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Exploring CCRL2 chemerin binding using accelerated molecular dynamics
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DOI：10.1002/prot.26348.png)
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摘要
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Chemokine (C-C motif) receptor-like 2 (CCRL2), is a seven transmembrane receptor closely related to the chemokine receptors CCR1, CCR2, CCR3, and CCR5. Nevertheless, CCRL2 is unable to activate conventional G-protein dependent signaling and to induce cell directional migration. The only commonly accepted CCRL2 ligand is the nonchemokine chemotactic protein chemerin (RARRES2). The chemerin binding to CCLR2 does induce leukocyte chemotaxis, yet, genetic targeting of CCRL2 was shown to modulate the inflammatory response in different experimental models. This mechanism was shown to be crucial for lung dendritic cell migration, neutrophil recruitment, and Natural Killer cell-dependent immune surveillance in lung cancer. To gain more insight in the interactions involved in the CCRL2-chemerin, the binding complexes were generated by protein-protein docking, then submitted to accelerated molecular dynamics. The obtained trajectories were inspected by principal component analyses followed by kernel density estimation to identify the ligand-receptor regions most frequently involved in the binding. To conclude, the reported analyses led to the identification of the putative hot-spot residues involved in CCRL2-chemerin binding.
Keyword:
accelerated molecular dynamics
CCRL2
Chemerin
protein-protein docking
protein-protein interaction
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