IDENTIFICATION OF FIMBRIAL ASSEMBLY GENES FROM DICHELOBACTER-NODOSUS - EVIDENCE THAT FIMP ENCODES THE TYPE-IV PREPILIN PEPTIDASE

被引:14
作者
JOHNSTON, JL [1 ]
BILLINGTON, SJ [1 ]
HARING, V [1 ]
ROOD, JI [1 ]
机构
[1] MONASH UNIV,DEPT MICROBIOL,CLAYTON,VIC 3168,AUSTRALIA
关键词
FIMBRIAE; PILI; FIMP; PSEUDOMONAS; ENDOPEPTIDASE; BIOGENESIS; GENETICS; FOOTROT; ANAEROBE; SHEEP;
D O I
10.1016/0378-1119(95)00264-7
中图分类号
Q3 [遗传学];
学科分类号
071007 ; 090102 ;
摘要
Dichelobacter nodosus (Dn) is the causative agent of footrot, an economically significant disease of sheep. One of the factors believed to be involved in the virulence of this organism is its ability to produce type-IV fimbriae, which are the major protective antigens. To investigate the process of fimbrial biogenesis in Dn, gene probes were constructed from pilus biogenesis genes of Pseudomomas aeruginosa (Pa) and used to isolate homologues from Dn. A homologue, designated fimP, of the Pa prepilin peptidase-encoding gene, piID, was cloned using this approach. The fimP gene product was shown to possess endopeptidase activity when produced in Escherichia coli. Two other fimbrial biogenesis genes fimN and fimO, whose products show similarity to the Pa PilB and PilC proteins, respectively, were identified because of their linkage to fimP. The arrangement of fimN, fimO and fimP in Dn closely resembles the arrangement of pilB, pilC and pilD in Pa.
引用
收藏
页码:21 / 26
页数:6
相关论文
共 27 条