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PDBsum entry 1dcs

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Oxidoreductase PDB id
1dcs

 

 

 

 

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Contents
Protein chain
279 a.a. *
Ligands
SO4 ×2
Waters ×260
* Residue conservation analysis
PDB id:
1dcs
Name: Oxidoreductase
Title: Deacetoxycephalosporin c synthase from s. Clavuligerus
Structure: Deacetoxycephalosporin c synthase. Chain: a. Synonym: ring expanding enzyme, ring expandase. Engineered: yes
Source: Streptomyces clavuligerus. Organism_taxid: 1901. Expressed in: escherichia coli. Expression_system_taxid: 562.
Biol. unit: Trimer (from PQS)
Resolution:
1.30Å     R-factor:   0.129     R-free:   0.150
Authors: K.Valegard,A.C.Terwisscha Van Scheltinga,M.D.Lloyd,T.Hara, S.Ramaswamy,A.Perrakis,A.Thompson,H.J.Lee,J.E.Baldwin,C.J.Schofield, J.Hajdu,I.Andersson
Key ref:
K.Valegård et al. (1998). Structure of a cephalosporin synthase. Nature, 394, 805-809. PubMed id: 9723623 DOI: 10.1038/29575
Date:
05-Jun-98     Release date:   08-Jun-99    
PROCHECK
Go to PROCHECK summary
 Headers
 References

Protein chain
Pfam   ArchSchema ?
P18548  (CEFE_STRCL) -  Deacetoxycephalosporin C synthase from Streptomyces clavuligerus
Seq:
Struc:
311 a.a.
279 a.a.
Key:    PfamA domain  Secondary structure  CATH domain

 Enzyme reactions 
   Enzyme class: E.C.1.14.20.1  - deacetoxycephalosporin-C synthase.
[IntEnz]   [ExPASy]   [KEGG]   [BRENDA]

      Pathway:
Penicillin N and Deacetoxycephalosporin C Biosynthesis
      Reaction: penicillin N + 2-oxoglutarate + O2 = deacetoxycephalosporin C + succinate + CO2 + H2O
penicillin N
+ 2-oxoglutarate
+ O2
= deacetoxycephalosporin C
+ succinate
+ CO2
+ H2O
Molecule diagrams generated from .mol files obtained from the KEGG ftp site

 

 
    reference    
 
 
DOI no: 10.1038/29575 Nature 394:805-809 (1998)
PubMed id: 9723623  
 
 
Structure of a cephalosporin synthase.
K.Valegård, A.C.van Scheltinga, M.D.Lloyd, T.Hara, S.Ramaswamy, A.Perrakis, A.Thompson, H.J.Lee, J.E.Baldwin, C.J.Schofield, J.Hajdu, I.Andersson.
 
  ABSTRACT  
 
Penicillins and cephalosporins are among the most widely used therapeutic agents. These antibiotics are produced from fermentation-derived materials as their chemical synthesis is not commercially viable. Unconventional steps in their biosynthesis are catalysed by Fe(II)-dependent oxidases/oxygenases; isopenicillin N synthase (IPNS) creates in one step the bicyclic nucleus of penicillins, and deacetoxycephalosporin C synthase (DAOCS) catalyses the expansion of the penicillin nucleus into the nucleus of cephalosporins. Both enzymes use dioxygen-derived ferryl intermediates in catalysis but, in contrast to IPNS, the ferryl form of DAOCS is produced by the oxidative splitting of a co-substrate, 2-oxoglutarate (alpha-ketoglutarate). This route of controlled ferryl formation and reaction is common to many mononuclear ferrous enzymes, which participate in a broader range of reactions than their well-characterized counterparts, the haem enzymes. Here we report the first crystal structure of a 2-oxoacid-dependent oxygenase. High-resolution structures for apo-DAOCS, the enzyme complexed with Fe(II), and with Fe(II) and 2-oxoglutarate, were obtained from merohedrally twinned crystals. Using a model based on these structures, we propose a mechanism for ferryl formation.
 
