posttranslational modification

الإنجليزية - الإنجليزية

تعريف posttranslational modification في الإنجليزية الإنجليزية القاموس.

Any of several types of modification made to a protein subsequent to the translation phase of its biosynthesis

Post-translational modification (PTM) is the chemical modification of a protein after its translation. It is one of the later steps in protein biosynthesis for many proteins. A protein (also called a polypeptide) is a chain of amino acids. During protein synthesis, 20 different amino acids can be incorporated in proteins. After translation, the posttranslational modification of amino acids extends the range of functions of the protein by attaching to it other biochemical functional groups such as acetate, phosphate, various lipids and carbohydrates, by changing the chemical nature of an amino acid (e.g. citrullination) or by making structural changes, like the formation of disulfide bridges

الواصلة

posttranslational mo·di·fi·ca·tion