6AN3
Crystal structure of H172A-peptidylglycine alpha-hydroxylating monooxygenase (PHM) mutant soaked with peptide (no CuH bound, no peptide bound)
Summary for 6AN3
| Entry DOI | 10.2210/pdb6an3/pdb |
| Descriptor | Peptidyl-glycine alpha-amidating monooxygenase, COPPER (II) ION, DI(HYDROXYETHYL)ETHER, ... (4 entities in total) |
| Functional Keywords | peptidylglycine monooxygenase, peptidylglycine 2-hydroxylase, phm, oxidoreductase |
| Biological source | Rattus norvegicus (Rat) |
| Total number of polymer chains | 1 |
| Total formula weight | 34876.48 |
| Authors | Maheshwari, S.,Rudzka, K.,Gabelli, S.B.,Amzel, L.M. (deposition date: 2017-08-11, release date: 2018-07-18, Last modification date: 2023-10-04) |
| Primary citation | Maheshwari, S.,Shimokawa, C.,Rudzka, K.,Kline, C.D.,Eipper, B.A.,Mains, R.E.,Gabelli, S.B.,Blackburn, N.,Amzel, L.M. Effects of copper occupancy on the conformational landscape of peptidylglycine alpha-hydroxylating monooxygenase. Commun Biol, 1:74-74, 2018 Cited by PubMed Abstract: The structures of metalloproteins that use redox-active metals for catalysis are usually exquisitely folded in a way that they are prearranged to accept their metal cofactors. Peptidylglycine α-hydroxylating monooxygenase (PHM) is a dicopper enzyme that catalyzes hydroxylation of the α-carbon of glycine-extended peptides for the formation of des-glycine amidated peptides. Here, we present the structures of apo-PHM and of mutants of one of the copper sites (H107A, H108A, and H172A) determined in the presence and absence of citrate. Together, these structures show that the absence of one copper changes the conformational landscape of PHM. In one of these structures, a large interdomain rearrangement brings residues from both copper sites to coordinate a single copper (closed conformation) indicating that full copper occupancy is necessary for locking the catalytically competent conformation (open). These data suggest that in addition to their required participation in catalysis, the redox-active metals play an important structural role. PubMed: 30271955DOI: 10.1038/s42003-018-0082-y PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (2.05 Å) |
Structure validation
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