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PTH1R

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All listed services and products are For Research Use Only. Do Not use in any diagnostic or therapeutic applications.

Background

Parathyroid hormone 1 receptor (PTH1R) is a class B seven-transmembrane G protein-coupled receptor encoded by the PTH1R gene, predominantly expressed in osteoblasts, renal tubular epithelium and chondrocyte populations, localized exclusively to plasma membrane lipid bilayers. Distinct from other peptide GPCR paralogs, PTH1R specifically binds endocrine PTH and paracrine PTHrP ligands to simultaneously activate Gs-cAMP and Gq-IP3-calcium dual signaling cascades. Under physiological steady-state mineral balance, basal PTH1R expression maintains mild bone turnover and renal calcium reabsorption without abnormal serum calcium fluctuation. Upon hypocalcemic stimulation, elevated circulating PTH engages cell-surface PTH1R to amplify osteoclastogenic signals and boost tubular calcium retention programs. Unlike tissue-restricted peptide receptors, PTH1R carries systemic calcium-regulating functions that cannot be fully substituted by other GPCR members, linking hormone ligand recognition to skeletal mineral homeostasis pathways. Loss of functional PTH1R disrupts calcium reabsorption and impairs bone remodeling capacity, while sustained receptor hyperactivation induces pathological hypercalcemia and bone loss, establishing PTH1R as a core research target for class B GPCR biology and anti-osteoporotic compound screening.

PTH1R executes dual G-protein dependent signal transduction function embedded within osteoblastic and renal cell membranes, utilizing conserved extracellular ligand-binding ectodomains to selectively capture PTH/PTHrP polypeptide ligands. Conserved ligand-binding pocket architecture distinguishes its peptide selectivity from unrelated hormone receptors. PTH1R-mediated conformational rearrangement bridges extracellular hormone stimulation and dual intracellular secondary messenger cascades, balancing bone resorption and renal calcium transport magnitude according to circulating mineral hormone levels. PTH1R participates in embryonic skeletal development, adult bone turnover and systemic calcium-phosphate homeostasis. Deficient PTH1R signaling leads to hypocalcemia and chondrodysplasia phenotypes. Therefore, PTH1R represents a pivotal research target for peptide GPCR study and metabolic bone compound screening.

Fig. 1 Schematic of PTHLH-PTH1R tumorigenic crosstalk plus Transwell invasion and senescence assay statistical results. (OA Literature)Fig. 1 Dual intracrine and paracrine/autocrine PTHLH-PTH1R signaling axis driving neuroblastoma malignancy, with supporting quantitative data of cell invasion and senescence upon PTH1R knockdown and PTHLH ligand stimulation.1

PTH1R Protein Function: Core Roles in PTH Ligand Recognition and Mineral Homeostatic Tuning

The biological functions of PTH1R are focused on PTH/PTHrP binding, dual Gs/Gq signal initiation and calcium balance control:

  • PTH Ligand Capture: Selectively binds parathyroid hormone and PTH-related peptide via extracellular receptor domains.
  • Dual G-Protein Coupling: Activates both cAMP and IP3-calcium secondary messenger pathways after ligand binding.
  • Systemic Mineral Homeostasis: Maintains baseline calcium reabsorption and physiological bone turnover under resting status.
  • Bone Remodeling Modulation: Adjusts osteoclast differentiation signal intensity upon hypocalcemic hormone stimuli.
  • Disease Relevance: PTH1R loss causes hypocalcemia and skeletal developmental defects; persistent receptor activation drives hypercalcemic bone loss.

PTH1R Protein Product

Creative Biolabs offers high-quality PTH1R proteins through optimized expression systems, including full-length seven-transmembrane receptor and isolated extracellular ligand-binding domain variants. These products retain native PTH binding and dual G-protein signaling biological activity, suitable for ligand-receptor interaction assays and bone metabolic modulator screening. All PTH1R proteins undergo strict quality control to ensure consistent performance and reliable application across diverse research platforms.

PTH1R Protein Product

Not finding the membrane protein product you need? Contact us to start your one-stop custom service!

PTH1R Stable Cell Line Product

Creative Biolabs provides custom-engineered PTH1R stable cell lines, including overexpression and blank control models. These cell lines are optimized for class B GPCR expression profiling and dual cAMP/calcium signal functional analysis. Each cell line undergoes stringent validation to ensure stable expression profiles and consistent functional performance in diverse experimental contexts.

PTH1R Stable Cell Line Product

Not finding the stable cell line product you need? Contact us to start your one-stop custom service!

PTH1R Recombinant Antibody Product

High-specificity recombinant antibodies targeting PTH1R are developed via advanced antibody engineering technologies, with no cross-reactivity with other class B peptide GPCRs. These antibodies are validated for osteoblast/renal cell plasma membrane localization detection and skeletal tissue expression profiling, and can be combined with PTH detection reagents to analyze complete hormone-receptor signaling complexes in bone cell models.

PTH1R Recombinant Antibody Product

Not finding the recombinant antibody product you need? Contact us to start your one-stop custom service!

Product Features

  • Native PTH Binding & Dual G-Protein Activity: Preserves intact ligand recognition and dual cAMP/calcium signaling capacity for skeletal metabolism research.
  • PTH Receptor Specificity: Eliminates non-specific cross-recognition of unrelated peptide GPCR family proteins.
  • Bone Biology Compatibility: Optimized reagent series for calcium homeostasis and anti-osteoporotic therapeutic screening workflows.
  • Comprehensive Customization Support: Facilitates end-to-end development of customized proteins, antibodies and stable cell lines to address class B GPCR research demands.

Custom PTH1R Research Services

Beyond catalog products, Creative Biolabs offers specialized custom services for PTH1R research:

  • Custom PTH1R Protein Production: Tailored expression of mutant and tagged PTH1R constructs for PTH ligand binding interaction analysis.
  • Custom Antibody Development: Generation of PTH1R-specific antibodies for osteoblast and renal membrane immunostaining.
  • Stable Cell Line Engineering: Construction of PTH1R-modified cell models for dual second messenger signaling research.
  • Functional Assay Development: Custom design of ligand binding and cAMP/calcium detection workflows.

Frequently Asked Questions (FAQ)

  1. What is the primary function of PTH1R?

    PTH1R is a dual Gs/Gq-coupled class B GPCR that binds PTH and PTHrP to activate cAMP and calcium signals governing systemic calcium balance and bone remodeling.

  2. Why is PTH1R a significant research target?

    PTH1R acts as the central endocrine receptor coordinating renal calcium reabsorption and osteoclast differentiation, representing a core target for metabolic bone disorder study.

  3. Are Creative Biolabs' PTH1R products suitable for clinical use?

    No, all PTH1R products and services are strictly for research use only, not intended for clinical diagnosis or treatment.

  4. What types of PTH1R products does Creative Biolabs offer?

    Offerings include full-length PTH1R GPCR proteins, isoform-specific detection antibodies and custom stable cell lines for skeletal calcium research.

  5. How are PTH1R proteins validated for activity?

    PTH1R proteins are validated via PTH ligand binding and dual cAMP/calcium signaling functional testing.

Reference
  1. García, Marta, et al. "Parathyroid hormone‐like hormone plays a dual role in neuroblastoma depending on PTH 1R expression." Molecular Oncology 13.9 (2019): 1959-1975. Under Open Access license CC BY 4.0, without modification. https://doi.org/10.1002/1878-0261.12542
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