Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 14, Issue 40, Pages 8994-9001Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.3c01443
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The study explores the potential connection between LRRC15 and SARS-CoV-2 and investigates the structure-function mechanism and interaction mode. The findings suggest alternative binding modes between the RBD and LRR units of LRRC15, indicating their differential roles. However, further experimental validations are required to unravel the unknown mechanism and distinctive features of this host receptor in COVID-19.
The detection of leucine-rich repeat containing 15 (LRRC15) as a connecting link with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) underscores the possibility of its involvement in differential restriction activity of SARS-CoV-2 pathways. However, the structure-function mechanism of LRRC15 involving the receptor binding domain (RBD) of the SARS-CoV-2 spike protein and their mode of interaction is largely unknown. Using state-of-the-art AlphaFold2 and all-atom molecular dynamics simulations, our findings provide evidences of alternative binding modes of RBD with LRR units of LRRC15 having varied affinities. Contribution of both the receptor binding regions in RBD, including receptor binding motif in accommodating the LRR domain, towards the C-terminal region, emphasizes its differential role in modulating host cell receptiveness for SARS-CoV-2, the innate immune system, as well as antiviral tone. However, further experimental validations are necessary for unravelling the unknown mechanism and distinctive features of this host receptor in the COVID-19 pandemic, involving both the transmembrane as well as cytoplasmic domain.
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