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PDBsum entry 2wk1

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protein ligands links
Transferase PDB id
2wk1
Jmol
Contents
Protein chain
242 a.a. *
Ligands
SAH
SO4 ×2
EDO ×2
Waters ×242
* Residue conservation analysis
PDB id:
2wk1
Name: Transferase
Title: Structure of the o-methyltransferase novp
Structure: Novp. Chain: a. Synonym: o-methyltransferase novp. Engineered: yes. Other_details: disulphide bridge between cys228 and cys231
Source: Streptomyces caeruleus. Streptomyces spheroides. Organism_taxid: 195949. Atcc: ncib 11891. Expressed in: escherichia coli. Expression_system_taxid: 469008.
Resolution:
1.40Å     R-factor:   0.146     R-free:   0.163
Authors: I.Gomez Garcia,C.E.M.Stevenson,I.Uson,C.L.Freel Meyers, C.T.Walsh,D.M.Lawson
Key ref: I.Gómez García et al. (2010). The crystal structure of the novobiocin biosynthetic enzyme NovP: the first representative structure for the TylF O-methyltransferase superfamily. J Mol Biol, 395, 390-407. PubMed id: 19857499
Date:
03-Jun-09     Release date:   15-Dec-09    
PROCHECK
Go to PROCHECK summary
 Headers
 References

Protein chain
Pfam   ArchSchema ?
Q9L9F2  (Q9L9F2_STRSH) -  Demethyldecarbamoylnovobiocin O-methyltransferase
Seq:
Struc:
262 a.a.
242 a.a.
Key:    PfamA domain  Secondary structure

 Enzyme reactions 
   Enzyme class: E.C.2.1.1.285  - Demethyldecarbamoylnovobiocin O-methyltransferase.
[IntEnz]   [ExPASy]   [KEGG]   [BRENDA]
      Reaction: S-adenosyl-L-methionine + demethyldecarbamoylnovobiocin = S-adenosyl-L- homocysteine + decarbamoylnovobiocin
S-adenosyl-L-methionine
+ demethyldecarbamoylnovobiocin
= S-adenosyl-L- homocysteine
+ decarbamoylnovobiocin
Molecule diagrams generated from .mol files obtained from the KEGG ftp site
 Gene Ontology (GO) functional annotation 
  GO annot!
  Biological process     methylation   3 terms 
  Biochemical function     transferase activity     3 terms  

 

 
    Added reference    
 
 
J Mol Biol 395:390-407 (2010)
PubMed id: 19857499  
 
 
The crystal structure of the novobiocin biosynthetic enzyme NovP: the first representative structure for the TylF O-methyltransferase superfamily.
I.Gómez García, C.E.Stevenson, I.Usón, C.L.Freel Meyers, C.T.Walsh, D.M.Lawson.
 
  ABSTRACT  
 
NovP is an S-adenosyl-l-methionine-dependent O-methyltransferase that catalyzes the penultimate step in the biosynthesis of the aminocoumarin antibiotic novobiocin. Specifically, it methylates at 4-OH of the noviose moiety, and the resultant methoxy group is important for the potency of the mature antibiotic: previous crystallographic studies have shown that this group interacts directly with the target enzyme DNA gyrase, which is a validated drug target. We have determined the high-resolution crystal structure of NovP from Streptomyces spheroides as a binary complex with its desmethylated cosubstrate S-adenosyl-l-homocysteine. The structure displays a typical class I methyltransferase fold, in addition to motifs that are consistent with a divalent-metal-dependent mechanism. This is the first representative structure of a methyltransferase from the TylF superfamily, which includes a number of enzymes implicated in the biosynthesis of antibiotics and other therapeutics. The NovP structure reveals a number of distinctive structural features that, based on sequence conservation, are likely to be characteristic of the superfamily. These include a helical 'lid' region that gates access to the cosubstrate binding pocket and an active center that contains a 3-Asp putative metal binding site. A further conserved Asp likely acts as the general base that initiates the reaction by deprotonating the 4-OH group of the noviose unit. Using in silico docking, we have generated models of the enzyme-substrate complex that are consistent with the proposed mechanism. Furthermore, these models suggest that NovP is unlikely to tolerate significant modifications at the noviose moiety, but could show increasing substrate promiscuity as a function of the distance of the modification from the methylation site. These observations could inform future attempts to utilize NovP for methylating a range of glycosylated compounds.