From ActinoBase


Streptacidiphilus (etymology: twisted, acid-loving) are one of the three genera belonging to the Streptomycetaceae family, along with Streptomyces and Kitasatospora. First proposed as an additional genus by Kim et al., (2003) , Streptacidiphilus bacteria have been shown to thrive in acidic environments such as forest soils or waste.


On a plate, Streptacidiphilus grows similarly to other genera in its family. The bacteria are filamentous and spore-forming with an ideal pH of 3.5-6.0 for effective growth at 30°C. Their morphology depends on the choice of media (ISP-2 and ISP-3 have previously shown to be preferred choices), however media such as SFM can also be used as long as the pH range lies between the ideal pH.

Secondary metabolites

Similar to other members of the family, Streptacidiphilus are expected to produce a large range of secondary metabolites. In the literature however, it has only been speculated as to what metabolites these are. Due to the natural low pH environments of the bacteria, Streptacidiphilus is seen as a novel source of acid-stable enzymes and antibiotics, highlighting the importance of these acidophiles.


  1. Golinska, P., Ahmed, L., Wang, D., & Goodfellow, M. (2013). Streptacidiphilus durhamensis sp. nov., isolated from a spruce forest soil. Antonie van Leeuwenhoek, 104(2), 199–206. doi:10.1007/s10482-013-9938-9
  2. Kämpfer P., Glaeser S.P., Parkes L., van Keulen G., Dyson P. (2014) The Family Streptomycetaceae. In: Rosenberg E., DeLong E.F., Lory S., Stackebrandt E., Thompson F. (eds) The Prokaryotes. Springer, Berlin, Heidelberg
  3. Kim S.B., Lonsdale, J., Seong, C.N., Goodfellow, M. (2003). Streptacidiphilus gen. nov., acidophilic actinomycetes with wall chemotype I and emendation of the family Streptomycetaceae (Waksman and Henrici (1943)AL) emend. Rainey et al. 1997, Antonie Van Leeuwenhoek, Vol 83(2), 107-116