異檸檬酸脱氫酶 (NADP+)

異檸檬酸脫氫酶 (NADP+)
大腸桿菌（E. coli）異檸檬酸脫氫酶(NADP+)的晶體結構（PDB 1CW7） 這種酶有三個活性位點，三分子檸檬酸中的其中一個在NADP+結合區域中。
命名 系統命名 isocitrate:NADP+ oxidoreductase (decarboxylating) 縮寫 IDP; IDP1; IDP2; IDP3; IDH（有歧義） 別名 oxalosuccinate decarboxylase; isocitrate dehydrogenase (NADP); oxalsuccinic decarboxylase; isocitrate (NADP) dehydrogenase; isocitrate (nicotinamide adenine dinucleotide phosphate) dehydrogenase; NADP-specific isocitrate dehydrogenase; NADP-linked isocitrate dehydrogenase; NADP-dependent isocitrate dehydrogenase; NADP isocitric dehydrogenase; isocitrate dehydrogenase (NADP-dependent); NADP-dependent isocitric dehydrogenase; triphosphopyridine nucleotide-linked isocitrate dehydrogenase-oxalosuccinate carboxylase; NADP+-linked isocitrate dehydrogenase; dual-cofactor-specific isocitrate dehydrogenase; NADP+-ICDH; NADP+-IDH
識別碼
EC編號	1.1.1.42
CAS號	9028-48-2
數據庫
IntEnz	IntEnz瀏覽
BRENDA	BRENDA入口
ExPASy	NiceZyme瀏覽
KEGG	KEGG入口
MetaCyc	代謝路徑
PRIAM	概述
PDB	RCSB PDB PDBj PDBe PDBsum
基因本體	AmiGO / EGO
搜索 PMC 相關文獻 PubMed 相關文獻

異檸檬酸脫氫酶 (NADP⁺)（英語：isocitrate dehydrogenase (NADP⁺)，EC 1.1.1.42 （頁面存檔備份，存於互聯網檔案館））是一種以NAD⁺或NADP⁺為受體、作用於供體CH-OH基團上的氧化還原酶。這種酶能催化以下酶促反應：

異檸檬酸 + NADP⁺ $\rightleftharpoons$ 2-酮戊二酸 + CO₂ + NADPH

異檸檬酸脫氫酶 (NADP⁺)需要Mn²⁺或Mg²⁺以維持活性。真核細胞中的異檸檬酸脫氫酶 (NAD⁺)以兩種形式存在：其中一種與NADP⁺還存在於細胞質基質中不能變構調節；另一種與NAD⁺相關聯且僅在線粒體中被發現並但可以變構調節。 這兩種酶——異檸檬酸脫氫酶 (NADP⁺)與異檸檬酸脫氫酶 (NAD⁺)並不相同，前者能以草酰琥珀酸作為底物。某些物種的異檸檬酸脫氫酶 (NADP⁺)也能利用NAD⁺，但催化的反應速率較慢。

參考文獻

• Agosin, M.U. and Weinbach, E.C. Partial purification and characterization of the isocitric dehydrogenase from ‘’Trypanosoma cruzi’’.. Biochim. Biophys. Acta. 1956, 21: 117–126. PMID 13363868 （英語）. 
• Moyle, J. and Dixon, M. Purification of the isocitrate enzyme (triphosphopyridine nucleotide-linked isocitrate dehydrogenase-oxalosuccinate carboxylase).. Biochem. J. 1956, 63: 548–552. PMID 13355848 （英語）. 
• Plaut, G.W.E. Isocitrate dehydrogenases. Lardy, H. and Myrbäck, K. (編). The Enzymes 7 2nd. New York: Academic Press. 1963: 105–126 （英語）. 
• Siebert, G., Dubuc, J., Warner, R.C. and Plaut, G.W.E. The preparation of isocitrate dehydrogenase from mammalian heart.. J. Biol. Chem. 1957, 226: 965–975. PMID 13438885 （英語）. 
• Vickery, H.B. A. suggested new nomenclature for the isomers of isocitric acid. 237. 1962: 1739–1741. PMID 13925783 （英語）. 
• Koh, H.J., Lee, S.M., Son, B.G., Lee, S.H., Ryoo, Z.Y., Chang, K.T., Park, J.W., Park, D.C., Song, B.J., Veech, R.L., Song, H. and Huh, T.L. Cytosolic NADP⁺-dependent isocitrate dehydrogenase plays a key role in lipid metabolism.. 2004: 39968–39974. PMID 15254034 （英語）. 
• Ceccarelli, C., Grodsky, N.B., Ariyaratne, N., Colman, R.F. and Bahnson, B.J. Crystal structure of porcine mitochondrial NADP⁺-dependent isocitrate dehydrogenase complexed with Mn²⁺ and isocitrate. Insights into the enzyme mechanism.. J. Biol. Chem. 277. 2002: 43454–43462. PMID 12207025 （英語）.