Identification of a conserved chemokine receptor motif that enables ligand discrimination
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Identification of a conserved chemokine receptor motif that enables ligand discrimination. / Larsen, Olav; van der Velden, Wijnand J.C.; Mavri, Maša; Schuermans, Sara; Rummel, Pia C.; Karlshøj, Stefanie; Gustavsson, Martin; Proost, Paul; Våbenø, Jon; Rosenkilde, Mette M.
I: Science Signaling, Bind 15, Nr. 724, eabg7042, 2022.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Identification of a conserved chemokine receptor motif that enables ligand discrimination
AU - Larsen, Olav
AU - van der Velden, Wijnand J.C.
AU - Mavri, Maša
AU - Schuermans, Sara
AU - Rummel, Pia C.
AU - Karlshøj, Stefanie
AU - Gustavsson, Martin
AU - Proost, Paul
AU - Våbenø, Jon
AU - Rosenkilde, Mette M.
N1 - Publisher Copyright: © 2022 The Authors, some rights reserved.
PY - 2022
Y1 - 2022
N2 - Extensive ligand-receptor promiscuity in the chemokine signaling system balances beneficial redundancy and specificity. However, this feature poses a major challenge to selectively modulate the system pharmacologically. Here, we identified a conserved cluster of three aromatic receptor residues that anchors the second extracellular loop (ECL2) to the top of receptor transmembrane helices (TM) 4 and 5 and enables recognition of both shared and specific characteristics of interacting chemokines. This cluster was essential for the activation of several chemokine receptors. Furthermore, characteristic motifs of the ß1 strand and 30s loop make the two main CC-chemokine subgroups-the macrophage inflammatory proteins (MIPs) and monocyte chemoattractant proteins (MCPs)-differentially dependent on this cluster in the promiscuous receptors CCR1, CCR2, and CCR5. The cluster additionally enabled CCR1 and CCR5 to discriminate between closely related MIPs based on the N terminus of the chemokine. G protein signaling and β-arrestin2 recruitment assays confirmed the importance of the conserved cluster in receptor discrimination of chemokine ligands. This extracellular site may facilitate the development of chemokine-related therapeutics.
AB - Extensive ligand-receptor promiscuity in the chemokine signaling system balances beneficial redundancy and specificity. However, this feature poses a major challenge to selectively modulate the system pharmacologically. Here, we identified a conserved cluster of three aromatic receptor residues that anchors the second extracellular loop (ECL2) to the top of receptor transmembrane helices (TM) 4 and 5 and enables recognition of both shared and specific characteristics of interacting chemokines. This cluster was essential for the activation of several chemokine receptors. Furthermore, characteristic motifs of the ß1 strand and 30s loop make the two main CC-chemokine subgroups-the macrophage inflammatory proteins (MIPs) and monocyte chemoattractant proteins (MCPs)-differentially dependent on this cluster in the promiscuous receptors CCR1, CCR2, and CCR5. The cluster additionally enabled CCR1 and CCR5 to discriminate between closely related MIPs based on the N terminus of the chemokine. G protein signaling and β-arrestin2 recruitment assays confirmed the importance of the conserved cluster in receptor discrimination of chemokine ligands. This extracellular site may facilitate the development of chemokine-related therapeutics.
U2 - 10.1126/scisignal.abg7042
DO - 10.1126/scisignal.abg7042
M3 - Journal article
C2 - 35258997
AN - SCOPUS:85126079589
VL - 15
JO - Science Signaling
JF - Science Signaling
SN - 1945-0877
IS - 724
M1 - eabg7042
ER -
ID: 316683793