6sv3

Structure of coproheme-LmCpfC

spinqualitylabelsall models 6sv3, resolution 1.64Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6sv3 is a 1 chain structure with sequence from Listeria monocytogenes. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.6400087Å Ligands: FEC, GOL Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function CPFC_LISMO Involved in coproporphyrin-dependent heme b biosynthesis (PubMed:31794133). Catalyzes the insertion of ferrous iron into coproporphyrin III to form Fe-coproporphyrin III (PubMed:31794133). Publication Abstract from PubMed Coproporphyrin ferrochelatases (CpfCs, EC 4.99.1.9) insert ferrous iron into coproporphyrin III yielding coproheme. CpfCs are utilized by prokaryotic, mainly monoderm (Gram-positive) bacteria within the recently detected coproporphyrin-dependent heme biosynthesis pathway. Here we present a comprehensive study on CpfC from Listeria monocytogenes (LmCpfC) including the first crystal structure of a coproheme-bound CpfC. Comparison of crystal structures of apo-LmCpfC and coproheme-LmCpfC allowed identification of structural rearrangements and of amino acids involved in tetrapyrrole macrocycle and Fe(2+) binding. Differential scanning calorimetry of apo-, coproporphyrin III- and coproheme-LmCpfC underline the pronounced non-covalent interaction of both coproporphyrin and coproheme with the protein (DeltaTm = 11 degrees C compared to apo-LmCpfC) which includes the propionates (p2, p4, p6, p7) and the amino acids Arg29, Arg45, Tyr46, Ser53 and Tyr124. Furthermore, the thermodynamics and kinetics of coproporphyrin III and coproheme binding to apo-LmCpfC is presented as well as the kinetics of insertion of ferrous iron into coproporphyrin III-LmCpfC that immediately leads to formation of ferric coproheme-LmCpfC (kcat /KM = 4.7 x 10(5) M(-1) s(-1) ). We compare the crystal structure of coproheme-LmCpfC with available structures of CpfCs with artificial tetrapyrrole macrocycles and discuss our data on substrate binding, iron insertion and substrate release in the context of the coproporphyrin-dependent heme biosynthesis pathway. Crystal structures and calorimetry reveal catalytically relevant binding mode of coproporphyrin and coproheme in coproporphyrin ferrochelatase.,Hofbauer S, Helm J, Obinger C, Djinovic-Carugo K, Furtmuller PG FEBS J. 2019 Dec 3. doi: 10.1111/febs.15164. PMID:31794133 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Ferrochelatase 3D structures

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