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Translation and Protein Synthesis

Translation and protein synthesis are essential processes in all living organisms, enabling cells to convert genetic information into functional proteins. This process begins with messenger RNA (mRNA), which carries the genetic code from DNA in the nucleus to the ribosomes in the cytoplasm. At the ribosomes, the mRNA is read, and transfer RNA (tRNA) brings the correct amino acids to build the protein. This intricate system ensures that the instructions encoded in DNA are accurately translated into the proteins that perform vital functions in the body. Understanding translation and protein synthesis is crucial because it reveals how genetic information is expressed and how errors in this process can lead to diseases. It also provides insights into the development of medical treatments and therapies that target protein production.

Figures (10)

King Charles V the Wise commissions a translation of Aristotle. First square shows his ordering the translation; second square, the translation being made. Third and fourth squares show the finished translation being brought to, and then presented to, the King.
The Rosetta Stone, a symbol of the art of translation[4]
Buddhist Diamond Sutra, translated into Chinese by Kumārajīva – world's oldest known dated printed book (868 CE)
Perry Link
Qur'an in tawqi, with Persian translation (smaller words) in naskh (14th century)
Muhammad Abduh
Dryden
Schleiermacher
Joseph Conrad
Hernán Cortés and La Malinche (right) meet Moctezuma II in Tenochtitlan, 8 November 1519.

This happens at structures called ribosomes. The ribosome reads the mRNA code and matches it with the correct amino acids, which are the building blocks of proteins. As the ribosome moves along the mRNA, it links the amino acids together to form a protein.

This process is essential because proteins carry out most of the functions in a cell, from building structures to controlling chemical reactions. Errors in translation can lead to faulty proteins, which may cause diseases. Understanding translation helps scientists study how genetic instructions are used and how to correct mistakes in protein production.

The key terms to remember are ribosome, mRNA, tRNA, and amino acids. To picture it, imagine the ribosome as a factory that reads a recipe (mRNA) and uses workers (tRNA) to bring in ingredients (amino acids) to make a final product (protein).

Key Points

  • Translation is the process in which the ribosome reads the mRNA sequence and helps recognize and recruit the correct amino acid-carrying transfer RNA to match the mRNA code, linking each additional amino acid into a growing protein chain.
  • Protein synthesis is the process of making proteins from the information coded in DNA, involving two major steps: transcription, where DNA is copied into RNA, and translation, where the RNA information is read and amino acids are assembled into proteins.
  • A ribosome is a large and intricate structure in the cell that performs the key job of translating the genetic code by reading the mRNA sequence and assembling amino acids into proteins.
  • Messenger RNA (mRNA) is the RNA copy of a gene's message that delivers the gene's information to the protein-producing machinery, specifically the ribosomes, where it is translated into a protein.
  • Transfer RNA (tRNA) carries amino acids to the ribosomes, where they are matched to the mRNA code during the process of translation to build proteins.

Terms

Tap a term for a plain-language explanation.

Sources & licensing(4)