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Protein

Particulate methane monooxygenase beta subunit

Gene

pmoA1

more
Organism
Methylococcus capsulatus (strain ATCC 33009 / NCIMB 11132 / Bath)
Status
Reviewed-Annotation score: -Experimental evidence at protein leveli

Functioni

Non-catalytic subunit of the methane monooxygenase that is responsible for the initial oxygenation of methane to methanol in methanotrophs. At least in vitro, specific quinols can replace NADH as reductants.2 Publications

Miscellaneous

Products of both gene copies, pmoA1 and pmoA2, are required for full cellular activity.

Catalytic activityi

Methane + quinol + O2 = methanol + quinone + H2O.1 Publication

Kineticsi

Kinetic parameters have been established with the pMMO heteromeric complex.
    1. Vmax=24.2 nmol/min/mg enzyme (with NADH as reductant)1 Publication
    2. Vmax=4.4 nmol/min/mg enzyme (with decyl-plastoquinol as reductant)1 Publication
    3. Vmax=2.9 nmol/min/mg enzyme (with duroquinol as reductant)1 Publication

    GO - Molecular functioni

    • methane monooxygenase activity Source: JCVI

    GO - Biological processi

    Keywordsi

    Molecular functionMonooxygenase, Oxidoreductase

    Enzyme and pathway databases

    BioCyciMetaCyc:MONOMER-3881
    BRENDAi1.14.18.3 3305

    Names & Taxonomyi

    Protein namesi
    Recommended name:
    Particulate methane monooxygenase beta subunit (EC:1.14.18.3)
    Alternative name(s):
    Methane monooxygenase A subunit
    Particulate methane monooxygenase 27 kDa subunit
    Particulate methane monooxygenase hydroxylase 26 kDa subunit
    Particulate methane monooxygenase hydroxylase beta subunit
    Short name:
    pMMO-H beta subunit
    Gene namesi
    Name:pmoA1
    Synonyms:pmoA
    Ordered Locus Names:MCA1797
    AND
    Name:pmoA2
    Ordered Locus Names:MCA2854
    OrganismiMethylococcus capsulatus (strain ATCC 33009 / NCIMB 11132 / Bath)
    Taxonomic identifieri243233 [NCBI]
    Taxonomic lineageiBacteriaProteobacteriaGammaproteobacteriaMethylococcalesMethylococcaceaeMethylococcus
    Proteomesi
    • UP000006821 Componenti: Chromosome

    Subcellular locationi

    Topology

    Feature keyPosition(s)DescriptionActionsGraphical viewLength
    Transmembranei23 – 43HelicalSequence analysisAdd BLAST21
    Transmembranei59 – 79HelicalSequence analysisAdd BLAST21
    Transmembranei86 – 106HelicalSequence analysisAdd BLAST21
    Transmembranei111 – 131HelicalSequence analysisAdd BLAST21
    Transmembranei145 – 165HelicalSequence analysisAdd BLAST21
    Transmembranei215 – 235HelicalSequence analysisAdd BLAST21

    GO - Cellular componenti

    Keywords - Cellular componenti

    Membrane

    PTM / Processingi

    Molecule processing

    Feature keyPosition(s)DescriptionActionsGraphical viewLength
    ChainiPRO_00004191311 – 247Particulate methane monooxygenase beta subunitAdd BLAST247

    Interactioni

    Subunit structurei

    M.capsulatus has two forms of methane monooxygenase, a soluble (sMMO) and a membrane-bound (particulate) type (pMMO). The particulate type is a nonamer composed of three alpha:beta:gamma heterotrimeric protomers assembled into a cylindrical structure; the beta and gamma subunits comprise the bulk of the membrane-spanning regions and the soluble regions are derived primarily from alpha subunits which form two antiparallel beta-barrel-like structures each. This assembly, also called pMMO hydroxylase (pMMO-H), is proposed to associate with methanol dehydrogenase (MDH), also designated as pMMO-R, to form the pMMO-C complex which seems to have greater methane monooxygenase activity.6 Publications

    Protein-protein interaction databases

    STRINGi243233.MCA2854

    Structurei

    Secondary structure

    1247
    Legend: HelixTurnBeta strandPDB Structure known for this area
    Show more details

    3D structure databases

    ProteinModelPortaliQ607G3
    SMRiQ607G3
    ModBaseiSearch...
    MobiDBiSearch...

    Miscellaneous databases

    EvolutionaryTraceiQ607G3

    Family & Domainsi

    Keywords - Domaini

    Transmembrane, Transmembrane helix

    Phylogenomic databases

    eggNOGiENOG4105E7Z Bacteria
    ENOG4110CTU LUCA
    HOGENOMiHOG000029228
    KOiK10944
    OMAiDWKDRQW
    OrthoDBiPOG091H1JD3

    Family and domain databases

    Gene3Di1.20.1450.10, 1 hit
    InterProiView protein in InterPro
    IPR037001 NH3/CH4_mOase_suA_sf
    IPR003393 NH3_CH4_mOase_A
    PfamiView protein in Pfam
    PF02461 AMO, 1 hit
    TIGRFAMsiTIGR03080 CH4_NH3mon_ox_A, 1 hit

    Sequencei

    Sequence statusi: Complete.