  Selected figure(s)  
 
Figure 1.
Figure 1 Scheme to show the key steps in the biosynthesis of penicillins and cephalosporins.
Figure 2.
Figure 2 Comparison of the structures of deacetoxycephalosporin C synthase (DAOCS) and isopenicillin N synthase (IPNS). DAOCS (a) is a 2-oxoacid-dependent enzyme, whereas IPNS (b) is not. The two sequences show only 19% identity. Major departures from the IPNS structure can be found in the amino-terminal loop, in the region between residues 272 and 292 where two strands and a helix are inserted, in the active site and its environment, and at the C-terminal arm (highlighted in red in DAOCS).
 
  The above figures are reprinted by permission from Macmillan Publishers Ltd: Nature (1998, 394, 805-809) copyright 1998.  
  Figures were selected by an automated process.  

Literature references that cite this PDB file's key reference

  PubMed id Reference
20728359 C.Loenarz, and C.J.Schofield (2011).
Physiological and biochemical aspects of hydroxylations and demethylations catalyzed by human 2-oxoglutarate oxygenases.
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21166655 L.G.Bjørnstad, G.Zoppellaro, A.B.Tomter, P.Ã.˜.Falnes, and K.K.Andersson (2011).
Spectroscopic and magnetic studies of wild-type and mutant forms of the Fe(II)- and 2-oxoglutarate-dependent decarboxylase ALKBH4.
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20121095 C.T.Walsh, and M.A.Fischbach (2010).
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20660778 D.Khare, B.Wang, L.Gu, J.Razelun, D.H.Sherman, W.H.Gerwick, K.Håkansson, and J.L.Smith (2010).
Conformational switch triggered by alpha-ketoglutarate in a halogenase of curacin A biosynthesis.
  Proc Natl Acad Sci U S A, 107, 14099-14104.
PDB codes: 3nnf 3nnj 3nnl 3nnm
20840591 E.Flashman, L.M.Hoffart, R.B.Hamed, J.M.Bollinger, C.Krebs, and C.J.Schofield (2010).
Evidence for the slow reaction of hypoxia-inducible factor prolyl hydroxylase 2 with oxygen.
  FEBS J, 277, 4089-4099.  
21209891 F.Dahmani-Mardas, C.Troadec, A.Boualem, S.Lévêque, A.A.Alsadon, A.A.Aldoss, C.Dogimont, and A.Bendahmane (2010).
Engineering melon plants with improved fruit shelf life using the TILLING approach.
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20498719 K.Reuter, M.Pittelkow, J.Bursy, A.Heine, T.Craan, and E.Bremer (2010).
Synthesis of 5-hydroxyectoine from ectoine: crystal structure of the non-heme iron(II) and 2-oxoglutarate-dependent dioxygenase EctD.
  PLoS One, 5, e10647.
PDB code: 3emr
19947658 M.A.Culpepper, E.E.Scott, and J.Limburg (2010).
Crystal structure of prolyl 4-hydroxylase from Bacillus anthracis.
  Biochemistry, 49, 124-133.
PDB code: 3itq
19058272 E.M.Nolan, and C.T.Walsh (2009).
How nature morphs peptide scaffolds into antibiotics.
  Chembiochem, 10, 34-53.  
18277980 E.G.Kovaleva, and J.D.Lipscomb (2008).
Versatility of biological non-heme Fe(II) centers in oxygen activation reactions.
  Nat Chem Biol, 4, 186-193.  
18083859 K.S.Goo, C.S.Chua, and T.S.Sim (2008).
Relevant double mutations in bioengineered Streptomyces clavuligerus deacetoxycephalosporin C synthase result in higher binding specificities which improve penicillin bioconversion.
  Appl Environ Microbiol, 74, 1167-1175.  
