Cell Structure
Staphylothermus marinus has a unique morphology. When nutrient levels are low, it forms grape-like clusters that range in diameter from 0.5–1.0 mm up to 100 clusters large. At high nutrient levels, large clustered cells up to 15 mm in diameter are found. The S-layer is made of a glycoprotein called tetrabrachion. Tetrabrachion is stable at high temperatures and resistant to chemicals that typically denature proteins. Tetrabrachion is built from 92,000 kDa polypeptides forming projections that react with other tetrabrachion sub units making a lattice framework that covers the cell. Tetrabrachion is resistant to heat and chemical denaturation. S. marinus has a circular chromosome with 1,610 protein-coding genes and 49 RNA genes. Staphylothermus hellenicus does not have tetrabrachion in the cell wall. It is an aggregated coccus, obligate anaerobe, heterotrophic, archeon that grows 0.8–1.3 μm in diameter. It forms large aggregates with up to 50 cells and has a circular chromosome that contains 158,0347 nucleotides, 1,599 protein-coding genes and 50 RNA genes.
Read more about this topic: Staphylothermus
Famous quotes containing the words cell and/or structure:
“It is plain that there is no separate essence called courage, no cup or cell in the brain, no vessel in the heart containing drops or atoms that make or give this virtue; but it is the right or healthy state of every man, when he is free to do that which is constitutional to him to do.”
—Ralph Waldo Emerson (1803–1882)
“I’m a Sunday School teacher, and I’ve always known that the structure of law is founded on the Christian ethic that you shall love the Lord your God and your neighbor as yourself—a very high and perfect standard. We all know the fallibility of man, and the contentions in society, as described by Reinhold Niebuhr and many others, don’t permit us to achieve perfection.”
—Jimmy Carter (James Earl Carter, Jr.)