7YQE image
Deposition Date 2022-08-06
Release Date 2023-08-16
Last Version Date 2024-10-09
Entry Detail
PDB ID:
7YQE
Title:
Structure of human SRC regulatory domains in complex with the C-terminal PRRP motifs of GPR54.
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Host Organism:
Method Details:
Experimental Method:
Resolution:
3.50 Å
R-Value Free:
0.29
R-Value Work:
0.26
R-Value Observed:
0.27
Space Group:
P 31 2 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Proto-oncogene tyrosine-protein kinase Src,KiSS-1 receptor
Gene (Uniprot):SRC, KISS1R
Mutations:C338S,C340S
Chain IDs:A, B
Chain Length:188
Number of Molecules:2
Biological Source:Homo sapiens
Ligand Molecules
Primary Citation
Kisspeptin-10 binding to Gpr54 in osteoclasts prevents bone loss by activating Dusp18-mediated dephosphorylation of Src.
Nat Commun 15 1300 1300 (2024)
PMID: 38346942 DOI: 10.1038/s41467-024-44852-9

Abstact

Osteoclasts are over-activated as we age, which results in bone loss. Src deficiency in mice leads to severe osteopetrosis due to a functional defect in osteoclasts, indicating that Src function is essential in osteoclasts. G-protein-coupled receptors (GPCRs) are the targets for ∼35% of approved drugs but it is still unclear how GPCRs regulate Src kinase activity. Here, we reveal that GPR54 activation by its natural ligand Kisspeptin-10 (Kp-10) causes Dusp18 to dephosphorylate Src at Tyr 416. Mechanistically, Gpr54 recruits both active Src and the Dusp18 phosphatase at its proline/arginine-rich motif in its C terminus. We show that Kp-10 binding to Gpr54 leads to the up-regulation of Dusp18. Kiss1, Gpr54 and Dusp18 knockout mice all exhibit osteoclast hyperactivation and bone loss, and Kp-10 abrogated bone loss by suppressing osteoclast activity in vivo. Therefore, Kp-10/Gpr54 is a promising therapeutic target to abrogate bone resorption by Dusp18-mediated Src dephosphorylation.

Legend

Protein

Chemical

Disease

Primary Citation of related structures