Deoxycytidine triphosphate

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== Deoxycytidine triphosphate ==

Deoxycytidine triphosphate (dCTP) is a deoxyribonucleotide and a building block of DNA. It is one of the four nucleotides that are incorporated into DNA during the process of DNA replication. The other three nucleotides are deoxyadenosine triphosphate (dATP), deoxyguanosine triphosphate (dGTP), and deoxythymidine triphosphate (dTTP).

Structure

dCTP consists of three components: a deoxyribose sugar, a cytosine base, and three phosphate groups. The deoxyribose sugar is a five-carbon sugar that lacks an oxygen atom at the 2' position, distinguishing it from ribose found in RNA. The cytosine base is one of the four nitrogenous bases in DNA, and the three phosphate groups are linked in a chain, providing the energy necessary for the formation of the phosphodiester bond during DNA synthesis.

Function

dCTP plays a crucial role in the synthesis of DNA. During DNA replication, dCTP is added to the growing DNA strand by the enzyme DNA polymerase. The incorporation of dCTP into DNA is guided by the complementary base pairing rules, where cytosine pairs with guanine.

Synthesis

dCTP is synthesized from deoxycytidine diphosphate (dCDP) through the action of the enzyme nucleoside diphosphate kinase, which adds a phosphate group to dCDP to form dCTP. This process is part of the nucleotide salvage pathway, which recycles nucleotides for DNA synthesis.

Metabolism

The metabolism of dCTP is tightly regulated to ensure a balanced supply of deoxyribonucleotides for DNA replication and repair. Imbalances in dCTP levels can lead to genomic instability and are associated with various genetic disorders and cancer.

Related Pages

• DNA replication
• DNA polymerase
• Deoxyribonucleotide
• Deoxyadenosine triphosphate
• Deoxyguanosine triphosphate
• Deoxythymidine triphosphate
• Nucleotide salvage pathway
• Genomic instability

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