INCOMPLETE TRICARBOXYLIC ACID CYCLE IN BLUE-GREEN ALGA ANABAENA VARIABILIS
INCOMPLETE TRICARBOXYLIC ACID CYCLE IN BLUE-GREEN ALGA ANABAENA VARIABILIS
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DOI：
10.1099/00221287-55-3-371
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发表时间：
1969-01-01
期刊：
影响因子：
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通讯作者：
CARR, NG
中科院分区：
文献类型：
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作者：
PEARCE, J;LEACH, CK;CARR, NG
描述了变异鱼腥藻（Anabaena varia-bilisandAnacystis nidulamis）中不完全三羧酸循环的存在。这些蓝绿藻缺乏α-酮戊二酸脱氢酶和琥珀酰辅酶A合成酶。琥珀酰辅酶A在A.通过使用乙酰乙酰辅酶A作为辅酶A供体的3-酮酰基辅酶A-转移酶的可变性。其他三羧酸循环酶的活动进行了测量，在提取物中制备的自养生物和那些生长在乙酸盐的存在下。未观察到指示酶阻遏或去阻遏的活性变化。这些结果进行了讨论有关的自养行为的可能原因。
The presence of an incomplete tricarboxylic acid cycle inAnabaena varia-bilisandAnacystis nidulamis described. These blue-green algae lack bothα-oxoglutarate dehydrogenase and succinyl-CoA synthetase. Succinyl-CoA was formed in extracts ofA. variabilisby 3-ketoacyl CoA-transferase using acetoacetyl-CoA as CoA donor. The activities of the other tricarboxylic cycle enzymes were measured in extracts prepared from autotrophic organisms and from those grown in the presence of acetate. No alterations in activity indicative of enzyme repression or de-repression were observed. These results are discussed in relation to possible reasons for autotrophic behaviour.