ID NOS3_CANLF Reviewed; 1205 AA. AC Q9TUX8; DT 29-MAY-2007, integrated into UniProtKB/Swiss-Prot. DT 01-MAY-2000, sequence version 1. DT 27-MAR-2024, entry version 133. DE RecName: Full=Nitric oxide synthase 3 {ECO:0000305}; DE EC=1.14.13.39 {ECO:0000250|UniProtKB:P29474}; DE AltName: Full=Constitutive NOS; DE Short=cNOS; DE AltName: Full=EC-NOS; DE AltName: Full=NOS type III; DE Short=NOSIII; DE AltName: Full=Nitric oxide synthase, endothelial {ECO:0000305}; DE Short=Endothelial NOS {ECO:0000305}; DE Short=eNOS {ECO:0000305}; GN Name=NOS3; Synonyms=NOS; OS Canis lupus familiaris (Dog) (Canis familiaris). OC Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; OC Eutheria; Laurasiatheria; Carnivora; Caniformia; Canidae; Canis. OX NCBI_TaxID=9615; RN [1] RP NUCLEOTIDE SEQUENCE [MRNA]. RC TISSUE=Heart; RX PubMed=10442857; DOI=10.1006/niox.1999.0234; RA Schwemmer M., Bassenge E.; RT "Assembly and characterization of canine heart endothelial nitric oxide RT synthase cDNA and 5'-flanking sequence by homology (RT-)PCR cloning."; RL Nitric Oxide 3:254-264(1999). CC -!- FUNCTION: Produces nitric oxide (NO) which is implicated in vascular CC smooth muscle relaxation through a cGMP-mediated signal transduction CC pathway. NO mediates vascular endothelial growth factor (VEGF)-induced CC angiogenesis in coronary vessels and promotes blood clotting through CC the activation of platelets (By similarity). CC {ECO:0000250|UniProtKB:P29474}. CC -!- CATALYTIC ACTIVITY: CC Reaction=H(+) + 2 L-arginine + 3 NADPH + 4 O2 = 4 H2O + 2 L-citrulline CC + 3 NADP(+) + 2 nitric oxide; Xref=Rhea:RHEA:19897, CC ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:15379, CC ChEBI:CHEBI:16480, ChEBI:CHEBI:32682, ChEBI:CHEBI:57743, CC ChEBI:CHEBI:57783, ChEBI:CHEBI:58349; EC=1.14.13.39; CC Evidence={ECO:0000250|UniProtKB:P29474}; CC PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:19898; CC Evidence={ECO:0000250|UniProtKB:P29474}; CC -!- COFACTOR: CC Name=heme b; Xref=ChEBI:CHEBI:60344; CC Evidence={ECO:0000250|UniProtKB:P29474}; CC -!- COFACTOR: CC Name=FAD; Xref=ChEBI:CHEBI:57692; CC Evidence={ECO:0000250|UniProtKB:P29476}; CC Note=Binds 1 FAD. {ECO:0000250|UniProtKB:P29476}; CC -!- COFACTOR: CC Name=FMN; Xref=ChEBI:CHEBI:58210; CC Evidence={ECO:0000250|UniProtKB:P35228}; CC Note=Binds 1 FMN. {ECO:0000250|UniProtKB:P35228}; CC -!- COFACTOR: CC Name=(6R)-L-erythro-5,6,7,8-tetrahydrobiopterin; CC Xref=ChEBI:CHEBI:59560; Evidence={ECO:0000250|UniProtKB:P35228}; CC Note=Tetrahydrobiopterin (BH4). May stabilize the dimeric form of the CC enzyme. {ECO:0000250|UniProtKB:P35228}; CC -!