protein metabolism

(redirected from Amino-acid metabolism)
Also found in: Encyclopedia.

pro·tein me·tab·o·lism

decomposition and synthesis of protein in the tissues.
Synonym(s): proteometabolism

protein metabolism

the processes whereby protein foods are used by the body to make tissue proteins, together with the processes of breakdown of tissue proteins in the production of energy. Food proteins are first broken down into amino acids, then absorbed into the bloodstream, and finally used in body cells to form new proteins. Amino acids in excess of the body's needs may be converted by liver enzymes into keto acids and urea. The keto acids may be used as sources of energy via the citric acid cycle, or they may be converted into glucose or fat for storage. Urea is excreted in urine and sweat. Growth hormone, insulin, and androgens stimulate protein formation, and adrenal cortical hormones tend to cause breakdown of body proteins. Diseases affecting protein metabolism include homocystinuria, liver disease, maple sugar urine disease, and phenylketonuria.

pro·tein me·ta·bo·lism

(prō'tēn mĕ-tab'ŏ-lizm)
Decomposition and synthesis of protein in the tissues.

pro·tein me·ta·bo·lism

(prō'tēn mĕ-tab'ŏ-lizm)
Decomposition and synthesis of protein in tissues.
References in periodicals archive ?
Others were involved in immune responses, including the inflammatory response, immune cell signalling, and antimicrobial responses, while further gene categories include amino-acid metabolism, protein modification and antioxidant activities.
FH is a "housekeeping" gene coding for an enzyme that plays an active role in energy production and amino-acid metabolism.
Our study also demonstrated that a 2000-m race could initiate fatty and amino-acid metabolisms in highly trained subjects.