Ribosome: Difference between revisions
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The small subunit of the prokaryotic ribosome sediments at 30S<ref>[http://en.wikipedia.org/wiki/Svedberg Svedberg unit] in Wikipedia</ref>. It is composed of a 16S chain of RNA about 1,500 bases long (~500 kDa), plus about 20 protein chains. The proteins in the first small subunit determined range from about 3 kDa to 29 kDa. | The small subunit of the prokaryotic ribosome sediments at 30S<ref>[http://en.wikipedia.org/wiki/Svedberg Svedberg unit] in Wikipedia</ref>. It is composed of a 16S chain of RNA about 1,500 bases long (~500 kDa), plus about 20 protein chains. The proteins in the first small subunit determined range from about 3 kDa to 29 kDa. | ||
The large subunit of the prokaryotic ribosome sediments at 50S. It is composed of two chains of RNA, a 23S chain (~3000 bases long, 946 kDa) and a 5S chain (~120 bases long, 39 kDa). Assembled with the RNA are about 30 protein chains. The proteins in the first large subunit determined range from 6 kDa to 37 kDa. See also [[Large Ribosomal Subunit of Haloarcula]]. | The large subunit of the prokaryotic ribosome sediments at 50S. It is composed of two chains of RNA, a 23S chain (~3000 bases long, 946 kDa) and a 5S chain (~120 bases long, 39 kDa). Assembled with the RNA are about 30 protein chains. The proteins in the first large subunit determined range from 6 kDa to 37 kDa. See also [[Large Ribosomal Subunit of Haloarcula]]. The large subunit contains several [[Kink-turn motif]]s. | ||
Other macromolecules in a functioning ribosome include three transfer RNA molecules, messenger RNA, and the nascent protein chain. | Other macromolecules in a functioning ribosome include three transfer RNA molecules, messenger RNA, and the nascent protein chain. | ||