Comparative analysis of membrane protein structure databases

Venn diagram of four major membrane protein structure databases. This figure shows the overlap among the entries of these databases. “mpstruc+” represents the extended dataset of the mpstruc database. “PDB_mp” represents the PDB entries whose classification fields indicate that they are membrane proteins. “OPM” and “PDBTM” are OPM and PDBTM entries, respectively. “SCOP_f” represents the PDB structures with one or more class-f SCOP domains. 139