HEADER TOXIN 18-JAN-98 1XGA TITLE ALPHA CONOTOXIN GI: 2-7;3-13 (NATIVE) DISULFIDE BOND ISOMER, NMR, 35 TITLE 2 STRUCTURES COMPND MOL_ID: 1; COMPND 2 MOLECULE: ALPHA-CONOTOXIN GI; COMPND 3 CHAIN: A; COMPND 4 SYNONYM: GI(2-7,3-13); COMPND 5 ENGINEERED: YES; COMPND 6 OTHER_DETAILS: AMIDATED C-TERMINUS SOURCE MOL_ID: 1; SOURCE 2 SYNTHETIC: YES; SOURCE 3 ORGANISM_SCIENTIFIC: CONUS GEOGRAPHUS; SOURCE 4 ORGANISM_COMMON: GEOGRAPHY CONE; SOURCE 5 ORGANISM_TAXID: 6491; SOURCE 6 OTHER_DETAILS: SYNTHESISED BY SOLID PHASE PEPTIDE CHEMISTRY, USING SOURCE 7 SELECTIVE DISULFIDE BOND FORMATION KEYWDS ALPHA-CONOTOXIN, NICOTINIC ACETYLCHOLINE RECEPTOR, DISULFIDE BOND KEYWDS 2 ISOMERS, TOXIN EXPDTA SOLUTION NMR NUMMDL 35 AUTHOR J.GEHRMANN,P.F.ALEWOOD,D.J.CRAIK REVDAT 3 25-MAY-16 1XGA 1 SOURCE VERSN REVDAT 2 24-FEB-09 1XGA 1 VERSN REVDAT 1 16-FEB-99 1XGA 0 JRNL AUTH J.GEHRMANN,P.F.ALEWOOD,D.J.CRAIK JRNL TITL STRUCTURE DETERMINATION OF THE THREE DISULFIDE BOND ISOMERS JRNL TITL 2 OF ALPHA-CONOTOXIN GI: A MODEL FOR THE ROLE OF DISULFIDE JRNL TITL 3 BONDS IN STRUCTURAL STABILITY. JRNL REF J.MOL.BIOL. V. 278 401 1998 JRNL REFN ISSN 0022-2836 JRNL PMID 9571060 JRNL DOI 10.1006/JMBI.1998.1701 REMARK 2 REMARK 2 RESOLUTION. NOT APPLICABLE. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : X-PLOR 3.1 REMARK 3 AUTHORS : BRUNGER REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: NULL REMARK 4 REMARK 4 1XGA COMPLIES WITH FORMAT V. 3.15, 01-DEC-08 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY BNL. REMARK 210 REMARK 210 EXPERIMENTAL DETAILS REMARK 210 EXPERIMENT TYPE : NMR REMARK 210 TEMPERATURE (KELVIN) : 278 REMARK 210 PH : 3.5 REMARK 210 IONIC STRENGTH : 0 REMARK 210 PRESSURE : 1 ATM REMARK 210 SAMPLE CONTENTS : H2O/D2O REMARK 210 REMARK 210 NMR EXPERIMENTS CONDUCTED : TOCSY; NOESY; DQF-COSY; HMQC REMARK 210 SPECTROMETER FIELD STRENGTH : 500 MHZ REMARK 210 SPECTROMETER MODEL : ARX500 REMARK 210 SPECTROMETER MANUFACTURER : BRUKER REMARK 210 REMARK 210 STRUCTURE DETERMINATION. REMARK 210 SOFTWARE USED : FELIX & X-PLOR X-PLOR REMARK 210 METHOD USED : SIMULATED ANNEALING REMARK 210 REMARK 210 CONFORMERS, NUMBER CALCULATED : 50 REMARK 210 CONFORMERS, NUMBER SUBMITTED : 35 REMARK 210 CONFORMERS, SELECTION CRITERIA : LOWEST ENERGY STRUCTURES REMARK 210 REMARK 210 BEST REPRESENTATIVE CONFORMER IN THIS ENSEMBLE : NULL REMARK 210 REMARK 210 REMARK: THE STRUCTURE WAS DETERMINED USING 300MS NOESY EXPERIMENTS REMARK 210 ON A 5MM SAMPLE OF GI(2-7;3-13). 