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. 2024 May 22;11:1390745. doi: 10.3389/fmolb.2024.1390745

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Copyright © 2024 Rajapaksha, Yao, Cook, Seibold, Liu, Battaile, Fontenot, Donnarumma, Lovell and Rivera.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Structure of the Mg²⁺ and SO₄ ^2- bound dodecamer Pa DpsL (Pa DpsL-dd-Mg). (A) View of the 12-mer showing bound Mg²⁺ (blue spheres) and SO₄ ^2-(red/yellow) ions. (B) Sulfate site 1 on the N-terminal tail. (C) Magnesium site 1 and sulfate site 2 located near the short helix (α3) on the loop connecting α2 and α4. (D) Sulfate site 3 bound to K65 in a type-A 3-fold pore. (E) Sulfate site 4 in a type-B 3-fold pore, where the sulfate ion is coordinated by the side chains of N146 and R152. (F) Magnesium sites 2 and 3 located approximately 13 Å from one another.