TABLE 1.

Trusted external data resources/data content recently integrated within the RCSB.org web portal

Data content type	Resource name
Protein domain structure annotations	Structural classification of proteins (SCOP2) 27
Evolution‐related annotations	Evolutionary classification of protein domains (ECOD) 28
Antibiotic resistance annotations	Comprehensive antibiotic resistance database (CARD) 29
Immunology‐related annotations	International ImMunoGeneTics information system (IMGT)
	Structural antibody database (SAbDab) 30
Small molecule correspondences and annotations	Cambridge structural database (CSD) 31
	Crystallographic open database (COD) 32
	Chemical entities of biological interest (ChEBI) 33
	ChEMBL 34
	NCBI PubChem 35
Glycan correspondences and annotations	GlyGen 36
	GlyTouCan 37
	GlyCosmos 38
Membrane protein annotations	Database of membrane proteins embedded in lipid bilayers (MemProtMD) 39
	Protein data bank of transmembrane proteins (PDBTM) 40
	Orientations of proteins in membranes database (OPM) 41