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. 2021 Apr 14;9(4):837. doi: 10.3390/microorganisms9040837

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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MsMCR structure and its post-translational modifications. (A) MsMCR (αβγ)₂ organization with each chain colored differently. F₄₃₀, HS-CoM and CoB-SH are in balls and sticks and colored in yellow, pink, and light blue, respectively. (B) Close up of the active site. 2F_o-F_c electron density map for the F₄₃₀ and coenzymes is contoured at 2-σ. (C) Superposition of MsMCR (same color code as panel A) on MbMCR (α, β, γ in blue, dark green and red respectively). The ligands and modified residues are in balls and sticks with the modifications as spheres. Each panel presents the 2F_o-F_c map contoured at 2-σ (black mesh) and the F_o-F_c map contoured at 4-σ (green, positive, and red, negative) after refinement for a classic (left) or modified (right) residue. Final modelled residue is highlighted in bold.