scholarly journals RcsAB and Fur Coregulate the Iron-Acquisition System via entC in Klebsiella pneumoniae NTUH-K2044 in Response to Iron Availability

2020 ◽  
Vol 10 ◽  
Author(s):  
Lingyue Yuan ◽  
Xuan Li ◽  
Ling Du ◽  
Kewen Su ◽  
Jiaxue Zhang ◽  
...  
Keyword(s):  
Klebsiella Pneumoniae ◽  
Iron Acquisition ◽  
Acquisition System ◽  
Iron Availability ◽  
Iron Acquisition System

scholarly journals Rapid evolution of a bacterial iron acquisition system

2018 ◽  
Vol 108 (1) ◽  
pp. 90-100 ◽  
Author(s):  
Anushila Chatterjee ◽  
Mark R. O'Brian
Keyword(s):  
Iron Acquisition ◽  
Rapid Evolution ◽  
Acquisition System ◽  
Iron Acquisition System

scholarly journals Author Correction: Iron acquisition system of Sphingobium sp. strain SYK-6, a degrader of lignin-derived aromatic compounds

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Masaya Fujita ◽  
Taichi Sakumoto ◽  
Kenta Tanatani ◽  
HongYang Yu ◽  
Kosuke Mori ◽  
...  
Keyword(s):  
Aromatic Compounds ◽  
Iron Acquisition ◽  
Acquisition System ◽  
Iron Acquisition System

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

scholarly journals The mineral weathering ability of Collimonas pratensis PMB3 (1) involves a Malleobactin‐mediated iron acquisition system

2021 ◽  
Author(s):  
Laura Picard ◽  
Cédric Paris ◽  
Tiphaine Dhalleine ◽  
Emmanuelle Morin ◽  
Philippe Oger ◽  
...  
Keyword(s):  
Iron Acquisition ◽  
Mineral Weathering ◽  
Acquisition System ◽  
Iron Acquisition System

scholarly journals Transferrin binding protein B and Transferrin binding protein A 2 expand the transferrin recognition range of Histophilus somni

2019 ◽  
Author(s):  
Anastassia K. Pogoutse ◽  
Trevor F. Moraes
Keyword(s):  
Host Species ◽  
Binding Protein ◽  
Iron Acquisition ◽  
Protein A ◽  
Acquisition System ◽  
Sheep And Goats ◽  
Iron Acquisition System ◽  
Histophilus Somni ◽  
Bovine Transferrin ◽  
Protein B

AbstractThe bacterial bipartite transferrin receptor is an iron acquisition system that is required for survival by several key human and animal pathogens. It consists of the TonB-dependent transporter Transferrin binding protein A (TbpA) and the surface lipoprotein Transferrin binding protein B (TbpB). Curiously, the Tbps are only found in host specific pathogens, and are themselves host specific, meaning that they will bind to the transferrin of their host species, but not to those of other animal species. While this phenomenon has long been established, neither the steps in the evolutionary process that led to this exquisite adaptation for the host, nor the steps that could alter it, are known. We sought to gain insight into these processes by studying Tbp specificity in Histophilus somni, a major pathogen of cattle. A past study showed that whole cells of H. somni specifically bind bovine transferrin, but not transferrin from sheep and goats, two bovids whose transferrins share 93% amino acid sequence identity with bovine transferrin. To our surprise, we found that H. somni can use sheep and goat transferrins as iron sources for growth, and that HsTbpB, but not HsTbpA, has detectable affinity for sheep and goat transferrins. Furthermore, a third transferrin binding protein, HsTbpA2, also showed affinity for sheep and goat transferrins. Our results show that H. somni TbpB and TbpA2 act to broaden the host transferrin recognition range of H. somni.ImportanceHost restricted pathogens infect a single host species or a narrow range of host species. Histophilus somni, a pathogen that incurs severe economic losses for the cattle industry, infects cattle, sheep, and goats, but not other mammals. The transferrin binding proteins, TbpA and TbpB, are thought to be a key iron acquisition system in H. somni, however, surprisingly, they were also shown to be cattle transferrin-specific. In our study we find that H. somni TbpB, and another little-studied Tbp, TbpA2, bind sheep and goat transferrins as well as bovine transferrin. Our results suggest that TbpA2 may have allowed for host range expansion, and provide a mechanism for how host specificity in Tbp containing pathogens can be altered.