17729280 K.Sim Goo, C.Song Chua, and T.S.Sim (2008).
A complete library of amino acid alterations at R306 in Streptomyces clavuligerus deacetoxycephalosporin C synthase demonstrates its structural role in the ring-expansion activity.
  Proteins, 70, 739-747.  
18838806 K.Watanabe (2008).
Exploring the biosynthesis of natural products and their inherent suitability for the rational design of desirable compounds through genetic engineering.
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19020684 P.C.Bruijnincx, G.van Koten, and R.J.Klein Gebbink (2008).
Mononuclear non-heme iron enzymes with the 2-His-1-carboxylate facial triad: recent developments in enzymology and modeling studies.
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17390002 D.Hoffmeister, and N.P.Keller (2007).
Natural products of filamentous fungi: enzymes, genes, and their regulation.
  Nat Prod Rep, 24, 393-416.  
17967013 M.L.Neidig, C.D.Brown, K.M.Light, D.G.Fujimori, E.M.Nolan, J.C.Price, E.W.Barr, J.M.Bollinger, C.Krebs, C.T.Walsh, and E.I.Solomon (2007).
CD and MCD of CytC3 and taurine dioxygenase: role of the facial triad in alpha-KG-dependent oxygenases.
  J Am Chem Soc, 129, 14224-14231.  
17991826 T.Gerken, C.A.Girard, Y.C.Tung, C.J.Webby, V.Saudek, K.S.Hewitson, G.S.Yeo, M.A.McDonough, S.Cunliffe, L.A.McNeill, J.Galvanovskis, P.Rorsman, P.Robins, X.Prieur, A.P.Coll, M.Ma, Z.Jovanovic, I.S.Farooqi, B.Sedgwick, I.Barroso, T.Lindahl, C.P.Ponting, F.M.Ashcroft, S.O'Rahilly, and C.J.Schofield (2007).
The obesity-associated FTO gene encodes a 2-oxoglutarate-dependent nucleic acid demethylase.
  Science, 318, 1469-1472.  
17431691 V.Purpero, and G.R.Moran (2007).
The diverse and pervasive chemistries of the alpha-keto acid dependent enzymes.
  J Biol Inorg Chem, 12, 587-601.  
16702218 J.Nakajima, Y.Sato, T.Hoshino, M.Yamazaki, and K.Saito (2006).
Mechanistic study on the oxidation of anthocyanidin synthase by quantum mechanical calculation.
  J Biol Chem, 281, 21387-21398.  
16320009 K.D.Koehntop, S.Marimanikkuppam, M.J.Ryle, R.P.Hausinger, and L.Que (2006).
Self-hydroxylation of taurine/alpha-ketoglutarate dioxygenase: evidence for more than one oxygen activation mechanism.
  J Biol Inorg Chem, 11, 63-72.  
16782814 M.A.McDonough, V.Li, E.Flashman, R.Chowdhury, C.Mohr, B.M.Liénard, J.Zondlo, N.J.Oldham, I.J.Clifton, J.Lewis, L.A.McNeill, R.J.Kurzeja, K.S.Hewitson, E.Yang, S.Jordan, R.S.Syed, and C.J.Schofield (2006).
Cellular oxygen sensing: Crystal structure of hypoxia-inducible factor prolyl hydroxylase (PHD2).
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PDB codes: 2g19 2g1m
16790931 R.C.Hillig, and L.Renault (2006).
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  Acta Crystallogr D Biol Crystallogr, 62, 750-765.
PDB code: 2ca6
16731970 T.A.Müller, M.I.Zavodszky, M.Feig, L.A.Kuhn, and R.P.Hausinger (2006).
Structural basis for the enantiospecificities of R- and S-specific phenoxypropionate/alpha-ketoglutarate dioxygenases.
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  16511070 E.Bitto, C.A.Bingman, S.T.Allard, G.E.Wesenberg, D.J.Aceti, R.L.Wrobel, R.O.Frederick, H.Sreenath, F.C.Vojtik, W.B.Jeon, C.S.Newman, J.Primm, M.R.Sussman, B.G.Fox, J.L.Markley, and G.N.Phillips (2005).
