4uvm

In meso crystal structure of the POT family transporter PepTSo

spinqualitylabelsall models 4uvm, resolution 3.00Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4uvm is a 1 chain structure with sequence from Sheon. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: 78M, 78N Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed Proton-coupled oligopeptide transporters belong to the major facilitator superfamily (MFS) of membrane transporters. Recent crystal structures suggest the MFS fold facilitates transport through rearrangement of their two six-helix bundles around a central ligand binding site; how this is achieved, however, is poorly understood. Using modeling, molecular dynamics, crystallography, functional assays, and site-directed spin labeling combined with double electron-electron resonance (DEER) spectroscopy, we present a detailed study of the transport dynamics of two bacterial oligopeptide transporters, PepTSo and PepTSt. Our results identify several salt bridges that stabilize outward-facing conformations and we show that, for all the current structures of MFS transporters, the first two helices of each of the four inverted-topology repeat units form half of either the periplasmic or cytoplasmic gate and that these function cooperatively in a scissor-like motion to control access to the peptide binding site during transport. Gating topology of the proton-coupled oligopeptide symporters.,Fowler PW, Orwick-Rydmark M, Radestock S, Solcan N, Dijkman PM, Lyons JA, Kwok J, Caffrey M, Watts A, Forrest LR, Newstead S Structure. 2015 Feb 3;23(2):290-301. doi: 10.1016/j.str.2014.12.012. PMID:25651061 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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