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 Speckle targeted PIP5K1A-regulated poly(A) polymerase 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 Speckle targeted PIP5K1A-regulated poly(A) polymerase 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 Speckle targeted PIP5K1A-regulated poly(A) polymerase, 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 Speckle targeted PIP5K1A-regulated poly(A) polymerase. 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 Speckle targeted PIP5K1A-regulated poly(A) polymerase. 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 Speckle targeted PIP5K1A-regulated poly(A) polymerase 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.
Speckle targeted PIP5K1A-regulated poly(A) polymerase
partner:
Reaxense
upacc:
Q9H6E5
UPID:
STPAP_HUMAN
Alternative names:
RNA-binding motif protein 21; U6 snRNA-specific terminal uridylyltransferase 1
Alternative UPACC:
Q9H6E5; A1A527; A8K995; Q2NL65; Q7L583; Q9H6H7
Background:
The Speckle targeted PIP5K1A-regulated poly(A) polymerase, also known as RNA-binding motif protein 21 and U6 snRNA-specific terminal uridylyltransferase 1, plays a pivotal role in mRNA processing. It is responsible for the polyadenylation of specific pre-mRNAs, a crucial step in mRNA maturation and regulation. This enzyme localizes to nuclear speckles, working alongside PIP5K1A to selectively polyadenylate mRNAs like HMOX1. Beyond polyadenylation, it is essential for pre-mRNA 3'-end cleavage, facilitating the CPSF complex assembly on pre-mRNAs for accurate mRNA processing.
Therapeutic significance:
Understanding the role of Speckle targeted PIP5K1A-regulated poly(A) polymerase could open doors to potential therapeutic strategies.
