1QFD - Header Asymmetric Unit

HEADER INHIBITOR 08-APR-99 1QFD

TITLE NMR SOLUTION STRUCTURE OF ALPHA-AMYLASE INHIBITOR (AAI)

COMPND MOL_ID: 1; COMPND 2 MOLECULE: PROTEIN (ALPHA-AMYLASE INHIBITOR); COMPND 3 CHAIN: A; COMPND 4 OTHER_DETAILS: SYNTHETIC

SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: AMARANTHUS HYPOCHONDRIACUS; SOURCE 3 ORGANISM_COMMON: GRAIN AMARANTH; SOURCE 4 ORGANISM_TAXID: 28502; SOURCE 5 ORGAN: SEED; SOURCE 6 OTHER_DETAILS: SYNTHETIC SEQUENCE

KEYWDS INHIBITOR

EXPDTA SOLUTION NMR

NUMMDL 10

AUTHOR S.LU,P.DENG,X.LIU,J.LUO,R.HAN,X.GU,S.LIANG,X.WANG,L.FENG, AUTHOR 2 V.LOZANOV,A.PATTHY,S.PONGOR

REVDAT 3 24-FEB-09 1QFD 1 VERSN REVDAT 2 01-APR-03 1QFD 1 JRNL REVDAT 1 16-JUL-99 1QFD 0

JRNL AUTH S.LU,P.DENG,X.LIU,J.LUO,R.HAN,X.GU,S.LIANG,X.WANG, JRNL AUTH 2 F.LI,V.LOZANOV,A.PATTHY,S.PONGOR JRNL TITL SOLUTION STRUCTURE OF THE MAJOR ALPHA-AMYLASE JRNL TITL 2 INHIBITOR OF THE CROP PLANT AMARANTH. JRNL REF J.BIOL.CHEM. V. 274 20473 1999 JRNL REFN ISSN 0021-9258 JRNL PMID 10400675 JRNL DOI 10.1074/JBC.274.29.20473

REMARK 1 REMARK 1 REFERENCE 1 REMARK 1 AUTH V.LOZANOV,C.GUARNACCIA,A.PATTHY,S.FOTI,S.PONGOR REMARK 1 TITL SYNTHESIS AND CYSTINE/CYSTEINE-CATALYZED OXIDATIVE REMARK 1 TITL 2 FOLDING OF THE AMARANTH ALPHA-AMYLASE INHIBITOR REMARK 1 REF J.PEPT.RES. V.50(1 65 1997 REMARK 1 REFN ISSN 1397-002X REMARK 1 REFERENCE 2 REMARK 1 AUTH A.CHAGOLLA-LOPEZ,A.BLANCO-LABRA,A.PATTHY,R.SANCHEZ, REMARK 1 AUTH 2 S.PONGOR REMARK 1 TITL A NOVEL ALPHA-AMYLASE INHIBITOR FROM AMARANTH REMARK 1 TITL 2 (AMARANTHUS HYPOCONDRIACUS)SEEDS REMARK 1 REF J.BIOL.CHEM. V. 269 23675 1994 REMARK 1 REFN ISSN 0021-9258

REMARK 2 REMARK 2 RESOLUTION. NOT APPLICABLE.

REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : X-PLOR 3.851 REMARK 3 AUTHORS : BRUNGER REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: NULL

REMARK 4 REMARK 4 1QFD COMPLIES WITH FORMAT V. 3.15, 01-DEC-08

REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 12-APR-99. REMARK 100 THE RCSB ID CODE IS RCSB000816.

