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首页> 外文期刊>Journal of bacteriology >2,4-Diaminovaleric Acid: an Intermediate in the Anaerobic Oxidation of Ornithine by Clostridium sticklandii
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2,4-Diaminovaleric Acid: an Intermediate in the Anaerobic Oxidation of Ornithine by Clostridium sticklandii

机译:2,4-二氨基戊酸:棒状梭菌厌氧氧化鸟氨酸的中间体

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摘要

The oxidation of ornithine in the presence of proline by crude extracts of Clostridium sticklandii cells was stimulated by nicotinamide adenine dinucleotide, coenzyme A, α-ketoglutarate, dimethylbenzimidazolyl cobamide (DBC) coenzyme, MgCl2, and adenosine diphosphate. Deletion of various cofactors resulted in the accumulation of a new dibasic amino acid which was identified as 2,4-diaminovaleric acid. Both the oxidation of ornithine to alanine and acetate and the conversion of ornithine to 2,4-diaminovaleric acid were stimulated by addition of DBC coenzyme, and both were inhibited by intrinsic factor, an inhibitor of cobamide coenzyme-dependent reactions. This inhibition was reversed by addition of DBC coenzyme. However, the oxidation of 2,4-diaminovaleric acid was insensitive to added intrinsic factor. The data indicate that 2,4-diaminovaleric acid represents the first intermediate in the oxidation of ornithine by C. sticklandii.
机译:烟酰胺腺嘌呤二核苷酸,辅酶A,α-酮戊二酸酯,二甲基苯并咪唑基钴酰胺(DBC)辅酶,MgCl 2 < / sub>和二磷酸腺苷。各种辅因子的缺失导致新的二元氨基酸的积累,该新的二元氨基酸被确定为2,4-二氨基戊酸。添加DBC辅酶会刺激鸟氨酸氧化为丙氨酸和乙酸,以及鸟氨酸转化为2,4-二氨基戊酸,并且都被内酰胺因子抑制,内在因子是cobamide辅酶依赖性反应的抑制剂。通过添加DBC辅酶可以逆转这种抑制作用。然而,2,4-二氨基戊酸的氧化对添加的内在因子不敏感。数据表明2,4-二氨基戊酸代表鸟氨酸被 C氧化的第一中间体。 sticklandii

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