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The Central Dogma01:25

The Central Dogma

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Overview
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From DNA to Protein03:06

From DNA to Protein

20.7K
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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Reporter Genes02:11

Reporter Genes

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Reporter genes are a type of protein-coding gene that are often tagged to a gene of interest. Once inside a target cell, reporter genes usually produce visually identifiable characteristics like fluorescence and luminescence when expressed along with the gene of interest. Thus, reporter genes “report” the presence or absence of genes of interest in an organism, determine the gene expression pattern, or track the physical location of a DNA segment or protein in the cell.
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The Central Dogma01:20

The Central Dogma

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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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Repressible Operon: trp Operon01:21

Repressible Operon: trp Operon

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The trp operon in Escherichia coli exemplifies a repressible operon. It regulates the synthesis of tryptophan through repressor-mediated transcriptional control and attenuation. This dual regulatory mechanism ensures tryptophan biosynthesis occurs only when needed, conserving cellular resources.Structure of the trp OperonThe trp operon consists of five structural genes (trpE, trpD, trpC, trpB, and trpA) that encode enzymes for tryptophan biosynthesis. These genes are transcribed as a single...
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Stringent Response in E. coli01:23

Stringent Response in E. coli

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Bacterial growth is closely tied to nutrient availability, with cells proliferating exponentially under favorable conditions and entering a stationary phase when resources become scarce. This transition is mediated by a regulatory mechanism known as the stringent response, which allows bacteria to adapt to nutrient deprivation by modulating gene expression and metabolic activity.During nutrient scarcity, intracellular amino acid levels decline. It results in the accumulation of uncharged tRNAs...
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関連する実験動画

Updated: May 2, 2026

Engineering 'Golden' Fluorescence by Selective Pressure Incorporation of Non-canonical Amino Acids and Protein Analysis by Mass Spectrometry and Fluorescence
11:51

Engineering 'Golden' Fluorescence by Selective Pressure Incorporation of Non-canonical Amino Acids and Protein Analysis by Mass Spectrometry and Fluorescence

Published on: April 27, 2018

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プロタミンのようなタンパク質をコードするE. coliの遺伝子.

S Altman, P Model, G H Dixon

    Cell
    |November 1, 1981
    PubMed
    まとめ
    この要約は機械生成です。

    研究者らは,の精子プロタミンに似た,プロタミンのようなタンパク質をコードするE. coliの遺伝子を特定した. この発見は,細菌の遺伝子発現とタンパク質合成に光を当てています.

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    Antimicrobial Peptides Produced by Selective Pressure Incorporation of Non-canonical Amino Acids
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    Identifying Amino Acid Overproducers Using Rare-Codon-Rich Markers
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    Identifying Amino Acid Overproducers Using Rare-Codon-Rich Markers

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    関連する実験動画

    Last Updated: May 2, 2026

    Engineering 'Golden' Fluorescence by Selective Pressure Incorporation of Non-canonical Amino Acids and Protein Analysis by Mass Spectrometry and Fluorescence
    11:51

    Engineering 'Golden' Fluorescence by Selective Pressure Incorporation of Non-canonical Amino Acids and Protein Analysis by Mass Spectrometry and Fluorescence

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    Antimicrobial Peptides Produced by Selective Pressure Incorporation of Non-canonical Amino Acids
    11:56

    Antimicrobial Peptides Produced by Selective Pressure Incorporation of Non-canonical Amino Acids

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    Identifying Amino Acid Overproducers Using Rare-Codon-Rich Markers
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    Identifying Amino Acid Overproducers Using Rare-Codon-Rich Markers

    Published on: June 24, 2019

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    科学分野:

    • 分子生物学は分子生物学である.
    • 遺伝学 遺伝学とは
    • バイオケミストリー バイオケミストリー

    背景:

    • E. coli のゲノムには,tRNATyr/1 遺伝子の近くに開いた読み取り枠が含まれています.
    • 1つの配列は33アミノ酸ポリペプチドをコードし,の精子プロタミンに類似しています.

    研究 の 目的:

    • E. coli. のtRNATyr/1遺伝子の近くにあるプロタミン型のタンパク質遺伝子の機能を調査する.
    • このタンパク質のインビトロ合成と調節を確認するために.

    主な方法:

    • tRNATyr/1 su3+遺伝子を運ぶトランスデュースファージ phi 80 を利用した.
    • ホモログなDNAを用いた in vitro タンパク質合成アッセイを実施しました.
    • 遺伝子の機能を評価するために導入された削除.
    • タンパク質合成に対するppGppの観察された効果.

    主要な成果:

    • phi 80 tRNATyr/1 su3+ファグのDNAは,2つの小さな基本的なタンパク質の合成を in vitroで指示しました.
    • su3+遺伝子とプロタミン型の遺伝子を重複した削除により,タンパク質合成が廃止されました.
    • su3+フェノタイプの再獲得により,タンパク質合成が回復した.
    • 基本タンパク質の合成はppGppによって阻害され,tRNATyr/1.1との共転写が示唆された.

    結論:

    • プロタミンのようなタンパク質は,tRNATyr/1遺伝子の近くにあるE. coliのゲノムにコードされています.
    • この遺伝子の発現は,tRNATyr/1遺伝子のプロモーターと関連しており,ppGppによって調節されています.