1QOW image
Entry Detail
PDB ID:
1QOW
Keywords:
Title:
Mersacidin from Bacillus
Biological Source:
Source Organism:
PDB Version:
Deposition Date:
1999-11-19
Release Date:
2000-05-26
Method Details:
Experimental Method:
Resolution:
1.06 Å
R-Value Observed:
0.14
Space Group:
P 32
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:MERSACIDIN
Chain IDs:A, B, C, D, E, F
Chain Length:20
Number of Molecules:6
Biological Source:BACILLUS SP.
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
DHA A SER 2-AMINO-ACRYLIC ACID
Ligand Molecules
Peptide-like Molecules
PRD_000199
Primary Citation
Ab initio structure determination of the lantibiotic mersacidin.
Acta Crystallogr.,Sect.D 56 705 713 (2000)
PMID: 10818347 DOI: 10.1107/s0907444900003711

Abstact

The crystal structure of mersacidin, a potential novel antibiotic against methicillin- and vancomycin-resistant Staphylococcus aureus strains, has been determined by ab initio methods. Despite all crystals being merohedrally twinned, an accurate structural model with an R value of 13.4% has been obtained at atomic resolution. With six molecules in the asymmetric unit and no atom heavier than sulfur, the structure corresponds to a protein of 120 amino acids and is the largest approximately equal-atom unknown structure solved by direct methods. In the crystal, the molecule assumes a compact fold different from that found by NMR in solution. Comparison of the NCS-related molecules reveals regions of variable flexibility. The region highly homologous to the related antibiotic actagardine is very rigid and possibly defines an essential building block of this class of new antibacterial substances.

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Primary Citation of related structures