10. b.49.3 Aminopeptidase/glucanase lid domain Domain of alpha and beta subunits of F1 ATP synthase-like barrel, closed; n=6, S=8; greek-key 1vhe d1vhea1 A:83-91,100-108,109-118,138-142,157-164 1xfo d1xfob1 B:83-91,99-107,111-120,138-143,160-165 1xfo d1xfoc1 C:83-91,99-107,111-120,138-143,160-165 1xfo d1xfoa1 A:83-91,99-107,111-120,138-143,160-165 2gre d2greb1 B:84-92,100-109,111-120,141-146,162-169 2gre d2gren1 N:84-92,100-109,111-120,141-146,162-169 1y0y d1y0ya1 A:83-91,99-107,111-119,139-143,160-165 2gre d2grea1 A:84-92,100-109,111-120,141-146,162-169 1y0r d1y0ra1 A:83-91,99-107,111-119,139-143,160-165 2gre d2greg1 G:84-92,101-109,111-120,141-146,162-169 2gre d2greh1 H:84-92,100-109,111-120,141-146,162-169 1ylo d1yloe1 E:77-85,93-102,104-117,118-127,142-149 1ylo d1yloc1 C:77-85,93-102,104-117,118-127,142-149 2gre d2gref1 F:84-92,101-109,111-120,141-146,162-169 1ylo d1ylof1 F:77-85,93-102,104-117,118-127,142-149 2gre d2grej1 J:84-92,100-109,111-120,141-146,164-169 1ylo d1ylod1 D:77-85,93-102,104-117,118-127,142-149 1ylo d1ylob1 B:77-85,93-102,104-117,118-127,142-149 2gre d2grei1 I:84-92,100-109,111-120,141-146,164-169 2gre d2grel1 L:84-92,100-109,111-120,141-146,164-169 2gre d2gred1 D:84-92,100-109,111-120,141-146,164-169 2gre d2gree1 E:84-92,100-109,111-120,141-146,164-169 2gre d2grek1 K:84-92,101-109,111-120,141-146,162-169 2gre d2greo1 O:84-92,100-109,111-120,141-146,164-169 1ylo d1yloa1 A:77-85,93-102,104-117,118-127,142-149 2gre d2grem1 M:84-92,101-109,111-120,141-146,164-169 2gre d2grec1 C:84-92,100-109,111-120,141-146,164-169 2gre d2grep1 P:84-92,101-109,111-120,141-146,164-169 1xfo d1xfod1 D:83-91,99-107,111-120,138-143,158-165 2fvg d2fvga1 A:75-83,91-98,99-107,124-129,143-150 15. b.58.1 PK beta-barrel domain-like PK beta-barrel domain-like barrel, closed; n=7, S=10; complex topology 1aqf d1aqff1 F:135-143,171-176,179-189,190-198,204-211 1a49 d1a49h1 H:4935-4943,4971-4976,4979-4989,4990-5001,5004-5011 1a5u d1a5uh1 H:4935-4943,4971-4976,4979-4989,4990-5001,5004-5011 1pkl d1pklg1 G:103-111,137-144,147-157,159-167,174-180 1pkl d1pkld1 D:103-111,137-144,147-157,159-167,174-180 1aqf d1aqfg1 G:135-143,170-176,179-189,190-200,204-211 1pkl d1pklc1 C:103-111,137-144,147-157,159-167,174-180 1pkl d1pklb1 B:103-111,137-144,147-157,159-167,174-180 1pkl d1pkla1 A:103-111,137-144,147-157,159-167,174-180 1pkl d1pklf1 F:103-111,137-144,147-157,159-167,174-180 1aqf d1aqfc1 C:135-143,170-176,179-189,190-200,204-211 1pkl d1pkle1 E:103-111,137-144,147-157,159-167,174-180 3e0v d3e0vc1 C:104-111,137-144,147-157,159-167,173-180 3e0v d3e0vd1 D:104-111,137-144,147-157,159-167,173-180 1aqf d1aqfd1 D:136-143,170-176,179-189,190-198,205-211 1pky d1pkya1 A:87-95,119-126,129-139,140-148,154-161 