肺炎衣原体蛋白激酶Cpn0148的克隆表达和定位

Cloning and Localization of the Ser/Thr Protein Kinase Cpn0148 from Chlamydia pneumoniae

摘要:

目前认为肺炎衣原体(Chlamydia pneumonia, Cpn)除导致呼吸道疾病外, 也是与冠心病相关的重要病原体。作为一种细胞内寄生的病原菌, Cpn激活宿主细胞信号通路, 维护其在细胞内生长代谢, 并导致疾病。肺炎衣原体基因Cpn0148可编码真核细胞样的丝/苏氨酸蛋白激酶, 利用PCR技术扩增全长Cpn0148 ORF, 将其定向插入pGEX-6p原核表达载体, 在大肠杆菌XL-1blue中表达, 测序显示Cpn0148 ORF全长1860 bp, 编码619个氨基酸, 分子量大约70 kD,

Abstract:

Chlamydia pneumonia(Cpn) is thought to be one of the important pathogens which are associated with coronary heart disease. It can induce the activation of host signaling pathways to maintain the survival and metabolism of itself in the cell, and finally leads to disease. The ORFs of Cpn0148 encoding eukaryote-like serine/threonine protein kinase was amplified from Chlamydia pneumonia serovar AR39 genomic DNA. The amplified product was cloned in pGEX-6p and expressed in XL-1blue. DNA sequencing showed that the whole ORF is about 1860 bp, encoding a protein with 619 amino acid. The molecular weight of Cpn0148 is about 70 kD. Polyclonal antibody was obtained from immune BALB/c mice with the Cpn0148-GST fusion protein, and the expressing of Cpn0148 was detected on the bacteria organism by immunoflouresence. The finding of Cpn0148 protein is very helpful foundation for further study of the host-bacteria interaction.