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Journal of Biological Chemistry
Article . 2004 . Peer-reviewed
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Journal of Biological Chemistry
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Identification of CC Chemokine Receptor 7 Residues Important for Receptor Activation

Authors: Thomas Ott; R. Scott Struthers; David G. Alleva; Anil Pahuja; Sarah A. Nickolls;

Identification of CC Chemokine Receptor 7 Residues Important for Receptor Activation

Abstract

The binding pocket of family A GPCRs that bind small biogenic amines is well characterized. In this study we identify residues on CC chemokine receptor 7 (CCR-7) that are involved in agonist-mediated receptor activation but not in high affinity ligand binding. The mutations also affect the ability of the ligands to induce chemotaxis. Two of the residues, Lys3.33(137) and Gln5.42(227), are consistent with the binding pocket described for biogenic amines, while Lys3.26(130) and Asn7.32(305), are found at, or close to, the cell surface. Our observations are in agreement with findings from other peptide and chemokine receptors, which indicate that receptors that bind larger ligands contain contact sites closer to the cell surface in addition to the conventional transmembrane binding pocket. These findings also support the theory that chemokine receptors require different sets of interactions for high affinity ligand binding and receptor activation.

Related Organizations
Keywords

Binding Sites, Guanine, Chemokine CCL21, Dose-Response Relationship, Drug, Chemotaxis, Glutamine, Cell Membrane, CHO Cells, Inhibitory Concentration 50, Jurkat Cells, Electroporation, Guanosine 5'-O-(3-Thiotriphosphate), Chemokines, CC, Cricetinae, COS Cells, Animals, Chemokine CCL19, Humans, Amino Acid Sequence, Asparagine

  • BIP!
    Impact byBIP!
    citations
    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    25
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Top 10%
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Top 10%
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Average
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
25
Top 10%
Top 10%
Average
gold