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Primase
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DNA primase is an enzyme involved in the replication of DNA and is a type of RNA polymerase. Primase catalyzes the synthesis of a short RNA segment called a primer complementary to a ssDNA template. A
Figure 1. Select multifunctional primases across three domains of life (eukaryota, archaea, and bacteria). The ability of a primase to perform a parti
Figure 1. Select multifunctional primases across three domains of life (eukaryota, archaea, and bacteria). The ability of a primase to perform a particular activity is indicated by a check mark. Adapted from.
RNA polymerase
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In molecular biology, RNA polymerase, or more specifically DNA-directed/dependent RNA polymerase, is an enzyme that catalyzes the chemical reactions that synthesize RNA from a DNA template strand.
Primase
…DNA primase is an enzyme involved in the replication of DNA and is a type of RNA polymerase. Primase catalyzes the synthesis of a short RNA (or DNA in some living organisms) segment called a primer complementary to a ssDNA (single-stranded…
RNA polymerase hetero 27-mer, human
RNA polymerase hetero 27-mer, human
An electron-micrograph of DNA strands decorated by hundreds of RNAP molecules too small to be resolved. Each RNAP is transcribing an RNA strand, which
An electron-micrograph of DNA strands decorated by hundreds of RNAP molecules too small to be resolved. Each RNAP is transcribing an RNA strand, which can be seen branching off from the DNA. "Begin" indicates the 3′ end of the DNA, where RNAP initiates transcription; "End" indicates the 5′ end, where the longer RNA molecules are completely transcribed.
RNAP from T. aquaticus pictured during elongation. Portions of the enzyme were made transparent so as to make the path of RNA and DNA more clear. The
RNAP from T. aquaticus pictured during elongation. Portions of the enzyme were made transparent so as to make the path of RNA and DNA more clear. The magnesium ion (yellow) is located at the enzyme active site.
T7 RNA polymerase producing a mRNA (green) from a DNA template. The protein is shown as a purple ribbon (PDB: 1MSW​)
T7 RNA polymerase producing a mRNA (green) from a DNA template. The protein is shown as a purple ribbon (PDB: 1MSW​)