期刊
JOURNAL OF BIOLOGICAL CHEMISTRY
卷 276, 期 12, 页码 9537-9542出版社
AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC
DOI: 10.1074/jbc.M011035200
关键词
-
Clostridium botulinum C3 is the prototype of the family of the C3-like transferases that ADP-ribosylate exclusively RhoA, -B and -C, The ADP-ribose at Asn-41 results in functional inactivation of Rho reflected by disaggregation of the actin cytoskeleton. We report on a new C3-like transferase produced by a pathogenic Staphylococcus aureus strain, The transferase designated C3(Stau) was cloned from the genomic DNA, At the amino acid level, C3(Stau) revealed an identity of 35% to C3 from C. botulinum and Clostridium limosum exoenzyme, respectively, and of 78% to EDIN from S, aureus, In addition to RhoA, which is the target of the other C3-like transferases, C3(Stau) modified RhoE and Rnd3. RhoE was ADP-ribosylated at Asn-44, which is equivalent to Asn-41 of RhoA, RhoE and Rnd3 are members of the Rho subfamily, which are deficient in intrinsic GTPase activity and possess a RhoA antagonistic cell function, The protein substrate specificity found with recombinant Rho proteins was corroborated by expression of RhoE in Xenopus laevis oocytes showing that RhoE was also modified in vivo by C3(Stau) but not by C3 from C. botulinum. The poor cell accessibility of C3(Stau) was overcome by generation of a chimeric toxin recruiting the cell entry machinery of C, botulinum C2 toxin, The chimeric C3(Stau) caused the same morphological and cytoskeletal changes as the chimeric C. botulinum C3. C3(Stau) is a new member of the family of the C3-like transferases but is also the prototype of a subfamily of RhoE/Rnd modifying transferases.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据