Research articleTargeted and proximity-dependent promiscuous protein biotinylation by a mutant Escherichia coli biotin protein ligase☆
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2022, Nano TodayCitation Excerpt :In the genetic synthesis approach, aminoacyl tRNA synthetases (aaRS) are used to recognize and replace specific codons (e.g., amber UAG) with an unnatural amino acid that bears the required orthogonal reactive handle [153]. Enzymatic approaches such as proximity-dependent biotinylation [154–157] and sortase A (Srt A) transpeptidation [158–161] facilely append handles necessary for multimerizing nanobodies on nanocarriers. For instance, in proximity-dependent biotinylation (Fig. 6B), enzymes such as biotin ligase (BirA) attach biotin molecules via nucleophilic interaction onto Avi-tag (GLNDIFEAQKIEWHE) bearing proteins using Mg2+ and ATP as cofactors [162].
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2022, Advances in Protein Chemistry and Structural BiologyCitation Excerpt :One such method, which is the BioID method, is developed to overcome technical problems to detect weak or transient interactions using conventional screening methods. This method is based on proximity-dependent cellular biotinylation by a promiscuous bacterial biotin ligase (E. coli BirA R118G, shortly called BioID) (Choi-Rhee, Schulman, & Cronan, 2004; Cronan, 2005) which is fused to a bait protein to biotinylate the proteins in close proximity in living cells (Roux, Kim, Raida, & Burke, 2012). Therefore, in contrast to conventional approaches, BioID method is one of the most suitable way to label interactions in the most native environment.
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This paper was presented at the international symposium “Vitamins as Regulators of Genetic Expression: Biotin as a Model” NAFTA Satellite Meeting to the XXV National Congress of Biochemistry held on December 3–4, 2004, in Ixtapa, Zihuatanejo, Mexico. This meeting was sponsored by Sociedad Mexicana de Bioquimica A.C.; Programa de Doctorado en Ciencias Biomedicas, Universidad Nacional Autonoma de Mexico; Laboratorios Roche–Syntex, Mexico; and Instituto de Investigaciones Biomedicas, Universidad Nacional Autonoma de Mexico.