Prevalence and Specificity of Chemoreceptor Profiles in Plant-Associated Bacteria

Abstract

Considering the enormous variety of LBDs at sensor proteins, an important question resides in establishing the forces that have driven their evolution and selection. We present here the first clear demonstration that environmental factors play an important role in the selection and evolution of LBDs.

Chemotaxis of the Human Pathogen Pseudomonas aeruginosa to the Neurotransmitter Acetylcholine

“…For example, Helicobacter pylori infects the gastric epithelium and is adapted to a highly specific niche. This species has 4 chemoreceptors, which is a number significantly below the bacterial average of 14 ( 1 ). Analysis of H. pylori chemoreceptor function has revealed a specialized spectrum of chemoeffectors that is closely linked to establishing an infection in the stomach.…”

“…Chemotaxis allows bacteria to move in chemical concentration gradients and facilitates the colonization of more-favorable ecological niches. Genome analyses indicate that about half of known bacterial species possess genes required for chemotaxis ( 1 ). The molecular machinery for chemotaxis is highly complex and is among the best-studied bacterial signal transduction systems.…”

“…Furthermore, PctA and TlpQ were found to bind and mediate chemoattraction to the autoinducer-2 quorum sensing signal ( 48 ). The dCache domain is the predominant extracellular LBD in bacterial signal transduction systems, and it is present in about 15% of all chemoreceptors ( 1 , 49 ). P. aeruginosa has five chemoreceptors that contain dCache LBDs, four of which—PctA, PctB, PctC, and TlpQ—have been functionally annotated ( 35 ).…”

Pseudomonas syringae pv. tomato infection of tomato plants is mediated by GABA and l‐Pro chemoperception

“…In phytopathogenic bacteria, the importance of chemotaxis for efficient plant infection is supported by abundant experimental evidence (Antúnez‐Lamas, Cabrera‐Ordonez, et al, 2009; Antúnez‐Lamas, Cabrera, et al, 2009; Cerna‐Vargas et al, 2019; Hawes & Smith, 1989; Hida et al, 2015; Kumar Verma et al, 2018; Malamud et al, 2011; Matas et al, 2012; Santamaría‐Hernando et al, 2020; Tumewu et al, 2020; Yao & Allen, 2006, 2007). The relevance of chemotaxis is also reflected by the fact that about 90% of phytopathogenic bacteria possess chemosensory genes (Ortega, Zhulin, et al, 2017), whereas such genes are only found in 47% of total bacteria (Sanchis‐López et al, 2021). In addition, phytopathogenic bacteria harbour on average 27 chemoreceptor genes (Lacal et al, 2010), a number that is well above the bacterial average of 13 (Sanchis‐López et al, 2021).…”

“…The relevance of chemotaxis is also reflected by the fact that about 90% of phytopathogenic bacteria possess chemosensory genes (Ortega, Zhulin, et al, 2017), whereas such genes are only found in 47% of total bacteria (Sanchis‐López et al, 2021). In addition, phytopathogenic bacteria harbour on average 27 chemoreceptor genes (Lacal et al, 2010), a number that is well above the bacterial average of 13 (Sanchis‐López et al, 2021).…”