AlgK is a TPR-containing protein and the periplasmic component of a novel exopolysaccharide secretin.

AlgK is a TPR-containing protein and the periplasmic component of a novel exopolysaccharide secretin.
复制标题

DOI:
10.1016/j.str.2009.11.015
复制
发表时间:
2010-02-10
期刊:
Structure (London, England : 1993)
影响因子:
--
通讯作者:
Howell PL
Howell PL
中科院分区:
其他
文献类型:
--
作者:
Keiski CL;Harwich M;Jain S;Neculai AM;Yip P;Robinson H;Whitney JC;Riley L;Burrows LL;Ohman DE;Howell PL

文献摘要

参考文献

被引文献

相似文献

条件致病菌铜绿假单胞菌引起囊性纤维化患者慢性生物膜感染。在肺的定殖期间,铜绿假单胞菌转化为粘液样表型,其特征在于过量产生胞外多糖藻酸盐。在这里,我们表明,AlgK,生产高分子量藻酸盐的蛋白质,是一种外膜脂蛋白,有助于正确定位的孔蛋白,AlgE。我们的2.5kb结构表明AlgK由9.5个类似于四肽(TPR)的重复序列组成,并且已经确定了三个蛋白质-蛋白质相互作用的推定位点。生物信息学分析表明,BcsA、PgaA和PelB分别参与纤维素、poly-β-1,6-N-Acetyl-D-glucosamine和Pel胞外多糖的产生和输出,与AlgK/E具有相同的拓扑结构。总之,我们的数据表明,AlgK在藻酸盐生物合成复合物的组装中起作用,并代表不同于典型细菌荚膜多糖分泌系统的新型外膜分泌素的周质组分。
The opportunistic pathogen Pseudomonas aeruginosa causes chronic biofilm infections in cystic fibrosis patients. During colonization of the lung, P. aeruginosa converts to a mucoid phenotype characterized by overproduction of the exopolysaccharide alginate. Here we show that AlgK, a protein essential for production of high molecular weight alginate, is an outer membrane lipoprotein that contributes to the correct localization of the porin, AlgE. Our 2.5Å structure shows AlgK is composed of 9.5 tetratricopeptide (TPR)-like repeats, and three putative sites of protein-protein interaction have been identified. Bioinformatics analysis suggests that BcsA, PgaA and PelB, involved in the production and export of cellulose, poly-β-1,6-N-Acetyl-D-glucosamine and Pel exopolysaccharide, respectively, share the same topology as AlgK/E. Together, our data suggest that AlgK plays a role in the assembly of the alginate biosynthetic complex and represents the periplasmic component of a new type of outer membrane secretin that differs from canonical bacterial capsular polysaccharide secretion systems.
DOI: 10.1107/s0907444904019158
发表时间: 2004-12-01
影响因子: 2.2
作者:
Emsley, P;Cowtan, K
通讯作者: Cowtan, K
DOI: 10.1093/nar/gkh417
发表时间: 2004-07-01
影响因子: 14.9
作者:
Bagos, PG;Liakopoulos, TD;Hamodrakas, SJ
通讯作者: Hamodrakas, SJ
DOI: 10.1128/jb.136.1.381-390.1978
发表时间: 1978-01-01
影响因子: 3.2
作者:
HANCOCK, REW;NIKAIDO, H
通讯作者: NIKAIDO, H
DOI: 10.1093/nar/gkm216
发表时间: 2007-07
影响因子: 14.9
作者:
Davis IW;Leaver-Fay A;Chen VB;Block JN;Kapral GJ;Wang X;Murray LW;Arendall WB 3rd;Snoeyink J;Richardson JS;Richardson DC
通讯作者: Richardson DC
DOI: 10.1107/s0907444998003254
发表时间: 1998-09-01
期刊: ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY
影响因子: --
作者:
Brunger, AT;Adams, PD;Warren, GL
通讯作者: Warren, GL