Tryptophan repressor bound to DNA C015 / 6242
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Tryptophan repressor bound to DNA C015 / 6242
Tryptophan repressor bound to DNA. Molecular model of the tryptophan (trp) repressor (purple and green, and pink and beige, across bottom) bound to DNA (deoxyribonucleic) molecules (blue and orange, and green and yellow, across top). The trp repressor inhibits the expression of genes that code for the amino acid tryptophan, the trp operon, in Escherichia coli bacteria. When there is a plentiful supply of tryptophan in the environment the protein binds to the trp operon inhibiting gene expression. When levels of tryptophan in the cell fall, the repressor drops off and the bacterium begins to produce its own tryptophan
Science Photo Library features Science and Medical images including photos and illustrations
Media ID 9210141
© LAGUNA DESIGN/SCIENCE PHOTO LIBRARY
Bacterial Bacteriology Binding Bound Complex Double Helix Gene Expression Inhibiting Inhibition Microbiology Nucleic Acid Proteomics Regulate Regulating Regulation Repressing Repression Transcription Factor Biochemical Biochemistry Cutouts Deoxyribonucleic Acid Genetics Microbiological Molecular Molecular Model Protein
EDITORS COMMENTS
This print showcases the intricate molecular model of the Tryptophan repressor bound to DNA, offering a glimpse into the fascinating world of genetic regulation. In this artwork, we witness the purple and green hues representing the trp repressor protein elegantly intertwining with pink and beige strands symbolizing DNA molecules. The significance of this complex lies in its ability to control gene expression within Escherichia coli bacteria. Acting as a transcription factor, the trp repressor plays a crucial role in inhibiting genes responsible for coding tryptophan amino acids - an essential component for bacterial survival. When an ample supply of tryptophan is present in their environment, this protein binds tightly to the trp operon on DNA, effectively suppressing gene expression. However, when cellular levels of tryptophan decline, depicted by its absence from our visual narrative, the repressor dissociates from its binding site on DNA. This detachment triggers a cascade of events that enable E. coli bacteria to produce their own tryptophan. Through this stunning illustration against a white background, we gain insight into how nature's regulatory mechanisms operate at a molecular level. The double helix structure represents deoxyribonucleic acid (DNA), while colorful proteins highlight key interactions involved in genetic repression. Overall, this visually striking artwork captures both scientific complexity and artistic beauty simultaneously—showcasing biology's remarkable capacity for self-regulation and adaptation within microbial systems.
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