- ACTIVITY REGULATION: Stimulated by calcium/calmodulin. Inhibited by CC NOSIP and NOSTRIN (By similarity). {ECO:0000250}. CC -!- SUBUNIT: Homodimer. Interacts with NOSIP and NOSTRIN (By similarity). CC Interacts with HSP90AB1 (By similarity). Forms a complex with ASL, ASS1 CC and SLC7A1; the complex regulates cell-autonomous L-arginine synthesis CC and citrulline recycling while channeling extracellular L-arginine to CC nitric oxide synthesis pathway (By similarity). CC {ECO:0000250|UniProtKB:P29474, ECO:0000250|UniProtKB:P70313}. CC -!- SUBCELLULAR LOCATION: Membrane, caveola {ECO:0000250}. Cytoplasm, CC cytoskeleton {ECO:0000250}. Golgi apparatus {ECO:0000250}. Cell CC membrane {ECO:0000250}. Note=Specifically associates with actin CC cytoskeleton in the G2 phase of the cell cycle, which is favored by CC interaction with NOSIP and results in a reduced enzymatic activity. CC {ECO:0000250}. CC -!- PTM: Phosphorylation by AMPK at Ser-1179 in the presence of Ca(2+)- CC calmodulin (CaM) activates activity. In absence of Ca(2+)-calmodulin, CC AMPK also phosphorylates Thr-497, resulting in inhibition of activity. CC Phosphorylation of Ser-116 by CDK5 reduces activity (By similarity). CC {ECO:0000250}. CC -!- SIMILARITY: Belongs to the NOS family. {ECO:0000305}. CC --------------------------------------------------------------------------- CC Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms CC Distributed under the Creative Commons Attribution (CC BY 4.0) License CC --------------------------------------------------------------------------- DR EMBL; AF143503; AAD52161.1; -; mRNA. DR AlphaFoldDB; Q9TUX8; -. DR BMRB; Q9TUX8; -. DR SMR; Q9TUX8; -. DR STRING; 9615.ENSCAFP00000061234; -. DR PaxDb; 9612-ENSCAFP00000006985; -. DR eggNOG; KOG1158; Eukaryota. DR InParanoid; Q9TUX8; -. DR Proteomes; UP000002254; Unplaced. DR Proteomes; UP000694429; Unplaced. DR Proteomes; UP000694542; Unplaced. DR Proteomes; UP000805418; Unplaced. DR GO; GO:0005901; C:caveola; IEA:UniProtKB-SubCell. DR GO; GO:0005856; C:cytoskeleton; IEA:UniProtKB-SubCell. DR GO; GO:0005829; C:cytosol; IBA:GO_Central. DR GO; GO:0005794; C:Golgi apparatus; IEA:UniProtKB-SubCell. DR GO; GO:0005634; C:nucleus; IBA:GO_Central. DR GO; GO:0005886; C:plasma membrane; IBA:GO_Central. DR GO; GO:0005516; F:calmodulin binding; IEA:UniProtKB-KW. DR GO; GO:0050660; F:flavin adenine dinucleotide binding; IBA:GO_Central. DR GO; GO:0010181; F:FMN binding; IBA:GO_Central. DR GO; GO:0020037; F:heme binding; IEA:InterPro. DR GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW. DR GO; GO:0050661; F:NADP binding; IEA:InterPro. DR GO; GO:0004517; F:nitric-oxide synthase