1e0u d1e0ua1 A:87-95,119-126,129-139,140-148,154-161 3e0v d3e0vf1 F:104-111,137-144,147-157,159-167,173-180 1e0u d1e0ub1 B:87-95,119-126,129-139,140-148,154-161 3e0v d3e0va1 A:103-111,137-144,147-157,159-167,173-180 3e0v d3e0vb1 B:104-111,137-144,147-157,159-167,173-180 1e0t d1e0tc1 C:87-95,119-126,129-139,140-148,154-161 1e0u d1e0ud1 D:87-95,119-126,129-139,140-148,154-161 1e0t d1e0td1 D:87-95,119-126,129-139,140-148,154-161 1a5u d1a5ua1 A:135-143,169-176,179-189,190-198,205-210 1e0t d1e0tb1 B:87-95,119-126,129-139,140-148,154-161 1e0t d1e0ta1 A:87-95,119-126,129-139,140-148,154-161 1pky d1pkyd1 D:87-95,119-126,129-139,140-148,154-161 1oru d1orub_ B:65-70,107-114,117-126,159-167,172-182 1pky d1pkyb1 B:87-95,119-126,129-139,140-148,154-161 1a5u d1a5ub1 B:735-743,769-776,779-789,790-800,804-811 1a5u d1a5ug1 G:4335-4343,4370-4376,4379-4389,4390-4398,4405-4410 1a49 d1a49b1 B:735-743,769-776,779-789,790-800,804-811 1aqf d1aqfh1 H:135-143,169-176,179-189,190-198,204-211 1a5u d1a5uf1 F:3735-3743,3770-3776,3779-3789,3790-3798,3804-3810 1aqf d1aqfb1 B:136-143,169-176,179-189,190-200,204-211 1f3x d1f3xg1 G:135-143,169-176,179-189,190-198,204-210 1a5u d1a5uc1 C:1335-1343,1370-1376,1379-1389,1390-1398,1404-1410 1a49 d1a49d1 D:1935-1943,1970-1976,1979-1989,1990-1998,2004-2010 1a3w d1a3wb1 B:105-113,139-146,149-158,162-169,175-182 1a3w d1a3wa1 A:105-113,139-146,149-158,162-169,175-182 1a5u d1a5ud1 D:1935-1943,1970-1976,1979-1989,1990-1998,2004-2010 1f3x d1f3xc1 C:135-143,169-176,179-189,190-199,204-210 1e0u d1e0uc1 C:87-95,119-126,129-139,140-148,154-160 1a49 d1a49f1 F:3735-3743,3769-3776,3779-3789,3790-3798,3804-3810 1a3x d1a3xa1 A:105-113,139-146,149-158,161-169,175-182 1a3x d1a3xb1 B:105-113,139-146,149-158,161-169,175-182 1f3x d1f3xf1 F:137-143,169-176,179-189,190-198,204-210 1f3x d1f3xb1 B:137-143,169-176,179-189,190-198,204-210 1pkn d1pkna1 A:137-143,169-176,179-189,190-199,204-210 1a49 d1a49e1 E:3135-3143,3169-3176,3179-3189,3190-3198,3204-3210 1a5u d1a5ue1 E:3135-3143,3169-3176,3179-3189,3190-3198,3204-3210 2g50 d2g50a1 A:136-143,169-176,179-189,190-201,204-210 2g50 d2g50e1 E:136-143,169-176,179-189,190-201,204-210 2g50 d2g50d1 D:136-143,169-176,179-189,190-201,204-210 2g50 d2g50h1 H:135-143,169-176,179-188,190-201,204-210 2g50 d2g50g1 G:135-142,169-176,179-185,191-200,204-210 16. f.46.1 HlyD-like secretion proteins HlyD-like secretion proteins consists of three domains: beta-barrel (res. 29-38,170-259; scop_cf 50412); barrel-sandwich hybrid (39-72,135-169; scop_sf 51230) and long alpha-hairpin (73-134; scop_cf 46556) 1vf7 d1vf7a_ A:171-180,202-211,219-224,235-244,251-262 1vf7 d1vf7d_ D:171-180,202-211,219-224,235-244,251-260 1vf7 d1vf7j_ J:171-180,202-211,219-224,233-244,251-260 1vf7 d1vf7l_ L:171-180,202-211,219-224,233-244,251-260 1vf7 d1vf7h_ H:171-180,202-211,219-224,235-244,251-261 1vf7 d1vf7c_ C:171-180,202-211,219-224,233-244,251-265 1vf7 d1vf7e_ E:171-180,202-211,219-224,234-244,251-266 1vf7 d1vf7i_ I:171-180,202-211,219-224,233-244,251-260 1vf7 d1vf7b_ B:171-180,202-211,219-224,235-244,251-260 1vf7 d1vf7f_ F:171-180,202-211,219-224,234-244,251-260 1vf7 d1vf7g_ G:171-180,202-211,219-224,234-244,251-261 1t5e d1t5eb_ B:171-180,202-211,219-224,233-244,251-259 1t5e d1t5ee_ E:171-180,202-211,219-224,233-244,251-259 1t5e d1t5ea_ A:171-180,202-211,219-224,233-244,251-259 1t5e d1t5ej_ J:171-180,202-211,219-224,233-244,251-259 1vf7 d1vf7m_ M:171-180,202-211,219-224,235-244,251-259 1t5e d1t5ec_ C:171-180,202-211,219-224,233-244,251-259 1t5e d1t5el_ L:171-180,202-211,219-224,233-244,251-259 1t5e d1t5ei_ I:171-180,202-211,219-224,233-244,251-259 1t5e d1t5em_ M:171-180,202-211,219-224,233-244,251-259 1t5e d1t5ed_ D:171-180,202-211,219-224,233-244,251-259 1t5e d1t5ek_ K:171-180,202-211,219-224,233-244,251-259 1t5e d1t5eg_ G:171-180,202-211,219-224,233-244,251-259 1t5e d1t5eh_ H:171-180,202-211,219-224,233-244,251-259 1t5e d1t5ef_ F:171-180,202-211,219-224,233-244,251-259 17. b.21.1 Virus attachment protein globular domain Virus attachment protein globular domain sandwich, 10 strands in 2 sheets; greek-key 2j1k d2j1km1 M:417-426,473-483,493-502,509-518,528-540 2j1k d2j1kf1 F:417-426,473-483,493-502,509-518,528-540 2j1k d2j1ke1 E:417-426,473-483,493-502,509-518,528-540 2j1k d2j1kn1 N:417-426,473-483,493-502,509-518,528-540 2j2j d2j2je1 E:417-426,473-483,493-502,509-518,528-540 2j1k d2j1kh1 H:417-426,473-483,493-502,509-518,528-540 2j1k d2j1kq1 Q:417-426,473-483,493-502,509-518,528-540 2j1k d2j1ks1 S:417-426,473-483,493-502,509-518,528-540 2j1k d2j1kd1 D:417-426,473-483,493-502,509-518,528-540 2j1k d2j1kc1 C:417-426,473-483,493-502,509-518,528-540 2j2j d2j2jb1 B:417-426,473-483,493-502,509-518,528-540 2j1k d2j1kl1 L:417-426,473-483,493-502,509-518,528-540 2j2j d2j2jd1 D:417-426,473-483,493-502,509-518,528-540 2j2j d2j2ja1 A:417-426,473-483,493-502,509-518,528-540 2j1k d2j1kr1 R:417-426,473-483,493-502,509-518,528-540 2j2j d2j2jc1 C:417-426,473-483,493-502,509-518,528-540 2j2j d2j2jf1 F:417-426,473-483,493-502,509-518,528-540 2j1k d2j1ki1 I:417-426,473-483,493-502,509-518,528-540 1kke d1kkeb2 B:362-370,389-405,409-423,424-432,439-453 1kke d1kkec2 C:363-370,389-405,409-423,424-433,439-453 1p69 d1p69a_ A:462-472,526-535,540-549,555-567,574-586 1uxb d1uxba_ A:242-252,305-314,319-328,334-343,352-364 1kac d1kaca_ A:462-472,526-535,540-549,555-567,574-586 1uxb d1uxbc_ C:242-252,305-314,319-328,334-343,352-364 