Nanobodies as negative allosteric modulators for human calcium sensing receptor.
Biochem Biophys Res Commun
; 695: 149401, 2024 02 05.
Article
de En
| MEDLINE
| ID: mdl-38154264
ABSTRACT
Human calcium sensing receptor (CaSR) senses calcium ion concentrations in vivo and is an important class of drug targets. Mutations in the receptor can lead to disorders of calcium homeostasis, including hypercalcemia and hypocalcemia. Here, 127 CaSR-targeted nanobodies were generated from camels, and four nanobodies with inhibitory function were further identified. Among these nanobodies, NB32 can effectively inhibit the mobilization of intracellular calcium ions (Ca2+i) and suppress the G12/13 and ERK1/2 signaling pathways downstream of CaSR. Moreover, it enhanced the inhibitory effect of the calcilytics as a negative allosteric modulator (NAM). We determined the structure of complex and found NB32 bound to LB2 (Ligand-binding 2) domain of CaSR to prevent the interaction of LB2 domains of two protomers to stabilize the inactive state of CaSR.
Mots clés
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Anticorps à domaine unique
/
Hypercalcémie
/
Hypocalcémie
Limites:
Humans
Langue:
En
Journal:
Biochem Biophys Res Commun
/
Biochem. biophys. res. commun
/
Biochemical and biophysical research communications
Année:
2024
Type de document:
Article
Pays d'affiliation:
Chine
Pays de publication:
États-Unis d'Amérique