The Incorporation of Selenocysteine Into a Peptide; Uses a Special TRNA That Recognizes the Uga Codon As Selenocysteine Rather Than As a Termination Codon. Selenocysteine Is Synthesized From Serine Before Its Incorporation; It Is Not a Posttranslational Modification of Peptidyl Cysteine.
The Cellular Metabolic Process in Which a Protein Is Formed Using the Sequence of a Mature MRNA Molecule to Specify the Sequence of Amino Acids in a Polypeptide Chain. Translation Is Mediated by the Ribosome and Begins with the Formation of a Ternary Complex Between Aminoacylated Initiator Methionine TRNA GTP and Initiation Factor 2 Which Subsequently Associates with the Small Subunit of the Ribosome and an Mrna. Translation Ends with the Release of a Polypeptide Chain From the Ribosome.
The Chemical Reactions and Pathways Resulting in the Formation of Selenocysteinyl Trna(sec). This Process Occurs Through the Following Steps: a Unique Serine TRNA with a Uga Recognizing Anticodon Is First Aminoacylated with Serine; This Is Then Phosphorylated by Phosphoseryl Trna[ser]sec Kinase; Lastly Selenium Is Swapped For the Phosphate On the Serine.
Catalysis of a Biochemical Reaction At Physiological Temperatures. in Biologically Catalyzed Reactions the Reactants Are Known As Substrates and the Catalysts Are Naturally Occurring Macromolecular Substances Known As Enzymes. Enzymes Possess Specific Binding Sites For Substrates and Are Usually Composed Wholly or Largely of Protein But RNA That Has Catalytic Activity (ribozyme) Is Often Also Regarded As Enzymatic.
Catalysis of the Transfer of a Group E.g. a Methyl Group Glycosyl Group Acyl Group Phosphorus Containing or Other Groups From One Compound (generally Regarded As the Donor) to Another Compound (generally Regarded As the Acceptor). Transferase Is the Systematic Name For Any Enzyme of EC Class 2.