1bdw
From Proteopedia
|
GRAMICIDIN D FROM BACILLUS BREVIS (ACTIVE FORM)
Overview
The linear pentadecapeptide antibiotic, gramicidin D, is a naturally, occurring product of Bacillus brevis known to form ion channels in, synthetic and natural membranes. The x-ray crystal structures of the, right-handed double-stranded double-helical dimers (DSDH) reported here, agree with 15N-NMR and CD data on the functional gramicidin D channel in, lipid bilayers. These structures demonstrate single-file ion transfer, through the channels. The results also indicate that previous crystal, structure reports of a left-handed double-stranded double-helical dimer in, complex with Cs+ and K+ salts may be in error and that our evidence points, to the DSDH as the major conformer responsible for ion transport in, membranes.
About this Structure
1BDW is a Protein complex structure of sequences from Brevibacillus brevis with FOR and ACY as ligands. Full crystallographic information is available from OCA.
Reference
The conducting form of gramicidin A is a right-handed double-stranded double helix., Burkhart BM, Li N, Langs DA, Pangborn WA, Duax WL, Proc Natl Acad Sci U S A. 1998 Oct 27;95(22):12950-5. PMID:9789021
Page seeded by OCA on Sun Nov 25 00:03:55 2007
