Designed Streptococcus pyogenes Sortase A Accepts Branched Amines as Nucleophiles in Sortagging.

Designed Streptococcus pyogenes Sortase A Accepts Branched Amines as Nucleophiles in Sortagging.
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设计的化脓性链球菌分选酶 A 在分选中接受支链胺作为亲核试剂。

DOI:
10.1021/acs.bioconjchem.0c00486
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发表时间:
2020
影响因子:
4.7
通讯作者:
U. Schwaneberg
U. Schwaneberg
中科院分区:
化学2区
文献类型:
--
作者:
Zhi Zou;Maximilian Nöth;Felix Jakob;U. Schwaneberg

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sortase介导的结扎(sortagging)通常使用严格识别n端甘氨酸残基的金黄色葡萄球菌sortase A (SaSrtA)进行。为了提高化脓性链球菌对不同n端氨基酸残基的转肽酶活性,设计了合理的化脓性链球菌分选酶a (SpSrtA)。生成的变体SpSrtA M3 (E189H/V206I/E215A)的催化效率提高了6.6倍(与SpSrtA野生型相比)。此外,M3与野生型亲本一样,对n端丙氨酸、甘氨酸、丝氨酸残基以及支链(α-碳)伯胺具有特异性。此外,M3应用于蛋白质的从头到尾的主链环化。
Sortase-mediated ligation (sortagging) is commonly performed using the Staphylococcus aureus sortase A (SaSrtA) that strictly recognizes the N-terminal glycine residue. In this work, a rational design of Streptococcus pyogenes sortase A (SpSrtA) for improved transpeptidase activity toward different N-terminal amino acid residues was conducted. The generated variant SpSrtA M3 (E189H/V206I/E215A) showed up to 6.6-fold (vs SpSrtA wild-type) enhanced catalytic efficiency. Additionally, M3 retains the specificity toward N-terminal alanine, glycine, serine residues, as well as branched (at α-carbon) primary amines as wild-type parent. Furthermore, M3 was applied for head-to-tail backbone cyclization of proteins.
DOI: 10.1039/c1cc13322e
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期刊: Chemical communications (Cambridge, England)
影响因子: --
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