Type Description
NP_BIND Extent of a nucleotide phosphate-binding region
DISULFID Cysteine residues participating in disulfide bonds
METAL Binding site for a metal ion
DNA_BIND Denotes the position and type of a DNA-binding domain
MODRES Modified residues excluding lipids, glycans and protein crosslinks
BINDING Binding site for any chemical group (co-enzyme, prosthetic group, etc.)
ZN_FING Denotes the position(s) and type(s) of zinc fingers within the protein
ACT_SITE Amino acid(s) directly involved in the activity of an enzyme
PEPTIDE Extent of an active peptide in the mature protein
MOTIF Short (up to 20 amino acids) sequence motif of biological interest
CARBOHYD Covalently attached glycan group(s)
CA_BIND Denotes the position(s) of calcium binding region(s) within the protein
PROPEP Part of a protein that is cleaved during maturation or activation
SITE Any interesting single amino acid site on the sequence
SIGNAL Sequence targeting proteins to the secretory pathway or periplasmic space
TRANSIT Extent of a transit peptide for organelle targeting
CROSSLNK Residues participating in covalent linkage(s) between proteins
LIPID Covalently attached lipid group(s)
CSA_LIT A database documenting enzyme active sites and catalytic residues in enzymes of 3D structure: original hand-annotated entries, derived from the primary literature
CSA_PSI A database documenting enzyme active sites and catalytic residues in enzymes of 3D structure: homologous entries, found by PSI-BLAST alignment to one of the original entries
PICCOLO A database of protein-protein interaction based on 3D structure