How does prokaryotic transcription differ from eukaryotic

Prokaryotic transcription is carried out in the cytoplasm, where transcription is coupled with translation 1. This is probably due to the fact that it takes place in the cytoplasm and is subjected to nuclease degradation.

Another difference between prokaryotic and eukaryotic transcription are the subunits that make up the polymerases themselves. Eukaryotic Pol II is made up of 10 subunits.

Rpb1 and Rpb2 make up the bulk of the complex 6. Prokaryotes utilize a transcription factor sigma which is the smallest subunit of the structure that can easilty associate and dissociate from the core subunits.

Promoter sequences vary as well between prokaryotes and eukaryotes. Termination is quite diiferent among prokaryotes and eukaryotes also. In prokaryotes there are two paths that can be taken for termination. Atavism: Embryology, Development and Evolution. Gene Interaction and Disease.

Genetic Control of Aging and Life Span. Genetic Imprinting and X Inactivation. Genetic Regulation of Cancer. Obesity, Epigenetics, and Gene Regulation. Environmental Influences on Gene Expression. Gene Expression Regulates Cell Differentiation. Genes, Smoking, and Lung Cancer.

Negative Transcription Regulation in Prokaryotes. Operons and Prokaryotic Gene Regulation. Regulation of Transcription and Gene Expression in Eukaryotes. The Role of Methylation in Gene Expression. DNA Transcription. Reading the Genetic Code. Simultaneous Gene Transcription and Translation in Bacteria. Chromatin Remodeling and DNase 1 Sensitivity. Chromatin Remodeling in Eukaryotes. RNA Functions. Citation: Clancy, S. Nature Education 1 1 However, this is where the similarities between prokaryote and eukaryote expression end.

Aa Aa Aa. Transcription: An Overview. Transcription in Bacteria. Transcription in Eukaryotes. Figure 1. References and Recommended Reading Hahn, S. Poisonous principles of mushrooms of the genus Amanita : Four-carbon amines acting on the central nervous system and cell-destroying cyclic peptides are produced.

Science , — Article History Close. Share Cancel. Revoke Cancel. Keywords Keywords for this Article. Save Cancel. Flag Inappropriate The Content is: Objectionable. Flag Content Cancel. In eukaryotic transcription, with the DNA being associated with the protein, the process becomes complex.

The RNA processing takes place in the cytoplasm for prokaryotic transcription and in the nucleus for eukaryotic transcription. Eukaryotic transcription involves three types of RNA. RNA polymerase in prokaryotic transcription has 5 polypeptides. The promoter region is located upstream to the start site in both kinds of transcriptions but in eukaryotic transcription, sometimes, the promoter region is located downstream to the start site in RNA Polymerase III present only in eukaryotic transcription.

This is possible in eukaryotic transcription only when the initiation factors are present in the promoter region. While the Pribnow boxes are present at 10 locations in the case of prokaryotic transcription, they are absent in eukaryotic transcription. In eukaryotic transcription, TATA boxes are present base pairs before the start of the transcription initiation site of a gene.

Introns are absent in prokaryotic transcription and thus there is no splicing of mRNA.