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单词 Molybdenum cofactor
释义

Molybdenum cofactor

英语百科

Molybdenum cofactor

Moco biosynthetic pathway in bacteria and humans. Molybdenum cofactor (Moco) biosynthesis occurs in four steps: (i) the radical-mediated cyclization of nucleotide, guanosine 5'-triphosphate (GTP), to (8S)‑3',8‐cyclo‑7,8‑dihydroguanosine 5'‑triphosphate (3',8‑cH2GTP), (ii) the formation of cyclic pyranopterin monophosphate (cPMP) from the 3',8‑cH2GTP, (iii) the conversion of cPMP into molybdopterin (MPT), (iv) the insertion of molybdate into MPT to form Moco. The human enzymes are indicated in parenthesis.
Algunos de los pasos biosintéticos que conducen a la formación de la molibdopterina.

Molybdenum cofactor (Moco) is a metal-containing prosthetic group common to nearly all molybdoenzymes and is ubiquitous to all kingdoms of life. Moco-dependent enzymes play central roles in many biologically important processes such as purine and sulfur catabolism in mammals, anaerobic respiration in bacteria, and nitrate assimilation in plants. In humans, Moco deficiency results in the pleiotropic loss of activity of enzymes such as sulfite oxidase, xanthine oxidoreductase, and aldehyde oxidase, which in turn causes neurological abnormalities and early childhood death.

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更新时间:2025/6/23 15:41:08