Methanocorpusculum bavaricum
Mandy Wedertz
In 1989, G. Zellner, E. Stackebrandt, P. Messner, B. J. Tindall, E. Conway de Macario, H. Kneifel, U.B. Sleytr, & J. Winter discovered two new strains of methanogenic bacteria.  The first, Methanocorpusculum sinense, in a pilot plant for treatment of distillery wastewater in Chengdu (Providence Sichuan, China).  The other, Methanocorpusculum bavaricum, was discovered in the wastewater pond of the sugar factory in Regensburg (Bavaria, Germany).

Methanocorpusculum bavaricum is a weakly motile strain, consisting of irregularly coccoid cells, with a diameter of about 1 micron.  The cell envelope consists of a cytoplasmic membrane and an S-layer, the S-layer is composed of glycoprotein subunits (with molecular weights of 94,000) arranged in a hexagonal pattern.

M. bavaricum is a mesophile and has an optimum pH of about 7. This organism produces methane from H2/CO2, formate, 2-propanol/CO2, and butanol/CO2.  The G+C content of the DNA was determined to be 47.7-53.6 mol% by a number of different methods.

A distinct lipid pattern in M. bavaricum, was also found in M. parvum and M. sinense, indicating a close relationship between the three.  Also, the polyamine patterns of these three are similar to each other, all characterized by a high concentration of otherwise rare, 1,3 diaminopropane.  Another interesting distinguishing feature is that of the antigenic fingerprint of the members of Methanocorpusculum.  Quantitative comparison revealed no antigenic relationship with any of the reference methanogens tested.  This lead to the establishment of a new methanogen family, the Methallocorpusculacea Family.


*Disclaimer - This report was written by a student participaring in a microbiology course at the Missouri University of Science and Technology. The accuracy of the contents of this report is not guaranteed and it is recommended that you seek additional sources of information to verify the contents.


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