RNA polymerase II: Difference between revisions
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RNA polymerase II is found in [[Eukaryotic cells|eukaryotic cells]] and is structurally similar to [[RNA polymerase I]] and [[ | RNA polymerase II is found in [[Eukaryotic cells|eukaryotic cells]] and is structurally similar to [[RNA polymerase I]] and [[RNA polymerase III|III]] with all three sharing common subunits. It is used to transcribe all [[Protein|protein]]-encoding [[Genes|genes]], and in addition, many of the small nucleolar RNAs ([[SnoRNA|snoRNA]]) and the majority of the [[Micro RNA|micro RNAs]] (miRNA)<ref>Wilhelm E et al (2012)'Probing Endogenous RNA Polymerase II Pre-initiation Complexes by Electrophoretic Mobility Shift Assay', Methods Mol Biol. 809:63-74</ref>. RNA polymerase II cannot transcribe [[DNA|DNA]] on its own: the many elements that make up the [[Pre Initiation Complex|pre-initiation complex]] (PIC) must assemble at the site of the promoter in order for RNA polymerase II to be recruited and begin transcription <ref>Seizl M et al. (2011). A Conserved GA Element in TATA-Less RNA Polymerase II Promoters. PLoS One. 6 (11), e27595</ref>. The PIC is made up of Transcription Factors: [[TFIID|TFIID]], [[TFIIA|TFIIA]], [[TFIIB|TFIIB]], [[TFIIF|TFIIF]], [[TFIIE|TFIIE]], [[TFIIH|TFIIH]] <ref>D. B. Nikolov et al. (1997). RNA polymerase II transcription initiation: A structural view. PNAS. 94 (1), 15-22.</ref>. | ||
It has a very similar structure to its prokaryotic counterpart but is made up of many more subunits with a total of twelve. | It has a very similar structure to its prokaryotic counterpart but is made up of many more subunits with a total of twelve. | ||
Revision as of 20:26, 1 December 2015
RNA polymerase II is found in eukaryotic cells and is structurally similar to RNA polymerase I and III with all three sharing common subunits. It is used to transcribe all protein-encoding genes, and in addition, many of the small nucleolar RNAs (snoRNA) and the majority of the micro RNAs (miRNA)[1]. RNA polymerase II cannot transcribe DNA on its own: the many elements that make up the pre-initiation complex (PIC) must assemble at the site of the promoter in order for RNA polymerase II to be recruited and begin transcription [2]. The PIC is made up of Transcription Factors: TFIID, TFIIA, TFIIB, TFIIF, TFIIE, TFIIH [3].
It has a very similar structure to its prokaryotic counterpart but is made up of many more subunits with a total of twelve.
References
- ↑ Wilhelm E et al (2012)'Probing Endogenous RNA Polymerase II Pre-initiation Complexes by Electrophoretic Mobility Shift Assay', Methods Mol Biol. 809:63-74
- ↑ Seizl M et al. (2011). A Conserved GA Element in TATA-Less RNA Polymerase II Promoters. PLoS One. 6 (11), e27595
- ↑ D. B. Nikolov et al. (1997). RNA polymerase II transcription initiation: A structural view. PNAS. 94 (1), 15-22.