Superfamily: Tetrahydrobiopterin biosynthesis enzymes-like

bind purine or pterin in topologically similar sites between subunits
uperfamily

Lineage:

1. Root: scop
2. Class: Alpha and beta proteins (a+b) [53931]
   Mainly antiparallel beta sheets (segregated alpha and beta regions)
3. Fold: T-fold [55619]
   beta(2)-alpha(2)-beta(2); 2 layers: alpha/beta; antiparallel sheet 1234
   tunnel-shaped: its known members form wide oligomeric barrels different sizes
4. Superfamily: Tetrahydrobiopterin biosynthesis enzymes-like [55620]
   bind purine or pterin in topologically similar sites between subunits
   uperfamily

Families:

1. GTP cyclohydrolase I [55621] (4)
   1. GTP cyclohydrolase I [55622]
      beta-sheets of five subunits form a barrel, closed: n=20, S=20
      1. Escherichia coli [TaxId: 562] [55623] (7)
      2. Human (Homo sapiens) [TaxId: 9606] [55624] (1)
      3. Rat (Rattus norvegicus) [TaxId: 10116] [69790] (3)
         SQ P22288
      4. Thermus thermophilus [TaxId: 274] [143627] (15)
         SQ Q5SH52 32-216
2. 6-pyruvoyl tetrahydropterin synthase [55625] (4)
   1. 6-pyruvoyl tetrahydropterin synthase [55626]
      beta-sheets of three subunits form a barrel, closed: n=12, S=12
      1. Rat (Rattus norvegicus) [TaxId: 10116] [55627] (3)
      2. Plasmodium falciparum [TaxId: 5833] [118057] (1)
         SQ Q6LEZ4
      3. Caenorhabditis elegans [TaxId: 6239] [143628] (1)
         SQ O02058 1-139
      4. Plasmodium vivax [TaxId: 5855] [143629] (2)
         73% similarity to the Plasmodium falciparum enzyme
3. DHN aldolase/epimerase [55628] (4)
   beta-sheets of four subunits form a barrel, closed: n=16, S=16
   1. 7,8-dihydroneopterin aldolase [55629]
      1. Staphylococcus aureus [TaxId: 1280] [55630] (15)
         SQ P56740
      2. Bacteria (Mycobacterium tuberculosis) [TaxId: 1773] [103143] (2)
         SQ O06275 2-115
      3. Thale cress (Arabidopsis thaliana) [TaxId: 3702] [111088] (1)
         SQ Q9SF23
   2. 7,8-dihydroneopterin triphosphate epimerase [55631]
      1. Escherichia coli [TaxId: 562] [55632] (1)
4. Urate oxidase (uricase) [55633] (3)
   1. Urate oxidase (uricase) [55634]
      duplication: one subunit consists of two domains of this fold; beta-sheets of two subunits form a barrel, closed: n=16, S=16
      1. Aspergillus flavus [TaxId: 5059] [55635] (72)
      2. Bacillus sp., strain TB-90 [TaxId: 1409] [111089] (1)
         SQ Q45697 177-482
      3. Arthrobacter globiformis [TaxId: 1665] [143630] (96)

Generated from scop database 1.75 with scopm 1.101 on Wed Jun 3 10:42:06 2009 Copyright © 1994-2009 The scop authors / scop@mrc-lmb.cam.ac.uk