The structure at 2.4 A resolution of the protein from gene locus At3g21360, a putative Fe(II)/2-oxoglutarate-dependent enzyme from Arabidopsis thaliana.
  Acta Crystallogr Sect F Struct Biol Cryst Commun, 61, 469-472.
PDB code: 1y0z
15739104 K.D.Koehntop, J.P.Emerson, and L.Que (2005).
The 2-His-1-carboxylate facial triad: a versatile platform for dioxygen activation by mononuclear non-heme iron(II) enzymes.
  J Biol Inorg Chem, 10, 87-93.  
16880998 L.A.McNeill, E.Flashman, M.R.Buck, K.S.Hewitson, I.J.Clifton, G.Jeschke, T.D.Claridge, D.Ehrismann, N.J.Oldham, and C.J.Schofield (2005).
Hypoxia-inducible factor prolyl hydroxylase 2 has a high affinity for ferrous iron and 2-oxoglutarate.
  Mol Biosyst, 1, 321-324.  
16186124 M.A.McDonough, K.L.Kavanagh, D.Butler, T.Searls, U.Oppermann, and C.J.Schofield (2005).
Structure of human phytanoyl-CoA 2-hydroxylase identifies molecular mechanisms of Refsum disease.
  J Biol Chem, 280, 41101-41110.
PDB code: 2a1x
16317455 M.L.Neidig, and E.I.Solomon (2005).
Structure-function correlations in oxygen activating non-heme iron enzymes.
  Chem Commun (Camb), (), 5843-5863.  
16113715 N.J.Kershaw, M.E.Caines, M.C.Sleeman, and C.J.Schofield (2005).
The enzymology of clavam and carbapenem biosynthesis.
  Chem Commun (Camb), (), 4251-4263.  
16116277 S.H.Park, M.Nakajima, M.Sakane, Z.J.Xu, K.Tomioka, and I.Yamaguchi (2005).
Gibberellin 2-oxidases from seedlings of adzuki bean (Vigna angularis) show high gibberellin-binding activity in the presence of 2-oxoglutarate and Co2+.
  Biosci Biotechnol Biochem, 69, 1498-1507.  
15858272 T.R.Barends, R.M.de Jong, K.E.van Straaten, A.M.Thunnissen, and B.W.Dijkstra (2005).
Escherichia coli MltA: MAD phasing and refinement of a tetartohedrally twinned protein crystal structure.
  Acta Crystallogr D Biol Crystallogr, 61, 613-621.  
15869968 X.B.Wu, K.Q.Fan, Q.H.Wang, and K.Q.Yang (2005).
C-terminus mutations of Acremonium chrysogenum deacetoxy/deacetylcephalosporin C synthase with improved activity toward penicillin analogs.
  FEMS Microbiol Lett, 246, 103-110.  
15122348 C.J.Schofield, and P.J.Ratcliffe (2004).
Oxygen sensing by HIF hydroxylases.
  Nat Rev Mol Cell Biol, 5, 343-354.  
15134335 E.Metzen, and P.J.Ratcliffe (2004).
HIF hydroxylation and cellular oxygen sensing.
  Biol Chem, 385, 223-230.  
14718929 K.Valegård, A.C.Terwisscha van Scheltinga, A.Dubus, G.Ranghino, L.M.Oster, J.Hajdu, and I.Andersson (2004).
The structural basis of cephalosporin formation in a mononuclear ferrous enzyme.
  Nat Struct Mol Biol, 11, 95.
PDB codes: 1unb 1uo9 1uob 1uof 1uog
14734549 M.D.Lloyd, S.J.Lipscomb, K.S.Hewitson, C.M.Hensgens, J.E.Baldwin, and C.J.Schofield (2004).
Controlling the substrate selectivity of deacetoxycephalosporin/deacetylcephalosporin C synthase.
  J Biol Chem, 279, 15420-15426.  
15489165 Z.Zhang, J.S.Ren, I.J.Clifton, and C.J.Schofield (2004).
Crystal structure and mechanistic implications of 1-aminocyclopropane-1-carboxylic acid oxidase--the ethylene-forming enzyme.
  Chem Biol, 11, 1383-1394.
PDB codes: 1w9y 1wa6
14573957 A.C.Terwisscha van Scheltinga, K.Valegård, J.Hajdu, and I.Andersson (2003).
