7z15
From Proteopedia
E. coli C-P lyase bound to a PhnK/PhnL dual ABC dimer and ADP + Pi
Structural highlights
FunctionPHNH_ECOLI Together with PhnG, PhnI and PhnL is required for the transfer of the ribose triphosphate moiety from ATP to methyl phosphonate.[1] Publication Abstract from PubMedIn Escherichia coli, the 14-cistron phn operon encoding carbon-phosphorus lyase allows for utilisation of phosphorus from a wide range of stable phosphonate compounds containing a C-P bond. As part of a complex, multi-step pathway, the PhnJ subunit was shown to cleave the C-P bond via a radical mechanism, however, the details of the reaction could not immediately be reconciled with the crystal structure of a 220 kDa PhnGHIJ C-P lyase core complex, leaving a significant gap in our understanding of phosphonate breakdown in bacteria. Here, we show using single-particle cryogenic electron microscopy that PhnJ mediates binding of a double dimer of the ATP-binding cassette proteins, PhnK and PhnL, to the core complex. ATP hydrolysis induces drastic structural remodelling leading to opening of the core complex and reconfiguration of a metal-binding and putative active site located at the interface between the PhnI and PhnJ subunits. Structural remodelling of the carbon-phosphorus lyase machinery by a dual ABC ATPase.,Amstrup SK, Ong SC, Sofos N, Karlsen JL, Skjerning RB, Boesen T, Enghild JJ, Hove-Jensen B, Brodersen DE Nat Commun. 2023 Feb 22;14(1):1001. doi: 10.1038/s41467-023-36604-y. PMID:36813778[2] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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