Transmission electron micrograph of a cell of strain TB107T. Bar, 0.5 micron. - Source:3Aerobic heterotroph
Proteiniphilum are facultatively anaerobic 1, fermenters 3. They are proteolytic bacteria that utilise proteins, yeast extract, pyruvate 3 and carbohydrates 1 as substrates for anaerobic growth in pure culture. Alcohols and most fatty acids are not utilised 3. Acetic acid is produced from the fermentation of yeast extract, peptone 3 1, pyruvate, glycine, and L-arginine 3. Cells of Proteiniphilum are rods, which occcur singly or in pairs. Occassionally, P. saccharofermentans forms filamentous cells in pure culture 1.
 Hahnke, Langer, Koeck, Klocke (2016): Erratum to Description of Proteiniphilum saccharofermentans sp. nov., Petrimonas mucosa sp. nov. and Fermentimonas caenicola gen. nov., sp. nov., isolated from mesophilic laboratory-scale biogas reactors, and emended description of the genus Proteiniphilum. Int. J. Syst. Evol. Microbiol. 66 (6): 2454. doi:10.1099/ijsem.0.001210
 Chen, Dong (2005): Proteiniphilum acetatigenes gen. nov., sp. nov., from a UASB reactor treating brewery wastewater. Int. J. Syst. Evol. Microbiol. 55 (Pt 6): 2257-61. doi:10.1099/ijs.0.63807-0
 Tomazetto, Hahnke, Wibberg, Pühler, Klocke, Schlüter, et al. (2018): str. M3/6 isolated from a laboratory biogas reactor is versatile in polysaccharide and oligopeptide utilization as deduced from genome-based metabolic reconstructions. Biotechnol Rep (Amst) 18 (): e00254. doi:10.1016/j.btre.2018.e00254