MIR phasing using merohedrally twinned crystals.
  Acta Crystallogr D Biol Crystallogr, 59, 2017-2022.  
12676714 C.L.Wei, Y.B.Yang, W.C.Wang, W.C.Liu, J.S.Hsu, and Y.C.Tsai (2003).
Engineering Streptomyces clavuligerus deacetoxycephalosporin C synthase for optimal ring expansion activity toward penicillin G.
  Appl Environ Microbiol, 69, 2306-2312.  
12482756 C.Lee, S.J.Kim, D.G.Jeong, S.M.Lee, and S.E.Ryu (2003).
Structure of human FIH-1 reveals a unique active site pocket and interaction sites for HIF-1 and von Hippel-Lindau.
  J Biol Chem, 278, 7558-7563.
PDB code: 1iz3
12631288 H.J.Lee, Y.F.Dai, C.Y.Shiau, C.J.Schofield, and M.D.Lloyd (2003).
The kinetic properties of various R258 mutants of deacetoxycephalosporin C synthase.
  Eur J Biochem, 270, 1301-1307.  
12642663 M.J.Ryle, K.D.Koehntop, A.Liu, L.Que, and R.P.Hausinger (2003).
Interconversion of two oxidized forms of taurine/alpha-ketoglutarate dioxygenase, a non-heme iron hydroxylase: evidence for bicarbonate binding.
  Proc Natl Acad Sci U S A, 100, 3790-3795.  
12814641 M.Mukherji, C.J.Schofield, A.S.Wierzbicki, G.A.Jansen, R.J.Wanders, and M.D.Lloyd (2003).
The chemical biology of branched-chain lipid metabolism.
  Prog Lipid Res, 42, 359-376.  
12594517 P.A.Aas, M.Otterlei, P.O.Falnes, C.B.Vågbø, F.Skorpen, M.Akbari, O.Sundheim, M.Bjørås, G.Slupphaug, E.Seeberg, and H.E.Krokan (2003).
Human and bacterial oxidative demethylases repair alkylation damage in both RNA and DNA.
  Nature, 421, 859-863.  
14529267 P.Liu, A.Liu, F.Yan, M.D.Wolfe, J.D.Lipscomb, and H.W.Liu (2003).
Biochemical and spectroscopic studies on (S)-2-hydroxypropylphosphonic acid epoxidase: a novel mononuclear non-heme iron enzyme.
  Biochemistry, 42, 11577-11586.  
12161433 A.K.White, and W.W.Metcalf (2002).
Isolation and biochemical characterization of hypophosphite/2-oxoglutarate dioxygenase. A novel phosphorus-oxidizing enzyme from Psuedomonas stutzeri WM88.
  J Biol Chem, 277, 38262-38271.  
11976489 A.Royant, S.Grizot, R.Kahn, H.Belrhali, F.Fieschi, E.M.Landau, and E.Pebay-Peyroula (2002).
Detection and characterization of merohedral twinning in two protein crystals: bacteriorhodopsin and p67(phox).
  Acta Crystallogr D Biol Crystallogr, 58, 784-791.  
12432100 C.E.Dann, R.K.Bruick, and J.Deisenhofer (2002).
Structure of factor-inhibiting hypoxia-inducible factor 1: An asparaginyl hydroxylase involved in the hypoxic response pathway.
  Proc Natl Acad Sci U S A, 99, 15351-15356.
PDB codes: 1mze 1mzf
11914506 C.M.Hensgens, E.A.Kroezinga, B.A.van Montfort, J.M.van der Laan, J.D.Sutherland, and B.W.Dijkstra (2002).
Purification, crystallization and preliminary X-ray diffraction of Cys103Ala acyl coenzyme A: isopenicillin N acyltransferase from Penicillium chrysogenum.
  Acta Crystallogr D Biol Crystallogr, 58, 716-718.  
12080085 D.Lando, D.J.Peet, J.J.Gorman, D.A.Whelan, M.L.Whitelaw, and R.K.Bruick (2002).
FIH-1 is an asparaginyl hydroxylase enzyme that regulates the transcriptional activity of hypoxia-inducible factor.
  Genes Dev, 16, 1466-1471.  
12180990 F.Wellmann, R.Lukacin, T.Moriguchi, L.Britsch, E.Schiltz, and U.Matern (2002).
Functional expression and mutational analysis of flavonol synthase from Citrus unshiu.
