Human 40S ribosomal proteins containing disordered regions. (A) Images based on the crystal structure of the human 40S ribosomal subunit (protein database: 4UG0; Khatter et al., 2015). Views from the 40S subunit solvent site (left), 40S subunit interface site (middle), and mRNA exit site (right). Disordered 40S ribosomal proteins at the mRNA entry sites (left and middle) are uS2 (red), uS5 (violet), eS21 (green), and eS30 (blue). Disordered 40S ribosomal proteins, which are located at the platform and close to the mRNA exit site, include uS7 (light blue), eS17 (dark red), eS26 (dark blue), and eS28 (orange). Ribosomal RNA and other 40S ribosomal proteins are shown in light gray. (B) Schematic representation of IDPRs in 40S ribosomal subunit proteins. The disordered regions are from the protein database website. The disorder calculations are based on the JRONN method (Yang et al., 2005). Red, potentially disordered; blue, potentially ordered. Shown are the nomenclature of small ribosomal subunit names, the amino acid length, and the potentially disordered regions.