Fluorescent sensors of siderophores produced by bacterial pathogens.
Fluorescent sensors of siderophores produced by bacterial pathogens.
复制标题
细菌病原体产生的铁载体的荧光传感器。
DOI:
10.1016/j.jbc.2022.101651
复制
发表时间:
2022-03
期刊:
影响因子:
--
通讯作者:
Klebba PE
中科院分区:
文献类型:
--
作者:
Kumar A;Yang T;Chakravorty S;Majumdar A;Nairn BL;Six DA;Marcondes Dos Santos N;Price SL;Lawrenz MB;Actis LA;Marques M;Russo TA;Newton SM;Klebba PE
Siderophores are iron-chelating molecules that solubilize Fe3+ for microbial utilization and facilitate colonization or infection of eukaryotes by liberating host iron for bacterial uptake. By fluorescently labeling membrane receptors and binding proteins, we created 20 sensors that detect, discriminate, and quantify apo- and ferric siderophores. The sensor proteins originated from TonB-dependent ligand-gated porins (LGPs) of Escherichia coli (Fiu, FepA, Cir, FhuA, IutA, BtuB), Klebsiella pneumoniae (IroN, FepA, FyuA), Acinetobacter baumannii (PiuA, FepA, PirA, BauA), Pseudomonas aeruginosa (FepA, FpvA), and Caulobacter crescentus (HutA) from a periplasmic E. coli binding protein (FepB) and from a human serum binding protein (siderocalin). They detected ferric catecholates (enterobactin, degraded enterobactin, glucosylated enterobactin, dihydroxybenzoate, dihydroxybenzoyl serine, cefidericol, MB-1), ferric hydroxamates (ferrichromes, aerobactin), mixed iron complexes (yersiniabactin, acinetobactin, pyoverdine), and porphyrins (hemin, vitamin B12). The sensors defined the specificities and corresponding affinities of the LGPs and binding proteins and monitored ferric siderophore and porphyrin transport by microbial pathogens. We also quantified, for the first time, broad recognition of diverse ferric complexes by some LGPs, as well as monospecificity for a single metal chelate by others. In addition to their primary ferric siderophore ligands, most LGPs bound the corresponding aposiderophore with ∼100-fold lower affinity. These sensors provide insights into ferric siderophore biosynthesis and uptake pathways in free-living, commensal, and pathogenic Gram-negative bacteria.
登录
查看更多内容
影响因子:
3.2
作者:
Annamalai, R;Jin, B;Klebba, PE
通讯作者:
Klebba, PE
影响因子:
3.5
作者:
Clifton, Matthew C.;Corrent, Colin;Strong, Roland K.
通讯作者:
Strong, Roland K.
影响因子:
3.2
作者:
ACTIS, LA;FISH, W;SANDERSLOEHR, J
通讯作者:
SANDERSLOEHR, J
影响因子:
2.8
作者:
Dorsey, CW;Tomaras, AP;Actis, LA
通讯作者:
Actis, LA
DOI:
10.1038/nsb914
发表时间:
2003-05-01
期刊:
NATURE STRUCTURAL BIOLOGY
影响因子:
--
作者:
Chimento, DP;Mohanty, AK;Wiener, MC
通讯作者:
Wiener, MC