  Eur J Biochem, 269, 4134-4142.  
12142814 H.M.Hanauske-Abel, A.Popowicz, H.Remotti, R.S.Newfield, and J.Levy (2002).
Tyrosinemia I, a model for human diseases mediated by 2-oxoacid-utilizing dioxygenases: hepatotoxin suppression by NTBC does not normalize hepatic collagen metabolism.
  J Pediatr Gastroenterol Nutr, 35, 73-78.  
12146944 J.C.Dunning Hotopp, and R.P.Hausinger (2002).
Probing the 2,4-dichlorophenoxyacetate/alpha-ketoglutarate dioxygenase substrate-binding site by site-directed mutagenesis and mechanism-based inactivation.
  Biochemistry, 41, 9787-9794.  
11910018 M.R.Chance, A.R.Bresnick, S.K.Burley, J.S.Jiang, C.D.Lima, A.Sali, S.C.Almo, J.B.Bonanno, J.A.Buglino, S.Boulton, H.Chen, N.Eswar, G.He, R.Huang, V.Ilyin, L.McMahan, U.Pieper, S.Ray, M.Vidal, and L.K.Wang (2002).
Structural genomics: a pipeline for providing structures for the biologist.
  Protein Sci, 11, 723-738.
PDB code: 1jr7
11976332 R.Hieta, and J.Myllyharju (2002).
Cloning and characterization of a low molecular weight prolyl 4-hydroxylase from Arabidopsis thaliana. Effective hydroxylation of proline-rich, collagen-like, and hypoxia-inducible transcription factor alpha-like peptides.
  J Biol Chem, 277, 23965-23971.  
12047382 S.J.Lipscomb, H.J.Lee, M.Mukherji, J.E.Baldwin, C.J.Schofield, and M.D.Lloyd (2002).
The role of arginine residues in substrate binding and catalysis by deacetoxycephalosporin C synthase.
  Eur J Biochem, 269, 2735-2739.  
11717489 A.C.Terwisscha van Scheltinga, K.Valegård, S.Ramaswamy, J.Hajdu, and I.Andersson (2001).
Multiple isomorphous replacement on merohedral twins: structure determination of deacetoxycephalosporin C synthase.
  Acta Crystallogr D Biol Crystallogr, 57, 1776-1785.  
11134927 C.Contreras-Martel, J.Martinez-Oyanedel, M.Bunster, P.Legrand, C.Piras, X.Vernede, and J.C.Fontecilla-Camps (2001).
Crystallization and 2.2 A resolution structure of R-phycoerythrin from Gracilaria chilensis: a case of perfect hemihedral twinning.
  Acta Crystallogr D Biol Crystallogr, 57, 52-60.
PDB code: 1eyx
11737217 I.J.Clifton, L.C.Hsueh, J.E.Baldwin, K.Harlos, and C.J.Schofield (2001).
Structure of proline 3-hydroxylase. Evolution of the family of 2-oxoglutarate dependent oxygenases.
  Eur J Biochem, 268, 6625-6636.
PDB codes: 1e5r 1e5s
11395407 J.A.Gerlt, and P.C.Babbitt (2001).
Divergent evolution of enzymatic function: mechanistically diverse superfamilies and functionally distinct suprafamilies.
  Annu Rev Biochem, 70, 209-246.  
11223521 J.J.Turnbull, A.G.Prescott, C.J.Schofield, and R.C.Wilmouth (2001).
Purification, crystallization and preliminary X-ray diffraction of anthocyanidin synthase from Arabidopsis thaliana.
  Acta Crystallogr D Biol Crystallogr, 57, 425-427.  
11755401 J.M.Ogle, I.J.Clifton, P.J.Rutledge, J.M.Elkins, N.I.Burzlaff, R.M.Adlington, P.L.Roach, and J.E.Baldwin (2001).
Alternative oxidation by isopenicillin N synthase observed by X-ray diffraction.
  Chem Biol, 8, 1231-1237.
PDB codes: 1hb1 1hb2 1hb3 1hb4
  11276424 L.Aravind, and E.V.Koonin (2001).
The DNA-repair protein AlkB, EGL-9, and leprecan define new families of 2-oxoglutarate- and iron-dependent dioxygenases.
  Genome Biol, 2, RESEARCH0007.  
