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Twin Peaks: Presenting the Antagonistic Molecular Interplay of Curcumin with LasR and LuxR Quorum Sensing Pathways
Current Microbiology ( IF 2.3 ) Pub Date : 2020-04-24 , DOI: 10.1007/s00284-020-01997-2
Arpit Shukla 1 , Paritosh Parmar 1 , Priyashi Rao 2 , Dweipayan Goswami 1 , Meenu Saraf 1
Affiliation  

Quorum sensing in bacteria is a cell density-dependent phenomenon in which, a community of cells communicate with each other using signalling molecules belonging to various families of which N -acyl homoserine lactone (AHL) is one. AHL acts via ligand–receptor interaction where receptors of AHL differ from species to species, and possess great degree of similarity in conformation at the active site. A macromolecule, LasR, is a receptor protein that binds to N -(3-oxododecanoyl)- l -homoserinelactone (OdDHL), a type of AHL, viz. responsible for biofilm formation in Pseudomonas aeruginosa . Similar macromolecule LuxR, like LasR, found in Vibrio sp. identifies a different AHL, N -(3-oxohexanoyl)- l -homoserine lactone (OhHSL), responsible for the phenomenon of bioluminescence. In silico study depicted that curcumin could bind to both LasR and LuxR by unique sets of hydrogen bonding and hydrophobic interactions that can lead to the inactivation of these proteins, enabling this plant-derived organic AHL antagonist to be categorized as a quorum sensing inhibitor (QSI). To prove this hypothesis, curcumin was treated on P. aeruginosa to access the reduction in biofilm formation and on V. alginolyticus to check its efficacy to reduction in bioluminescence by inhibition of QS. The results of these studies proved curcumin to be an efficient QSI.

中文翻译:

双峰:展示姜黄素与 LasR 和 LuxR 群体感应通路的拮抗分子相互作用

细菌中的群体感应是一种细胞密度依赖性现象,其中细胞群落使用属于各种家族的信号分子相互通信,其中 N-酰基高丝氨酸内酯 (AHL) 就是其中之一。AHL 通过配体-受体相互作用起作用,其中 AHL 的受体因物种而异,并且在活性位点的构象上具有很大程度的相似性。大分子 LasR 是一种受体蛋白,可与 N-(3-氧代十二烷酰基)-l-高丝氨酸内酯 (OdDHL) 结合,这是一种 AHL,即。负责铜绿假单胞菌中生物膜的形成。类似的大分子 LuxR,如 LasR,在 Vibrio sp. 中发现。鉴定了不同的 AHL,N -(3-氧代己酰基)- l -高丝氨酸内酯(OhHSL),负责生物发光现象。计算机研究表明,姜黄素可以通过独特的氢键和疏水相互作用与 LasR 和 LuxR 结合,从而导致这些蛋白质失活,从而使这种植物来源的有机 AHL 拮抗剂被归类为群体感应抑制剂 (QSI) )。为了证明这一假设,姜黄素在铜绿假单胞菌上处理以减少生物膜形成,在溶藻弧菌上处理姜黄素以检查其通过抑制 QS 减少生物发光的功效。这些研究的结果证明姜黄素是一种有效的 QSI。aeruginosa 获得生物膜形成的减少,并在 V. alginolyticus 上检查其通过抑制 QS 减少生物发光的功效。这些研究的结果证明姜黄素是一种有效的 QSI。aeruginosa 获得生物膜形成的减少,并在 V. alginolyticus 上检查其通过抑制 QS 减少生物发光的功效。这些研究的结果证明姜黄素是一种有效的 QSI。
更新日期:2020-04-24
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