4fct | pdb_00004fct

Crystal structure of the C-terminal domain of ClpB

spinqualitylabelsall models 4fct, resolution 4.00Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4fct is a 1 chain structure with sequence from Thermus thermophilus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Related: 4fcv, 4fcw, 4fd2 Gene: clpB, TTHA1487 (Thermus thermophilus) Resources: FirstGlance, OCA, RCSB, PDBsum Publication Abstract from PubMed ClpB is a ring-forming, ATP-dependent protein disaggregase that cooperates with the cognate Hsp70 system to recover functional protein from aggregates. How ClpB harnesses the energy of ATP binding and hydrolysis to facilitate the mechanical unfolding of previously aggregated, stress-damaged proteins remains unclear. Here, we present crystal structures of the ClpB D2 domain in the nucleotide-bound and -free states, and the fitted cryoEM structure of the D2 hexamer ring, which provide a structural understanding of the ATP power stroke that drives protein translocation through the ClpB hexamer. We demonstrate that the conformation of the substrate-translocating pore loop is coupled to the nucleotide state of the cis subunit, which is transmitted to the neighboring subunit via a conserved but structurally distinct intersubunit-signaling pathway common to diverse AAA+ machines. Furthermore, we found that an engineered, disulfide cross-linked ClpB hexamer is fully functional biochemically, suggesting that ClpB deoligomerization is not required for protein disaggregation. Structural basis for intersubunit signaling in a protein disaggregating machine.,Biter AB, Lee S, Sung N, Tsai FT Proc Natl Acad Sci U S A. 2012 Jul 31;109(31):12515-20. Epub 2012 Jul 16. PMID:22802670 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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