Fig. 3: Glycosylation and metal-binding sites in ArlB1 and ArlB2.
From: An archaellum filament composed of two alternating subunits
a Atomic models of ArlB1 (cyan) and ArlB2 (sand) are shown in ribbon representation with modelled glycan molecules, side chains of metal and glycan binding residues shown as stick models and metal ions highlighted as green spheres. Scale bar in a, 10 Å. b Close-ups of the three glycosylation sites in ArlB1. c Close-ups of the six glycosylation sites in ArlB2. GL glycosylation loop. d Stereo views of ArlB1 and ArlB2 metal-binding sites. The cryoEM map is represented as a blue mesh and contoured at 2.8 σ. Protein chain is shown as a stick model, Ca2+ ion is shown as a cyan sphere with metal-coordinating residues labelled.
