ChEBI	Chemical entities of biological interest
CSD	Cambridge structural database: crystal structure information for organic andmetal-organic compounds
HIC-Up	Hetero-compound Information Centre—Uppsala
AANT	Amino acid–nucleotide interaction database
Klotho	Collection and categorization of biological compounds
LIGAND	Chemical compounds and reactions in biological pathways
PDB-Ligand	3D structures of small molecules bound to proteins and nucleic acids
PubChem	Structures and biological activities of small organic molecules
CCSD	Complex carbohydrate structure database (CarbBank)
SWEET-DB	Annotated carbohydrate structure and substance information
NDB	Nucleic acid-containing structures
RNABase	RNA-containing structures from PDB and NDB
SCOR	Structural classification of RNA: RNA motifs by structure, function andtertiary interactions
ArchDB	Automated classification of protein loop structures
ASTRAL	Sequences of domains of known structure, selected subsets and sequence–structure correspondences
BAliBASE	A database for comparison of multiple sequence alignments
BioMagResBank	NMR spectroscopic data for proteins and nucleic acid
CADB	Conformational angles in proteins database
CATH	Protein domain structures database
CE	3D protein structure alignments
Dali	Protein fold classification using the Dali search engine
DisProt	Database of Protein Disorder: proteins that lack fixed 3D structure in theirnative states
DomIns	Domain insertions in known protein structures
DSDBASE	Native and modeled disulfide bonds in proteins
DSMM	Database of simulated molecular motions
Gene3D	Precalculated structural assignments for whole genomes
GTD	Genomic threading database: structural annotations of complete proteomes
GTOP	Protein fold predictions from genome sequences
Het-PDB Navi	Hetero-atoms in protein structures
IMGT/3Dstructure	DB Sequences and 3D structures of vertebrate immunoglobulins, T cellreceptors and MHC proteins
ISSD	Integrated sequence–structure database
MMDB	NCBI’s database of 3D structures, part of NCBI Entrez
E-MSD	EBI’s macromolecular structure database
ModBase	Annotated comparative protein structure models
MolMovDB	Database of macromolecular movements: descriptions of protein andmacromolecular motions, including movies
PALI	Phylogeny and alignment of homologous protein structures
PASS2	Structural motifs of protein superfamilies
PepConfDB	A database of peptide conformations
PDB Protein structure databank	all publicly available 3D structures of proteinsand nucleic acids
PDBsum	Summaries and analyses of PDB structures
PDB_TM	Transmembrane proteins with known 3D structure
SCOP	Structural classification of proteins
SWISS-MODEL Repository	Database of annotated 3D protein structure models
SURFACE	Surface residues and functions annotated, compared and evaluated: adatabase of protein surface patches
TargetDB	Target data from worldwide structural genomics projects
3D-GENOMICS	Structural annotations for complete proteomes
TOPS	Topology of protein structures database