» Articles » PMID: 6615476

Multiple Chromatographic Forms of ATP Citrate Lyase from Rat Liver

Overview
Journal Biochem J
Specialty Biochemistry
Date 1983 Aug 15
PMID 6615476
Citations 1
Authors
Affiliations
Soon will be listed here.
Abstract

ATP citrate lyase is shown to exist as multiple forms in extracts of rat liver. DEAE-Sephadex ion-exchange chromatography of liver supernatants reveals two peaks of activity. A minor, basic, component, comprising 14% of the recovered activity, is eluted without retention, whereas the major, acidic, form is eluted by a KCl gradient. Gel filtration of similar extracts shows the presence of a high-Mr form of ATP citrate lyase (Mr around 10(7) in addition to the tetrameric enzyme (Mr 4.1 X 10(5). This associated state, which represents 10% of the total activity, is unstable, breaking down to the tetramer, and appears to be disrupted by Mg2+. The basic form changes in the partially purified state to give the acidic form. Most of the high-Mr enzyme is acidic in nature. No evidence could be found for an association of the enzyme with mitochondrial or microsomal membranes. ATP citrate lyase from rat brain also shows two peaks of activity on DEAE-Sephadex ion-exchange chromatography, but the activity is distributed between the peaks in almost equal proportions. However, only the tetrameric enzyme was observed on gel filtration.

Citing Articles

CCAAT/enhancer-binding protein beta deletion reduces adiposity, hepatic steatosis, and diabetes in Lepr(db/db) mice.

Schroeder-Gloeckler J, Rahman S, Janssen R, Qiao L, Shao J, Roper M J Biol Chem. 2007; 282(21):15717-29.

PMID: 17387171 PMC: 4109269. DOI: 10.1074/jbc.M701329200.

References
1.
Sottocasa G, Kuylenstierna B, Ernster L, Bergstrand A . An electron-transport system associated with the outer membrane of liver mitochondria. A biochemical and morphological study. J Cell Biol. 1967; 32(2):415-38. PMC: 2107253. DOI: 10.1083/jcb.32.2.415. View

2.
SRERE P . The citrate cleavage enzyme. I. Distribution and purification. J Biol Chem. 1959; 234:2544-7. View

3.
Rose I, WARMS J . Mitochondrial hexokinase. Release, rebinding, and location. J Biol Chem. 1967; 242(7):1635-45. View

4.
Suzuki F, Fukunishi K, Daikuhara Y, Takeda Y . Studies on ATP citrate lyase of rat liver. II. Immunochemical properties. J Biochem. 1967; 62(2):170-8. DOI: 10.1093/oxfordjournals.jbchem.a128645. View

5.
Daikuhara Y, Tsunemi T, Takeda Y . The role of ATP citrate lyase in the transfer of acetyl groups in rat liver. Biochim Biophys Acta. 1968; 158(1):51-61. DOI: 10.1016/0304-4165(68)90071-8. View