REMARK 210 REMARK 210 EXPERIMENTAL DETAILS REMARK 210 EXPERIMENT TYPE : NMR REMARK 210 TEMPERATURE (KELVIN) : 300 REMARK 210 PH : 6.5 REMARK 210 IONIC STRENGTH : 20 MM REMARK 210 PRESSURE : 1 ATM REMARK 210 SAMPLE CONTENTS : 90% WATER/10% D2O REMARK 210 REMARK 210 NMR EXPERIMENTS CONDUCTED : NOESY, COSY, TOCSY, DQF-COSY REMARK 210 SPECTROMETER FIELD STRENGTH : 500 MHZ REMARK 210 SPECTROMETER MODEL : AMX500 REMARK 210 SPECTROMETER MANUFACTURER : BRUKER REMARK 210 REMARK 210 STRUCTURE DETERMINATION. REMARK 210 SOFTWARE USED : SYBYL, X-PLOR REMARK 210 METHOD USED : SIMULATED ANNEALING REMARK 210 REMARK 210 CONFORMERS, NUMBER CALCULATED : 50 REMARK 210 CONFORMERS, NUMBER SUBMITTED : 10 REMARK 210 CONFORMERS, SELECTION CRITERIA : LEAST RESTRAINT VIOLATION AND REMARK 210 RESULT OF PROCHECK REMARK 210 REMARK 210 BEST REPRESENTATIVE CONFORMER IN THIS ENSEMBLE : NULL 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 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 LYS A 4 153.20 -46.68 REMARK 500 4 CYS A 18 170.44 -59.16 REMARK 500 5 PRO A 20 0.25 -68.51 REMARK 500 6 TYR A 27 -61.39 -106.90 REMARK 500 7 PRO A 20 0.88 -67.74 REMARK 500 8 PRO A 20 0.82 -69.17 REMARK 500 8 SER A 25 -159.87 -119.38 REMARK 500 9 TYR A 27 -60.78 -93.91 REMARK 500 REMARK 500 REMARK: NULL REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: PLANAR GROUPS REMARK 500 REMARK 500 PLANAR GROUPS IN THE FOLLOWING RESIDUES HAVE A TOTAL REMARK 500 RMS DISTANCE OF ALL ATOMS FROM THE BEST-FIT PLANE REMARK 500 BY MORE THAN AN EXPECTED VALUE OF 6*RMSD, WITH AN REMARK 500 RMSD 0.02 ANGSTROMS, OR AT LEAST ONE ATOM HAS REMARK 500 AN RMSD GREATER THAN THIS VALUE REMARK 500 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER; REMARK 500 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE). REMARK 500 REMARK 500 M RES CSSEQI RMS TYPE REMARK 500 1 ARG A 7 0.30 SIDE_CHAIN REMARK 500 2 ARG A 7 0.32 SIDE_CHAIN REMARK 500 3 ARG A 7 0.32 SIDE_CHAIN REMARK 500 4 ARG A 7 0.29 SIDE_CHAIN REMARK 500 5 ARG A 7 0.30 SIDE_CHAIN REMARK 500 6 ARG A 7 0.32 SIDE_CHAIN REMARK 500 7 ARG A 7 0.29 SIDE_CHAIN REMARK 500 8 ARG A 7 0.31 SIDE_CHAIN REMARK 500 9 ARG A 7 0.32 SIDE_CHAIN REMARK 500 10 ARG A 7 0.31 SIDE_CHAIN REMARK 500 REMARK 500 REMARK: NULL

DBREF 1QFD A 1 32 UNP P80403 IAAI_AMAHP 1 32

SEQRES 1 A 32 CYS ILE PRO LYS TRP ASN ARG CYS GLY PRO LYS MET ASP SEQRES 2 A 32 GLY VAL PRO CYS CYS GLU PRO TYR THR CYS THR SER ASP SEQRES 3 A 32 TYR TYR GLY ASN CYS SER

HELIX 1 1 PRO A 10 ASP A 13 1 4

SHEET 1 S1 1 ARG A 7 CYS A 8 0 SHEET 1 S2 1 THR A 22 THR A 24 0 SHEET 1 S3 1 GLY A 29 SER A 32 0

SSBOND 1 CYS A 1 CYS A 18 1555 1555 2.02 SSBOND 2 CYS A 8 CYS A 23 1555 1555 2.02 SSBOND 3 CYS A 17 CYS A 31 1555 1555 2.02

CRYST1 1.000 1.000 1.000 90.00 90.00 90.00 P 1 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