    Q607G3-1 [UniParc]FASTAAdd to basket
    « Hide
            10         20         30         40         50
    MSAAQSAVRS HAEAVQVSRT IDWMALFVVF FVIVGSYHIH AMLTMGDWDF
    60 70 80 90 100
    WSDWKDRRLW VTVTPIVLVT FPAAVQSYLW ERYRLPWGAT VCVLGLLLGE
    110 120 130 140 150
    WINRYFNFWG WTYFPINFVF PASLVPGAII LDTVLMLSGS YLFTAIVGAM
    160 170 180 190 200
    GWGLIFYPGN WPIIAPLHVP VEYNGMLMSI ADIQGYNYVR TGTPEYIRMV
    210 220 230 240
    EKGTLRTFGK DVAPVSAFFS AFMSILIYFM WHFIGRWFSN ERFLQST
    Length:247
    Mass (Da):28,425
    Last modified:November 23, 2004 - v1
    Checksum:i3341AA1A46A53F8F
    GO

    Experimental Info

    Feature keyPosition(s)DescriptionActionsGraphical viewLength
    Sequence conflicti17Missing AA sequence (PubMed:9525893).Curated1
    Sequence conflicti173Y → N (PubMed:7768803).Curated1
    Sequence conflicti173Y → N in AAB49821 (PubMed:10376840).Curated1

    Sequence databases

    Select the link destinations:
    EMBLi
    GenBanki
    DDBJi
    Links Updated
    L40804 Genomic DNA Translation: AAB49821.1
    U94337 Genomic DNA Translation: AAB51065.1
    AE017282 Genomic DNA Translation: AAU91114.1
    AE017282 Genomic DNA Translation: AAU92182.1
    RefSeqiWP_010961050.1, NC_002977.6

    Genome annotation databases

    EnsemblBacteriaiAAU91114; AAU91114; MCA2854
    AAU92182; AAU92182; MCA1797
    KEGGimca:MCA1797
    mca:MCA2854

    Similar proteinsi

    Cross-referencesi

    Sequence databases

    Select the link destinations:
    EMBLi
    GenBanki
    DDBJi
    Links Updated
    L40804 Genomic DNA Translation: AAB49821.1
    U94337 Genomic DNA Translation: AAB51065.1
    AE017282 Genomic DNA Translation: AAU91114.1
    AE017282 Genomic DNA Translation: AAU92182.1
    RefSeqiWP_010961050.1, NC_002977.6

    3D structure databases

    Select the link destinations:
    PDBei
    RCSB PDBi
    PDBji
    Links Updated
    PDB entryMethodResolution (Å)ChainPositionsPDBsum
    1YEWX-ray2.80B/F/J1-247[»]
    3RGBX-ray2.80B/F/J1-247[»]
    ProteinModelPortaliQ607G3
    SMRiQ607G3
    ModBaseiSearch...
    MobiDBiSearch...

    Protein-protein interaction databases

    STRINGi243233.MCA2854

    Protocols and materials databases

    Structural Biology KnowledgebaseSearch...

    Genome annotation databases

    EnsemblBacteriaiAAU91114; AAU91114; MCA2854
    AAU92182; AAU92182; MCA1797
    KEGGimca:MCA1797
    mca:MCA2854

    Phylogenomic databases

    eggNOGiENOG4105E7Z Bacteria
    ENOG4110CTU LUCA
    HOGENOMiHOG000029228
    KOiK10944
    OMAiDWKDRQW
    OrthoDBiPOG091H1JD3

    Enzyme and pathway databases

    BioCyciMetaCyc:MONOMER-3881
    BRENDAi1.14.18.3 3305

    Miscellaneous databases

    EvolutionaryTraceiQ607G3

    Family and domain databases

    Gene3Di1.20.1450.10, 1 hit
    InterProiView protein in InterPro
    IPR037001 NH3/CH4_mOase_suA_sf
    IPR003393 NH3_CH4_mOase_A
    PfamiView protein in Pfam
    PF02461 AMO, 1 hit
    TIGRFAMsiTIGR03080 CH4_NH3mon_ox_A, 1 hit
    ProtoNetiSearch...

    Entry informationi

    Entry nameiPMOA_METCA
    AccessioniPrimary (citable) accession number: Q607G3
    Secondary accession number(s): G1U9W5, O05112, Q49103
    Entry historyiIntegrated into UniProtKB/Swiss-Prot: September 5, 2012
    Last sequence update: November 23, 2004
    Last modified: October 10, 2018
    This is version 90 of the entry and version 1 of the sequence. See complete history.
    Entry statusiReviewed (UniProtKB/Swiss-Prot)
    Annotation programProkaryotic Protein Annotation Program

    Miscellaneousi

    Keywords - Technical termi

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

    Documents

    1. PDB cross-references
      Index of Protein Data Bank (PDB) cross-references
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