Prab: CSV import

2025-02-18T11:05:16Z

CSV import

← Older revision		Revision as of 11:05, 18 February 2025
Line 36:		Line 36:

	{{stub}}		{{stub}}
			<gallery>
			File:Origins_of_DNA_replication_Figure_1.jpg\|Origin of replication
			File:CC-BY_icon.svg\|Origin of replication
			File:Origins_of_DNA_replication_Figure_2.jpg\|Origin of replication
			File:Origins_of_DNA_replication_Figure_3.jpg\|Origin of replication
			File:Origins_of_DNA_replication_Figure_4.jpg\|Origin of replication
			File:Hhv6_genome2.png\|Origin of replication
			</gallery>

Prab: CSV import

2024-02-23T23:35:18Z

CSV import

New page

'''Origin of Replication'''

The '''[[Origin of replication]]''' (also called '''replication origin''' or '''ORI''') is a particular sequence in a [[genome]] where [[DNA replication]] begins. This can either involve the duplication of an entire [[chromosome]] or a small [[DNA molecule]].

== Overview ==

In [[molecular biology]], the origin of replication is the DNA sequence that functions as a starting point for DNA replication. In [[bacteria]], this is typically a single point, whereas in [[eukaryotes]], there are multiple replication origins on the DNA molecule. The specific structure of the origin of replication varies somewhat from species to species, but all share some common characteristics.

== Function ==

The origin of replication is crucial for DNA replication because it provides a point of entry for the enzymes that carry out this process. These enzymes, known as [[DNA polymerases]], cannot initiate the synthesis of a new DNA strand on their own. Instead, they require a primer to which they can add nucleotides. The origin of replication provides this primer.

== Structure ==

The structure of the origin of replication is a specific sequence of nucleotides. This sequence is recognized by certain proteins that bind to the DNA and initiate replication. In bacteria, the origin of replication is a single sequence of about 245 base pairs, known as the DnaA box. In eukaryotes, the origin of replication is more complex and can involve multiple sequences of DNA.

== Replication Process ==

The process of DNA replication begins when the proteins that recognize the origin of replication bind to the DNA. This binding causes the DNA to unwind, creating a replication fork. DNA polymerases then add nucleotides to the primer, synthesizing a new DNA strand.

== See also ==

* [[DNA replication]]
* [[DNA polymerase]]
* [[Replication fork]]
* [[Genome]]
* [[Chromosome]]

== References ==

<references />

[[Category:Genetics]]
[[Category:Molecular biology]]
[[Category:DNA replication]]

{{stub}}

Origin of replication - Revision history

Prab: CSV import

Prab: CSV import