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UniProtKB - P49058 (IMDH_BORBU)

UniProt

P49058 - IMDH_BORBU

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Protein

Inosine-5'-monophosphate dehydrogenase

Gene

guaB

Organism
Borrelia burgdorferi (strain ATCC 35210 / B31 / CIP 102532 / DSM 4680)
Status
Reviewed-Annotation score: Annotation score: 5 out of 5-Experimental evidence at protein leveli

Functioni

Catalyzes the conversion of inosine 5'-phosphate (IMP) to xanthosine 5'-phosphate (XMP), the first committed and rate-limiting step in the de novo synthesis of guanine nucleotides, and therefore plays an important role in the regulation of cell growth. Essential for mouse infection by tick bite and critical for the survival in environments that appear to lack sufficient amounts of guanine, guanosine, and/or deoxyguanosine to support spirochete growth, such as mammalian host tissues.2 Publications

Catalytic activityi

Inosine 5'-phosphate + NAD+ + H2O = xanthosine 5'-phosphate + NADH.1 Publication

Cofactori

K+1 Publication

Enzyme regulationi

Mycophenolic acid (MPA) is a non-competitive inhibitor that prevents formation of the closed enzyme conformation by binding to the same site as the amobile flap. In contrast, mizoribine monophosphate (MZP) is a competitive inhibitor that induces the closed conformation. MPA is a potent inhibitor of mammalian IMPDHs but a poor inhibitor of the bacterial enzymes. MZP is a more potent inhibitor of bacterial IMPDH.By similarity

Kineticsi

  1. KM=29 µM for Inosine 5'-phosphate1 Publication
  2. KM=1100 µM for NAD+1 Publication

    Pathwayi: XMP biosynthesis via de novo pathway

    This protein is involved in step 1 of the subpathway that synthesizes XMP from IMP.1 Publication
    Proteins known to be involved in this subpathway in this organism are:
    1. Inosine-5'-monophosphate dehydrogenase (guaB)
    This subpathway is part of the pathway XMP biosynthesis via de novo pathway, which is itself part of Purine metabolism.
    View all proteins of this organism that are known to be involved in the subpathway that synthesizes XMP from IMP, the pathway XMP biosynthesis via de novo pathway and in Purine metabolism.

    Sites

    Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
    Binding sitei172 – 1721NADBy similarity
    Metal bindingi224 – 2241Potassium; via carbonyl oxygenBy similarity
    Metal bindingi226 – 2261Potassium; via carbonyl oxygenBy similarity
    Binding sitei227 – 2271IMPBy similarity
    Active sitei229 – 2291Thioimidate intermediateBy similarity
    Metal bindingi229 – 2291Potassium; via carbonyl oxygenBy similarity
    Active sitei325 – 3251Proton acceptorBy similarity
    Binding sitei340 – 3401IMPBy similarity
    Metal bindingi394 – 3941Potassium; via carbonyl oxygen; shared with tetrameric partnerBy similarity
    Metal bindingi395 – 3951Potassium; via carbonyl oxygen; shared with tetrameric partnerBy similarity
    Metal bindingi396 – 3961Potassium; via carbonyl oxygen; shared with tetrameric partnerBy similarity

    Regions

    Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
    Nucleotide bindingi222 – 2243NADBy similarity

    GO - Molecular functioni

    GO - Biological processi

    Complete GO annotation...

    Keywords - Molecular functioni

    Oxidoreductase

    Keywords - Biological processi

    GMP biosynthesis, Purine biosynthesis

    Keywords - Ligandi

    Metal-binding, NAD, Potassium

    Enzyme and pathway databases

    BioCyciBBUR224326:G9SO-1498-MONOMER.
    BRENDAi1.1.1.205. 902.
    UniPathwayiUPA00601; UER00295.

    Names & Taxonomyi

    Protein namesi
    Recommended name:
    Inosine-5'-monophosphate dehydrogenase1 Publication (EC:1.1.1.2051 Publication)
    Short name:
    IMP dehydrogenase
    Short name:
    IMPD
    Short name:
    IMPDH1 Publication
    Gene namesi
    Name:guaB1 Publication
    Ordered Locus Names:BB_B17
    Encoded oniPlasmid cp26 (circular 26 kb)0 Publication
    OrganismiBorrelia burgdorferi (strain ATCC 35210 / B31 / CIP 102532 / DSM 4680)
    Taxonomic identifieri224326 [NCBI]
    Taxonomic lineageiBacteria › Spirochaetes › Spirochaetales › Borreliaceae › Borreliella ›
    Proteomesi
    • UP000001807 Componenti: Plasmid cp26

    PTM / Processingi

    Molecule processing

    Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
    Initiator methionineiRemoved1 Publication
    Chaini2 – 404403Inosine-5'-monophosphate dehydrogenasePRO_0000093692Add
    BLAST

    Proteomic databases

    PRIDEiP49058.

