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Figure 1
Eight different structure models of the fungal methyl­transferase PsiM, in three different crystal forms (cf. Table 1[link]), each presented as a protein worm, coloured from the N-terminal (blue) to the C-terminal (red). The ball and stick models are the SAH and SFG coenzyme analogues. While we can see that the substrate recognition loop (SRL, top red circles in the top row) is incomplete in the first six models, the O1 form models present this loop as continuous and on par with other model parts, because any dynamic information is missing. From multiple crystal forms we can already infer that the N- and C-termini (lower red circles) can assume packing- and environment-dependent conformations – even a distinct α-helix of the N-terminal expression tag is partly visible in the bottom four models, albeit without any dynamic information.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 58| Part 2| April 2025| Pages 615-621
https://doi.org/10.1107/S160057672500130X
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