Viale A M, Kobayashi H, Akazawa T, Henikoff S
Departamento de Microbiologia, Facultad de Ciencias Bioquimicas y Farmaceuticas, Universidad Nacional de Rosario, Argentina.
J Bacteriol. 1991 Aug;173(16):5224-9. doi: 10.1128/jb.173.16.5224-5229.1991.
An open reading frame, rbcR, was identified 226 bp upstream of rbcAB, i.e., the ribulose 1,5-bisphosphate carboxylase genes expressed in the phototrophic purple bacterium Chromatium vinosum. Several features reveal that rbcR encodes a member of the LysR family of transcriptional regulators, in which an anomalous content of lysine and arginine residues (Lys/Arg anomaly) was found. The expression of rbcR in Escherichia coli as a protein fused to the N-terminal region of beta-galactosidase led to reduced expression of rbcAB. Thus, rbcR is likely to encode a trans-acting transcriptional regulator of rbcAB expression in C. vinosum.
在光合紫色细菌嗜硫小红卵菌(Chromatium vinosum)中表达的1,5-二磷酸核酮糖羧化酶基因rbcAB上游226 bp处鉴定出一个开放阅读框rbcR。若干特征表明rbcR编码转录调节因子LysR家族的一个成员,其中发现赖氨酸和精氨酸残基含量异常(赖氨酸/精氨酸异常)。rbcR在大肠杆菌中作为与β-半乳糖苷酶N端区域融合的蛋白表达,导致rbcAB表达降低。因此,rbcR可能编码嗜硫小红卵菌中rbcAB表达的反式作用转录调节因子。