1. Surface proteins of the gliding bacterium Cytophaga sp. strain U67 and its mutants defective in adhesion and motility
- Author
-
R A Bloodgood and Robert P. Burchard
- Subjects
animal structures ,biology ,Strain (chemistry) ,Movement ,Mutant ,Wild type ,Biotin ,Motility ,Adhesion ,Cytophaga ,biology.organism_classification ,Microbiology ,Bacterial Adhesion ,Iodine Radioisotopes ,Molecular Weight ,Bacterial Proteins ,Biochemistry ,Biotinylation ,Mutation ,Rosaniline Dyes ,Molecular Biology ,Bacteria ,Research Article - Abstract
Surface proteins of the gliding bacterium Cytophaga sp. strain U67 that make contact with glass substrata were radioiodinated, using a substratum-immobilized catalyst (Iodo-Gen). At least 15 polypeptides were iodinated, fewer than the number labeled by surface biotinylation of whole cells; these polypeptides define the set of possible candidates for the surface protein(s) that mediates gliding-associated substratum adhesion. The labeling of three adhesion-defective mutants exhibited two characteristic patterns of surface iodination which involved addition, loss, or alteration of several polypeptides of high molecular weight. An adhesion-competent revertant of mutant Adh3 and one of Adh2 exhibited the wild-type labeling pattern. Two other Adh2 revertants resembled their adhesion-defective parent. The labeling pattern of surface polypeptides of a nongliding but adhesive cell strain was similar to that of the wild type.
- Published
- 1990