核黃素激酶
核黃素激酶(英語:riboflavin kinase,EC 2.7.1.26)是一個催化以下化學反應的酶:
riboflavin kinase 核黃素激酶 | |||||||
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Thermoplasma acidophilum中的核黃素激酶晶體結構[1] | |||||||
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識別碼 | |||||||
EC編號 | 2.7.1.26 | ||||||
CAS號 | 9032-82-0 | ||||||
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 | ||||||
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Riboflavin kinase 核黃素激酶 | |||||||||
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![]() crystal structure of flavin binding to fad synthetase from thermotoga maritina | |||||||||
鑑定 | |||||||||
標誌 | Flavokinase | ||||||||
Pfam | PF01687(舊版) | ||||||||
InterPro | IPR015865 | ||||||||
SCOP | 1mrz / SUPFAM | ||||||||
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Riboflavin kinase 核黃素激酶 | |||||||||||
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鑑定 | |||||||||||
標誌 | Riboflavin_kinase | ||||||||||
Pfam | PF01687(舊版) | ||||||||||
InterPro | IPR015865 | ||||||||||
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- ATP + 核黃素 ADP + FMN
該酶催化的反應的底物為ATP和核黃素,產物是ADP和黃素單核苷酸(FMN)。
但是,在古菌核黃素激酶(EC 2.7.1.161)中,常使用CTP而非ATP作為反應底物,催化如下反應:
- CTP + 核黃素 CDP + FMN [2]
核黃素激酶也在許多細菌中發現,具有類似的功能,但存在若干數量的氨基酸不同。
反應
編輯結構
編輯截止2007年底,這類酶中已有14個三級結構被解決,在PDB的登陸代碼為1N05,1N06,1N07,1N08,1NB0,1NB9,1P4M,1Q9S,2P3M,2VBS,2VBT,3CTA,2VBU,2VBV。
參考文獻
編輯- ^ PDB 3CTA; Bonanno, J.B., Rutter, M., Bain, K.T., Mendoza, M., Romero, R., Smith, D., Wasserman, S., Sauder, J.M., Burley, S.K., Almo, S.C. Crystal structure of riboflavin kinase from Thermoplasma acidophilum. 2008.
- ^ Ammelburg M, Hartmann MD, Djuranovic S, Alva V, Koretke KK, Martin J, Sauer G, Truffault V, Zeth K, Lupas AN, Coles M. A CTP-Dependent Archaeal Riboflavin Kinase Forms a Bridge in the Evolution of Cradle-Loop Barrels. Structure. 2007, 12 (12): 1577–90 [2014-01-30]. PMID 18073108. doi:10.1016/j.str.2007.09.027. (原始內容存檔於2016-12-27).
延伸閱讀
編輯- CHASSY BM, ARSENIS C, MCCORMICK DB. THE EFFECT OF THE LENGTH OF THE SIDE CHAIN OF FLAVINS ON REACTIVITY WITH FLAVOKINASE. J. Biol. Chem. 1965, 240: 1338–40. PMID 14284745.
- GIRI KV, KRISHNASWAMY PR, RAO NA. Studies on plant flavokinase. Biochem. J. 1958, 70 (1): 66–71. PMC 1196627 . PMID 13584303.
- KEARNEY EB. The interaction of yeast flavokinase with riboflavin analogues. J. Biol. Chem. 1952, 194 (2): 747–54. PMID 14927668.
- McCormick DB and Butler RC. Substrate specificity of liver flavokinase. Biochim. Biophys. Acta. 1962, 65 (2): 326–332. doi:10.1016/0006-3002(62)91051-X.
- Sandoval FJ, Roje S. An FMN hydrolase is fused to a riboflavin kinase homolog in plants. J. Biol. Chem. 2005, 280 (46): 38337–45. PMID 16183635. doi:10.1074/jbc.M500350200.
- Solovieva IM, Tarasov KV, Perumov DA. Main physicochemical features of monofunctional flavokinase from Bacillus subtilis. B. Mosc,. Biochemistry. (2): 177–81. PMID 12693963.
- Solovieva IM, Kreneva RA, Leak DJ, Perumov DA. The ribR gene encodes a monofunctional riboflavin kinase which is involved in regulation of the Bacillus subtilis riboflavin operon. Microbiology. Pt 1, 145: 67–73. PMID 10206712. doi:10.1099/13500872-145-1-67.