形式
lyophilized powder
质量水平
比活
8-20 units/mg solid
分子量
71 kDa by SDS-PAGE
83 kDa by gel filtration
储存温度
−20°C
一般描述
Research area: Cell signaling. Choline oxidaseis a flavoprotein and belongs to the glucose methanol choline(GMC)-oxidoreductase family.
应用
Sigma的胆碱氧化酶用于使用具有电位检测的流动注射分析（FIA）系统对牛奶中的胆碱进行酶法测定。
来自球形节杆菌的胆碱氧化酶已被用于：
- 酶法测定胆碱（Cho）和磷酸胆碱（P-Cho）。
- 在鞘磷脂试验中通过测量游离胆碱来测定鞘磷脂的浓度
- 用于电化学测量的全组装记录设备的酶涂层
生化/生理作用
胆碱氧化酶催化胆碱到甘氨酸甜菜碱的四电子氧化反应，其中甜菜碱醛为中间体，分子氧为初级电子受体。该酶还可以甜菜碱醛作为底物。这可研究胆碱转化成醛中间体和甜菜碱醛转化成甘氨酸甜菜碱的反应机理。该酶是分子量约为83,000 Da（凝胶过滤法）或71,000 Da（SDS凝胶电泳法）的黄素蛋白。最佳pH约为pH 7.5，等电点（pI）约为pH 4.5。
单位定义
在37℃、pH 8.0条件下，一单位酶每分钟可形成1 μmM H2O2 ，同时将1 μmM胆碱氧化成甜菜碱醛。注意：在胆碱氧化酶将胆碱转化成甜菜碱过程中，每μM胆碱产生2 μmM H2O2 。
警示用语：
Danger
危险声明
预防措施声明
危险分类
Resp. Sens. 1
WGK
WGK 3
闪点(°F)
Not applicable
闪点(°C)
Not applicable
个人防护装备
Eyeshields, Gloves, type N95 (US)
法规信息
常规特殊物品
Choline import into chloroplasts limits glycine betaine synthesis in tobacco: analysis of plants engineered with a chloroplastic or a cytosolic pathway
Nuccio ML, et al.
Metabolic engineering, 2(4), 300-311 (2000)
A multi-site array for combined local electrochemistry and electrophysiology in the non-human primate brain
Disney AA, et al.
Journal of Neuroscience Methods, 255, 29-37 (2015)
Rungaroon Waditee et al.
The Journal of biological chemistry, 278(7), 4932-4942 (2002-12-06)
Glycine betaine (N,N,N-trimethylglycine) is an important osmoprotectant and is synthesized in response to abiotic stresses. Although almost all known biosynthetic pathways of betaine are two-step oxidation of choline, here we isolated two N-methyltransferase genes from a halotolerant cyanobacterium Aphanothece halophytica.
Shufen Li et al.
Plant, cell & environment, 34(11), 1931-1943 (2011-06-30)
Tomato (Lycopersicon esculentum cv. 'Moneymaker') was transformed with a codA gene, from Arthrobacter globiformis, for choline oxidase that had been modified to allow targeting to both chloroplasts and the cytosol. Glycinebetaine (GB) accumulated in seeds of transformed plants up to
Zhanxia Zhang et al.
The Analyst, 136(23), 4960-4965 (2011-10-04)
A sensitive choline biosensor using Fe(3)O(4) magnetic nanoparticles and a choline oxidase modified gold electrode was developed. Fe(3)O(4) magnetic nanoparticles as peroxidase mimics used in the choline biosensor can not only improve the sensitivity of the response signal, but also
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