Biomaterial Database

Prevention of NH2-terminal acetylation of proteins synthesized in cell-free systems. 1977

R D Palmiter

The NH2 terminus of ovalbumin is acetylated in cell-free protein-synthesizing systems as it is in vivo. The acetyl group is derived from acetyl-CoA and it is incorporated during translation. Acetylation can be prevented by metabolizing the available acetyl-CoA to citrate with the addition of citrate synthase and oxalacetate to the translation system. The NH2 terminus of ovalbumin synthesized under these conditions can be sequenced by automated Edman degradation. This procedure has also been applied to the sequencing of Pr 76gag, the viral core protein precursor synthesized from 35 S Rous sarcoma virus RNA.

UI	MeSH Term	Description	Entries
D010047	Ovalbumin	An albumin obtained from the white of eggs. It is a member of the serpin superfamily.	Serpin B14
D010071	Oxaloacetates	Derivatives of OXALOACETIC ACID. Included under this heading are a broad variety of acid forms, salts, esters, and amides that include a 2-keto-1,4-carboxy aliphatic structure.	Ketosuccinates,Oxosuccinates,Oxaloacetic Acids
D002474	Cell-Free System	A fractionated cell extract that maintains a biological function. A subcellular fraction isolated by ultracentrifugation or other separation techniques must first be isolated so that a process can be studied free from all of the complex side reactions that occur in a cell. The cell-free system is therefore widely used in cell biology. (From Alberts et al., Molecular Biology of the Cell, 2d ed, p166)	Cellfree System,Cell Free System,Cell-Free Systems,Cellfree Systems,System, Cell-Free,System, Cellfree,Systems, Cell-Free,Systems, Cellfree
D002625	Chemistry, Organic	The study of the structure, preparation, properties, and reactions of carbon compounds. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)	Organic Chemistry
D002950	Citrate (si)-Synthase	Enzyme that catalyzes the first step of the tricarboxylic acid cycle (CITRIC ACID CYCLE). It catalyzes the reaction of oxaloacetate and acetyl CoA to form citrate and coenzyme A. This enzyme was formerly listed as EC 4.1.3.7.	Citrate Synthase,Synthase, Citrate
D000105	Acetyl Coenzyme A	Acetyl CoA participates in the biosynthesis of fatty acids and sterols, in the oxidation of fatty acids and in the metabolism of many amino acids. It also acts as a biological acetylating agent.	Acetyl CoA,Acetyl-CoA,CoA, Acetyl,Coenzyme A, Acetyl
D000107	Acetylation	Formation of an acetyl derivative. (Stedman, 25th ed)	Acetylations
D000595	Amino Acid Sequence	The order of amino acids as they occur in a polypeptide chain. This is referred to as the primary structure of proteins. It is of fundamental importance in determining PROTEIN CONFORMATION.	Protein Structure, Primary,Amino Acid Sequences,Sequence, Amino Acid,Sequences, Amino Acid,Primary Protein Structure,Primary Protein Structures,Protein Structures, Primary,Structure, Primary Protein,Structures, Primary Protein
D055601	Organic Chemistry Phenomena	The conformation, properties, reaction processes, and the properties of the reactions of organic carbon compounds.	Organic Chemistry Concepts,Organic Chemistry Processes,Organic Chemistry Phenomenon,Organic Chemistry Process,Chemistry Process, Organic,Chemistry Processes, Organic,Concept, Organic Chemistry,Concepts, Organic Chemistry,Organic Chemistry Concept,Phenomena, Organic Chemistry,Phenomenon, Organic Chemistry,Process, Organic Chemistry,Processes, Organic Chemistry