AI-ACCELERATED DRUG DISCOVERY
Available from Reaxense
This protein is integrated into the Receptor.AI ecosystem as a prospective target with high therapeutic potential. We performed a comprehensive characterization of Phosphate-regulating neutral endopeptidase PHEX including:
1. LLM-powered literature research
Our custom-tailored LLM extracted and formalized all relevant information about the protein from a large set of structured and unstructured data sources and stored it in the form of a Knowledge Graph. This comprehensive analysis allowed us to gain insight into Phosphate-regulating neutral endopeptidase PHEX therapeutic significance, existing small molecule ligands, relevant off-targets, and protein-protein interactions.
Fig. 1. Preliminary target research workflow
2. AI-Driven Conformational Ensemble Generation
Starting from the initial protein structure, we employed advanced AI algorithms to predict alternative functional states of Phosphate-regulating neutral endopeptidase PHEX, including large-scale conformational changes along "soft" collective coordinates. Through molecular simulations with AI-enhanced sampling and trajectory clustering, we explored the broad conformational space of the protein and identified its representative structures. Utilizing diffusion-based AI models and active learning AutoML, we generated a statistically robust ensemble of equilibrium protein conformations that capture the receptor's full dynamic behavior, providing a robust foundation for accurate structure-based drug design.
Fig. 2. AI-powered molecular dynamics simulations workflow
3. Binding pockets identification and characterization
We employed the AI-based pocket prediction module to discover orthosteric, allosteric, hidden, and cryptic binding pockets on the protein’s surface. Our technique integrates the LLM-driven literature search and structure-aware ensemble-based pocket detection algorithm that utilizes previously established protein dynamics. Tentative pockets are then subject to AI scoring and ranking with simultaneous detection of false positives. In the final step, the AI model assesses the druggability of each pocket enabling a comprehensive selection of the most promising pockets for further targeting.
Fig. 3. AI-based binding pocket detection workflow
4. AI-Powered Virtual Screening
Our ecosystem is equipped to perform AI-driven virtual screening on Phosphate-regulating neutral endopeptidase PHEX. With access to a vast chemical space and cutting-edge AI docking algorithms, we can rapidly and reliably predict the most promising, novel, diverse, potent, and safe small molecule ligands of Phosphate-regulating neutral endopeptidase PHEX. This approach allows us to achieve an excellent hit rate and to identify compounds ready for advanced lead discovery and optimization.
Fig. 4. The screening workflow of Receptor.AI
Receptor.AI, in partnership with Reaxense, developed a next-generation technology for on-demand focused library design to enable extensive target exploration.
The focused library for Phosphate-regulating neutral endopeptidase PHEX includes a list of the most effective modulators, each annotated with 38 ADME-Tox and 32 physicochemical and drug-likeness parameters. Furthermore, each compound is shown with its optimal docking poses, affinity scores, and activity scores, offering a detailed summary.
Phosphate-regulating neutral endopeptidase PHEX
partner:
Reaxense
upacc:
P78562
UPID:
PHEX_HUMAN
Alternative names:
Metalloendopeptidase homolog PEX; Vitamin D-resistant hypophosphatemic rickets protein; X-linked hypophosphatemia protein
Alternative UPACC:
P78562; O00678; Q13646; Q2M325; Q93032; Q99827
Background:
Phosphate-regulating neutral endopeptidase PHEX, also known as Metalloendopeptidase homolog PEX, plays a pivotal role in bone mineralization and renal phosphate reabsorption. It functions by cleaving SIBLING-derived ASARM peptides, which are crucial for regulating osteogenic cell differentiation and promoting dentin mineralization. The protein's activity is essential for the proper biological functioning of these peptides, influencing skeletal development and phosphate metabolism.
Therapeutic significance:
PHEX's malfunction is directly linked to Hypophosphatemic rickets, X-linked dominant, a disorder impairing phosphate uptake due to abnormal sodium phosphate cotransport regulation. This condition manifests in skeletal deformities and growth failure, highlighting the protein's critical role in bone health. Understanding the role of Phosphate-regulating neutral endopeptidase PHEX could open doors to potential therapeutic strategies for treating bone mineralization disorders and improving phosphate metabolism.
