185D

SEQUENCE SPECIFICITY OF QUINOXALINE ANTIBIOTICS. 1. SOLUTION STRUCTURE OF A 1:1 COMPLEX BETWEEN TRIOSTIN A AND [D(GACGTC)]2 AND COMPARISON WITH THE SOLUTION STRUCTURE OF THE [N-MECYS3, N-MECYS7]TANDEM-[D(GATATC)]2 COMPLEX

SOLUTION NMR

NMR Refinement
Method	Details	Software
DISTANCE GEOMETRY, MOLECULAR DYNAMICS	NUMBER OF ATOMS PRESENT IN ENTRY. NUMBER OF PROTEIN ATOMS 328 NUMBER OF NUCLEIC ACID ATOMS 48 NUMBER OF SOLVENT ATOMS 240 NUMBER OF HETEROGEN ATOMS 40 AVERAGE PAIRWISE RMSD BOND DISTANCES FOR HEAVY ATOM POSITIONS FOR 5 STRUCTURES: 1.37 ANGSTROMS.	X-PLOR

NMR Ensemble Information
Conformer Selection Criteria
Conformers Calculated Total Number
Conformers Submitted Total Number	5

Additional NMR Experimental Information
Details	TRIOSTIN A CONTAINS TWO PLANAR AROMATIC QUINOXALINE RINGS THAT ARE COVALENTLY ATTACHED TO A CYCLIC OCTADEPSIPEPTIDE RING REPRESENTED BY CHAINS A AND B IN THIS ENTRY. THERE IS A DISULFIDE BRIDGE LINKING CYS A 4 TO CYS B 9. BOTH CYS AND VAL RESIDUES CONTAIN METHYLATED AMIDE NITROGENS; THE TWO D-SER RESIDUES ARE AMIDE BONDED TO THE TWO QUINOXALINE RINGS.

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	refinement	X-PLOR		BRUNGER

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.