7vvo
From Proteopedia
PTH-bound human PTH1R in complex with Gs (class5)
Structural highlights
DiseasePTHY_HUMAN Defects in PTH are a cause of familial isolated hypoparathyroidism (FIH) [MIM:146200; also called autosomal dominant hypoparathyroidism or autosomal dominant hypocalcemia. FIH is characterized by hypocalcemia and hyperphosphatemia due to inadequate secretion of parathyroid hormone. Symptoms are seizures, tetany and cramps. FIH exist both as autosomal dominant and recessive forms of hypoparathyroidism.[1] [2] [3] FunctionPTHY_HUMAN PTH elevates calcium level by dissolving the salts in bone and preventing their renal excretion. Stimulates [1-14C]-2-deoxy-D-glucose (2DG) transport and glycogen synthesis in osteoblastic cells.[4] Publication Abstract from PubMedEndogenous parathyroid hormone (PTH) and PTH-related peptide (PTHrP) bind to the parathyroid hormone receptor 1 (PTH1R) and activate the stimulatory G-protein (Gs) signaling pathway. Intriguingly, the two ligands have distinct signaling and physiological properties: PTH evokes prolonged Gs activation, whereas PTHrP evokes transient Gs activation with reduced bone-resorption effects. The distinct molecular actions are ascribed to the differences in ligand recognition and dissociation kinetics. Here, we report cryoelectron microscopic structures of six forms of the human PTH1R-Gs complex in the presence of PTH or PTHrP at resolutions of 2.8 -4.1 A. A comparison of the PTH-bound and PTHrP-bound structures reveals distinct ligand-receptor interactions underlying the ligand affinity and selectivity. Furthermore, five distinct PTH-bound structures, combined with computational analyses, provide insights into the unique and complex process of ligand dissociation from the receptor and shed light on the distinct durations of signaling induced by PTH and PTHrP. Endogenous ligand recognition and structural transition of a human PTH receptor.,Kobayashi K, Kawakami K, Kusakizako T, Miyauchi H, Tomita A, Kobayashi K, Shihoya W, Yamashita K, Nishizawa T, Kato HE, Inoue A, Nureki O Mol Cell. 2022 Sep 15;82(18):3468-3483.e5. doi: 10.1016/j.molcel.2022.07.003. , Epub 2022 Aug 5. PMID:35932760[5] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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Categories: Bos taurus | Homo sapiens | Large Structures | Rattus norvegicus | Unidentified | Kato HE | Kobayashi K | Kusakizako T | Miyauchi H | Nishizawa T | Nureki O | Shihoya W | Tomita A | Yamashita K
