are synthesized via an indirect pathway involving side chain amidation of misacylated glutamyl-tRNAGln (Glu-tRNAGln) and/or aspartyl-tRNAAsn (Asp-tRNAAsn) by an amidotransferase. A series of chloramphenicol analogs have been synthesized and evaluated as inhibitors of Helicobacter pylori GatCAB amidotransferase. Compound 7a was identified as the most active competitive inhibitor of the transamidase activity
基因组学研究表明,在许多细菌和所有已知的古细菌中都没有谷
氨酰胺基-tRNA合成酶和/或天冬酰胺基-tRNA合成酶。在这些微
生物中,谷
氨酰胺基-tRNA Gln(Gln-tRNA Gln)和/或天冬酰胺基-tRNA Asn(Asn-tRNA Asn)是通过间接途径合成的,该间接途径涉及错误酰化的谷
氨酰-tRNA Gln(Glu-tRNA Gln)的侧链酰胺化。/或天冬
氨酰-tRNA Asn(Asp-tRNA Asn)通过酰胺基转移酶。已经合成了一系列
氯霉素类似物,并将其评估为幽门螺杆菌Gat
CAB酰胺基转移酶的
抑制剂。化合物7a相对于Asp-tRNA Asn(K m = 2μM),Ki值被确定为转
氨酶活性最活跃的竞争性
抑制剂,K i值为27μM。