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THAS_MACFA
ID   THAS_MACFA              Reviewed;         533 AA.
AC   Q2PG45;
DT   28-JUL-2009, integrated into UniProtKB/Swiss-Prot.
DT   28-JUL-2009, sequence version 2.
DT   03-AUG-2022, entry version 77.
DE   RecName: Full=Thromboxane-A synthase;
DE            Short=TXA synthase;
DE            Short=TXS;
DE            EC=5.3.99.5 {ECO:0000250|UniProtKB:P24557};
DE   AltName: Full=Cytochrome P450 5A1;
DE   AltName: Full=Hydroperoxy icosatetraenoate dehydratase {ECO:0000250|UniProtKB:P24557};
DE            EC=4.2.1.152 {ECO:0000250|UniProtKB:P24557};
GN   Name=TBXAS1; Synonyms=CYP5, CYP5A1; ORFNames=QccE-11311;
OS   Macaca fascicularis (Crab-eating macaque) (Cynomolgus monkey).
OC   Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia;
OC   Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini;
OC   Cercopithecidae; Cercopithecinae; Macaca.
OX   NCBI_TaxID=9541;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA].
RC   TISSUE=Brain cortex;
RG   International consortium for macaque cDNA sequencing and analysis;
RT   "DNA sequences of macaque genes expressed in brain or testis and its
RT   evolutionary implications.";
RL   Submitted (JUN-2005) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Catalyzes the conversion of prostaglandin H2 (PGH2) to
CC       thromboxane A2 (TXA2), a potent inducer of blood vessel constriction
CC       and platelet aggregation. Cleaves also PGH2 to 12-hydroxy-
CC       heptadecatrienoicacid (12-HHT) and malondialdehyde, which is known to
CC       act as a mediator of DNA damage. 12-HHT and malondialdehyde are formed
CC       stoichiometrically in the same amounts as TXA2. Additionally, displays
CC       dehydratase activity, toward (15S)-hydroperoxy-(5Z,8Z,11Z,13E)-
CC       eicosatetraenoate (15(S)-HPETE) producing 15-KETE and 15-HETE.
CC       {ECO:0000250|UniProtKB:P24557}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=prostaglandin H2 = thromboxane A2; Xref=Rhea:RHEA:17137,
CC         ChEBI:CHEBI:57405, ChEBI:CHEBI:57445; EC=5.3.99.5;
CC         Evidence={ECO:0000250|UniProtKB:P24557};
CC       PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:17138;
CC         Evidence={ECO:0000250|UniProtKB:P24557};
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=prostaglandin H2 = (12S)-hydroxy-(5Z,8E,10E)-
CC         heptadecatrienoate + malonaldehyde; Xref=Rhea:RHEA:48644,
CC         ChEBI:CHEBI:57405, ChEBI:CHEBI:90694, ChEBI:CHEBI:566274;
CC         Evidence={ECO:0000250|UniProtKB:P24557};
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=a hydroperoxyeicosatetraenoate = an oxoeicosatetraenoate +
CC         H2O; Xref=Rhea:RHEA:55556, ChEBI:CHEBI:15377, ChEBI:CHEBI:59720,
CC         ChEBI:CHEBI:131859; EC=4.2.1.152;
CC         Evidence={ECO:0000250|UniProtKB:P24557};
CC       PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:55557;
CC         Evidence={ECO:0000250|UniProtKB:P24557};
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=(15S)-hydroperoxy-(5Z,8Z,11Z,13E)-eicosatetraenoate = 15-oxo-
CC         (5Z,8Z,11Z,13E)-eicosatetraenoate + H2O; Xref=Rhea:RHEA:48636,
CC         ChEBI:CHEBI:15377, ChEBI:CHEBI:57410, ChEBI:CHEBI:57446;
CC         Evidence={ECO:0000250|UniProtKB:P24557};
CC       PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:48637;
CC         Evidence={ECO:0000250|UniProtKB:P24557};
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=(15S)-hydroperoxy-(5Z,8Z,11Z,13E)-eicosatetraenoate + AH2 =
CC         (5Z,8Z,11Z,13E,15S)-hydroxyeicosatetraenoate + A + H2O;
CC         Xref=Rhea:RHEA:48856, ChEBI:CHEBI:13193, ChEBI:CHEBI:15377,
CC         ChEBI:CHEBI:17499, ChEBI:CHEBI:57409, ChEBI:CHEBI:57446;
CC         Evidence={ECO:0000250|UniProtKB:P24557};
CC       PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:48857;
CC         Evidence={ECO:0000250|UniProtKB:P24557};
CC   -!- COFACTOR:
CC       Name=heme; Xref=ChEBI:CHEBI:30413;
CC         Evidence={ECO:0000250|UniProtKB:P24557};
CC   -!- SUBUNIT: Monomer. {ECO:0000250|UniProtKB:P24557}.
CC   -!- SUBCELLULAR LOCATION: Endoplasmic reticulum membrane
CC       {ECO:0000250|UniProtKB:P24557}; Multi-pass membrane protein
CC       {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the cytochrome P450 family. {ECO:0000305}.
CC   -!- CAUTION: It is uncertain whether Met-1 is the initiator. An alternative
CC       upstream Met is found in primates, but not in other mammalians.
CC       {ECO:0000305}.
