# RCSB PDB MCP for AI Agents AI Agent Connect

> RCSB PDB MCP lets your AI agent query the world's largest repository of 3D molecular structures. Search for proteins, DNA, and RNA by name, experimental method, or resolution. Get specific details on PDB entries like 1HHO or 6LU7 to find bound ligands and structural metadata instantly.

## Overview
- **Category:** the-unthinkable
- **Price:** Free
- **Endpoint:** https://edge.vinkius.com/vk_preview_px4KJXLkPAfRiw8dj06D8ILeCL0RIsHNqISA0zQD/ai-agent-connect
- **Tags:** bioinformatics, protein-structure, molecular-biology, genomics, data-repository, research-tools

## Description

Imagine you're deep in a research project and need to know the exact resolution of a specific protein structure or what ligands are bound to a target. Instead of jumping between multiple browser tabs and manually filtering through the Protein Data Bank website, you can just ask your agent. This connector links your agent directly to the primary repository of 3D structural data, giving it the ability to pull real-world information on the fly. You can ask it to find all cryo-EM structures of a certain complex or get the full metadata for a specific PDB ID. It handles the heavy lifting of searching through over 220,000 entries so you don't have to. Whether you're looking for specific disease associations or just trying to understand a complex molecular architecture, this tool puts the data right where you're working. It's a massive time-saver for anyone who needs to reference structural biology data without breaking their flow. You'll find it's one of the most reliable ways to keep your research grounded in actual experimental data while using the Vinkius catalog to manage your connections.

## Tools

### get_pdb_structure
Fetch full structural details, including experimental methods and bound molecules, using a 4-character PDB ID. This is useful for getting precise metadata for a known target.

### search_pdb
Search the Protein Data Bank for structures based on names, diseases, or experimental techniques like Cryo-EM. Use this to discover new structures or filter by resolution.

## Prompt Examples

**Prompt:** 
```
What's the resolution of the human hemoglobin structure?
```

**Response:** 
```
I found the details for PDB 1HHO:

**Protein:** Deoxy Human Hemoglobin
**Method:** X-ray Diffraction
**Resolution:** 2.10 Å
**Details:** It contains 4 polymer chains (2 alpha, 2 beta subunits) with heme (protoporphyrin IX containing iron) bound as a cofactor.
```

**Prompt:** 
```
Find me any cryo-EM structures of ribosomes.
```

**Response:** 
```
I found several ribosome structures determined by Cryo-EM. A notable one is the Human 80S ribosome (PDB 4UG0) at 3.6 Å resolution. I also found E. coli 70S ribosome structures with various antibiotics bound.
```

**Prompt:** 
```
Tell me about the SARS-CoV-2 main protease structure.
```

**Response:** 
```
The SARS-CoV-2 main protease (Mpro) structure is found in PDB 6LU7:

* **Method:** X-ray Diffraction
* **Resolution:** 2.16 Å
* **Inhibitor:** N3 (peptide-like inhibitor)
* **Release Date:** 2020-02-05
```

## Capabilities

### Search 220K+ molecular structures
Find specific proteins, DNA, or RNA by name, function, or disease association.

### Retrieve full PDB metadata
Get resolution, experimental methods, and author details for any 4-character PDB ID.

### Filter by experimental method
Isolate structures determined by X-ray diffraction, Cryo-EM, or NMR.

### Identify bound ligands
See which molecules are bound in co-crystal structures for drug discovery.

### Access resolution data
Get precise resolution metrics for biological macromolecules instantly.

### Query disease associations
Find structures linked to specific diseases or organisms across the database.

## Use Cases

### Finding a specific target
A researcher needs the structure of the SARS-CoV-2 protease. The agent uses search_pdb to find 6LU7 and reports the resolution and inhibitors.

### Validating experimental data
A biologist wants to know the resolution of a hemoglobin structure. The agent uses get_pdb_structure on 1HHO to provide the exact X-ray diffraction details.

### Filtering by technique
A team needs only Cryo-EM structures of ribosomes. The agent uses search_pdb to filter the 220K entries and lists the relevant results.

### Ligand identification
A chemist wants to see what's bound to a protein. The agent uses search_pdb to find co-crystal structures and lists the bound molecules.

## Benefits

- Stop manual searching by using search_pdb to find structures by disease or organism in seconds.
- Get precise data like resolution and experimental methods instantly with get_pdb_structure.
- Speed up drug discovery by quickly identifying bound ligands in co-crystal structures.
- Verify protein architecture for students and researchers without opening a browser.
- Access a massive database of 220,000+ entries directly through your agent.
- Filter results by experimental technique using search_pdb to isolate Cryo-EM or X-ray data.

## How It Works

The bottom line is you get instant access to experimental 3D structural data without leaving your chat interface.

1. Subscribe to the RCSB PDB MCP in the Vinkius catalog.
2. Connect the Connector to your preferred AI client.
3. Ask your agent to search for specific proteins or pull PDB ID details.

## Frequently Asked Questions

**Can the RCSB PDB MCP find specific protein structures?**
Yes, it can search over 220,000 entries by name, function, or disease association to find the exact 3D structure you need.

**How do I get experimental details like resolution using the RCSB PDB MCP?**
Your agent can pull the resolution, experimental method, and author details for any specific PDB ID instantly.

**Does the RCSB PDB MCP support Cryo-EM and X-ray data?**
Yes, it allows you to filter structures by their experimental method, including Cryo-EM, X-ray diffraction, and NMR.

**Can I use the RCSB PDB MCP for drug discovery?**
It's a great tool for drug discovery because it helps you identify bound ligands and co-crystal structures for virtual screening.

**What kind of molecules can I find with the RCSB PDB MCP?**
You can find 3D structural data for proteins, DNA, and RNA, along with information on bound ligands and cofactors.

**Do I need an API key for the RCSB PDB MCP?**
No, you don't need an API key to start searching for molecular structures through this Connector.

**What experimental methods are represented in the PDB?**
The PDB contains structures determined by four main methods: X-ray Crystallography (85% of entries, atomic resolution), Cryo-EM (rapidly growing, now 15%+ of new deposits), NMR Spectroscopy (solution-state structures), and Neutron Diffraction (hydrogen atom positions). Each entry lists its method and resolution.

**Do I need authentication to access PDB data?**
No. RCSB PDB is completely free and open — funded by NSF, NIH, DOE, and international partners. All 220K+ structures are openly accessible without any registration or API key. The data is licensed under CC0 (public domain).

**What information does each PDB entry contain?**
Each entry includes: PDB ID (4-character code), structure title, depositing authors, experimental method, resolution in Ångströms, source organism, release date, number of polymer chains, and bound non-polymer ligands (drugs, cofactors, ions). Higher resolution (lower number) means more precise atomic coordinates.