1MXN - Header Asymmetric Unit

HEADER TOXIN 02-OCT-02 1MXN

TITLE SOLUTION STRUCTURE OF ALPHA-CONOTOXIN AUIB

COMPND MOL_ID: 1; COMPND 2 MOLECULE: ALPHA-CONOTOXIN AUIB; COMPND 3 CHAIN: A; COMPND 4 ENGINEERED: YES

SOURCE MOL_ID: 1; SOURCE 2 SYNTHETIC: YES; SOURCE 3 OTHER_DETAILS: THIS PEPTIDE WAS SYNTHESISED BY BOC SOURCE 4 CHEMISTRY BUT OCCURS NATURALLY IN CONUS AULICUS.

KEYWDS ALPHA HELIX, TOXIN

EXPDTA SOLUTION NMR

NUMMDL 20

AUTHOR J.L.DUTTON,P.S.BANSAL,R.C.HOGG,D.J.ADAMS,P.F.ALEWOOD, AUTHOR 2 D.J.CRAIK

REVDAT 2 24-FEB-09 1MXN 1 VERSN REVDAT 1 30-DEC-02 1MXN 0

JRNL AUTH J.L.DUTTON,P.S.BANSAL,R.C.HOGG,D.J.ADAMS, JRNL AUTH 2 P.F.ALEWOOD,D.J.CRAIK JRNL TITL A NEW LEVEL OF CONOTOXIN DIVERSITY, A NON-NATIVE JRNL TITL 2 DISULFIDE BOND CONNECTIVITY IN ALPHA -CONOTOXIN JRNL TITL 3 AUIB REDUCES STRUCTURAL DEFINITION BUT INCREASES JRNL TITL 4 BIOLOGICAL ACTIVITY. JRNL REF J.BIOL.CHEM. V. 277 48849 2002 JRNL REFN ISSN 0021-9258 JRNL PMID 12376538 JRNL DOI 10.1074/JBC.M208842200

REMARK 1

REMARK 2 REMARK 2 RESOLUTION. NOT APPLICABLE.

REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : X-PLOR 3.851 THEN 3.1F REMARK 3 AUTHORS : BRUNGER REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: 32 MEDIUM AND 18 LONG RANGE NOES REMARK 3 WERE INCLUDED, 7 DIHEDRAL ANGLE RESTRAINTS WERE INCLUDED, 5 H- REMARK 3 BOND RESTRAINTS WERE INCLUDED

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

REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY PDBJ ON 04-OCT-02. REMARK 100 THE RCSB ID CODE IS RCSB017284.

REMARK 210 REMARK 210 EXPERIMENTAL DETAILS REMARK 210 EXPERIMENT TYPE : NMR REMARK 210 TEMPERATURE (KELVIN) : 290 REMARK 210 PH : 3.5 REMARK 210 IONIC STRENGTH : 0 REMARK 210 PRESSURE : ATMOSPHERIC ATM REMARK 210 SAMPLE CONTENTS : 2MM PEPTIDE REMARK 210 REMARK 210 NMR EXPERIMENTS CONDUCTED : 2D NOESY, 2D TOCSY, E-COSY, REMARK 210 DQF-COSY REMARK 210 SPECTROMETER FIELD STRENGTH : 750 MHZ, 500 MHZ REMARK 210 SPECTROMETER MODEL : DMX, ARX REMARK 210 SPECTROMETER MANUFACTURER : BRUKER REMARK 210 REMARK 210 STRUCTURE DETERMINATION. REMARK 210 SOFTWARE USED : XWINNMR 2.6, X-PLOR 3.851 REMARK 210 THEN 3.1F REMARK 210 METHOD USED : SIMULATED ANNEALING, REMARK 210 MOLECULAR DYNAMICS, ENERGY REMARK 210 MINIMISATION IN A CHARM REMARK 210 FORCEFIELD REMARK 210 REMARK 210 CONFORMERS, NUMBER CALCULATED : 50 REMARK 210 CONFORMERS, NUMBER SUBMITTED : 20 REMARK 210 CONFORMERS, SELECTION CRITERIA : STRUCTURES WITH THE LEAST REMARK 210 RESTRAINT VIOLATIONS, REMARK 210 STRUCTURES WITH THE LOWEST REMARK 210 ENERGY REMARK 210 REMARK 210 BEST REPRESENTATIVE CONFORMER IN THIS ENSEMBLE : 8 REMARK 210 REMARK 210 REMARK: THIS STRUCTURE WAS DETERMINED USING STANDARD 2D REMARK 210 HOMONUCLEAR TECHNIQUES.

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: 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 2 CYS A 3 CA - CB - SG ANGL. DEV. = 7.2 DEGREES REMARK 500 4 CYS A 2 CA - CB - SG ANGL. DEV. = 6.8 DEGREES REMARK 500 4 CYS A 3 CA - CB - SG ANGL. DEV. = 7.5 DEGREES REMARK 500 6 CYS A 2 CA - CB - SG ANGL. DEV. = 8.5 DEGREES REMARK 500 7 CYS A 2 CA - CB - SG ANGL. DEV. = 6.8 DEGREES REMARK 500 8 CYS A 2 CA - CB - SG ANGL. DEV. = 6.6 DEGREES REMARK 500 10 CYS A 2 CA - CB - SG ANGL. DEV. = 7.3 DEGREES REMARK 500 11 CYS A 2 CA - CB - SG ANGL. DEV. = 7.3 DEGREES REMARK 500 12 CYS A 2 CA - CB - SG ANGL. DEV. = 7.1 DEGREES REMARK 500 12 CYS A 3 CA - CB - SG ANGL. DEV. = 7.3 DEGREES REMARK 500 14 CYS A 3 CA - CB - SG ANGL. DEV. = 6.9 DEGREES REMARK 500 18 CYS A 3 CA - CB - SG ANGL. DEV. = 7.6 DEGREES REMARK 500 19 CYS A 2 CA - CB - SG ANGL. DEV. = 6.7 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 20 PRO A 13 -9.22 -59.31 REMARK 500 REMARK 500 REMARK: NULL

REMARK 800 REMARK 800 SITE REMARK 800 SITE_IDENTIFIER: AC1 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE NH2 A 16

REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 1MXP RELATED DB: PDB REMARK 900 1MXP CONTAINS SOLUTION STRUCTURE OF THE RIBBON DISULFIDE REMARK 900 BOND ISOMER OF THE SAME PROTEIN

DBREF 1MXN A 1 15 UNP P56640 CXA2_CONAL 1 15

SEQRES 1 A 16 GLY CYS CYS SER TYR PRO PRO CYS PHE ALA THR ASN PRO SEQRES 2 A 16 ASP CYS NH2

HET NH2 A 16 3

HETNAM NH2 AMINO GROUP

FORMUL 1 NH2 H2 N

HELIX 1 1 GLY A 1 SER A 4 5 4 HELIX 2 2 TYR A 5 ASN A 12 1 8

SSBOND 1 CYS A 2 CYS A 8 1555 1555 2.02 SSBOND 2 CYS A 3 CYS A 15 1555 1555 2.02

LINK C CYS A 15 N NH2 A 16 1555 1555 1.31

SITE 1 AC1 3 PHE A 9 ASP A 14 CYS A 15

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