Adenine Thymine
Adenine Thymine - Related Videos
09:14
DamID-seq: Genome-wide Mapping of Protein-DNA Interactions by High Throughput Sequencing of Adenine-methylated DNA Fragments
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Cited by 21 •
2016
We describe herein an assay by coupling DNA adenine methyltransferase identification (DamID) to high throughput sequencing (DamID-seq). This improved method provides a higher resolution and a wider dynamic range, and allows analyzing DamID-seq data in conjunction with other high throughput sequencing data such as ChIP-seq, RNA-seq, etc.
02:27
DNA Base Pairing
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2020
Erwin Chargaff’s rules on DNA equivalence paved the way for the discovery of base pairing in DNA. Chargaff’s rules state that in a double-stranded DNA molecule, the amount of adenine (A) is equal to the amount of thymine (T); the amount of guanine (G) is equal to the amount of cytosine (C); and the sum of purines, A and G, is equal to the sum of pyrimidines, C and T (i.e., A+G = C+T). Later work by Watson and Crick revealed that in double-stranded DNA, A always forms two hydrogen bonds...
02:43
Nucleic Acids
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2020
Nucleic acids are the most important macromolecules for the continuity of life. They carry the cell's genetic blueprint and carry instructions for its functioning. DNA and RNA The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes, the...
01:23
Types of RNA
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2019
Overview Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use. RNA...
02:05
DNA as a Genetic Template
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2020
Two structural features of the DNA molecule provide a basis for the mechanisms of heredity: the four nucleotide bases and its double-stranded nature. The Watson-Crick model of double-helical DNA structure, proposed in 1952, drew heavily upon the X-ray crystallography work of researchers Rosalind Franklin and Maurice Wilkins. Watson, Crick, and Wilkins jointly received the Nobel Prize in Physiology or Medicine for their work in 1962. Franklin was, controversially, excluded from the prize for...
FAQs
The two hydrogen bonds provide a defined, reversible connection between the complementary bases. This interaction contributes to the stability of the DNA double helix without making the strands permanently inseparable. That balance is chemically important because DNA must preserve sequence information while still allowing strand separation during replication and transcription.
Selective pairing depends on both molecular shape and the arrangement of hydrogen-bond donors and acceptors. Adenine’s purine framework and thymine’s pyrimidine framework present a compatible pattern and fit within the double-helix structure. This chemical and geometric complementarity helps DNA maintain an ordered sequence instead of forming indiscriminate base associations.
Pairing a larger purine with a smaller pyrimidine supports the organized geometry required by the DNA double helix. The relationship between adenine and thymine therefore involves more than hydrogen bonding alone: their shapes help maintain structural regularity while their donor-acceptor patterns establish selective recognition. Together, these features support stable genetic material.
Adenine-thymine interactions stabilize DNA when the strands remain paired, yet they can be disrupted when the strands separate. This reversibility allows the stored sequence to become accessible during replication and transcription. The same chemical feature therefore supports two complementary requirements: preserving genetic information in the helix and making that information available for biological copying or use.
Sequence analysis and nucleic-acid probes rely on complementary recognition to identify matching DNA sequences. Adenine-thymine pairing contributes to that recognition by linking a probe or analyzed sequence to its appropriate complement through the expected hydrogen-bond pattern. This makes the pair relevant to approaches that examine genetic information and distinguish sequences through molecular complementarity.
Polymerase-based methods and genetic engineering depend on the information encoded in DNA sequences and on accurate complementary recognition. Adenine-thymine chemistry provides one of the pairing relationships that helps preserve and interpret that information. Its importance extends from analyzing existing sequences to manipulating genetic material in research applications involving nucleic acids.
Changes involving adenine-thymine pairing can be considered in studies of mutations and DNA repair because the pair contributes to accurate sequence organization in DNA. Examining its hydrogen-bonding pattern, shape, and position within a sequence helps connect molecular structure with possible changes in genetic information. This provides chemical context for investigating how DNA is preserved or altered.