Table 1 List of PDB IDs of structures in free-RNA, bound-RNA and DNA dataset

free-RNA (88)

157D, 1CSL, 1DQH, 1DUQ, 1EHZ, 1EVV, 1 F27, 1GID, 1HR2, 1I9X, 1KFO, 1KH6, 1L2X, 1LC4, 1MHK, 1NLC, 1NTB, 1NUJ, 1NYI, 1Q29, 1QC0, 1RNA, 1SDR, 1T0D, 1T0E, 1U8D, 1U9S, 1X9C, 1XJR, 1Y26, 1Y27, 1YFG, 1YZD, 1Z79, 1Z7F, 1ZCI, 1ZEV, 1ZFT, 1ZFV, 1ZFX, 1ZX7, 205D, 255D, 280D, 283D, 2A43, 2AO5, 2B57, 2D2K, 2D2L, 2ET5, 2FGP, 2FQN, 2G92, 2H1M, 2OE5, 2OE8, 2OEU, 2OIY, 2PN4, 2PWT, 2Q1O, 2Q1R, 2R20, 2Z75, 353D, 354D, 361D, 364D, 397D, 3B31, 3B4B, 3B5S, 3CJZ, 3CZW, 3D0X, 3D2V, 3DIL, 3DS7, 3FS0, 3FTM, 3GCA, 3GER, 406D, 413D, 420D, 430D, 433D

bound-RNA (127)

1A9N, 1B23, 1DFU, 1DI2, 1E7K, 1EC6, 1EFW, 1F7V, 1F7Y, 1FEU, 1G1X, 1GAX, 1H3E, 1H4S, 1I6U, 1IL2, 1J1U, 1JID, 1K8W, 1LNG, 1M5O, 1MJI, 1MZP, 1 N35, 1OOA, 1Q2R, 1QA6, 1QF6, 1QRS, 1QU2, 1R3E, 1R9F, 1RPU, 1S03, 1S72, 1SER, 1TFW, 1U0B, 1URN, 1VFG, 1ZBH, 2ANN, 2AZ2, 2AZX, 2B3J, 2BGG, 2BH2, 2BTE, 2CSX, 2CV1, 2DLC, 2DR8, 2DU3, 2E9T, 2F8K, 2F8S, 2FMT, 2HW8, 2I82, 2NUG, 2NZ4, 2OZB, 2PJP, 2PXV, 2QUX, 2RFK, 2VPL, 2XD0, 2Y8Y, 2ZI0, 2ZJR, 2ZM5, 2ZZM, 3A6P, 3ADD, 3AKZ, 3 AM1, 3AMT, 3AVX, 3BSO, 3CUN, 3DH3, 3EGZ, 3EPH, 3EQT, 3FTF, 3HAX, 3HHN, 3HJW, 3IAB, 3KFU, 3KMQ, 3KS8, 3 L25, 3LRR, 3MOJ, 3MQK, 3NCU, 3NVI, 3OIN, 3OL8, 3OVA, 3QRP, 3R2D, 3R9X, 3RW6, 3SIU, 3SNP, 3TMI, 3TS2, 3UCZ, 3UMY, 3V2F, 3V7E, 3VJR, 4AL5, 4AQ7, 4ATO, 4AY2, 4ERD, 4FVU, 4GCW, 4GD2, 4GHA, 4GHL, 4HXH, 4IG8,

DNA (76)

118D, 126D, 137D, 138D, 158D, 160D, 196D, 1D13, 1D23, 1D49, 1D56, 1D57, 1D79, 1D8G, 1 DC0, 1DNZ, 1DOU, 1EHV, 1EN3, 1EN9, 1ENN, 1IKK, 1 M77, 1P4Z, 1S23, 1SGS, 1SK5, 1VJ4, 1WQY, 1XJX, 1XJY, 1ZEX, 1ZEY, 1ZF0, 1ZF1, 1ZF5, 1ZF6, 1ZF7, 1ZF8, 1ZF9, 1ZFA, 1ZFB, 1ZFC, 1ZFF, 1ZFG, 220D, 221D, 240D, 243D, 260D, 2A7E, 2B1B, 2D94, 2D95, 307D, 317D, 348D, 349D, 368D, 369D, 370D, 371D, 395D, 396D, 399D, 414D, 423D, 431D, 441D, 463D, 476D, 477D, 5DNB, 7BNA, 9BNA, 9DNA