6EWJ

Putative sugar aminotransferase Spr1654 from Streptococcus pneumoniae, apo-form


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.236 
  • R-Value Observed: 0.238 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

Structural and functional studies of Spr1654: an essential aminotransferase in teichoic acid biosynthesis inStreptococcus pneumoniae.

Han, X.Sun, R.Sandalova, T.Achour, A.

(2018) Open Biol 8

  • DOI: 10.1098/rsob.170248
  • Primary Citation of Related Structures:  
    6EWJ, 6EWQ, 6EWR

  • PubMed Abstract: 
  • Spr1654 from Streptococcus pneumoniae plays a key role in the production of unusual sugars, presumably functioning as a pyridoxal-5'-phosphate (PLP)-dependent aminotransferase. Spr1654 was predicted to catalyse the transferring of amino group to form the amino sugar 2-acetamido-4-amino-2, 4, 6-trideoxygalactose moiety (AATGal), representing a crucial step in biosynthesis of teichoic acids in S ...

    Spr1654 from Streptococcus pneumoniae plays a key role in the production of unusual sugars, presumably functioning as a pyridoxal-5'-phosphate (PLP)-dependent aminotransferase. Spr1654 was predicted to catalyse the transferring of amino group to form the amino sugar 2-acetamido-4-amino-2, 4, 6-trideoxygalactose moiety (AATGal), representing a crucial step in biosynthesis of teichoic acids in S. pneumoniae We have determined the crystal structures of the apo-, PLP- and PMP-bound forms of Spr1654. Spr1654 forms a homodimer, in which each monomer contains one active site. Using spectrophotometry and based on absorbance profiles of PLP- and PMP-formed enzymes, our results indicate that l-glutamate is most likely the preferred amino donor. Structural superposition of the crystal structures of Spr1654 on previously determined structures of other sugar aminotransferases in complex with glutamate and/or UDP-activated sugar allowed us to identify key Spr1654 residues for ligand binding and catalysis. The crystal structures of Spr1654 and in complex with PLP and PMP can direct the future rational design of novel therapeutic compounds against S. pneumoniae .


    Organizational Affiliation

    Division of Infectious Diseases, Karolinska University Hospital, Solna, 17176 Stockholm, Sweden.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Putative capsular polysaccharide biosynthesis proteinA,
D [auth B],
C,
B [auth D]
427Streptococcus pneumoniae TIGR4Mutation(s): 0 
Gene Names: SP_1837Spr1654
UniProt
Find proteins for A0A0H2URM1 (Streptococcus pneumoniae serotype 4 (strain ATCC BAA-334 / TIGR4))
Explore A0A0H2URM1 
Go to UniProtKB:  A0A0H2URM1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A0H2URM1
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.236 
  • R-Value Observed: 0.238 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 79.33α = 90
b = 99.982β = 97.66
c = 110.422γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-05-02
    Type: Initial release