A METHOD FOR THE DETERMINATION OF CHANGES OF GLYCOLYTIC METABOLITES IN YEAST ON A SUBSECOND TIME SCALE USING EXTRACTION AT NEUTRAL PH

被引:361
作者
DEKONING, W [1 ]
VANDAM, K [1 ]
机构
[1] UNIV AMSTERDAM,CTR BIOTECHNOL,EC SLATER INST BIOCHEM RES,PLANTAGE MUIDERGRACHT 12,1018 TV AMSTERDAM,NETHERLANDS
关键词
D O I
10.1016/0003-2697(92)90149-2
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
Glucose metabolism in yeast can be stopped within 0.1 s by spraying the cells in 60% methanol at -40°C. With this procedure the integrity of the cells is not damaged. Using stopped-flow equipment for the incubation with glucose, major changes within a second are shown to occur in intracellular glucose-6-phosphate whereas the fructose-1,6-bisphosphate concentration remains constant. After quenching, the cells can be separated from the medium, washed with cold methanol when required, and extracted using chloroform at -40°C at neutral pH, ensuring minimal degradation of labile metabolites. With partly automated enzymatic methods, a large variety of metabolites, including all glycolytic intermediates, can be determined in the neutral extracts. During the first second after addition of glucose, a significant increase in free intracellular glucose is found. © 1992.
引用
收藏
页码:118 / 123
页数:6
相关论文
共 7 条
[1]   PRACTICAL RAPID QUENCHING INSTRUMENT FOR STUDY OF REACTION-MECHANISMS BY ELECTRON-PARAMAGNETIC RESONANCE SPECTROSCOPY [J].
BALLOU, DP ;
PALMER, GA .
ANALYTICAL CHEMISTRY, 1974, 46 (09) :1248-1253
[2]   LINEAR ONE-STEP ASSAY FOR THE DETERMINATION OF ORTHO-PHOSPHATE [J].
BENCINI, DA ;
WILD, JR ;
ODONOVAN, GA .
ANALYTICAL BIOCHEMISTRY, 1983, 132 (02) :254-258
[3]  
BERGMEYER HU, 1985, METHODS ENZYMATIC AN, V6
[4]  
BERGMEYER HU, 1985, METHODS ENZYMATIC AN, V7
[5]  
BRAY R. C., 1964, P195
[6]  
LOWRY OH, 1951, J BIOL CHEM, V193, P265
[7]   DETERMINATION OF INTERMEDIARY METABOLITES IN YEAST - CRITICAL-EXAMINATION OF EFFECT OF SAMPLING CONDITIONS AND RECOMMENDATIONS FOR OBTAINING TRUE LEVELS [J].
SAEZ, MJ ;
LAGUNAS, R .
MOLECULAR AND CELLULAR BIOCHEMISTRY, 1976, 13 (02) :73-78