1BNB

SOLUTION STRUCTURE OF BOVINE NEUTROPHIL BETA-DEFENSIN 12: THE PEPTIDE FOLD OF THE BETA-DEFENSINS IS IDENTICAL TO THAT OF THE CLASSICAL DEFENSINS

Summary for 1BNB

• Entry DOI: 10.2210/pdb1bnb/pdb
• Descriptor: BOVINE NEUTROPHIL BETA-DEFENSIN 12 (1 entity in total)
• Functional Keywords: beta-defensin 12
• Biological source: Bos taurus (cattle)
• Total number of polymer chains: 1
• Total formula weight: 4126.02

Authors

Zimmermann, G.R.,Legault, P.,Selsted, M.E.,Pardi, A. (deposition date: 1995-03-08, release date: 1995-10-15, Last modification date: 2024-10-23)

Primary citation

Zimmermann, G.R.,Legault, P.,Selsted, M.E.,Pardi, A.
Solution structure of bovine neutrophil beta-defensin-12: the peptide fold of the beta-defensins is identical to that of the classical defensins.
Biochemistry, 34:13663-13671, 1995

PubMed Abstract: The solution structure is reported for bovine neutrophil beta-defensin-12 (BNBD-12), a member of the beta-defensin family of antimicrobial peptides. Structural constraints in the form of proton-proton distances, dihedral angles, and hydrogen bond constraints were derived from two-dimensional, homonuclear magnetic resonance spectroscopy experiments. The three-dimensional structure of BNBD-12 was calculated using distance geometry and restrained molecular dynamics. An ensemble of structures with low NOE constraint violation energies revealed a precisely defined triple-stranded, antiparallel beta-sheet as the structural core of the peptide. The N-terminal beta-strand and three locally well-defined tight turns form a hydrophobic face. Conserved isoleucine and glycine residues form a beta-bulge structure which initiates a beta-hairpin secondary structure motif composed of the second and C-terminal beta-strands. The beta-hairpin contains numerous charged residues and forms the cationic face of BNBD-12. The N-terminal residues were found to be disordered, due to an absence of tertiary NOEs. The triple-stranded beta-sheet, the beta-bulge preceding the hairpin, and the cationic/hydrophobic amphiphilic character are definitive features of all defensin structures determined to date. Further, we predict that the tracheal antimicrobial peptide (TAP) and the recently described gallinacins will have tertiary structures similar to that of BNBD-12.

PubMed: 7577957
DOI: 10.1021/bi00041a048

Experimental method

SOLUTION NMR