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Related Concept Videos

The Central Dogma01:25

The Central Dogma

Overview
The Central Dogma01:20

The Central Dogma

The central dogma explains the flow of genetic information from DNA nucleotides to the amino acid sequence of proteins.
RNA is the Missing Link Between DNA and Proteins
In the early 1900s, scientists discovered that DNA stores all the information needed for cellular functions and that proteins perform most of these functions. However, the mechanisms of converting genetic information into functional proteins remained unknown for many years. Initially, it was believed that a single gene is...
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The flow of genetic information in cells from DNA to mRNA to protein is described by the central dogma, which states that genes specify the sequence of mRNAs, which in turn specify the sequence of amino acids making up all proteins. The decoding of one molecule to another is performed by specific proteins and RNAs. Because the information stored in DNA is so central to cellular function, it makes intuitive sense that the cell would make mRNA copies of this information for protein synthesis...
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tRNA Activation

Aminoacyl-tRNA synthetases are present in both eukaryotes and bacteria. Though eukaryotes have 20 different aminoacyl-tRNA synthetases to couple to 20 amino acids, many bacteria do not have genes for all of these aminoacyl-tRNA synthetases. Despite this, they still use all 20 amino acids to synthesize their proteins. For instance, some bacteria do not have the gene encoding the enzyme that couples glutamine with its partner tRNA. In these organisms, one enzyme adds glutamic acid to all of the...
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Aminoacyl-tRNA synthetases are present in both eukaryotes and bacteria. Though eukaryotes have 20 different aminoacyl-tRNA synthetases to couple to 20 amino acids, many bacteria do not have genes for all of these aminoacyl-tRNA synthetases. Despite this, they still use all 20 amino acids to synthesize their proteins. For instance, some bacteria do not have the gene encoding the enzyme that couples glutamine with its partner tRNA. In these organisms, one enzyme adds glutamic acid to all of the...
Nonsense-mediated mRNA Decay02:27

Nonsense-mediated mRNA Decay

The Upf proteins that carry out nonsense-mediated decay (NMD) are found in all eukaryotic organisms, including humans. Each protein has an individual role, but they need to work in collaboration. Upf1 is an ATP-dependent RNA helicase that unwinds the RNA helix. Because Upf1 can unwind any RNA, Upf2 and Upf3 are required to help Upf1 discriminate between nonsense and normal mRNAs.
Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...

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De novo Identification of Actively Translated Open Reading Frames with Ribosome Profiling Data
08:23

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Towards deciphering the principles underlying an mRNA recognition code.

Alexander Serganov1, Dinshaw J Patel

  • 1Structural Biology Program, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA. serganoa@mskcc.org

Current Opinion in Structural Biology
|February 8, 2008
PubMed
Summary
This summary is machine-generated.

Messenger RNAs (mRNAs) interact with molecules that control gene expression via specific signals. Recent structural studies reveal diverse recognition principles used by mRNA binders for precise targeting and processing.

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Area of Science:

  • Molecular Biology
  • Gene Expression Regulation
  • Structural Biology

Background:

  • Messenger RNAs (mRNAs) play a crucial role in gene expression.
  • mRNA fate is determined by interactions with various molecules.
  • These interactions are guided by specific mRNA signals, forming a recognition code.

Purpose of the Study:

  • To review recent structural studies on mRNA-protein and mRNA-small molecule interactions.
  • To illustrate the diverse recognition principles governing mRNA binding.
  • To highlight how these principles enable timely and specific mRNA targeting and processing.

Main Methods:

  • Review of structural biology studies.
  • Analysis of diverse mRNA binding modes.
  • Examination of sequence and structural context in mRNA recognition.

Main Results:

  • Identified diverse binding modes for proteins and small molecules interacting with mRNA.
  • Demonstrated the importance of the structural context surrounding target sequences.
  • Highlighted specific recognition principles employed by mRNA binders.

Conclusions:

  • mRNA recognition involves a complex interplay of signals and binding modes.
  • Structural context is critical for the specificity and timing of mRNA interactions.
  • Understanding these principles is key to deciphering gene expression regulation.