activity; IBA:GO_Central. DR GO; GO:0006527; P:arginine catabolic process; IBA:GO_Central. DR GO; GO:0045776; P:negative regulation of blood pressure; IBA:GO_Central. DR GO; GO:0006809; P:nitric oxide biosynthetic process; IBA:GO_Central. DR GO; GO:0007263; P:nitric oxide mediated signal transduction; IBA:GO_Central. DR GO; GO:0009725; P:response to hormone; IBA:GO_Central. DR GO; GO:0032496; P:response to lipopolysaccharide; IBA:GO_Central. DR CDD; cd00795; NOS_oxygenase_euk; 1. DR Gene3D; 3.40.50.360; -; 1. DR Gene3D; 3.90.440.10; Nitric Oxide Synthase;Heme Domain;Chain A domain 2; 1. DR Gene3D; 3.40.50.80; Nucleotide-binding domain of ferredoxin-NADP reductase (FNR) module; 1. DR Gene3D; 2.40.30.10; Translation factors; 1. DR InterPro; IPR003097; CysJ-like_FAD-binding. DR InterPro; IPR017927; FAD-bd_FR_type. DR InterPro; IPR001094; Flavdoxin-like. DR InterPro; IPR008254; Flavodoxin/NO_synth. DR InterPro; IPR001709; Flavoprot_Pyr_Nucl_cyt_Rdtase. DR InterPro; IPR029039; Flavoprotein-like_sf. DR InterPro; IPR039261; FNR_nucleotide-bd. DR InterPro; IPR023173; NADPH_Cyt_P450_Rdtase_alpha. DR InterPro; IPR044943; NOS_dom_1. DR InterPro; IPR044940; NOS_dom_2. DR InterPro; IPR044944; NOS_dom_3. DR InterPro; IPR012144; NOS_euk. DR InterPro; IPR004030; NOS_N. DR InterPro; IPR036119; NOS_N_sf. DR InterPro; IPR001433; OxRdtase_FAD/NAD-bd. DR InterPro; IPR017938; Riboflavin_synthase-like_b-brl. DR PANTHER; PTHR43410; NITRIC OXIDE SYNTHASE OXYGENASE; 1. DR PANTHER; PTHR43410:SF1; NITRIC OXIDE SYNTHASE OXYGENASE; 1. DR Pfam; PF00667; FAD_binding_1; 1. DR Pfam; PF00258; Flavodoxin_1; 1. DR Pfam; PF00175; NAD_binding_1; 1. DR Pfam; PF02898; NO_synthase; 1. DR PIRSF; PIRSF000333; NOS; 1. DR PRINTS; PR00369; FLAVODOXIN. DR PRINTS; PR00371; FPNCR. DR SUPFAM; SSF52343; Ferredoxin reductase-like, C-terminal NADP-linked domain; 1. DR SUPFAM; SSF52218; Flavoproteins; 1. DR SUPFAM; SSF56512; Nitric oxide (NO) synthase oxygenase domain; 1. DR SUPFAM; SSF63380; Riboflavin synthase domain-like; 1. DR PROSITE; PS51384; FAD_FR; 1. DR PROSITE; PS50902; FLAVODOXIN_LIKE; 1. DR PROSITE; PS60001; NOS; 1. PE 2: Evidence at transcript level; KW Calcium; Calmodulin-binding; Cell membrane; Cytoplasm; Cytoskeleton; FAD; KW Flavoprotein; FMN; Golgi apparatus; Heme; Iron; Lipoprotein; Membrane; KW Metal-binding; Myristate; NADP; Oxidoreductase; Palmitate; Phosphoprotein; KW Reference proteome; Zinc. FT INIT_MET 1 FT /note="Removed" FT /evidence="ECO:0000250|UniProtKB:P29473" FT CHAIN 2..1205 FT /note="Nitric oxide synthase 3" FT /id="PRO_0000289580" FT DOMAIN 522..705 FT /note="Flavodoxin-like" FT /evidence="ECO:0000255|PROSITE-ProRule:PRU00088" FT DOMAIN 758..1004 FT /note="FAD-binding FR-type" FT /evidence="ECO:0000255|PROSITE-ProRule:PRU00716" FT REGION 1..73 FT /note="Disordered" FT /evidence="ECO:0000256|SAM:MobiDB-lite" FT REGION 100..488 FT /note="Interaction with NOSIP" FT /evidence="ECO:0000250" FT REGION 492..512 FT /note="Calmodulin-binding" FT /evidence="ECO:0000255" FT REGION 819..850 FT /note="Disordered" FT /evidence="ECO:0000256|SAM:MobiDB-lite" FT COMPBIAS 40..67 FT /note="Pro residues" FT /evidence="ECO:0000256|SAM:MobiDB-lite" FT BINDING 96 FT /ligand="Zn(2+)" FT /ligand_id="ChEBI:CHEBI:29105" FT /ligand_note="ligand shared between homodimeric partners" FT /evidence="ECO:0000250|UniProtKB:P35228" FT BINDING 101 FT /ligand="Zn(2+)" FT /ligand_id="ChEBI:CHEBI:29105" FT /ligand_note="ligand shared between homodimeric partners" FT /evidence="ECO:0000250|UniProtKB:P35228" FT BINDING 104 FT /ligand="(6R)-L-erythro-5,6,7,8-tetrahydrobiopterin" FT /ligand_id="ChEBI:CHEBI:59560" FT /evidence="ECO:0000250|UniProtKB:P29474" FT BINDING 186 FT /ligand="heme b" FT /ligand_id="ChEBI:CHEBI:60344" FT /ligand_part="Fe" FT /ligand_part_id="ChEBI:CHEBI:18248" FT /note="axial binding residue" FT /evidence="ECO:0000250|UniProtKB:P29474" FT BINDING 249 FT /ligand="L-arginine" FT /ligand_id="ChEBI:CHEBI:32682" FT /evidence="ECO:0000250|UniProtKB:P29474" FT BINDING 358 FT /ligand="L-arginine" FT /ligand_id="ChEBI:CHEBI:32682" FT /evidence="ECO:0000250|UniProtKB:P29474" FT BINDING 359 FT /ligand="L-arginine" FT /ligand_id="ChEBI:CHEBI:32682" FT /evidence="ECO:0000250|UniProtKB:P29474" FT BINDING 363 FT /ligand="L-arginine" FT /ligand_id="ChEBI:CHEBI:32682" FT /evidence="ECO:0000250|UniProtKB:P29474" FT BINDING 368 FT /ligand="L-arginine" FT /ligand_id="ChEBI:CHEBI:32682" FT /evidence="ECO:0000250|UniProtKB:P29474" FT BINDING 448 FT /ligand="(6R)-L-erythro-5,6,7,8-tetrahydrobiopterin" FT /ligand_id="ChEBI:CHEBI:59560" FT /evidence="ECO:0000250|UniProtKB:P29474" FT BINDING 449 FT /ligand="(6R)-L-erythro-5,6,7,8-tetrahydrobiopterin" FT /ligand_id="ChEBI:CHEBI:59560" FT /evidence="ECO:0000250|UniProtKB:P29474" FT BINDING 462 FT /ligand="(6R)-L-erythro-5,6,7,8-tetrahydrobiopterin" FT /ligand_id="ChEBI:CHEBI:59560" FT /evidence="ECO:0000250|UniProtKB:P29474" FT BINDING 477 FT /ligand="heme b" FT /ligand_id="ChEBI:CHEBI:60344" FT /evidence="ECO:0000250|UniProtKB:P29474" FT BINDING 528 FT /ligand="FMN" FT /ligand_id="ChEBI:CHEBI:58210" FT /evidence="ECO:0000250|UniProtKB:P35228" FT BINDING 529 FT /ligand="FMN" FT /ligand_id="ChEBI:CHEBI:58210" FT /evidence="ECO:0000250|UniProtKB:P35228" FT BINDING 530 FT /ligand="FMN" FT /ligand_id="ChEBI:CHEBI:58210" FT /evidence="ECO:0000250|UniProtKB:P35228" FT BINDING 532 FT /ligand="FMN" FT /ligand_id="ChEBI:CHEBI:58210" FT /evidence="ECO:0000250|UniProtKB:P35228" FT BINDING 574 FT /ligand="FMN" FT /ligand_id="ChEBI:CHEBI:58210" FT /evidence="ECO:0000250|UniProtKB:P35228" FT BINDING 575 FT /ligand="FMN" FT /ligand_id="ChEBI:CHEBI:58210" FT /evidence="ECO:0000250|UniProtKB:P35228" FT BINDING 656 FT /ligand="FMN" FT /ligand_id="ChEBI:CHEBI:58210" FT /evidence="ECO:0000250|UniProtKB:P35228" FT BINDING 663 FT /ligand="FMN" FT /ligand_id="ChEBI:CHEBI:58210" FT /evidence="ECO:0000250|UniProtKB:P35228" FT BINDING 689 FT /ligand="FMN" FT /ligand_id="ChEBI:CHEBI:58210" FT /evidence="ECO:0000250|UniProtKB:P35228" FT BINDING 693 FT /ligand="FMN" FT /ligand_id="ChEBI:CHEBI:58210" FT /evidence="ECO:0000250|UniProtKB:P35228" FT BINDING 778 FT /ligand="NADP(+)" FT /ligand_id="ChEBI:CHEBI:58349" FT /evidence="ECO:0000250|UniProtKB:P29476" FT BINDING 800 FT /ligand="FAD" FT /ligand_id="ChEBI:CHEBI:57692" FT /evidence="ECO:0000250|UniProtKB:P29476" FT BINDING 940 FT /ligand="FAD" FT /ligand_id="ChEBI:CHEBI:57692" FT /evidence="ECO:0000250|UniProtKB:P29476" FT BINDING 942 FT /ligand="FAD" FT /ligand_id="ChEBI:CHEBI:57692" FT /evidence="ECO:0000250|UniProtKB:P29476" FT BINDING 943 FT /ligand="FAD" FT /ligand_id="ChEBI:CHEBI:57692" FT /evidence="ECO:0000250|UniProtKB:P29476" FT BINDING 958 FT /ligand="FAD" FT /ligand_id="ChEBI:CHEBI:57692" FT /evidence="ECO:0000250|UniProtKB:P29476" FT BINDING 960 FT /ligand="FAD" FT /ligand_id="ChEBI:CHEBI:57692" FT /evidence="ECO:0000250|UniProtKB:P29476" FT BINDING 964 FT /ligand="FAD" FT /ligand_id="ChEBI:CHEBI:57692" FT /evidence="ECO:0000250|UniProtKB:P29476" FT BINDING 977 FT /ligand="FAD" FT /ligand_id="ChEBI:CHEBI:57692" FT /evidence="ECO:0000250|UniProtKB:P29476" FT BINDING 978 FT /ligand="FAD" FT /ligand_id="ChEBI:CHEBI:57692" FT /evidence="ECO:0000250|UniProtKB:P29476" FT BINDING 979 FT /ligand="FAD" FT /ligand_id="ChEBI:CHEBI:57692" FT /evidence="ECO:0000250|UniProtKB:P29476" FT BINDING 1018 FT /ligand="NADP(+)" FT /ligand_id="ChEBI:CHEBI:58349" FT /evidence="ECO:0000250|UniProtKB:P29476" FT BINDING 1051 FT /ligand="NADP(+)" FT /ligand_id="ChEBI:CHEBI:58349" FT /evidence="ECO:0000250|UniProtKB:P29476" FT BINDING 1080 FT /ligand="NADP(+)" FT /ligand_id="ChEBI:CHEBI:58349" FT /evidence="ECO:0000250|UniProtKB:P29476" FT BINDING 1081 FT /ligand="NADP(+)" FT /ligand_id="ChEBI:CHEBI:58349" FT /evidence="ECO:0000250|UniProtKB:P29476" FT BINDING 1087 FT /ligand="NADP(+)" FT /ligand_id="ChEBI:CHEBI:58349" FT /evidence="ECO:0000250|UniProtKB:P29476" FT