The BirA biotin-protein ligase adds d-biotin covalently to biotin-acceptor peptides/proteins via an ATP intermediate (biotinyl 5'-adenylate) in a highly efficient and targeted manner. This kit includes 300 µg of BirA enzyme for those who require larger scale reactions or more frequent use of the BirA biotinylation reaction in their work.

碧云天研发的Avi标签蛋白生物素标记试剂盒(BirA法)(Biotin Labeling Kit for Avi-tag Protein with BirA)是一种通过生物素连接酶(BirA)对Avi标签融合蛋白或多肽快捷、高效地进行生物素标记的试剂盒。

2001年1月1日 · The enzyme BirA is a key reagent because of its ability to biotinylate proteins at a specific residue in a recognition sequence. We report a rapid, efficient, and economical method for the production, purification, and application of this enzyme. The method is easily scaled up and the protein produc …

BirA is the Escherichia coli biotin ligase that site-specifically biotinylates a lysine side chain within a 15-amino acid acceptor peptide (also known as Avi-tag). As a complementary approach to in vivo biotinylation of Avi-tag-bearing proteins, we developed a protocol for producing recombinant BirA ligase for in vitro biotinylation.

In the presence of ATP, BirA activates biotin to form the BirA-biotinyl-5'-adenylate (BirA-bio-5'-AMP or holoBirA) complex. HoloBirA can either transfer the biotinyl moiety to the biotin carboxyl carrier protein (BCCP) subunit of acetyl-CoA carboxylase, or bind to the biotin operator site and inhibit transcription of the operon.

Transcription of the Escherichia coli biotin (bio) operon is directly regulated by the biotin protein ligase BirA, the enzyme that covalently attaches biotin to its cognate acceptor proteins. Binding of BirA to the bio operator requires dimerization of the protein

Enzymatic Biotinylation: BirA. Ligation of biotin to a protein is a specific post-translational modification catalyzed by biotin ligase enzymes. The best characterized and most commonly used biotin ligase is protein BirA [P06709] from E. coli strain K12, which in bacteria also acts as the repressor of the biotin operon [1-3].

BirA is the Escherichia coli biotin ligase that site-specifically biotinylates a lysine side chain within a 15-amino acid acceptor peptide (also known as Avi-tag). As a complementary approach to in vivo biotinylation of Avi-tag-bearing proteins, we developed a protocol for producing recombinant BirA ligase for in vitro biotinylation.

生物素连接酶(BiotinLigase、BirA、EC6.3.4.15)能活化生物素形成生物素酰-5'-腺苷酸，将生物素特异地转 移到生物素受体蛋白（如AviTag融合蛋白）上，使蛋白生物素化。

生物素连接酶(Biotin Ligase,BirA)是大肠杆菌BirA基因编码的双功能蛋白质,能识别蛋白质分子的特异性序列(BirA Substrate Peptide),使蛋白质生物素化。 该酶带有6his标签，剪切反应完毕后可通过Ni-NTA去除。