HEADER TOXIN 27-OCT-25 9XE5 TITLE DEFENSIN-LIKE INHIBITOR OF MAMMALIAN AMYLASES, MAGNIFICAMIDE-2, FROM TITLE 2 THE SEA ANEMONE HETERACTIS MAGNIFICA COMPND MOL_ID: 1; COMPND 2 MOLECULE: ALPHA-AMYLASE INHIBITOR MAGNIFICAMIDE; COMPND 3 CHAIN: A; COMPND 4 ENGINEERED: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: HETERACTIS MAGNIFICA; SOURCE 3 ORGANISM_COMMON: MAGNIFICENT SEA ANEMONE; SOURCE 4 ORGANISM_TAXID: 38281; SOURCE 5 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 6 EXPRESSION_SYSTEM_TAXID: 562 KEYWDS HYDROLASE INHIBITOR, BETA-DEFENSIN, MAMMALIAN ALPHA-AMYLASE KEYWDS 2 INHIBITOR, TOXIN EXPDTA SOLUTION NMR NUMMDL 20 AUTHOR A.MENSHOV,A.PARAMONOV,D.POPKOVA,Z.SHENKAREV,E.LEYCHENKO REVDAT 1 28-OCT-26 9XE5 0 JRNL AUTH D.POPKOVA,A.MENSHOV,O.SINTSOVA,A.PARAMONOV,R.KALINA, JRNL AUTH 2 I.PANINA,A.KALINOVSKII,D.OSMAKOV,M.SHAMATOVA,P.DMITRENOK, JRNL AUTH 3 A.CHUGUNOV,S.KOZLOV,R.EFREMOV,Z.SHENKAREV,I.GLADKIKH, JRNL AUTH 4 E.LEYCHENKO JRNL TITL NOVEL BETA-DEFENSIN-LIKE MARINE MINIPROTEIN MAGNIFICAMIDE-2 JRNL TITL 2 WITH A REMARKABLE POTENCY IN INHIBITING MAMMALIAN JRNL TITL 3 ALPHA-AMYLASES. JRNL REF INT.J.BIOL.MACROMOL. V. 376 53418 2026 JRNL REFN ISSN 0141-8130 JRNL PMID 42419540 JRNL DOI 10.1016/J.IJBIOMAC.2026.153418 REMARK 2 REMARK 2 RESOLUTION. NOT APPLICABLE. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : CYANA 3.98.13 REMARK 3 AUTHORS : GUNTERT, MUMENTHALER AND WUTHRICH REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: NULL REMARK 4 REMARK 4 9XE5 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY PDBJ ON 05-NOV-25. REMARK 100 THE DEPOSITION ID IS D_1300065095. REMARK 210 REMARK 210 EXPERIMENTAL DETAILS REMARK 210 EXPERIMENT TYPE : NMR REMARK 210 TEMPERATURE (KELVIN) : 303 REMARK 210 PH : 6.0 REMARK 210 IONIC STRENGTH : 1.5 REMARK 210 PRESSURE : AMBIENT ATM REMARK 210 SAMPLE CONTENTS : 0.46 MM [U-15N] MAGNIFICAMIDE-2, REMARK 210 1.5 MM SODIUM AZIDE, 95% H2O/5% REMARK 210 D2O; 1.0 MM MAGNIFICAMIDE-2, 100% REMARK 210 D2O REMARK 210 REMARK 210 NMR EXPERIMENTS CONDUCTED : 2D 1H-15N HSQC; 2D 1H-13C HSQC REMARK 210 ALIPHATIC; 3D 1H-15N TOCSY; 3D REMARK 210 1H-15N NOESY; 3D HNHA; 3D HNHB; REMARK 210 2D 1H-1H NOESY; 2D 1H-1H TOCSY REMARK 210 SPECTROMETER FIELD STRENGTH : 800 MHZ REMARK 210 SPECTROMETER MODEL : AVANCE III REMARK 210 SPECTROMETER MANUFACTURER : BRUKER REMARK 210 REMARK 210 STRUCTURE DETERMINATION. REMARK 210 SOFTWARE USED : CYANA 3.98.13, TOPSPIN, CARA REMARK 210 1.8, MDDNMR REMARK 210 METHOD USED : TORSION ANGLE DYNAMICS REMARK 210 REMARK 210 CONFORMERS, NUMBER CALCULATED : 200 REMARK 210 CONFORMERS, NUMBER SUBMITTED : 20 REMARK 210 CONFORMERS, SELECTION CRITERIA : STRUCTURES WITH THE LEAST REMARK 210 RESTRAINT VIOLATIONS REMARK 210 REMARK 210 BEST REPRESENTATIVE CONFORMER IN THIS ENSEMBLE : 1 REMARK 210 REMARK 210 REMARK: NULL REMARK 215 REMARK 215 NMR STUDY REMARK 215 THE COORDINATES IN THIS ENTRY WERE GENERATED FROM SOLUTION REMARK 215 NMR DATA. PROTEIN DATA BANK CONVENTIONS REQUIRE THAT REMARK 215 CRYST1 AND SCALE RECORDS BE INCLUDED, BUT THE VALUES ON REMARK 215 THESE RECORDS ARE MEANINGLESS. 