Related Concept Videos
02:27DNA Base Pairing
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,
02:27DNA Base Pairing
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,
02:05DNA as a Genetic Template
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...
02:27Base-pairing and DNA Repair
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,
01:31Proofreading
Synthesis of new DNA molecules is carried out by the enzyme DNA polymerase, which adds nucleotides on the daughter strand complementary to the template DNA strand. DNA polymerase has a higher affinity to add the correct base and ensures fidelity during DNA replication. Furthermore, it exhibits proofreading activity during replication, using an exonuclease domain that cuts off incorrect nucleotides from the nascent DNA strand.
Errors During Replication are Corrected by the DNA Polymerase Enzyme
Errors During Replication are Corrected by the DNA Polymerase Enzyme
01:43Proofreading
Synthesis of new DNA molecules starts when DNA polymerase links nucleotides together in a sequence that is complementary to the template DNA strand. DNA polymerase has a higher affinity for the correct base to ensure fidelity in DNA replication. The DNA polymerase furthermore proofreads during replication, using an exonuclease domain that cuts off incorrect nucleotides from the nascent DNA strand.Errors during Replication Are Corrected by the DNA Polymerase EnzymeGenomic DNA is synthesized in...
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Related Experiment Video
Updated: Jul 10, 2026
16:24
Analyzing and Building Nucleic Acid Structures with 3DNA
Published on: April 26, 2013
Model systems for understanding DNA base pairing.
Andrew T Krueger1, Eric T Kool
1Department of Chemistry, Stanford University, Stanford, CA 94305-5080, USA.
Current Opinion in Chemical Biology
|October 31, 2007
Summary
Nucleic acid base pairing is imperfect in water; proteins enhance this recognition for biological information transfer. Modified nucleobases help study these context-dependent recognition mechanisms.
Area of Science:
- Biochemistry
- Molecular Biology
- Chemical Biology
Background:
- Nucleic acid bases form pairs, a fundamental biological process.
- Base pairing in water lacks the selectivity and efficiency for accurate biological information transmission.
- Proteins play a crucial role in enhancing nucleic acid base recognition, with context-dependent mechanisms.
Purpose of the Study:
- To investigate how the chemical differences of the four nucleobases are recognized within diverse biological contexts.
- To explore the role of modified nucleobases in understanding biological recognition mechanisms.
Main Methods:
- Utilizing modified nucleobases with altered polarity, shape, size, and functional groups.
- Reviewing recent advances in chemical and biochemical research on nucleobase recognition.
Main Results:
- Modified nucleobases provide tools to probe the chemical distinctions of base recognition.
- Recent research highlights the variability of protein-mediated recognition mechanisms based on biological context.
Conclusions:
- Understanding nucleobase recognition requires considering both inherent chemical properties and biological context.
- Modified nucleobases are essential for dissecting the complex mechanisms of biological information transfer.