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 AP-1 complex subunit sigma-1A 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 AP-1 complex subunit sigma-1A 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 AP-1 complex subunit sigma-1A, 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 AP-1 complex subunit sigma-1A. 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 AP-1 complex subunit sigma-1A. 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 AP-1 complex subunit sigma-1A 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.
AP-1 complex subunit sigma-1A
partner:
Reaxense
upacc:
P61966
UPID:
AP1S1_HUMAN
Alternative names:
Adaptor protein complex AP-1 subunit sigma-1A; Adaptor-related protein complex 1 subunit sigma-1A; Clathrin assembly protein complex 1 sigma-1A small chain; Clathrin coat assembly protein AP19; Golgi adaptor HA1/AP1 adaptin sigma-1A subunit; HA1 19 kDa subunit; Sigma 1a subunit of AP-1 clathrin; Sigma-adaptin 1A; Sigma1A-adaptin
Alternative UPACC:
P61966; B2R5D8; P82267; Q00382; Q53YA7; Q9BTN4; Q9UDW9
Background:
The AP-1 complex subunit sigma-1A, known by various names such as Adaptor protein complex AP-1 subunit sigma-1A and Clathrin assembly protein complex 1 sigma-1A small chain, plays a crucial role in protein sorting within the late-Golgi/trans-Golgi network (TGN) and/or endosomes. This protein is integral to the recruitment of clathrin to membranes and the recognition of sorting signals within the cytosolic tails of transmembrane cargo molecules.
Therapeutic significance:
AP-1 complex subunit sigma-1A is implicated in MEDNIK syndrome, a disorder marked by a spectrum of symptoms including erythematous skin lesions, hyperkeratosis, and severe psychomotor retardation, among others. Understanding the role of AP-1 complex subunit sigma-1A could open doors to potential therapeutic strategies for this syndrome.