10777523 D.A.Hogan, S.R.Smith, E.A.Saari, J.McCracken, and R.P.Hausinger (2000).
Site-directed mutagenesis of 2,4-dichlorophenoxyacetic acid/alpha-ketoglutarate dioxygenase. Identification of residues involved in metallocenter formation and substrate binding.
  J Biol Chem, 275, 12400-12409.  
10944332 F.Yang, Z.Dauter, and A.Wlodawer (2000).
Effects of crystal twinning on the ability to solve a macromolecular structure using multiwavelength anomalous diffraction.
  Acta Crystallogr D Biol Crystallogr, 56, 959-964.  
10830499 J.Sim, and T.S.Sim (2000).
Mutational evidence supporting the involvement of tripartite residues His183, Asp185, and His243 in Streptomyces clavuligerus deacetoxycephalosporin C synthase for catalysis.
  Biosci Biotechnol Biochem, 64, 828-832.  
10913275 N.Khaleeli, R.W.Busby, and C.A.Townsend (2000).
Site-directed mutagenesis and biochemical analysis of the endogenous ligands in the ferrous active site of clavaminate synthase. The His-3 variant of the 2-His-1-carboxylate model.
  Biochemistry, 39, 8666-8673.  
10651823 R.Lukacin, I.Gröning, U.Pieper, and U.Matern (2000).
Site-directed mutagenesis of the active site serine290 in flavanone 3beta-hydroxylase from Petunia hybrida.
  Eur J Biochem, 267, 853-860.  
10393920 A.M.Rocklin, D.L.Tierney, V.Kofman, N.M.Brunhuber, B.M.Hoffman, R.E.Christoffersen, N.O.Reich, J.D.Lipscomb, and L.Que (1999).
Role of the nonheme Fe(II) center in the biosynthesis of the plant hormone ethylene.
  Proc Natl Acad Sci U S A, 96, 7905-7909.  
10607676 C.J.Schofield, and Z.Zhang (1999).
Structural and mechanistic studies on 2-oxoglutarate-dependent oxygenases and related enzymes.
  Curr Opin Struct Biol, 9, 722-731.  
10417727 D.R.Lester, J.J.Ross, J.J.Smith, R.C.Elliott, and J.B.Reid (1999).
Gibberellin 2-oxidation and the SLN gene of Pisum sativum.
  Plant J, 19, 65-73.  
10531525 N.Chandra, K.R.Acharya, and P.C.Moody (1999).
Analysis and characterization of data from twinned crystals.
  Acta Crystallogr D Biol Crystallogr, 55, 1750-1758.  
10200325 S.G.Thomas, A.L.Phillips, and P.Hedden (1999).
Molecular cloning and functional expression of gibberellin 2- oxidases, multifunctional enzymes involved in gibberellin deactivation.
  Proc Natl Acad Sci U S A, 96, 4698-4703.  
10449319 S.W.May (1999).
Applications of oxidoreductases.
  Curr Opin Biotechnol, 10, 370-375.  
  10473412 T.Shibasaki, H.Mori, S.Chiba, and A.Ozaki (1999).
Microbial proline 4-hydroxylase screening and gene cloning.
  Appl Environ Microbiol, 65, 4028-4031.  
10417408 U.Mueller, Y.A.Muller, R.Herbst-Irmer, M.Sprinzl, and U.Heinemann (1999).
Disorder and twin refinement of RNA heptamer double helices.
  Acta Crystallogr D Biol Crystallogr, 55, 1405-1413.
PDB codes: 464d 466d
The most recent references are shown first. Citation data come partly from CiteXplore and partly from an automated harvesting procedure. Note that this is likely to be only a partial list as not all journals are covered by either method. However, we are continually building up the citation data so more and more references will be included with time. Where a reference describes a PDB structure, the PDB codes are shown on the right.

 

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