scholarly journals Iron acquisition system of Sphingobium sp. strain SYK-6, a degrader of lignin-derived aromatic compounds

2020 ◽  
Author(s):  
Masaya Fujita ◽  
Taichi Sakumoto ◽  
Kenta Tanatani ◽  
Hong Yang Yu ◽  
Kosuke Mori ◽  
...  
Keyword(s):  
Outer Membrane ◽  
Aromatic Compounds ◽  
Iron Uptake ◽  
Iron Acquisition ◽  
Essential Element ◽  
Acquisition System ◽  
Bacterial Degradation ◽  
Iron Acquisition System ◽  
Iron Transporter ◽  
Outer Membrane Transporters

AbstractIron, an essential element for all organisms, acts as a cofactor of enzymes in bacterial degradation of recalcitrant aromatic compounds. The bacterial family, Sphingomonadaceae comprises various degraders of recalcitrant aromatic compounds; however, little is known about their iron acquisition system. Here, we investigated the iron acquisition system in a model bacterium capable of degrading lignin-derived aromatics, Sphingobium sp. strain SYK-6. Analyses of SYK-6 mutants revealed that FiuA (SLG_34550), a TonB-dependent receptor (TBDR), was the major outer membrane iron transporter. Three other TBDRs encoded by SLG_04340, SLG_04380, and SLG_10860 also participated in iron uptake, and tonB2 (SLG_34550), one of the six tonB comprising the Ton complex which enables TBDR-mediated transport was critical for iron uptake. The ferrous iron transporter FeoB (SLG_36840) played an important role in iron uptake across the inner membrane. The promoter activities of most of the iron uptake genes were induced under iron-limited conditions, and their regulation is controlled by SLG_29410 encoding the ferric uptake regulator, Fur. Although feoB, among all the iron uptake genes identified is highly conserved in Sphingomonad strains, the outer membrane transporters seem to be diversified. Elucidation of the iron acquisition system promises better understanding of the bacterial degradation mechanisms of aromatic compounds.

scholarly journals Transferrin Binding Protein B and Transferrin Binding Protein A2 Expand the Transferrin Recognition Range of Histophilus somni

2020 ◽  
Vol 202 (14) ◽  
Author(s):  
Anastassia K. Pogoutse ◽  
Trevor F. Moraes
Keyword(s):  
Host Species ◽  
Binding Protein ◽  
Iron Acquisition ◽  
Acquisition System ◽  
Content Type ◽  
Sheep And Goats ◽  
Iron Acquisition System ◽  
Histophilus Somni ◽  
Bovine Transferrin ◽  
Protein B

ABSTRACT The bacterial bipartite transferrin receptor is an iron acquisition system that several important human and animal pathogens require for survival. It consists of the TonB-dependent transporter transferrin binding protein A (TbpA) and the surface lipoprotein transferrin binding protein B (TbpB). Curiously, the Tbps are only found in host-specific pathogens and are themselves host specific, meaning that they will bind to the transferrin of their host species but not to the transferrins of other animal species. While this phenomenon has long been established, neither the steps in the evolutionary process that led to this exquisite adaptation for the host nor the steps that could alter it are known. We sought to gain insight into these processes by studying Tbp specificity in Histophilus somni, an economically important pathogen of cattle. A past study showed that whole cells of H. somni specifically bind bovine transferrin but not transferrin from sheep and goats, two bovids whose transferrins share 93% amino acid sequence identity with bovine transferrin. To our surprise, we found that H. somni can use sheep and goat transferrins as iron sources for growth and that HsTbpB, but not HsTbpA, has detectable affinity for sheep and goat transferrins. Furthermore, a third transferrin binding protein found in H. somni, HsTbpA2, also showed affinity for sheep and goat transferrins. Our results suggest that H. somni TbpB and TbpA2 may contribute to broadening the host transferrin recognition range of H. somni. IMPORTANCE Host-restricted pathogens infect a single host species or a narrow range of host species. Histophilus somni, a pathogen that incurs severe economic losses for the cattle industry, infects cattle, sheep, and goats but not other mammals. The transferrin binding proteins, TbpA and TbpB, are thought to be a key iron acquisition system in H. somni; however, despite their importance, H. somni TbpA and TbpB were previously shown to be cattle transferrin specific. In our study, we find that H. somni TbpB and another little-studied Tbp, TbpA2, bind sheep and goat transferrins, as well as bovine transferrin. Our results suggest that TbpB and TbpA2 may allow for host range expansion and provide a mechanism for how host specificity in Tbp-encoding pathogens can be altered.