1uxa d1uxac_ C:242-252,305-314,319-328,334-343,352-364 1uxa d1uxab_ B:242-252,305-314,319-328,334-343,352-364 2j12 d2j12a1 A:242-252,305-314,319-328,334-343,352-364 1uxa d1uxaa_ A:242-252,305-314,319-328,334-343,352-364 1uxe d1uxec_ C:242-252,305-314,319-328,334-343,352-364 1qiu d1qiua1 A:453-463,514-523,528-537,550-559,569-581 1qiu d1qiuc1 C:453-463,514-523,528-537,550-559,569-581 1qiu d1qiuf1 F:453-463,514-523,528-537,550-559,569-581 1qiu d1qiub1 B:453-463,514-523,528-537,550-559,569-581 1nob d1nobb_ B:462-472,526-535,540-549,555-565,574-586 1nob d1nobc_ C:462-472,526-535,540-549,555-565,574-586 1nob d1nobf_ F:462-472,526-535,540-549,555-565,574-586 1p6a d1p6aa_ A:462-472,526-535,540-549,555-565,574-586 1kke d1kkea2 A:363-370,395-405,409-423,424-433,439-453 19. b.44.1 EF-Tu/eEF-1alpha/eIF2-gamma C-terminal domain probably related to the second domain and its superfamiy by a circular permutation ! Elongation factor/aminomethyltransferase common domain barrel, closed; n=6, S=10; greek-key 1g7c d1g7ca2 A:334-346,353-362,363-372,399-405,421-427 1ijf d1ijfa2 A:336-346,354-362,363-372,399-405,421-427 1f60 d1f60a2 A:336-346,354-362,363-372,399-405,421-427 2b7c d2b7ca2 A:336-346,354-362,363-372,399-405,421-427 1d2e d1d2ec2 C:350-360,372-381,382-392,405-411,419-427 1d2e d1d2ea2 A:350-360,372-381,382-392,404-411,418-427 1dg1 d1dg1h2 H:302-312,326-333,334-344,356-363,370-379 1jny d1jnya2 A:324-333,343-350,351-363,384-393,408-415 1d2e d1d2eb2 B:350-360,372-381,382-391,405-411,418-427 1eft d1efta2 A:314-324,337-345,346-355,368-375,382-391 1xb2 d1xb2a2 A:350-360,373-381,382-391,404-411,420-427 1d2e d1d2ed2 D:350-360,374-381,382-391,404-411,418-427 1exm d1exma2 A:314-324,337-345,346-355,368-375,383-391 1zc8 d1zc8y2 Y:314-324,336-345,346-355,369-375,382-391 1ttt d1ttta2 A:314-324,336-345,346-355,369-375,382-391 1ttt d1tttb2 B:314-324,336-345,346-355,369-375,382-391 1wb2 d1wb2d2 D:277-284,295-304,305-313,340-346,353-361 1wb3 d1wb3d2 D:277-284,295-304,305-313,340-346,353-361 1b23 d1b23p2 P:314-324,337-345,346-355,368-375,382-391 1aip d1aipb2 B:314-323,336-345,346-355,365-375,382-391 1r5n d1r5na2 A:558-567,575-584,585-594,617-625,642-648 1ttt d1tttc2 C:314-324,336-345,346-355,368-375,382-391 2pmd d2pmda2 A:327-336,355-362,363-371,376-384,392-402 1ha3 d1ha3b2 B:314-324,337-345,346-355,368-375,383-391 2pmd d2pmdb2 B:327-336,355-362,363-371,376-384,393-402 1aip d1aipa2 A:314-323,336-345,346-355,365-375,382-391 1aip d1aipe2 E:314-323,336-345,346-355,365-375,382-391 1ha3 d1ha3a2 A:314-324,337-345,346-355,368-375,383-391 1tui d1tuib2 B:314-324,336-345,346-355,368-375,382-391 1tui d1tuia2 A:314-324,336-345,346-355,368-375,382-391 2qn6 d2qn6a2 A:327-336,355-362,363-371,376-383,391-402 