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Related Concept Videos

Termination of Translation01:44

Termination of Translation

The large ribosomal subunit has several important structures essential to translation. These include the peptidyl transferase center (PTC) - which is the site where the peptide bond is formed - and a large, internal, water-filled tube through which the nascent polypeptide moves. This latter structure is called the Peptide Exit Tunnel, and it begins at the PTC and spans the body of the large ribosomal subunit. During translation, as the nascent polypeptide chain is synthesized, it passes through...
Termination of Translation01:44

Termination of Translation

The large ribosomal subunit has several important structures essential to translation. These include the peptidyl transferase center (PTC) - which is the site where the peptide bond is formed - and a large, internal, water-filled tube through which the nascent polypeptide moves. This latter structure is called the Peptide Exit Tunnel, and it begins at the PTC and spans the body of the large ribosomal subunit. During translation, as the nascent polypeptide chain is synthesized, it passes through...
Taping Over Different Ground Profiles01:12

Taping Over Different Ground Profiles

Taping over varying ground profiles requires careful adaptation to achieve accurate measurements. On smooth, level ground with minimal vegetation, the tape can rest directly on the ground. Here, the taping team, typically consisting of a head and a rear tapeman, coordinates their positions with clear communication. The rear tapeman holds the tape at the starting point and guides the head tapeman toward a range pole placed beyond the endpoint, using hand or voice signals to ensure alignment.On...
Transcription Attenuation in Prokaryotes02:42

Transcription Attenuation in Prokaryotes

Transcriptional attenuation occurs when RNA transcription is prematurely terminated due to the formation of a terminator mRNA hairpin structure.  Bacteria use these hairpins to regulate the transcription process and control the synthesis of several amino acids including histidine, lysine, threonine, and phenylalanine. Transcription attenuation takes place in the non-coding regions of mRNA.
There are several different mechanisms used to attenuate transcription. In ribosome mediated...
Evaluating Limits by Direct Substitution01:29

Evaluating Limits by Direct Substitution

In the analysis of functions that represent continuous physical phenomena, it is often necessary to determine the output value as the input approaches a specific point. When a combination of algebraic terms defines the function and exhibits no discontinuities or abrupt changes near the point of interest, the limit of the function can be evaluated directly. This process, known as direct substitution, involves replacing the variable in the expression with the value it approaches.Direct...
Social Traps01:41

Social Traps

Social traps are negative situations where people get caught in a direction or relationship that later proves to be unpleasant, with no easy way to back out of or avoid. The concept was orignally introduced by John Platt who applied psychology to Garrett Hardin's "Tragedy of the Commons", where in New England herd owners could let their cattle graze in the common ground. This situation seems like a good idea, but an individual could have an advantage. If they owned more cows, the larger...

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Termination at sTop2.

Robert C Alver1, Anja-Katrin Bielinsky

  • 1Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA.

Molecular Cell
|August 28, 2010
PubMed
Summary
This summary is machine-generated.

Researchers mapped DNA replication termination sites in yeast, finding most are protected by topoisomerase 2. This enzyme shields these crucial regions, preventing genomic instability and ensuring DNA replication fidelity.

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Area of Science:

  • Molecular biology
  • Genetics
  • Cellular processes

Background:

  • DNA replication is a fundamental process for cell division.
  • Replication termination sites (TERs) are critical for completing DNA replication accurately.
  • Understanding TERs is essential for maintaining genomic stability.

Discussion:

  • Fachinetti et al. present the first comprehensive map of TERs in Saccharomyces cerevisiae.
  • The study reveals that topoisomerase 2 is frequently found at TERs.
  • This suggests a protective role for topoisomerase 2 at these sites.

Key Insights:

  • The majority of replication termination sites are occupied by topoisomerase 2.
  • Topoisomerase 2 acts as a shield, protecting TERs from genomic instability.
  • This finding provides new insights into the mechanisms of DNA replication termination and genome maintenance.

Outlook:

  • Further research could explore the precise mechanisms by which topoisomerase 2 protects TERs.
  • Investigating whether similar mechanisms are conserved in other organisms.
  • Potential implications for understanding age-related genomic instability and cancer.