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一般說明
唾液酸转移酶属于糖基转移酶家族，具有催化N-乙酰神经氨酸残基转移的能力。 它是一种具有α--2,3-唾液酸转移酶活性、α-2,6-唾液酸转移酶活性、唾液酸酶活性和反式唾液酸酶活性的多功能酶。 它的分子量大小为46.4 kDa，而pI和pH分别为5.94和7.5-8.5。
生化／生理作用
唾液酸转移酶可将Neu5Ac从CMP-Neu5Ac作为一种供体底物转移至包括糖蛋白、糖脂和寡糖在内的受体分子的β-D-半乳糖基-1,4-N-乙酰基-D-氨基葡萄糖末端。
唾液酸转移酶可将Neu5Ac从CMP-Neu5Ac转移至受体分子（包括糖蛋白、糖脂和寡糖）的半乳糖基末端。
單位定義
在37 °C pH 8.0条件下，一单位将会在没分钟内催化1.0 μmol Neu-5-Ac-α-2,3LacMU从CMP-Neu-5-Ac和Lac-β−OMU的形成。
外觀
含有Tris-HCl和NaCl的冻干粉
準備報告
以0.1毫升至1毫升体积范围内的水调配冻干粉，可以得到1单位/毫升（1毫升水）至10单位/毫升（0.1毫升水）范围的浓度。
分析報告
酶活性检测是在37°C条件下含有CMP-Neu-5Ac (1 mM)以及Lac-β−OMU (1 mM) 的Tris-HCl缓冲液(100 mM, pH 8.0)中反应30 min并通过使用带有荧光检测器（325 nm 激发而372 nm 发射）的HPLC而进行的。
訊號詞
Danger
危險聲明
危險分類
Resp. Sens. 1
儲存類別代碼
11 - Combustible Solids
水污染物質分類（WGK）
WGK 3
閃點（°F）
Not applicable
閃點（°C）
Not applicable
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Glycosyltransferases were initially considered to be specific for a single glycosyl donor and acceptor, which led to the one enzyme-one linkage concept. Subsequent observations have refuted the theory of absolute enzymatic specificity by describing the transfer of analogs of some nucleoside mono- or diphosphate sugar donors.
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