Primary structural data
	PDB http://www.rcsb.org/pdb Primary archive of all 3D structures of macromolecules, such as proteins, RNA, DNA and various complexes. Up-to-date and searchable via simple or complex queries.
Features databases
	PDBsum http://www.biochem.ucl.ac.uk/bsm/pdbsum Has a page for every structure in the PDB and provides detailed structural analyses, schematic diagrams and data on interactions between the molecules.
	ReLiBase http://www2.ebi.ac.uk:8081/home.html Database of receptor/ligand complexes in the PDB. Allows queries on names, key words, SMILES strings, substructures and protein families.
	PROMISE http://bioinf.leeds.ac.uk/promise/ The Prosthetic groups and Metal Ions in protein active SitEs. Hand-crafted database of metal-protein interaction chemistry and geometry.
Protein Structural Classification
	CATH http://www.biochem.ucl.ac.uk/bsm/cath/ Class Architecture Topology Homology - Christine Orengo, UCL. The CATH database provides a hierarchical domain classification with four major levels; Class, Architecture, Topology (fold family) and Homologous superfamily.
	SCOP http://scop.mrc-lmb.cam.ac.uk/scop/ Structural Classification Of Proteins - Alexey Murzin, Cambridge. The SCOP database is created by manual inspection, although a number of automated methods are used to assist this process.
	FSSP http://www2.embl-ebi.ac.uk/dali/fssp/ Fold classification based on Structure-Structure alignment of Proteins - Liisa Holm, EMBL, Heidelberg. Classification based on exhaustive all-against-all fully-automatic 3D structure comparison of protein structures currently in the Protein Data Bank (PDB).
Speciality databases
	NDB http://ndbserver.rutgers.edu/ The Nucleic Acid Database assembles and distributes structural information about nucleic acids.
	Enzyme Structures Database http://www.biochem.ucl.ac.uk/bsm/enzymes/ Contains all the enzymes of known 3D structure, as deposited in the PDB, classified according to their E.C. numbers.
	HIV Protease Database http://www.ncifcrf.gov/HIVdb Archive of 3D structures of HIV-1, HIV-2 and SIV proteases and their complexes.
	The Protein Kinase Resource http://www.sdsc.edu/kinases/ A compendium of information on the protein kinase family of enzymes. This resource includes tools for structural and computational analyses as well as links to related information maintained by others.
	PROLYSIS http://prolysis.phys.univ-tours.fr/Prolysis/ Contains information of general interest for those interested in proteases and their natural or synthetic inhibitors.
	Chaperonins http://bioc09.uthscsa.edu/~seale/Chap/chap.html A repository for information about the important class of heat shock proteins known as chaperonins.
	GCRDb http://www.gcrdb.uthscsa.edu/ The G-protein Coupled Receptor Database.
	Database of Macromolecular Movements http://bioinfo.mbb.yale.edu/MolMovDB/ Protein Motions Database, including movies and animated GIFs of protein domain movements, etc.
	Movie Gallery http://www.ks.uiuc.edu/Overview/movie_gallery/qt_movies/ Some very pretty Quicktime movies of membrane proteins, DNA-binding proteins, etc.

The RasMol molecular graphics program - a very basic introduction

http://www.biochem.ucl.ac.uk/~roman/denmark/databases/rasmol

Roman Laskowski Department of Crystallography Birkbeck College June 2000