    Interactioni

    Subunit structurei

    Homotetramer.1 Publication

    Chemistry

    BindingDBiP49058.

    Structurei

    Secondary structure

    1
    404
    Legend: HelixTurnBeta strand
    Show more details
    Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
    Helixi12 – 143Combined sources
    Beta strandi15 – 173Combined sources
    Helixi26 – 283Combined sources
    Beta strandi33 – 386Combined sources
    Beta strandi40 – 478Combined sources
    Turni51 – 533Combined sources
    Helixi56 – 6510Combined sources
    Beta strandi67 – 715Combined sources
    Beta strandi73 – 753Combined sources
    Helixi77 – 8812Combined sources
    Beta strandi145 – 1484Combined sources
    Helixi154 – 16310Combined sources
    Beta strandi167 – 1715Combined sources
    Helixi179 – 19113Combined sources
    Beta strandi196 – 2027Combined sources
    Helixi205 – 2128Combined sources
    Turni213 – 2153Combined sources
    Beta strandi217 – 2215Combined sources
    Helixi230 – 2356Combined sources
    Helixi241 – 25212Combined sources
    Beta strandi258 – 2636Combined sources
    Helixi268 – 27710Combined sources
    Beta strandi280 – 2845Combined sources
    Helixi286 – 2894Combined sources
    Beta strandi294 – 2963Combined sources
    Beta strandi298 – 3014Combined sources
    Beta strandi304 – 3074Combined sources
    Helixi352 – 37019Combined sources
    Helixi375 – 3806Combined sources
    Beta strandi384 – 3863Combined sources

    3D structure databases

    Select the link destinations:
    PDBei
    RCSB PDBi
    PDBji
    Links Updated
    EntryMethodResolution (Å)ChainPositionsPDBsum
    1EEPX-ray2.40A/B1-404[»]
    ProteinModelPortaliP49058.
    SMRiP49058. Positions 3-389.
    ModBaseiSearch...
    MobiDBiSearch...

    Miscellaneous databases

    EvolutionaryTraceiP49058.

    Family & Domainsi

    Region

    Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
    Regioni262 – 2643IMP bindingBy similarity
    Regioni285 – 2862IMP bindingBy similarity
    Regioni309 – 3135IMP bindingBy similarity

    Sequence similaritiesi

    Belongs to the IMPDH/GMPR family.Curated

    Phylogenomic databases

    KOiK00088.
    OMAiGVNMESY.

    Family and domain databases

    CDDicd00381. IMPDH. 1 hit.
    Gene3Di3.20.20.70. 2 hits.
    InterProiIPR013785. Aldolase_TIM.
    IPR005990. IMP_DH.
    IPR015875. IMP_DH/GMP_Rdtase_CS.
    IPR001093. IMP_DH_GMPRt.
    [Graphical view]
    PANTHERiPTHR11911:SF6. PTHR11911:SF6. 2 hits.
    PfamiPF00478. IMPDH. 1 hit.
    [Graphical view]
    PROSITEiPS00487. IMP_DH_GMP_RED. 1 hit.
    [Graphical view]

    Sequencei

    Sequence statusi: Complete.

    Sequence processingi: The displayed sequence is further processed into a mature form.

    P49058-1 [UniParc]FASTAAdd to basket

    « Hide

            10         20         30         40         50
    MPNKITKEAL TFDDVSLIPR KSSVLPSEVS LKTQLTKNIS LNIPFLSSAM 
            60         70         80         90        100
    DTVTESQMAI AIAKEGGIGI IHKNMSIEAQ RKEIEKVKTY KFQKTINTNG 
           110        120        130        140        150
    DTNEQKPEIF TAKQHLEKSD AYKNAEHKED FPNACKDLNN KLRVGAAVSI 
           160        170        180        190        200
    DIDTIERVEE LVKAHVDILV IDSAHGHSTR IIELIKKIKT KYPNLDLIAG 
           210        220        230        240        250
    NIVTKEAALD LISVGADCLK VGIGPGSICT TRIVAGVGVP QITAICDVYE 
           260        270        280        290        300
    ACNNTNICII ADGGIRFSGD VVKAIAAGAD SVMIGNLFAG TKESPSEEII 
           310        320        330        340        350
    YNGKKFKSYV GMGSISAMKR GSKSRYFQLE NNEPKKLVPE GIEGMVPYSG 
           360        370        380        390        400
    KLKDILTQLK GGLMSGMGYL GAATISDLKI NSKFVKISHS SLKESHPHDV 

