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StarGate® Acceptor Vector pCSG-IBA144

StarGate ®受体载体pCSG-IBA144

公司名称: IBA GmbH
产品编号: 5-5144-001
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Generation of IgG-Fc Glycovariants Using Recombinant Glycosidases and Glycosyltransferases
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2016-08-05
[Abstract]  The immunoglobulin G (IgG) fragment crystallizable (Fc) domain contains a single, highly conserved asparagine 297 (N297) glycosylation site in the CH2 domain, which is buried within the hydrophobic core of each of the two heavy chains. The biantennary core glycan structure, composed of 2 N-acetylglucosamine (GlcNAc) and 3 mannose residues, can be further decorated with fucose, bisecting GlcNAc and terminal GlcNAc, galactose, and sialic acid. Presence or absence of distinct residues can alter IgG effector functions such as antibody-dependent cell-mediated cytotoxicity (ADCC) or ... [摘要]  免疫球蛋白G(IgG)片段可结晶(Fc)结构域在CH2结构域中包含单个,高度保守的天冬酰胺297(N297)糖基化位点,其掩埋在两条重链的每一条的疏水核内。由2个N-乙酰葡萄糖胺(GlcNAc)和3个甘露糖残基组成的双触角核心聚糖结构可以进一步用岩藻糖,二等分GlcNAc和末端GlcNAc,半乳糖和唾液酸装饰。不同残基的存在或不存在可以改变IgG效应子功能,例如抗体依赖性细胞介导的细胞毒性(ADCC)或补体依赖性细胞毒性(CDC)。在这里,我们提供使用重组糖苷酶和糖基转移酶产生IgG-Fc去半乳糖基化,半乳糖基化,去唾液酸化和唾液酸化IgG抗体的方案。

[背景] 糖基转移酶用于抗体聚糖修饰的用途允许将糖底物连接到预先存在的聚糖残基上。免疫球蛋白G在其每个CH2结构域中携带单个高度保守的N-糖基化位点(Arnold等人,2007)(图1),允许用糖基转移酶进行位点特异性聚糖修饰。如果抗体的Fab结构域含有Asn-X-Ser/Thr(X≠Pro)序列(Mellquist等人,1998),则抗体可携带额外的N-聚糖。因此,仔细选择缺少Fab糖基化的单克隆抗体对于Fc特异性聚糖修饰是重要的。本文所述的方案是基于以下出版物开发的(Kingston,2003; Kaneko等人,2006; Anthony等人,2008; Barb等人。,2009; Quast ...

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