1tui d1tuic2 C:314-324,336-345,346-355,368-375,382-391 1wb1 d1wb1b2 B:278-284,295-304,305-314,340-345,353-360 1r5o d1r5oa2 A:558-567,575-584,585-594,617-626,642-648 1wb3 d1wb3b2 B:278-284,295-304,309-314,340-345,354-360 2b7b d2b7ba2 A:337-346,353-362,363-371,399-405,420-427 1zun d1zunb2 B:333-343,352-358,359-367,393-399,415-422 1ije d1ijea2 A:337-346,353-362,363-371,399-405,420-427 1r5b d1r5ba2 A:558-567,575-584,585-593,617-626,642-648 25. e.56.1 YaeB-like YaeB-like 2 domains; d1: [beta-barrel (n=6, S=10), similar to the Reductase/isomerase/elongation factor common domain fold (scop_cf 50412), provides homodimerisation interface]; d2: [alpha+beta (disordered)] 1xqb d1xqbb_ B:32-39,55-63,99-108,115-123,133-138 1xqb d1xqba_ A:32-39,55-63,99-108,115-123,133-138 1xqb d1xqba_ A:32-39,55-63,99-108,115-123,128-133 1xqb d1xqbb_ B:32-39,55-63,99-108,115-123,128-133 30. e.35.1 Membrane penetration protein mu1 Membrane penetration protein mu1 4 domains: three intertwined predominately alpha domains and one jelly-roll beta-sandwich 1jmu d1jmu.2 D:375-386,395-407,420-435,440-453,464-473 1jmu d1jmu.3 F:375-386,395-407,420-435,440-453,464-473 35. d.22.1 GFP-like GFP-like beta-sheet folds into a barrel (n=11, S=14) around the central helix 1jc0 d1jc0c_ C:89-101,147-155,159-172,174-189,197-209 2rh7 d2rh7c1 C:90-100,145-154,155-168,170-184,192-203 2rh7 d2rh7a1 A:90-100,145-154,155-168,170-184,192-203 1jby d1jbya_ A:91-101,147-156,159-172,174-188,197-209 1b9c d1b9cb_ B:89-101,146-156,159-172,174-189,197-209 1oxd d1oxda_ A:89-101,148-156,159-172,174-189,197-209 1eml d1emla_ A:91-101,146-156,159-172,174-188,197-209 1f0b d1f0ba_ A:91-101,147-156,159-172,174-188,197-209 1uis d1uisa_ A:87-97,142-151,152-165,167-181,191-206 1uis d1uisb_ B:87-97,142-151,152-165,167-181,191-206 1b9c d1b9cc_ C:89-101,146-156,159-172,174-189,197-209 1b9c d1b9cd_ D:89-101,146-156,159-172,174-189,197-209 1oxe d1oxea_ A:89-101,144-156,159-172,174-189,197-209 1rmp d1rmpa_ A:91-101,146-156,159-172,174-188,197-209 1kyp d1kypa_ A:89-101,147-156,159-172,174-189,197-209 1qyf d1qyfa_ A:89-101,147-156,159-172,174-189,197-209 1g7k d1g7ka_ A:90-100,145-154,155-168,170-184,191-205 1kyr d1kyra_ A:89-101,147-156,159-172,174-189,197-209 1q73 d1q73a_ A:89-101,147-156,159-172,174-189,197-209 1s6z d1s6za_ A:89-101,147-156,159-172,174-189,197-209 1jc0 d1jc0a_ A:89-101,147-156,159-172,174-189,197-209 1jc1 d1jc1a_ A:89-101,147-156,159-172,174-189,197-209 2rh7 d2rh7b1 B:90-100,145-154,155-168,170-184,193-203 2rh7 d2rh7d1 D:90-100,145-154,155-168,170-184,193-203 1g7k d1g7kd_ D:90-100,145-154,155-168,170-184,191-205 1hcj d1hcjc_ C:89-101,147-156,159-172,174-189,197-209 1q4d d1q4da_ A:89-101,147-156,159-172,174-189,197-209 