4a39

Metallo-carboxypeptidase from Pseudomonas Aeruginosa in complex with (2-guanidinoethylmercapto)succinic acid

spinqualitylabelsall models 4a39, resolution 1.60Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4a39 is a 2 chain structure with sequence from Pseudomonas aeruginosa. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.6Å Ligands: GEM, ZN Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q9I012_PSEAE Publication Abstract from PubMed PaCCP is a metallocarboxypeptidase (MCP) of the M14 family from Pseudomonas aeruginosa, which belongs to a bacterial clade of carboxypeptidases that are homologous to the recently discovered M14D subfamily of human nonsecretory cytosolic carboxypeptidases (CCPs). CCPs are intracellular peptidases involved, among other roles, in the post-translational modifications of tubulin. Here we report the crystal structure of PaCCP at high resolution (1.6 A). Its 375 residues are folded in a novel beta-sandwich N-terminal domain followed by the classical carboxypeptidase alpha/beta-hydrolase domain, this one in a shorter and more compact form. The former is unique in the whole family and does not have sequential or structural homology with other domains that are usually flanking the latter, like the prodomain of the M14A subfamily or the C-terminal transthyretin/prealbumin-like domains of the M14B subfamily. PaCCP does not display activity against small carboxypeptidase substrates, so in this form it might constitute an inactive precursor of the protease. Structural results derived from cocrystallization with well-known inhibitors of MCPs indicate that the enzyme might only possess C-terminal hydrolase activity against cellular substrates of particular specificity and/or when undergoes structural rearrangements. The derived PaCCP structure allows a first structural insight into the more complex and largely unknown mammalian CCP subfamily.-Otero, A., Rodriguez de la Vega, M., Tanco, S., Lorenzo, J., Aviles, F. X., Reverter, D. The novel structure of a cytosolic M14 metallocarboxypeptidase (CCP) from Pseudomonas aeruginosa: a model for mammalian CCPs. The novel structure of a cytosolic M14 metallocarboxypeptidase (CCP) from Pseudomonas aeruginosa: a model for mammalian CCPs.,Otero A, Rodriguez de la Vega M, Tanco S, Lorenzo J, Aviles FX, Reverter D FASEB J. 2012 May 29. PMID:22645247 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Carboxypeptidase 3D structures

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