scholarly journals Kinetic analysis of ligand interaction with the gonococcal transferrin-iron acquisition system

BioMetals ◽  
2008 ◽  
Vol 22 (3) ◽  
pp. 439-451 ◽  
Author(s):  
Amanda J. DeRocco ◽  
Mary Kate Yost-Daljev ◽  
Christopher D. Kenney ◽  
Cynthia Nau Cornelissen
Keyword(s):  
Kinetic Analysis ◽  
Iron Acquisition ◽  
Acquisition System ◽  
Ligand Interaction ◽  
Iron Acquisition System

scholarly journals Novel host-specific iron acquisition system in the zoonotic pathogenVibrio vulnificus

2015 ◽  
Vol 17 (6) ◽  
pp. 2076-2089 ◽  
Author(s):  
David Pajuelo ◽  
Chung-Te Lee ◽  
Francisco J. Roig ◽  
Lien-I. Hor ◽  
Carmen Amaro
Keyword(s):  
Iron Acquisition ◽  
Acquisition System ◽  
Iron Acquisition System ◽  
Novel Host

Two distinct pathways for iron acquisition by iron-limited cyanobacterial cells: evidence from experiments using siderophores and synthetic chelators

Botany ◽  
2012 ◽  
Vol 90 (3) ◽  
pp. 181-190 ◽  
Author(s):  
Mathew B. Sonier ◽  
Daniel A. Contreras ◽  
Ron G. Treble ◽  
Harold G. Weger
Keyword(s):  
High Stability ◽  
Iron Acquisition ◽  
Acquisition System ◽  
Iron Acquisition System ◽  
Desferrioxamine B ◽  
Dependent Process ◽  
Cyanobacterium Anabaena ◽  
Independent Process

Iron-limited cyanobacterial cells are generally considered to acquire extracellular iron through a siderophore-dependent system, although evidence has started to accumulate that other, as yet poorly characterized, iron acquisition systems may also play a role. Iron-limited cells of the cyanobacterium Anabaena flos-aquae (Lyng.) Brèb. are well known to produce the relatively low Fe(III) affinity dihydroxamate siderophore schizokinen. In this set of experiments we show that iron-limited A. flos-aquae cells (i) acquired iron at substantial rates in the absence of the schizokinen and (ii) acquired iron from a bacterial siderophore (the trihydroxamate molecule desferrioxamine B (DFB)), and also a synthetic chelator (N, N-bis(2-(bis(carboxymethyl)amino)ethyl)glycine (DTPA)), with substantially higher affinities for Fe(III) than schizokinen, indicating that a schizokinen-independent iron acquisition pathway was operating. We suggest that there exists a siderophore-independent iron acquisition system that is able to acquire Fe(III) from high stability Fe(III)-chelates, which are not accessible to iron-limited cells via the schizokinen-based system. As well, we present two possible models for iron acquisition by iron-limited A. flos-aquae cells. Both of these models suggest that there are two major routes for Fe(III) entry into the periplasm of iron-limited cells: (1) the well-characterized siderophore (schizokinen) dependent process and (2) a siderophore-independent process that is able to access Fe(III) sources not biologically available to the schizokinen system.

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