1emc d1emcc_ C:89-101,147-156,159-172,174-189,197-209 1hcj d1hcjd_ D:89-101,147-156,159-172,174-189,197-209 1q4e d1q4ea_ A:89-101,147-156,159-172,174-189,197-209 1g7k d1g7kc_ C:90-100,145-154,155-168,170-184,191-205 1f09 d1f09a_ A:90-101,146-156,159-172,174-189,197-209 1emc d1emcd_ D:89-101,147-156,159-172,174-189,197-209 1rm9 d1rm9a_ A:89-101,144-156,159-172,174-189,197-209 1cv7 d1cv7a_ A:90-101,147-156,159-172,174-189,197-209 1q4c d1q4ca_ A:89-101,147-156,159-172,174-189,197-209 1rmm d1rmma_ A:89-101,147-156,159-172,174-189,197-209 1g7k d1g7kb_ B:90-100,145-154,155-168,170-184,191-205 1hcj d1hcja_ A:89-101,147-156,159-172,174-189,197-209 1gfl d1gflb_ B:89-101,146-156,159-172,174-189,197-209 1emc d1emcb_ B:89-101,147-156,159-172,174-189,197-209 1gfl d1gfla_ A:89-101,146-156,159-172,174-189,197-209 1b9c d1b9ca_ A:89-101,146-156,159-172,174-188,197-209 1mou d1moua_ A:90-100,145-154,155-168,170-184,191-205 1emg d1emga_ A:89-101,147-156,159-172,174-189,197-209 1mov d1mova_ A:90-100,145-154,155-168,170-184,191-205 2yfp d2yfpa_ A:90-101,147-156,159-172,174-189,197-209 1ggx d1ggxa_ A:90-100,145-154,155-168,170-184,191-205 1c4f d1c4fa_ A:89-101,146-156,159-172,174-189,197-209 1emb d1emba_ A:90-101,146-156,159-172,174-189,197-209 1qxt d1qxta_ A:89-101,147-156,159-172,174-188,197-209 1jc0 d1jc0b_ B:89-101,147-156,159-172,174-189,197-209 1emf d1emfa_ A:89-101,146-156,159-172,174-189,197-209 1ggx d1ggxb_ B:90-100,145-154,155-168,170-184,191-205 1ema d1emaa_ A:90-101,147-156,159-172,174-189,197-209 1qyq d1qyqa_ A:89-101,146-156,159-172,174-189,197-209 1jc1 d1jc1b_ B:89-101,146-156,159-172,174-189,197-209 1q4a d1q4aa_ A:89-101,146-156,159-172,174-189,197-209 1qy3 d1qy3a_ A:89-101,147-156,159-172,174-188,197-209 1q4b d1q4ba_ A:89-101,146-156,159-172,174-189,197-209 1kys d1kysa_ A:89-101,147-156,159-172,174-188,197-209 1oxf d1oxfa_ A:89-101,148-156,159-172,174-188,197-209 1myw d1mywa_ A:89-101,146-156,159-172,174-188,197-209 1rmo d1rmoa_ A:89-101,147-156,159-172,174-188,197-209 1kp5 d1kp5b_ B:399-411,456-466,469-482,484-498,507-519 1emc d1emca_ A:89-101,147-156,159-172,174-188,197-209 1jbz d1jbza_ A:89-101,145-156,159-172,174-189,197-209 1hcj d1hcjb_ B:89-101,147-156,159-172,174-188,197-209 1qyo d1qyoa_ A:89-101,147-156,159-172,174-188,197-209 1huy d1huya_ A:89-101,147-156,159-172,174-188,197-209 1eme d1emea_ A:89-101,146-156,159-172,174-188,197-209 1yfp d1yfpb_ B:89-101,147-156,159-172,174-188,197-209 1yfp d1yfpa_ A:89-101,147-156,159-172,174-188,197-209 1emm d1emma_ A:89-101,146-156,159-172,174-188,197-209 2emn d2emna_ A:89-101,146-156,159-172,174-188,197-209 2emd d2emda_ A:89-101,146-156,159-172,174-188,197-209 1h6r d1h6ra_ A:89-101,147-156,159-172,174-188,197-209 