BINDING 1089 FT /ligand="NADP(+)" FT /ligand_id="ChEBI:CHEBI:58349" FT /evidence="ECO:0000250|UniProtKB:P29476" FT BINDING 1091 FT /ligand="NADP(+)" FT /ligand_id="ChEBI:CHEBI:58349" FT /evidence="ECO:0000250|UniProtKB:P29476" FT MOD_RES 116 FT /note="Phosphoserine; by CDK5" FT /evidence="ECO:0000250|UniProtKB:P29474" FT MOD_RES 497 FT /note="Phosphothreonine; by AMPK" FT /evidence="ECO:0000250|UniProtKB:P29473" FT MOD_RES 617 FT /note="Phosphoserine" FT /evidence="ECO:0000250|UniProtKB:P70313" FT MOD_RES 635 FT /note="Phosphoserine" FT /evidence="ECO:0000250|UniProtKB:P29473" FT MOD_RES 640 FT /note="Phosphoserine" FT /evidence="ECO:0000250|UniProtKB:P29474" FT MOD_RES 838 FT /note="Phosphoserine" FT /evidence="ECO:0000250|UniProtKB:P29474" FT MOD_RES 1177 FT /note="Phosphothreonine" FT /evidence="ECO:0000250|UniProtKB:P70313" FT MOD_RES 1179 FT /note="Phosphoserine; by AMPK" FT /evidence="ECO:0000250|UniProtKB:P29473" FT MOD_RES 1181 FT /note="Phosphoserine" FT /evidence="ECO:0000250|UniProtKB:P70313" FT LIPID 2 FT /note="N-myristoyl glycine" FT /evidence="ECO:0000250" FT LIPID 15 FT /note="S-palmitoyl cysteine" FT /evidence="ECO:0000250" FT LIPID 26 FT /note="S-palmitoyl cysteine" FT /evidence="ECO:0000250" SQ SEQUENCE 1205 AA; 133046 MW; C150CDEB01685BA5 CRC64; MGNLKSVGQE PGPPCGLGLG LGLGLCGKQG PASPTSEPSR APALAPPPSP PPAPDHSSPP LTRPPDGPKF PRVKNWEVGS ITYDTLSAQS QQDGPCTPRR CLGSLVFPRK LQSRPSQNPA PPEQLLSQAR DFISQYYSSI KRSGSQAHEQ RLQEVEAEVA ATGTYQLRES ELVFGAKQAW RNAPRCVGRI QWGKLQVFDA RDCSSAQEMF TYICNHIKYA TNRGNLRSAI TVFPQRASGR GDFRIWNSQL VRYAGYRQQD GSVRGDPANV EITELCIQHG WTPGNGRFDV LPLLLQAPDE PPELFALPPE LVLEVPLEHP TLEWFAALGL RWYALPAVSN MLLEIGGLEF PAAPFSGWYM STEIGTRNLC DPHRYNILED VAVCMDLDTR TTSSLWKDKA AVEINLAVLH SYQLAKVTIV DHHAATASFM KHLENEQKAR GGCPADWAWI VPPISGSLTP VFHQEMVNYV LSPAFRYQTD PWKGSASKGA GVTRKKTFKE VANAVKISAS LMGTVMAKRV KATILYGSET GRAQSYAQQL GRLFRKAFDP RVLCMDEYDV VSLEHETLVL VVTSTFGNGD PPENGESFAA ALMEMSGSYN SSPRPEQHKS YKIRFNSVSC SDPLVSSWRR KRKESRNTDS AGALGTLRFC VFGLGSRAYP HFCAFARAVD TRLEELGGER LLQLGQGDEL CGQEEAFGGW AQAAFQASWE TFCVGEDAKA AARDIFSPKR TWKRQRYRLS AQAEGLQLLP GLIHVHRRKM VQATVLAVEN LQSSKSTRAT ILVRLDTGSQ EALQYQPGDH IGICPPNRPG LVEALLSRVE DPPPPGEPVA VEQLEKGSPG GPPPSWVRDP RLPPCTLRQA LTFFLDITSP PSPQLLRLLS TLAEESSEQQ ELESLSQDPR RYEEWKWFRC PTLLEVLEQF PSVALPAPLL LTQLPLLQPR YYSVSSAPSA HPGEIHLTVA VLAYRTQDGL GPLHYGVCST WLSQLKAGDP VPCFIRGAPS FRLPPDPSLP CILVGPGTGI APFRGFWQGR LHDIYSKGLQ PAPMTLVFGC RCSQLDHLYR DEVQDAQQRG VFGRVLTAFS REPDSPKTYV QDILRTELAA EVHRVLCLER GHMFVCGDVT MATSVLQTVQ RILATEGDME LDEAGDVIGV LRDQQRYHED IFGLTLRTQE VTSRIRTQSF SLQERHLRGA VPWALDPPGP DTVGP //