2l16

Solution structure of Bacillus subtilits TatAd protein in DPC micelles

spinqualitylabelsall models 2l16, 40 NMR models Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2l16 is a 1 chain structure with sequence from "vibrio_subtilis"_ehrenberg_1835 "vibrio subtilis" ehrenberg 1835. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance. Gene: tatAd, yczB, BSU02630 ("Vibrio subtilis" Ehrenberg 1835) Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [TATAD_BACSU] Part of the twin-arginine translocation (Tat) system that transports large folded proteins containing a characteristic twin-arginine motif in their signal peptide across membranes. TatA could form the protein-conducting channel of the Tat system. Required for PhoD secretion. The cytosolic fraction of TatAd binds the precursor of PhoD.[HAMAP-Rule:MF_00236] Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed The twin-arginine transport (Tat) system translocates folded proteins across the bacterial cytoplasmic or chloroplast thylakoid membrane of plants. The Tat system in most Gram-positive bacteria consists of two essential components, the TatA and TatC proteins. TatA is considered to be a bifunctional subunit, which can form a protein-conducting channel by self-oligomerization and can also participate in substrate recognition. However, the molecular mechanism underlying protein translocation remains elusive. Herein, we report the solution structure of the TatA(d) protein from Bacillus subtilis by NMR spectroscopy, the first structure of the Tat system at atomic resolution. TatA(d) shows an L-shaped structure formed by a transmembrane helix and an amphipathic helix, while the C-terminal tail is largely unstructured. Our results strongly support the postulated topology of TatA(d) in which the transmembrane helix is inserted into the lipid bilayer while the amphipathic helix lies at the membrane-water interface. Moreover, the structure of TatA(d) revealed the structural importance of several conserved residues at the hinge region, thus shedding new light on further elucidation of the protein transport mechanism of the Tat system. Solution NMR Structure of the TatA Component of the Twin-Arginine Protein Transport System from Gram-Positive Bacterium Bacillus subtilis.,Hu Y, Zhao E, Li H, Xia B, Jin C J Am Chem Soc. 2010 Aug 20. PMID:20726548 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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