Journal: bioRxiv
Article Title: Discovery and CryoEM Structure of FPM13, a Periplasmic Metalloprotein Unique to Francisella
doi: 10.1101/2025.05.08.652791
Figure Lengend Snippet: (A) FPM13 is biotinylated in the presence of H 2 O 2 and pulled down by streptavidin-agarose APEX2 that is targeted to the periplasm (ssAPEX2), but not by cytosolic APEX2. GroEL and KatG serve as cytosolic and periplasmic control proteins, respectively. (B - C) TX-114 phase extraction shows that FPM13 and KatG are soluble proteins that partition into the aqueous phase, unlike the known lipoprotein, IglE (C, lane 4). FPM13-ALFA is not secreted into the culture filtrate (C, lane5), unlike positive control IglC ( D , lane 6). Stain free UV-image shows equal loading of lanes being compared (E).
Article Snippet: APEX2 sequence was amplified by PCR from Vimentin - APEX2 in pECFP, a gift from Alice Ting (Addgene plasmid #66170).
Techniques: Control, Extraction, Positive Control, Staining