prankweb.cz

What It Is

PrankWeb is a web service for protein–ligand binding site prediction and visualization provided by a Charles University team, and is part of the ELIXIR Czech node service ecosystem. Based on P2Rank, a machine-learning method, it predicts potential small-molecule ligand binding sites from protein structures and presents the results together with structural, sequence, and evolutionary homology information. It is aimed at users in structural biology, drug discovery, and protein function analysis.

Core Capabilities

The tool supports multiple input types, including experimental structures, custom structures, and AlphaFold structures. Jobs can be submitted via a PDB Code, UniProt ID, or by uploading PDB/mmCIF files. Users can also choose whether to use conservation information and switch between modes such as the default model, conservation-enabled model, and AlphaFold model. In addition to online prediction, the website provides downloadable precomputed prediction results for PDB and AlphaFold DB, in both conservation and non-conservation versions.

Pricing and Usage Limits

The website clearly states that it is free for all users, including commercial users, and does not require login. ELIXIR CZ terms require attribution when using its services or data in other products or services, while also disclaiming any guarantee of data accuracy or fitness of the service for a particular purpose. If usage by a single organization affects the public service, ELIXIR CZ may suspend the service and discuss alternative arrangements.

Pros and Cons

Its strengths are a clear academic background, a published underlying method, support for input sources including PDB, AlphaFold, and custom structures, and the combination of prediction with visualization, making it suitable for quick research analysis. Its limitations are that the web service is not designed for large-scale batch processing; the official recommendation for batch jobs is to run P2Rank standalone locally. The main documentation does not provide information on an API, SDK, job capacity, runtime limits, or service SLA, so its engineering integration capabilities are unclear.

Who It’s For and Access from China

PrankWeb is best suited to researchers who need to quickly assess protein binding pockets online, early-stage drug discovery researchers, and teaching scenarios. For high-throughput production workflows, P2Rank standalone should be evaluated. Access from mainland China is not mentioned in the main documentation, so it is considered unknown. Payment is not an issue because the service is free. Alternatives include running P2Rank locally or using other protein binding site prediction and molecular visualization tools.