    FSIT
    Length:404
    Mass (Da):43,768
    Last modified:February 1, 1996 - v1
    Checksum:iA91D6D6C5CE522F1
    GO

    Sequence databases

    Select the link destinations:
    EMBLi
    GenBanki
    DDBJi
    Links Updated
    		U13372 Genomic DNA. Translation: AAA53247.1.
    AE000792 Genomic DNA. Translation: AAC66314.1.
    PIRiE70218.
    RefSeqiNP_047003.1. NC_001903.1.
    WP_010890582.1. NC_001903.1.

    Genome annotation databases

    EnsemblBacteriaiAAC66314; AAC66314; BB_B17.
    KEGGibbu:BB_B17.
    PATRICi20559101. VBIBorBur75917_1605.

    Cross-referencesi

    Sequence databases

    Select the link destinations:
    EMBLi
    GenBanki
    DDBJi
    Links Updated
    		U13372 Genomic DNA. Translation: AAA53247.1.
    AE000792 Genomic DNA. Translation: AAC66314.1.
    PIRiE70218.
    RefSeqiNP_047003.1. NC_001903.1.
    WP_010890582.1. NC_001903.1.

    3D structure databases

    Select the link destinations:
    PDBei
    RCSB PDBi
    PDBji
    Links Updated
    EntryMethodResolution (Å)ChainPositionsPDBsum
    1EEPX-ray2.40A/B1-404[»]
    ProteinModelPortaliP49058.
    SMRiP49058. Positions 3-389.
    ModBaseiSearch...
    MobiDBiSearch...

    Chemistry

    BindingDBiP49058.

    Proteomic databases

    PRIDEiP49058.

    Protocols and materials databases

    Structural Biology KnowledgebaseSearch...

    Genome annotation databases

    EnsemblBacteriaiAAC66314; AAC66314; BB_B17.
    KEGGibbu:BB_B17.
    PATRICi20559101. VBIBorBur75917_1605.

    Phylogenomic databases

    KOiK00088.
    OMAiGVNMESY.

    Enzyme and pathway databases

    UniPathwayiUPA00601; UER00295.
    BioCyciBBUR224326:G9SO-1498-MONOMER.
    BRENDAi1.1.1.205. 902.

    Miscellaneous databases

    EvolutionaryTraceiP49058.

    Family and domain databases

    CDDicd00381. IMPDH. 1 hit.
    Gene3Di3.20.20.70. 2 hits.
    InterProiIPR013785. Aldolase_TIM.
    IPR005990. IMP_DH.
    IPR015875. IMP_DH/GMP_Rdtase_CS.
    IPR001093. IMP_DH_GMPRt.
    [Graphical view]
    PANTHERiPTHR11911:SF6. PTHR11911:SF6. 2 hits.
    PfamiPF00478. IMPDH. 1 hit.
    [Graphical view]
    PROSITEiPS00487. IMP_DH_GMP_RED. 1 hit.
    [Graphical view]
    ProtoNetiSearch...

    Entry informationi

    Entry nameiIMDH_BORBU
    AccessioniPrimary (citable) accession number: P49058
    Entry historyi
    Integrated into UniProtKB/Swiss-Prot: February 1, 1996
    Last sequence update: February 1, 1996
    Last modified: September 7, 2016
    This is version 123 of the entry and version 1 of the sequence. [Complete history]
    Entry statusiReviewed (UniProtKB/Swiss-Prot)
    Annotation programProkaryotic Protein Annotation Program

    Miscellaneousi

    Keywords - Technical termi

    3D-structure, Complete proteome, Direct protein sequencing, Plasmid, Reference proteome

    Documents

    1. PATHWAY comments
      Index of metabolic and biosynthesis pathways
    2. PDB cross-references
      Index of Protein Data Bank (PDB) cross-references
    3. SIMILARITY comments
      Index of protein domains and families

    Similar proteinsi

    Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
    100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into one UniRef entry.
    90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
    50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.