1. d.131.1 DNA clamp
DNA clamp contains two helices and two beta sheets ! duplication: fold has internal pseudo two-fold symmetry
1b77 d1b77c1 C:4-19,19-25,27-33,37-44,213-220
1b77 d1b77a1 A:4-19,19-25,27-33,37-44,213-220
1b8h d1b8hc1 C:4-19,19-26,28-33,37-43,213-220
1b8h d1b8hb1 B:4-19,19-27,28-33,37-43,213-220
1czd d1czda1 A:1004-1019,1019-1026,1028-1033,1037-1043,1213-1220
1b77 d1b77b1 B:4-19,19-27,28-33,37-43,213-220
1czd d1czdc1 C:3004-3019,3019-3027,3028-3033,3037-3043,3213-3220
1czd d1czdb1 B:2004-2019,2019-2027,2028-2033,2037-2043,2213-2220
1b8h d1b8ha1 A:4-19,19-24,28-33,37-43,213-220
2. e.10.1 Prokaryotic type I DNA topoisomerase duplication: the protein chain passing through the domains 2-4 makes two structural repeats ! The active site is formed by the toprim and "winged helix" domains (domains 1 and 4); these two domains are also found in the type II topoisomerase (DNA gyrase A) and in the alpha subunit of topoisomerase IV !
Prokaryotic type I DNA topoisomerase 4 domains: (1) Toprim alpha/beta; (2&4) "winged helix"-like; (3) barrel: n=6, S=8
1gl9 d1gl9b3 B:58-71,72-77,526-533,534-543,544-553
1gl9 d1gl9c3 C:58-71,72-77,526-533,534-543,544-553
3. c.1.8 (Trans)glycosidases
TIM beta/alpha-barrel contains parallel beta-sheet barrel, closed; n=8, S=8; strand order 12345678 ! the first seven superfamilies have similar phosphate-binding sites
1we5 d1we5c4 C:520-535,535-540,607-611,613-618,659-665
List of motif hits that are not present in SCOP but are found in PDB for pattern ID: 888 (enumeration index: query20) of S5
3ifv A:7-23,24-28,32-40,44-53,233-242
2ztz B:1-15,22-30,98-106,147-154,155-166
2p3e A:2-9,10-15,35-40,286-302,365-376
2p3e B:2-9,10-15,35-40,286-302,365-376
3oum A:145-157,177-184,199-206,208-215,218-223
3pkv A:145-157,177-184,199-206,208-215,218-222
3oul A:145-157,177-184,199-206,208-215,218-223
2zu1 B:1-15,22-30,98-106,147-154,155-166
2ztx A:1-15,22-30,98-106,148-154,155-166
1yby B:98-105,107-117,127-136,170-177,178-185