CC   -!- SEQUENCE CAUTION:
CC       Sequence=BAE72925.1; Type=Erroneous initiation; Evidence={ECO:0000305};
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DR   EMBL; AB220392; BAE72925.1; ALT_INIT; mRNA.
DR   RefSeq; NP_001271608.1; NM_001284679.1.
DR   AlphaFoldDB; Q2PG45; -.
DR   SMR; Q2PG45; -.
DR   STRING; 9541.XP_005550979.1; -.
DR   GeneID; 102128548; -.
DR   CTD; 6916; -.
DR   eggNOG; KOG0158; Eukaryota.
DR   Proteomes; UP000233100; Unplaced.
DR   GO; GO:0005789; C:endoplasmic reticulum membrane; ISS:UniProtKB.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0036134; F:12-hydroxyheptadecatrienoic acid synthase activity; IEA:RHEA.
DR   GO; GO:0020037; F:heme binding; ISS:UniProtKB.
DR   GO; GO:0106256; F:hydroperoxy icosatetraenoate dehydratase activity; ISS:UniProtKB.
DR   GO; GO:0005506; F:iron ion binding; IEA:InterPro.
DR   GO; GO:0004497; F:monooxygenase activity; IEA:UniProtKB-KW.
DR   GO; GO:0016705; F:oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen; IEA:InterPro.
DR   GO; GO:0004796; F:thromboxane-A synthase activity; IEA:UniProtKB-EC.
DR   GO; GO:0006690; P:icosanoid metabolic process; ISS:UniProtKB.
DR   GO; GO:0001516; P:prostaglandin biosynthetic process; ISS:UniProtKB.
DR   Gene3D; 1.10.630.10; -; 1.
DR   InterPro; IPR001128; Cyt_P450.
DR   InterPro; IPR017972; Cyt_P450_CS.
DR   InterPro; IPR002401; Cyt_P450_E_grp-I.
DR   InterPro; IPR036396; Cyt_P450_sf.
DR   Pfam; PF00067; p450; 1.
DR   PRINTS; PR00463; EP450I.
DR   PRINTS; PR00385; P450.
DR   SUPFAM; SSF48264; SSF48264; 1.
DR   PROSITE; PS00086; CYTOCHROME_P450; 1.
PE   2: Evidence at transcript level;
KW   Endoplasmic reticulum; Fatty acid biosynthesis; Fatty acid metabolism;
KW   Heme; Iron; Isomerase; Lipid biosynthesis; Lipid metabolism; Lyase;
KW   Membrane; Metal-binding; Monooxygenase; Oxidoreductase;
KW   Prostaglandin biosynthesis; Prostaglandin metabolism; Reference proteome;
KW   Transmembrane; Transmembrane helix.
FT   CHAIN           1..533
FT                   /note="Thromboxane-A synthase"
FT                   /id="PRO_0000380715"
FT   TOPO_DOM        1..10
FT                   /note="Cytoplasmic"
FT                   /evidence="ECO:0000250|UniProtKB:P24557"
FT   TRANSMEM        11..31
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TOPO_DOM        32..75
FT                   /note="Lumenal"
FT                   /evidence="ECO:0000250|UniProtKB:P24557"
FT   TRANSMEM        76..96
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TOPO_DOM        97..223
FT                   /note="Cytoplasmic"
FT                   /evidence="ECO:0000250|UniProtKB:P24557"
FT   TRANSMEM        224..244
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TOPO_DOM        245..335
FT                   /note="Lumenal"
FT                   /evidence="ECO:0000250|UniProtKB:P24557"
FT   TRANSMEM        336..356
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TOPO_DOM        357..533
FT                   /note="Cytoplasmic"
FT                   /evidence="ECO:0000250|UniProtKB:P24557"
FT   BINDING         479
FT                   /ligand="heme"
FT                   /ligand_id="ChEBI:CHEBI:30413"
FT                   /ligand_part="Fe"
FT                   /ligand_part_id="ChEBI:CHEBI:18248"
FT                   /note="axial binding residue"
FT                   /evidence="ECO:0000250|UniProtKB:P14779"
SQ   SEQUENCE   533 AA;  60447 MW;  E21709EFB0B005F7 CRC64;
     MEALGFLKLE VNGPMVTVAL SVALLALLKW YSTSAFSRLE KLGLRHPKPS PFIGNLMFFR
     QGFWESQMEL RKLYGPLCGY YLGRRMFIVI SEPDMIKQVL VENFSNFTNR MASGLEFKSV
     ADSVLFLRDK RWEEVRGALM SAFSPEKLNE MTPLISQACD LLLAHLKRYA ESGDAFDIQR
     CYRNYTTDVV ASVAFGTPVD SQQAPEDPFV KHCKRFFEFC IPRPILVLLL SFPSIMVPLA
     RILPNKNRDE LNGFFNKLIR NVIALRDQQA AEERRRDFLQ MVLDARHSAS PVGVQDFDMV
     GDVFSSTRCK PNPSRQHQAG PMARPLTVDE IVGQAFIFLI AGYEIVTNTL SFATYLLATN
     PDCQEKLLRE VDLFKEKHMV PEFCSLEEGL PYLDMVIAET LRMYPPAFRF TREAAQDCEV
     LGQRIPAGAV LEMAVGALHH DPEHWPSPET FNPERFTAEA QQQHRPFTYL PFGAGPRSCL
     GVRLGLLEVK LTLLHVLHKF QFQACPETQV PLQLESKSAL GPKNGVYIKI VSR
 
 
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