This electron microscopy image shows Gemmata obscuriglobus. This and other PVC bacteria, the EMBL scientists discovered, have membrane-coat proteins associated with the membranes of sub-cellular compartments like the one shown in green, in which vesicles can be seen as dark green regions. The bacterium's DNA is colored purple.
Credit: Rachel Melwig & Christine Panagiotidis / Copyright EMBL
Although they are present almost everywhere, on land and sea, a group of related bacteria in the superphylum Planctomycetes-Verrucomicrobia-Chlamydiae, or PVC, have remained in relative obscurity ever since they were first described about a decade ago. Scientists at the European Molecular Biology Laboratory (EMBL) in Heidelberg, Germany, have discovered that these poorly-studied bacteria possess proteins thought to exist only in eukaryotes -- organisms whose cells have a nucleus.
The above story is based on materials provided by European Molecular Biology Laboratory. Note: Materials may be edited for content and length.
- Santarella-Mellwig et al. The Compartmentalized Bacteria of the Planctomycetes-Verrucomicrobia-Chlamydiae Superphylum Have Membrane Coat-Like Proteins. PLoS Biology, 2010; 8 (1): e1000281 DOI: 10.1371/journal.pbio.1000281
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European Molecular Biology Laboratory. "Membrane-coat proteins: Bacteria have them too." ScienceDaily. ScienceDaily, 22 January 2010. <www.sciencedaily.com/releases/2010/01/100120083747.htm>.
European Molecular Biology Laboratory. (2010, January 22). Membrane-coat proteins: Bacteria have them too. ScienceDaily. Retrieved April 18, 2014 from www.sciencedaily.com/releases/2010/01/100120083747.htm
European Molecular Biology Laboratory. "Membrane-coat proteins: Bacteria have them too." ScienceDaily. www.sciencedaily.com/releases/2010/01/100120083747.htm (accessed April 18, 2014).