"Nonspecific" cholinesterase and acetylcholinesterase in rat tissues: molecular forms, structural and catalytic properties, and significance of the two enzyme systems.
AUTOR(ES)
Vigny, M
RESUMO
"Nonspecific" cholinesterase (acylcholine acylhydrolase; EC 3.1.1.8) from various rat tissues has been found to exist in several stable molecular forms that appear as exact counterparts of molecular forms of acetylcholinesterase (acetylcholine hydrolase; EC 3.1.1.7). The sedimentation pattern of cholinesterase was similar to that of acetylcholinesterase with a small but significant shift between the sedimentation coefficients of the corresponding forms. Extraction yields in different media also demonstrated a close parallelism between the two enzyme systems. Other properties, such as thermal stability and catalytic characteristics, indicated both differences and similarities. In spite of the structural resemblance implied by their physicochemical properties, cholinesterase did not crossreact with antibodies against acetylcholinesterase. The nature of the relationships revealed by these studies and their bearing on the physiological significance of cholinesterases are discussed.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=392607Documentos Relacionados
- Antigenic and structural differences in the catalytic subunits of the molecular forms of acetylcholinesterase.
- Interrelationships between ganglionic acetylcholinesterase and nonspecific cholinesterase of the cat and rat.
- Structural differences in the catalytic subunits of acetylcholinesterase forms from the electric organ of Torpedo marmorata.
- Rat acid phosphatase: overexpression of active, secreted enzyme by recombinant baculovirus-infected insect cells, molecular properties, and crystallization.
- Cholinesterases from Plant Tissues: I. Purification and Characterization of a Cholinesterase from Mung Bean Roots 1