Evidence for Formation of a Rabbit Liver Aldolase--rabbit Liver Fructose-1,6-bisphosphatase Complex
Overview
Affiliations
The ability of rabbit liver aldolase (D-fructose-1,6-bisphosphate D-glyceraldehyde-3-phosphatate-lyase, EC 4.1.2.13) and rabbit liver fructose-1,6-bisphosphatase (Fru-P2ase; D-fructose-1,6-bisphosphate 1-phosphohydrolase, EC 3.1.3.11) to partition into the gel phase of Ultrogel AcA 34 is decreased in a mixture of the two enzymes. Titration experiments indicate that a 1:1 complex is formed. The value for the distribution coefficient of the complex corresponds to a molecular mass of 300,000 daltons, the value expected for a dimer containing one mole of each enzyme protein. Complex formation was not observed when either liver enzyme was replaced by the corresponding isozyme from rabbit muscle. The susceptibility of liver Fru-P2ase to limited proteolysis by subtilisin was reduced in the presence of liver aldolase, but not when the latter was replaced by muscle aldolase, suggesting that the conformation of Fru-P2ase is altered in the complex. Limited proteolysis of liver aldolase abolishes its ability both to form the heterodimer and to protect Fru-P2ase from modification by subtilisin.
Averna M, De Tullio R, Pedrazzi M, Bavestrello M, Pellegrini M, Salamino F PLoS One. 2015; 10(1):e0116738.
PMID: 25575026 PMC: 4289065. DOI: 10.1371/journal.pone.0116738.
Roychowdhury A, Kundu A, Gujar A, Bose M, Das A Acta Crystallogr F Struct Biol Commun. 2014; 70(Pt 1):53-6.
PMID: 24419617 PMC: 3943096. DOI: 10.1107/S2053230X13031476.
Roychowdhury A, Mukherjee S, Das A Acta Crystallogr Sect F Struct Biol Cryst Commun. 2011; 67(Pt 6):668-71.
PMID: 21636907 PMC: 3107138. DOI: 10.1107/S1744309111007391.
Anderson L, Gatla N, Carol A Photosynth Res. 2005; 83(3):317-28.
PMID: 16143921 DOI: 10.1007/s11120-005-0790-2.
Cox T, ODonnell M, Camilleri M, Burghes A J Clin Invest. 1983; 72(1):201-13.
PMID: 6348085 PMC: 1129175. DOI: 10.1172/jci110958.