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 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 CYS A 3 60.47 -160.42 REMARK 500 1 SER A 12 71.38 -175.19 REMARK 500 2 CYS A 3 61.32 -160.70 REMARK 500 2 SER A 12 68.17 -174.22 REMARK 500 3 CYS A 3 61.44 -160.87 REMARK 500 3 SER A 12 70.01 -174.74 REMARK 500 4 CYS A 3 61.59 -160.55 REMARK 500 4 SER A 12 68.77 -174.63 REMARK 500 5 CYS A 3 60.83 -160.57 REMARK 500 5 SER A 12 70.28 -173.99 REMARK 500 6 CYS A 3 61.19 -160.47 REMARK 500 6 SER A 12 70.72 -172.67 REMARK 500 7 CYS A 3 60.62 -160.63 REMARK 500 7 SER A 12 47.81 -172.74 REMARK 500 8 CYS A 3 60.89 -160.50 REMARK 500 8 SER A 12 70.73 -175.14 REMARK 500 9 CYS A 3 60.91 -160.41 REMARK 500 9 SER A 12 70.62 -174.90 REMARK 500 10 CYS A 3 60.96 -160.51 REMARK 500 10 SER A 12 71.01 -174.97 REMARK 500 11 CYS A 3 60.78 -160.48 REMARK 500 11 SER A 12 70.62 -175.06 REMARK 500 12 CYS A 3 61.43 -160.53 REMARK 500 12 SER A 12 70.05 -174.77 REMARK 500 13 CYS A 3 60.80 -160.42 REMARK 500 13 SER A 12 70.50 -174.89 REMARK 500 14 CYS A 3 60.53 -160.66 REMARK 500 14 SER A 12 67.79 -174.14 REMARK 500 15 CYS A 3 60.53 -160.74 REMARK 500 15 SER A 12 64.71 -173.21 REMARK 500 16 CYS A 3 59.81 -160.62 REMARK 500 16 SER A 12 69.80 -174.69 REMARK 500 17 CYS A 3 60.65 -160.55 REMARK 500 17 SER A 12 70.13 -175.54 REMARK 500 18 CYS A 3 60.41 -160.54 REMARK 500 18 SER A 12 70.08 -175.54 REMARK 500 19 CYS A 3 60.53 -160.67 REMARK 500 19 SER A 12 67.87 -174.14 REMARK 500 20 CYS A 3 60.56 -160.62 REMARK 500 20 SER A 12 47.51 -172.70 REMARK 500 21 CYS A 3 60.12 -160.78 REMARK 500 21 SER A 12 68.43 -172.72 REMARK 500 22 CYS A 3 59.99 -160.72 REMARK 500 22 SER A 12 70.30 -173.89 REMARK 500 23 CYS A 3 61.20 -160.47 REMARK 500 23 SER A 12 70.00 -174.70 REMARK 500 24 CYS A 3 59.63 -160.82 REMARK 500 24 SER A 12 68.74 -173.09 REMARK 500 25 CYS A 3 60.56 -160.65 REMARK 500 25 SER A 12 67.82 -174.09 REMARK 500 REMARK 500 THIS ENTRY HAS 71 RAMACHANDRAN OUTLIERS. REMARK 500 REMARK 500 REMARK: NULL REMARK 800 REMARK 800 SITE REMARK 800 SITE_IDENTIFIER: BNG REMARK 800 EVIDENCE_CODE: UNKNOWN REMARK 800 SITE_DESCRIPTION: MURINE NACHR ALPHA-SUBUNIT BINDING FACE. REMARK 800 REMARK 800 SITE_IDENTIFIER: STY REMARK 800 EVIDENCE_CODE: UNKNOWN REMARK 800 SITE_DESCRIPTION: MURINE NACHR DELTA-SUBUNIT SELECTIVITY FACE. REMARK 800 REMARK 800 SITE_IDENTIFIER: AC1 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE NH2 A 14 DBREF 1XGA A 1 13 UNP P01519 CXAA_CONGE 1 13 SEQRES 1 A 14 GLU CYS CYS ASN PRO ALA CYS GLY ARG HIS TYR SER CYS SEQRES 2 A 14 NH2 HET NH2 A 14 3 HETNAM NH2 AMINO GROUP FORMUL 1 NH2 H2 N HELIX 1 1 ALA A 6 ARG A 9 5 4 SSBOND 1 CYS A 2 CYS A 7 1555 1555 2.01 SSBOND 2 CYS A 3 CYS A 13 1555 1555 2.02 LINK N NH2 A 14 C CYS A 13 1555 1555 1.31 SITE 1 BNG 5 CYS A 2 ASN A 4 PRO A 5 ALA A 6 SITE 2 BNG 5 CYS A 7 SITE 1 STY 2 ARG A 9 HIS A 10 SITE 1 AC1 2 TYR A 11 CYS A 13 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 MODEL 1