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The Open Protein Structure Annotation Network
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3i09

    Table of contents
    1. 1. Protein Summary
    2. 2. Ligand Summary

    Title Crystal structure of Periplasmic Binding Protein BMA293 (YP_104442.1) from Burkholderia mallei ATCC 23344 at 1.80 A resolution. To be published
    Site JCSG
    PDB Id 3i09 Target Id
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    Molecular Characteristics
    Source
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    Alias Ids
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    TPS25855,YP_104442.1, BIG_798, 332887
    Molecular Weight
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    Da.
    Residues
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    Isoelectric Point
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    Sequence
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      BLAST   FFAS

    Structure Determination
    Method XRAY
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    Chains 2
    Resolution (Å)
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    Rfree
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    Matthews' coefficent 2.11 Rfactor 0.137
    Waters
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    Solvent Content 41.73

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    Ligand Information
    Ligands
    Metals

    Jmol

     
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    Google Scholar output for 3i09

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    Protein Summary

    Gene BMA2936 from Burkholderia mallei atcc 23344 encodes the YP_104442 protein belonging to the ANF receptor ligand binding group (PF01094). Based on its genome context, BMA2936 could be a periplasmic amino acid binding domain of an ABC transporter. This protein is now in family PF01094.21 ANF_receptor CL0144.

    Pre-SCOP classifies 3i09 in the alpha/beta class, periplasmic binding protein-like I superfamily, L-arabionse binding protein-like family. 3i09 structure is highly similar to 1pea with 86% of SSM and 1z17 with 83%. fastSCOP top hit is 1qo0 with an e-value of 1e-77, whereas Dali top Z-scores are 42.2 for 1pea and 41.5 for 1qo0. FATCAT scores 830 with 1qo0. All three structures consist of two domains that fold into a closed conformation upon ligand binding.

     

    Figure 1. 3i09 monomer structure

    Picture1.png

     

     

    The protein is annotated as a branched amino acid binding protein; however, an acetoacetic acid (AAE) is present in the active site. This protein lacks an acidic residue for interaction with the amino group of a free aa. Suggesting: 1). this is a branch aa binding domain but also it has affinity for AAE; 2). 3i09 binds AAE or similar ligands (but not branched aa).


    Figure 2. AAE and its interacting residues in 3i09 structure. The AAE is also shown in density (blue)

    Picture2.png

    Ligand Summary

    Reviews

    References

     

    No references found.

    Tag page

    Files (2)

    FileSizeDateAttached by 
     Picture1.png
    396165 monomer
    299.05 kB17:27, 27 Apr 2009qxuActions
     Picture2.png
    substrate binding site
    161.56 kB17:27, 27 Apr 2009qxuActions
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