COPPER-INHIBITED NADH-DEPENDENT PEROXIDASE-ACTIVITY OF PURIFIED SOYA BEAN PLASMA-MEMBRANES

被引:16
作者
ZANCANI, M [1 ]
NAGY, G [1 ]
VIANELLO, A [1 ]
MACRI, F [1 ]
机构
[1] UNIV UDINE,DIPARTIMENTO & ECON AGROIND,SEZ BIOL VEGETALE,I-33100 UDINE,ITALY
关键词
GLYCINE MAX; LEGUMINOSAE; SOYA BEAN; PEROXIDASE; PLASMA MEMBRANE; COPPER;
D O I
10.1016/0031-9422(95)00292-F
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Highly purified soya bean plasma membranes exhibited peroxidase activity. Divalent copper strongly inhibited NADH oxidation (but not H2O2 oxidation) catalysed by this enzyme, whereas Cd2+, Ni2+ or Zn2+ had little or no effect. This inhibition did not depend on a reaction by sulphydryl groups, or on a replacement of ions in the enzyme by CU2+. The effect of Cu2+ may be explained by its scavenging capability towards O-2(-) which is produced during NADH-dependent peroxidase activity.
引用
收藏
页码:367 / 371
页数:5
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