9bj0

Crystal structure of the periplasmic domain of IgaA from Escherichia coli

spinqualitylabelsall models 9bj0, resolution 2.64Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 9bj0 is a 2 chain structure with sequence from Escherichia coli. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.64Å Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function A0A8T5ZEU4_ECOLX Publication Abstract from PubMed The Rcs pathway is repressed by the inner membrane protein IgaA under non-stressed conditions. This repression is hypothesized to be relieved by the binding of the outer membrane-anchored RcsF to IgaA. However, the precise mechanism by which RcsF binding triggers the signaling remains unclear. Here, we present the 1.8 A resolution crystal structure capturing the interaction between IgaA and RcsF. Our comparative structural analysis, examining both the bound and unbound states of the periplasmic domain of IgaA (IgaAp), highlights rotational flexibility within IgaAp. Conversely, the conformation of RcsF remains unchanged upon binding. Our in vivo and in vitro studies do not support the model of a stable complex involving RcsF, IgaAp, and RcsDp. Instead, we demonstrate that the elements beyond IgaAp play a role in the interaction between IgaA and RcsD. These findings collectively allow us to propose a potential mechanism for the signaling across the inner membrane through IgaA. Molecular insights into the initiation step of the Rcs signaling pathway.,Watanabe N, Savchenko A Structure. 2024 Jun 25:S0969-2126(24)00221-1. doi: 10.1016/j.str.2024.06.003. PMID:38964336 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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