ID   QOX2_STAAB              Reviewed;         366 AA.
AC   Q2YX14;
DT   06-FEB-2007, integrated into UniProtKB/Swiss-Prot.
DT   20-DEC-2005, sequence version 1.
DT   25-MAY-2022, entry version 106.
DE   RecName: Full=Probable quinol oxidase subunit 2;
DE            EC=1.10.3.-;
DE   AltName: Full=Quinol oxidase polypeptide II;
DE   Flags: Precursor;
GN   Name=qoxA; OrderedLocusNames=SAB0927c;
OS   Staphylococcus aureus (strain bovine RF122 / ET3-1).
OC   Bacteria; Firmicutes; Bacilli; Bacillales; Staphylococcaceae;
OC   Staphylococcus.
OX   NCBI_TaxID=273036;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=bovine RF122 / ET3-1;
RX   PubMed=17971880; DOI=10.1371/journal.pone.0001120;
RA   Herron-Olson L., Fitzgerald J.R., Musser J.M., Kapur V.;
RT   "Molecular correlates of host specialization in Staphylococcus aureus.";
RL   PLoS ONE 2:E1120-E1120(2007).
CC   -!- FUNCTION: Catalyzes quinol oxidation with the concomitant reduction of
CC       oxygen to water. Subunit II transfers the electrons from a quinol to
CC       the binuclear center of the catalytic subunit I (By similarity).
CC       {ECO:0000250}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=2 a quinol + O2 = 2 a quinone + 2 H2O; Xref=Rhea:RHEA:55376,
CC         ChEBI:CHEBI:15377, ChEBI:CHEBI:15379, ChEBI:CHEBI:24646,
CC         ChEBI:CHEBI:132124;
CC   -!- SUBCELLULAR LOCATION: Cell membrane {ECO:0000255|PROSITE-
CC       ProRule:PRU00303}; Multi-pass membrane protein {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the cytochrome c oxidase subunit 2 family.
CC       {ECO:0000305}.
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DR   EMBL; AJ938182; CAI80615.1; -; Genomic_DNA.
DR   RefSeq; WP_000032837.1; NC_007622.1.
DR   AlphaFoldDB; Q2YX14; -.
DR   SMR; Q2YX14; -.
DR   KEGG; sab:SAB0927c; -.
DR   HOGENOM; CLU_036876_6_0_9; -.
DR   OMA; TAMNSFF; -.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0005886; C:plasma membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0070469; C:respirasome; IEA:UniProtKB-KW.
DR   GO; GO:0005507; F:copper ion binding; IEA:InterPro.
DR   GO; GO:0009486; F:cytochrome bo3 ubiquinol oxidase activity; IEA:InterPro.
DR   GO; GO:0004129; F:cytochrome-c oxidase activity; IEA:InterPro.
DR   GO; GO:0016682; F:oxidoreductase activity, acting on diphenols and related substances as donors, oxygen as acceptor; IEA:InterPro.
DR   CDD; cd04212; CuRO_UO_II; 1.
DR   Gene3D; 1.10.287.90; -; 1.
DR   Gene3D; 2.60.40.420; -; 1.
DR   InterPro; IPR045187; CcO_II.
DR   InterPro; IPR002429; CcO_II-like_C.
DR   InterPro; IPR008972; Cupredoxin.
DR   InterPro; IPR034227; CuRO_UO_II.
DR   InterPro; IPR011759; Cyt_c_oxidase_su2_TM_dom.
DR   InterPro; IPR036257; Cyt_c_oxidase_su2_TM_sf.
DR   InterPro; IPR006332; QoxA.
DR   PANTHER; PTHR22888; PTHR22888; 1.
DR   Pfam; PF00116; COX2; 1.
DR   Pfam; PF02790; COX2_TM; 1.
DR   SUPFAM; SSF49503; SSF49503; 1.
DR   SUPFAM; SSF81464; SSF81464; 1.
DR   TIGRFAMs; TIGR01432; QOXA; 1.
DR   PROSITE; PS50857; COX2_CUA; 1.
DR   PROSITE; PS50999; COX2_TM; 1.
DR   PROSITE; PS51257; PROKAR_LIPOPROTEIN; 1.
PE   3: Inferred from homology;
KW   Cell membrane; Electron transport; Lipoprotein; Membrane; Oxidoreductase;
KW   Palmitate; Respiratory chain; Signal; Transmembrane; Transmembrane helix;
KW   Transport.
FT   SIGNAL          1..19
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00303"
FT   CHAIN           20..366
FT                   /note="Probable quinol oxidase subunit 2"
FT                   /id="PRO_0000275871"
FT   TRANSMEM        38..58
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        80..100
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   REGION          330..366
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        332..366
FT                   /note="Basic and acidic residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   LIPID           20
FT                   /note="N-palmitoyl cysteine"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00303"
FT   LIPID           20
FT                   /note="S-diacylglycerol cysteine"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00303"
SQ   SEQUENCE   366 AA;  41791 MW;  D3200CE93A7A406F CRC64;
     MSKFKSLLLL FGTLILLSGC SNIEIFNAKG PVASSQKFLI LYSIVFMLVI CFVVLGMFAI
     FIYKYSYNKN AESGKMHHNA IIETIWFVIP IIIVAALAIP TVKTLYDYEK PPKSEKDPMV
     VYAVSAGYKW FFAYPDEHIE TVNTLTIPKD RPVVFKLQAM DTMTSFWIPQ LGGQKYAMTG
     MTMNWTLEAS QTGTFRGRNS NFNGEGFSRQ TFKVNAVSQK DYDKWVKEVK GKKTLDQDTF
     DKQLLPSTPN KALEFNGTHM AFVDPAADPE YIFYAYKRFN FELKDPNFTS EENMFKDVSE
     KPLIPARKAQ ITNANYKRHG MKLMILGNDE PYNNEFKKDE SKNAKEMKKI SKDAQDQDND
     DHGGGH