4ww0

Truncated FtsH from A. aeolicus

spinqualitylabelsall models 4ww0, resolution 2.96Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4ww0 is a 3 chain structure with sequence from Aquifex aeolicus VF5. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.96Å Ligands: ADP, ZN Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function FTSH_AQUAE Acts as a processive, ATP-dependent zinc metallopeptidase for both cytoplasmic and membrane proteins. Plays a role in the quality control of integral membrane proteins (By similarity).[HAMAP-Rule:MF_01458] Publication Abstract from PubMed The crystal structure of a truncated, soluble quadruple mutant of FtsH from Aquifex aeolicus comprising the AAA and protease domains has been determined at 2.96 A resolution in space group I222. The protein crystallizes as a hexamer, with the protease domain forming layers in the ab plane. Contacts between these layers are mediated by the AAA domains. These are highly disordered in one crystal form, but are clearly visible in a related form with a shorter c axis. Here, adenosine diphosphate (ADP) is bound to each subunit and the AAA ring exhibits twofold symmetry. The arrangement is different from the ADP-bound state of an analogously truncated, soluble FtsH construct from Thermotoga maritima. The pore is completely closed and the phenylalanine residues in the pore line a contiguous path. The protease hexamer is very similar to those described for other FtsH structures. To resolve certain open issues regarding a conserved glycine in the linker between the AAA and protease domains, as well as the active-site switch beta-strand, mutations have been introduced in the full-length membrane-bound protein. Activity analysis of these point mutants reveals the crucial importance of these residues for proteolytic activity and is in accord with previous interpretation of the active-site switch and the importance of the linker glycine residue. The structure of Aquifex aeolicus FtsH in the ADP-bound state reveals a C2-symmetric hexamer.,Vostrukhina M, Popov A, Brunstein E, Lanz MA, Baumgartner R, Bieniossek C, Schacherl M, Baumann U Acta Crystallogr D Biol Crystallogr. 2015 Jun;71(Pt 6):1307-18. doi:, 10.1107/S1399004715005945. Epub 2015 May 14. PMID:26057670 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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