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- In bacteria, bacterial plasmids, bacteriophage, mitochondria, DNA animal viruses, and DNA plant viruses, the nucleotide sequence at the replication origin is essential for DNA unwinding to begin. Therefore, these replication origins are also termed as “replicators” because they are essential for initiation of DNA replication.
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May 29, 2019 · Traditionally, three scenarios for the origin of viruses have been considered: descent from primordial, precellular genetic elements, reductive evolution from cellular ancestors and escape of...
- Nature
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- DNA replication origins: from sequence specificity to epigenetics
Small genomes of bacteria and viruses replicate as a single...
- Origin of Viruses | Learn Science at Scitable - Nature
Viruses, then, may have existed before bacteria, archaea, or...
- Nature
Viruses often possess a single origin of replication. A variety of proteins have been described as being involved in viral replication. For instance, Polyoma viruses utilize host cell DNA polymerases , which attach to a viral origin of replication if the T antigen is present.
Aug 1, 2001 · Small genomes of bacteria and viruses replicate as a single unit, from a single origin of replication. In larger genomes, initiation takes place at multiple origins (up to several thousand in a...
- Marcel Méchali
- 2001
Apr 21, 2024 · In bacteria, the initiation of replication occurs at the origin of replication, where supercoiled DNA is unwound by DNA gyrase, made single-stranded by helicase, and bound by single-stranded binding protein to maintain its single-stranded state.
In bacteria, bacterial plasmids, bacteriophage, mitochondria, DNA animal viruses, and DNA plant viruses, the nucleotide sequence at the replication origin is essential for DNA unwinding to begin. Therefore, these replication origins are also termed as “replicators” because they are essential for initiation of DNA replication.
Viruses, then, may have existed before bacteria, archaea, or eukaryotes (Figure 4; Prangishvili et al. 2006). Most biologists now agree that the very first replicating molecules consisted of RNA...
Feb 28, 2021 · They vary in their structure, their replication methods, and in their target hosts. Nearly all forms of life—from bacteria and archaea to eukaryotes such as plants, animals, and fungi—have viruses that infect them.
