scholarly journals Human Paraoxonase-2 (PON2): Protein Functions and Modulation

Antioxidants ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 256
Author(s):  
Giuseppe Manco ◽  
Elena Porzio ◽  
Teresa Maria Carusone
Keyword(s):  
Hydrolytic Activity ◽  
Principal Function ◽  
Substrate Specificities ◽  
Homoserine Lactones ◽  
Stress Control ◽  
Acyl Homoserine Lactones ◽  
Bacterial Quorum Sensing ◽  
Protein Functions ◽  
Bacterial Quorum ◽  
Hydrolyzing Enzymes

PON1, PON2, and PON3 belong to a family of lactone hydrolyzing enzymes endowed with various substrate specificities. Among PONs, PON2 shows the highest hydrolytic activity toward many acyl-homoserine lactones (acyl-HL) involved in bacterial quorum-sensing signaling. Accordingly, defense against pathogens, such as Brevundimonas aeruginosa (B. aeruginosa), was postulated to be the principal function of PON2. However, recent findings have highlighted the importance of PON2 in oxidative stress control, inhibition of apoptosis, and the progression of various types of malignancies. This review focuses on all of these aspects of PON2.

Inactivation of bacterial quorum sensing signals N-acyl homoserine lactones is widespread in yeasts

2018 ◽  
Vol 122 (1) ◽  
pp. 52-62 ◽  
Author(s):  
Ana Carolina del V. Leguina ◽  
Carolina Nieto ◽  
Hipólito F. Pajot ◽  
Elisa V. Bertini ◽  
Walter Mac Cormack ◽  
...  
Keyword(s):  
Quorum Sensing ◽  
Homoserine Lactones ◽  
Acyl Homoserine Lactones ◽  
Bacterial Quorum Sensing ◽  
Bacterial Quorum ◽  
Quorum Sensing Signals

scholarly journals The GCR1 and GPA1 Participate in Promotion of Arabidopsis Primary Root Elongation Induced by N-Acyl-Homoserine Lactones, the Bacterial Quorum-Sensing Signals

2012 ◽  
Vol 25 (5) ◽  
pp. 677-683 ◽  
Author(s):  
Fang Liu ◽  
Ziriu Bian ◽  
Zhenhua Jia ◽  
Qian Zhao ◽  
Shuishan Song
Keyword(s):  
Quorum Sensing ◽  
Root Elongation ◽  
Primary Root ◽  
Homoserine Lactone ◽  
Collective Behaviors ◽  
Homoserine Lactones ◽  
Acyl Homoserine Lactones ◽  
Bacterial Quorum Sensing ◽  
Bacterial Quorum ◽  
Quorum Sensing Signals

Many gram-negative bacteria use N-acyl-homoserine lactones (AHL) as quorum-sensing signals to coordinate their collective behaviors. Accumulating evidence indicates that plants can respond to AHL. However, little is known about the molecular mechanism of plants reacting to these bacterial signals. In this study, we show that the treatment of Arabidopsis roots with N-3-oxo-hexanoyl-homoserine lactone (3OC6-HSL) and N-3-oxo-octanoyl-homoserine lactone (3OC8-HSL) resulted in significant root elongation. The genetic analysis revealed that the T-DNA insertional mutants of gcr1, encoding a G-protein-coupled receptor GCR1, were insensitive to 3OC6-HSL or 3OC8-HSL in assays of root growth. The loss-of-function mutants of the sole canonical Gα subunit GPA1 showed no response to AHL promotion of root elongation whereas Gα gain-of-function plants overexpressing either the wild type or a constitutively active version of Arabidopsis Gα exhibited the exaggerated effect on root elongation caused by AHL. Furthermore, the expression of GCR1 and GPA1 were significantly upregulated after plants were contacted with both AHL. Taken together, our results suggest that GCR1 and GPA1 are involved in AHL-mediated elongation of Arabidopsis roots. This provides insight into the mechanism of plant responses to bacterial quorum-sensing signals.

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