alterlab-chai

Featured

Predict biomolecular complexes with Chai-1, an open AlphaFold3-style model that folds multi-entity assemblies (proteins, ligands, nucleic acids) from a single typed FASTA — strong on antibody–antigen and protein–ligand complexes, with optional MSA and restraint inputs. Use when predicting an antibody–antigen complex, folding a mixed protein/ligand/nucleic-acid assembly described in one FASTA, or generating a complex with experimental restraints. For binding-affinity prediction or a ligand-focused co-fold prefer alterlab-boltz; for protein-only or protein–protein folding prefer alterlab-alphafold; to dock into a fixed receptor prefer alterlab-diffdock. Part of the AlterLab Academic Skills suite.

AI & Automation 66 stars 13 forks Updated 1 weeks ago MIT

Install

View on GitHub

Quality Score: 89/100

Stars 20%
61
Recency 20%
90
Frontmatter 20%
70
Documentation 15%
100
Issue Health 10%
50
License 10%
100
Description 5%
100

Skill Content

# Chai-1 (open complex prediction) ## Overview **Chai-1** (Chai Discovery 2024; `chaidiscovery/chai-lab`) is an open AlphaFold3-style model that predicts **multi-entity biomolecular complexes** — proteins, small-molecule ligands, and nucleic acids together — from a **single typed FASTA**. It is particularly used for **antibody–antigen** and protein–ligand complexes, can run with or without MSAs, and accepts **restraints** to guide the prediction. Its niche relative to the other folders: one FASTA describing a *mixed assembly*, and antibody–antigen in particular. For a ligand co-fold where you specifically want a **binding affinity**, use `alterlab-boltz`; for a bare protein, use `alterlab-alphafold`. ## When to Use This Skill Use this skill when the user wants to: - Predict an **antibody–antigen** complex structure. - Fold a **mixed assembly** (protein + ligand + nucleic acid) described in one FASTA. - Run complex prediction **with or without MSAs**, optionally guided by restraints. - Get an open AlphaFold3-style complex prediction with per-entity confidence. ### Does NOT Trigger | Scenario | Use instead | |----------|-------------| | Predict a protein–ligand **binding affinity** | `alterlab-boltz` | | Protein-only or protein–protein folding | `alterlab-alphafold` | | Dock a ligand into a **fixed** receptor structure | `alterlab-diffdock` | | Look up an experimental complex structure | `alterlab-pdb` | | Design antibody/interface sequences | `alterlab-proteinmpnn` / `a...

Details

Author
AlterLab-IEU
Repository
AlterLab-IEU/AlterLab-Academic-Skills
Created
5 months ago
Last Updated
1 weeks ago
Language
Python
License
MIT

Integrates with

Bundled in these plugins

Similar Skills

Semantically similar based on skill content — not just same category

AI & Automation Featured

alterlab-boltz

Co-fold biomolecular complexes with Boltz-2, an open AlphaFold3-style model — predict protein + ligand (SMILES/CCD), protein + nucleic-acid, and multi-chain structures in one pass, with binding-affinity prediction. Use when folding a protein together with a small-molecule ligand, predicting a holo (ligand-bound) complex or its binding affinity, or co-folding protein–DNA/RNA assemblies. For protein-only or protein–protein folding without ligands prefer alterlab-alphafold; for antibody–antigen complexes prefer alterlab-chai; to dock a ligand into a FIXED receptor structure prefer alterlab-diffdock; to look up an existing structure prefer alterlab-pdb. Part of the AlterLab Academic Skills suite.

66 Updated 1 weeks ago
AlterLab-IEU
AI & Automation Featured

alterlab-alphafold

Predict protein 3D structures with AlphaFold2 via ColabFold — MMseqs2-accelerated MSAs, monomer and AlphaFold2-Multimer complex folding, and confidence-based validation (pLDDT, pTM/ipTM, PAE). Use when folding a protein sequence or complex from FASTA, generating a predicted structure with confidence metrics, ranking models, or checking self-consistency of a design. For co-folding a protein WITH a small-molecule ligand or predicting binding affinity prefer alterlab-boltz; for antibody–antigen or one-FASTA multi-entity complexes prefer alterlab-chai; to LOOK UP an already-computed structure prefer alterlab-alphafold-db; for ESM embeddings or inverse folding prefer alterlab-esm. Part of the AlterLab Academic Skills suite.

66 Updated 1 weeks ago
AlterLab-IEU
AI & Automation Featured

alterlab-diffdock

Predicts protein-ligand binding poses with DiffDock diffusion-based molecular docking from PDB structures and SMILES, producing pose confidence scores for virtual screening and structure-based drug design. Use when docking ligands into a protein, generating binding poses, or screening compounds against a target; not for binding affinity prediction. Part of the AlterLab Academic Skills suite.

66 Updated 1 weeks ago
AlterLab-IEU