Formation and regeneration of Methanococcus voltae protoplasts

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TypeArticle
Journal titleApplied and Environmental Microbiology
Volume59
Pages2733; # of pages: 7
AbstractMethanococcus voltae cells were converted into protoplasts by suspension in anaerobic 0.1 M Tris-HCl buffer containing 0.4 M sucrose and 0.05 M NaCl as osmoprotectants. Protoplast formation was monitored microscopically by observing the conversion of the typical irregularly shaped (uneven peripheries) coccoid whole cells to rounded forms with smooth peripheries. Although the procedure resulted in about 50% lysis of the initial number of cells, the remainder were converted to the rounded form. Analysis by sodium dodecyl sulfate-polyacrylamide gel electrophoresis and electron microscopy of negatively stained cell preparations indicated that the treatment removed the wall layer from whole cells to yield protoplasts. Protoplast regeneration was evaluated by using optimized plating conditions and an anaerobic microplating technique. Between 50 and 63% of the initial number of protoplasts regenerated as colonies on agar medium (35 degrees C, 7 days). The colony and cell morphologies of the regenerated protoplasts were indistinguishable from those of whole cells plated under identical conditions.
Publication date
LanguageEnglish
AffiliationNRC Institute for Biological Sciences; National Research Council Canada
Peer reviewedNo
NRC numberPATEL1993A
34288
NPARC number9359914
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Record identifiere73acfad-cc76-44a1-b43c-77cad6c9ab20
Record created2009-07-10
Record modified2016-05-09
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