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: PISA 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 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 1 ILE A 8 -66.53 -101.08 REMARK 500 1 ALA A 21 -169.64 -100.23 REMARK 500 1 MET A 30 -45.89 -131.89 REMARK 500 2 ILE A 8 -65.31 -103.03 REMARK 500 2 ALA A 21 -169.52 -100.10 REMARK 500 3 ILE A 8 -66.53 -101.32 REMARK 500 3 MET A 30 -41.88 -141.94 REMARK 500 4 TYR A 9 149.25 -174.61 REMARK 500 5 ILE A 8 -69.77 -100.20 REMARK 500 5 MET A 30 -41.12 -135.93 REMARK 500 6 ILE A 8 -61.44 -97.04 REMARK 500 6 MET A 30 -41.25 -135.65 REMARK 500 7 ILE A 8 -69.22 -105.30 REMARK 500 7 CYS A 33 37.24 -94.17 REMARK 500 8 ILE A 8 -63.60 -94.04 REMARK 500 8 ALA A 21 -169.88 -100.19 REMARK 500 9 ILE A 8 -68.88 -105.71 REMARK 500 9 ALA A 21 -169.83 -100.20 REMARK 500 10 ILE A 8 -68.11 -105.24 REMARK 500 10 ALA A 21 -169.73 -100.19 REMARK 500 11 ILE A 8 -62.96 -97.74 REMARK 500 12 CYS A 6 -169.74 -111.53 REMARK 500 12 ILE A 8 -68.84 -102.72 REMARK 500 13 ILE A 8 -64.90 -103.79 REMARK 500 13 CYS A 33 32.28 -92.86 REMARK 500 14 ILE A 8 -68.21 -104.08 REMARK 500 14 ALA A 21 -169.67 -100.13 REMARK 500 15 ILE A 8 -62.64 -106.86 REMARK 500 15 GLU A 34 84.33 56.47 REMARK 500 16 ILE A 8 -66.61 -101.03 REMARK 500 16 CYS A 33 35.98 -94.86 REMARK 500 17 ILE A 8 -60.79 -101.67 REMARK 500 17 CYS A 33 32.74 -94.06 REMARK 500 18 ILE A 8 -65.00 -104.16 REMARK 500 18 CYS A 33 36.71 -94.30 REMARK 500 19 ILE A 8 -66.24 -102.83 REMARK 500 19 ASP A 23 34.67 -95.45 REMARK 500 19 MET A 30 -70.63 -50.56 REMARK 500 20 ILE A 8 -68.98 -108.07 REMARK 500 REMARK 500 REMARK: NULL REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 36804 RELATED DB: BMRB REMARK 900 DEFENSIN-LIKE INHIBITOR OF MAMMALIAN AMYLASES, MAGNIFICAMIDE-2, REMARK 900 FROM THE SEA ANEMONE HETERACTIS MAGNIFICA DBREF 9XE5 A 1 44 UNP C0HK71 IAA1_HETMG 1 44 SEQADV 9XE5 ASN A 4 UNP C0HK71 THR 4 CONFLICT SEQADV 9XE5 GLU A 24 UNP C0HK71 MET 24 CONFLICT SEQRES 1 A 44 SER GLU GLY ASN SER CYS TYR ILE TYR HIS GLY VAL TYR SEQRES 2 A 44 GLY ILE CYS LYS ALA LYS CYS ALA GLU ASP GLU LYS ALA SEQRES 3 A 44 MET ALA GLY MET GLY VAL CYS GLU GLY ASP LEU CYS CYS SEQRES 4 A 44 TYR LYS THR PRO TRP SHEET 1 AA1 4 SER A 5 TYR A 7 0 SHEET 2 AA1 4 TYR A 13 LYS A 17 -1 O GLY A 14 N CYS A 6 SHEET 3 AA1 4 LEU A 37 TYR A 40 -1 O LEU A 37 N LYS A 17 SHEET 4 AA1 4 LYS A 25 MET A 27 -1 N LYS A 25 O TYR A 40 SSBOND 1 CYS A 6 CYS A 38 1555 1555 1.90 SSBOND 2 CYS A 16 CYS A 33 1555 1555 1.98 SSBOND 3 CYS A 20 CYS A 39 1555 1555 1.98 SSBOND 4 CYS A 33 CYS A 38 1555 1555 4.66 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 MODEL 1 ENDMDL MODEL 2 ENDMDL MODEL 3 ENDMDL MODEL 4 ENDMDL MODEL 5 ENDMDL MODEL 6 ENDMDL MODEL 7 ENDMDL MODEL 8 ENDMDL MODEL 9 ENDMDL MODEL 10 ENDMDL MODEL 11 ENDMDL MODEL 12 ENDMDL MODEL 13 ENDMDL MODEL 14 ENDMDL MODEL 15 ENDMDL MODEL 16 ENDMDL MODEL 17 ENDMDL MODEL 18 ENDMDL MODEL 19 ENDMDL MODEL 20 ENDMDL CONECT 64 517 CONECT 222 454 CONECT 286 527 CONECT 454 222 517 CONECT 517 64 454 CONECT 527 286 MASTER 134 0 0 0 4 0 0 6 328 1 6 4 END