR A 10 ALA A 19 1 10 HELIX 2 AA2 ASN A 27 GLU A 34 1 8 HELIX 3 AA3 SER A 62 GLN A 80 1 19 HELIX 4 AA4 PHE A 96 LEU A 105 1 10 HELIX 5 AA5 SER A 120 THR A 131 1 12 HELIX 6 AA6 ASP A 139 ILE A 145 1 7 HELIX 7 AA7 PRO A 174 ARG A 178 5 5 HELIX 8 AA8 ARG A 207 GLY A 212 1 6 HELIX 9 AA9 GLY A 212 HIS A 220 1 9 HELIX 10 AB1 HIS A 236 GLY A 250 1 15 HELIX 11 AB2 SER A 260 TYR A 271 1 12 HELIX 12 AB3 HIS A 281 ALA A 289 1 9 HELIX 13 AB4 HIS A 313 LEU A 318 1 6 HELIX 14 AB5 ASP A 400 ARG A 406 1 7 HELIX 15 AB6 VAL A 434 ALA A 436 5 3 HELIX 16 AB7 SER A 446 GLU A 456 1 11 HELIX 17 AB8 ASP A 488 ALA A 503 1 16 HELIX 18 AB9 SER A 516 PHE A 520 5 5 HELIX 19 AC1 ARG A 531 TYR A 537 1 7 HELIX 20 AC2 SER A 539 GLU A 546 1 8 SHEET 1 AA1 2 LEU A 50 THR A 51 0 SHEET 2 AA1 2 GLN A 57 ARG A 58 -1 O ARG A 58 N LEU A 50 SHEET 1 AA2 6 TRP A 158 VAL A 161 0 SHEET 2 AA2 6 GLY A 135 THR A 138 1 N THR A 138 O GLN A 160 SHEET 3 AA2 6 ARG A 87 TYR A 91 1 N ALA A 89 O GLY A 135 SHEET 4 AA2 6 VAL A 111 LEU A 114 1 O VAL A 113 N ILE A 90 SHEET 5 AA2 6 PRO A 186 LEU A 190 1 O ILE A 189 N LEU A 114 SHEET 6 AA2 6 VAL A 202 THR A 205 -1 O GLN A 204 N SER A 188 SHEET 1 AA3 6 LEU A 253 PRO A 255 0 SHEET 2 AA3 6 MET A 228 THR A 230 1 N MET A 228 O VAL A 254 SHEET 3 AA3 6 THR A 275 ALA A 278 1 O THR A 275 N MET A 229 SHEET 4 AA3 6 VAL A 301 SER A 304 1 O ILE A 303 N VAL A 276 SHEET 5 AA3 6 SER A 329 LEU A 334 1 O PHE A 331 N TRP A 302 SHEET 6 AA3 6 LEU A 344 ARG A 348 -1 O ARG A 348 N PHE A 330 SHEET 1 AA4 4 GLU A 367 LEU A 371 0 SHEET 2 AA4 4 GLY A 384 LYS A 389 -1 O LEU A 385 N LEU A 371 SHEET 3 AA4 4 PHE A 412 TYR A 420 -1 O ALA A 419 N GLY A 384 SHEET 4 AA4 4 LYS A 408 LEU A 409 -1 N LEU A 409 O PHE A 412 SHEET 1 AA5 4 GLU A 367 LEU A 371 0 SHEET 2 AA5 4 GLY A 384 LYS A 389 -1 O LEU A 385 N LEU A 371 SHEET 3 AA5 4 PHE A 412 TYR A 420 -1 O ALA A 419 N GLY A 384 SHEET 4 AA5 4 PHE A 428 ARG A 432 -1 O ASP A 431 N MET A 418 SHEET 1 AA6 4 VAL A 463 ILE A 469 0 SHEET 2 AA6 4 THR A 474 VAL A 480 -1 O VAL A 479 N ALA A 464 SHEET 3 AA6 4 MET A 510 VAL A 513 1 O GLU A 512 N VAL A 480 SHEET 4 AA6 4 ILE A 552 GLY A 553 -1 O GLY A 553 N LEU A 511 CRYST1 1.000 1.000 1.000 90.00 90.00 90.00 P 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 CONECT 4292 4293 4294 4295 4296 CONECT 4293 4292 CONECT 4294 4292 CONECT 4295 4292 CONECT 4296 4292 4297 CONECT 4297 4296 4298 CONECT 4298 4297 4299 4300 CONECT 4299 4298 4304 CONECT 4300 4298 4301 4302 CONECT 4301 4300 CONECT 4302 4300 4303 4304 CONECT 4303 4302 CONECT 4304 4299 4302 4305 CONECT 4305 4304 4306 4314 CONECT 4306 4305 4307 CONECT 4307 4306 4308 CONECT 4308 4307 4309 4314 CONECT 4309 4308 4310 4311 CONECT 4310 4309 CONECT 4311 4309 4312 CONECT 4312 4311 4313 CONECT 4313 4312 4314 CONECT 4314 4305 4308 4313 CONECT 4315 4316 4317 4318 4319 CONECT 4316 4315 CONECT 4317 4315 CONECT 4318 4315 CONECT 4319 4315 4320 CONECT 4320 4319 4321 4322 4323 CONECT 4321 4320 CONECT 4322 4320 CONECT 4323 4320 CONECT 4324 4325 4328 CONECT 4325 4324 4326 4327 CONECT 4326 4325 CONECT 4327 4325 CONECT 4328 4324 4329 CONECT 4329 4328 4330 4331 CONECT 4330 4329 4332 CONECT 4331 4329 4333 CONECT 4332 4330 4334 CONECT 4333 4331 4334 CONECT 4334 4332 4333 4335 CONECT 4335 4334 MASTER 162 0 3 20 26 0 0 6 4334 1 44 45 END