Protein loops on structural similar scaffold
Loops with variable sequences and structures on structurally similar protein scaffold are common in Protein Data Bank. This page provides a loop family database which is built by searching the FSSP and PDB.

Every loop family in this database contains sequentially variable loops rooting on well-superimposed regular secondary structures. Because this database is based on the searching of all PDB entries. Therefore it gives much information of structural diversity of loops in homologous protein families. However, this kind of information are always excluded by the previous studies based on a non-redundant PDB set.

The structural features and sequential patterns are examined in each family. The loops are clustered into conformational sub-families by average linkage cluster analysis method. The motivation of this database is to provide the structural diversity information of each loop family and some relationship between structure of loop and its sequence. I hope this database may give helpful suggestion to loop modelling.

See this document for more information and some definition

Note: This is the first release of the database. Some part of it is still under construction. And regular update is planned. So modification of this page may take place later, and new data will be added.

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Now you can browse the database by click the entry in the table below !

Name Type Representative Members Name Type Representative Members
2aa0 alpha-alpha 1cdg_231 5 2ab0 alpha-beta 1qor-A_151 5
2ab1 alpha-beta 1xaa_55 13 2ab2 alpha-beta 1opg-H_29 7
2ab3 alpha-beta 1cms_300 8 2ba0 beta-alpha 3chy_32 5
2ba1 beta-alpha 1vid_82 5 2bb0 beta-beta 1ten_66 10
2bb1 beta-beta 1try_23 9 2bb10 beta-beta 3rp2-A_185 6
2bb2 beta-beta 1ldm_285 7 2bb3 beta-beta 1ifc_112 6
2bb4 beta-beta 1hsb-B_36 6 2bb5 beta-beta 1mct-A_23 5
2bb6 beta-beta 1poa_69 5 2bb7 beta-beta 1msa-A_15 6
2bb8 beta-beta 1ldm_205 5 2bb9 beta-beta 1psn_196 5
3aa0 alpha-alpha 1pdn-C_35 13 3aa1 alpha-alpha 1hyh-A_142 6
3aa2 alpha-alpha 1cdg_300 6 3ab0 alpha-beta 2ts1_46 56
3ab2 alpha-beta 2nad-A_227 6 3ab3 alpha-beta 4enl_382 6
3ab4 alpha-beta 2ohx-A_306 5 3ab1 alpha-beta 1tpv-B_77 24
3ba0 beta-alpha 1ldm_22 9 3ba1 beta-alpha 1dih_74 6
3ba2 beta-alpha 1imb-A_185 6 3ba3 beta-alpha 1opg-H_18 5
3ba4 beta-alpha 1cms_121 5 3bb0 beta-beta 1mlb-A_45 14
3bb1 beta-beta 1thm_202 6 3bb2 beta-beta 1thm_209 6
4aa0 alpha-alpha 1lzr_90 9 4aa1 alpha-alpha 1lzr_81 6
4ab0 alpha-beta 8abp_42 31 4ab1 alpha-beta 1ldm_106 7
4ab2 alpha-beta 1grg_13 7 4ab3 alpha-beta 2ebn_145 9
4ab4 alpha-beta 3eca-A_226 8 4ab5 alpha-beta 1hyh-A_218 5
4ba0 beta-alpha 1mlb-A_70 25 4ba1 beta-alpha 1erv_23 5
4ba2 beta-alpha 1cms_165 6 4ba3 beta-alpha 1cdg_197 6
4ba4 beta-alpha 1ldm_132 5 4ba5 beta-alpha 1dpg-A_6 5
4ba6 beta-alpha 2aaa_175 6 4bb0 beta-beta 1opg-H_68 16
4bb1 beta-beta 1smr-A_314 8 4bb2 beta-beta 1plc_69 6
4bb3 beta-beta 1ifc_46 6 4bb4 beta-beta 1mlb-A_129 11
4bb5 beta-beta 1lzr_51 8 4bb6 beta-beta 1cdg_508 5
4bb7 beta-beta 3rp2-A_27 5 5ab0 alpha-beta 1pda_53 8
5bb0 beta-beta 1mlb-A_10 17 5bb1 beta-beta 1opg-H_34 10
5bb2 beta-beta 1hsb-A_234 5 5bb3 beta-beta 1psn_238 5
6aa0 alpha-alpha 1bab-A_97 6 6ab0 alpha-beta 1rro_40 5
6ba0 beta-alpha 1eft_11 10 6ba1 beta-alpha 1ldm_296 5
6ba2 beta-alpha 2aaa_226 5 6bb0 beta-beta 1mlb-A_84 14
6bb1 beta-beta 1mlb-A_33 12 7ab0 alpha-beta 1rro_79 8
7ab1 alpha-beta 1erv_63 5 7ab2 alpha-beta 3cms_138 5
7bb0 beta-beta 1mlb-A_19 15 7bb1 beta-beta 1mlb-A_53 15
7bb2 beta-beta 1hsb-B_78 6 7bb3 beta-beta 1nsc-A_285 6
8bb0 beta-beta 1try_5 15 9ba0 beta-alpha 1thm_97 6
10bb0 beta-beta 2cbd_188 17 10bb1 beta-beta 2cbd_86 6
11ba0 beta-alpha 1lvl_196 5 11bb0 beta-beta 1brh-A_68 5
13aa0 alpha-alpha 1ycc_76 11 13bb0 beta-beta 9rnt_40 5