1h6r d1h6rb_ B:89-101,147-156,159-172,174-188,197-209 1emk d1emka_ A:89-101,146-156,159-172,174-188,197-209 1xqm d1xqma_ A:87-97,142-151,152-165,167-181,192-206 2emo d2emoa_ A:89-101,146-156,159-172,174-188,197-209 1h6r d1h6rc_ C:89-101,146-156,159-172,174-188,197-209 1jc1 d1jc1c_ C:89-101,146-156,159-172,174-188,198-209 1kp5 d1kp5a_ A:99-111,156-166,169-182,184-198,208-219 1ggx d1ggxc_ C:88-100,145-154,155-168,170-184,191-205 1ggx d1ggxd_ D:88-100,145-154,155-168,170-184,191-205 1bfp d1bfpa_ A:89-101,147-157,158-172,174-189,197-209 1gl4 d1gl4a1 A:484-495,539-548,549-564,572-585,599-615 1h4u d1h4ua1 A:484-495,539-548,549-564,571-585,599-615 36. 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 1mw9 d1mw9x_ X:231-242,265-279,405-418,419-433,455-459 1cy2 d1cy2a_ A:231-242,265-279,405-418,419-433,455-460 1ecl d1ecla_ A:231-242,264-279,405-418,419-433,455-460 1cy9 d1cy9b_ B:231-242,264-279,405-418,419-433,455-460 1cy0 d1cy0a_ A:231-242,264-279,405-418,419-433,455-460 1cyy d1cyyb_ B:231-242,264-279,404-418,419-434,455-459 1d6m d1d6ma_ A:233-241,270-287,417-430,431-445,469-474 1mw8 d1mw8x_ X:231-242,265-279,405-418,419-433,457-472 1cy8 d1cy8a_ A:231-242,265-279,405-418,419-433,457-472 1i7d d1i7da_ A:233-241,270-287,415-429,432-446,471-485 1cy6 d1cy6a_ A:231-242,264-279,405-418,419-433,457-472 1cyy d1cyya_ A:231-242,264-279,405-418,419-433,457-470 1cy4 d1cy4a_ A:231-242,266-279,405-418,419-433,456-460 1cy7 d1cy7a_ A:231-242,266-279,405-418,419-433,455-460 1cy9 d1cy9a_ A:231-242,266-279,404-418,419-434,455-460 1cy1 d1cy1a_ A:231-242,266-279,405-418,419-433,457-472 39. b.43.2 FucI/AraA C-terminal domain-like Reductase/isomerase/elongation factor common domain barrel, closed; n=6, S=10; greek-key 1fui d1fuib1 B:386-392,455-467,469-481,499-507,527-534 1fui d1fuie1 E:386-392,454-467,469-481,499-507,527-534 2ajt d2ajtc1 C:342-349,389-400,401-413,424-431,449-456 2ajt d2ajta1 A:342-349,389-400,401-413,424-431,449-456 2hxg d2hxgb1 B:342-349,389-400,401-413,424-431,449-456 2ajt d2ajtb1 B:342-349,389-400,401-413,424-431,449-456 1fui d1fuid1 D:386-392,454-466,470-482,499-507,527-534 2hxg d2hxga1 A:342-349,388-400,401-413,424-431,449-456 2hxg d2hxgc1 C:342-349,388-400,401-413,424-431,449-456 1fui d1fuif1 F:386-392,454-467,469-482,499-507,527-534 1fui d1fuic1 C:386-392,454-467,469-482,499-507,527-534 1fui d1fuia1 A:386-392,454-467,469-482,499-507,527-534 41. b.152.1 Flagellar hook protein flgE Flagellar hook protein flgE consists of two different domains; d1: [complex fold made of bifurcated beta-sheets]; d2 (inserted into d1): [beta-sandwich; 8 strands in 2 sheets] 1wlg d1wlga_ A:112-120,287-295,297-305,306-314,357-363 1wlg d1wlgb_ B:112-120,287-295,297-305,306-314,357-363