| IED ID | IndEnz0002001809 |
| Enzyme Type ID | protease001809 |
| Protein Name |
Sterol regulatory element-binding protein 1 SREBP-1 Adipocyte determination- and differentiation-dependent factor 1 ADD1 Sterol regulatory element-binding transcription factor 1 Cleaved into: Processed sterol regulatory element-binding protein 1 Transcription factor SREBF1 |
| Gene Name | Srebf1 Srebp1 |
| Organism | Rattus norvegicus (Rat) |
| Taxonomic Lineage | cellular organisms Eukaryota Opisthokonta Metazoa Eumetazoa Bilateria Deuterostomia Chordata Craniata Vertebrata Gnathostomata (jawed vertebrates) Teleostomi Euteleostomi Sarcopterygii Dipnotetrapodomorpha Tetrapoda Amniota Mammalia Theria Eutheria Boreoeutheria Euarchontoglires Glires (Rodents and rabbits) Rodentia Myomorpha (mice and others) Muroidea Muridae Murinae Rattus Rattus norvegicus (Rat) |
| Enzyme Sequence | MDELPFGEAALEQALAEVCEMDAALLTDIEDMLQLINNQDSDFPGLFDAPYAGGETGDTGPSSPGASSPESFSSPASLGSSLEAFLGGPKVTPAPLSPPPSAPTAVKMYPSVPPFSPGPGIKEEPVPLTILQPPAPQPSPGTLLPPSFPPPPVQLSPAPVLGYSSLPSGFSGTLPGNTQQTPSSLPLGSTPGISPTPLHTQVQSSAAQQPPPASAAPRMSTVASQIQQVPVVLQPHFIKADSLLLTAVKTDTGATMKTAGINTLAPGTAVQAGPLQTLVSGGTILATVPLVVDTDKLPIHRLAAGGKALGSAQSRGEKRTAHNAIEKRYRSSINDKIVELKDLVVGTEAKLNKSAVLRKAIDYIRFLQHSNQKLKQENLTLRSAHKSKSLKDLVSACGSGGGTDVSMEGMKPEVVETLTPPPSDAGSPSQSSPLSLGSRGSSSGGSDSEPDSPAFEDNQVKAQRLPSHSRGMLDRSRLALCVLVFLCLTCNPLASLFGWGILTPSDASGVHRSSGRSMLEAESRDGSNWTQWLLPPLVWLANGLLVLACLALLFVYGEPVTRPHSGPAVHFWRHRKQADLDLARGDFAQAAQQLWLALQALGRPLPTSNLDLACSLLWNLVRHLLQRLWVGRWLAGQAGGLQRDYRLRKDARASARDAAVVYHKLHQLHAMGKYTGGHLVASNLALSALNLAECAGDAISMATLAEIYVAAALRVKTSLPRALHFLTRFFLSSARQACLAQSGAVPLAMQWLCHPVGHRFFVDGDWAVHGAPQESLYSVAGNPVDPLAQVTRLFCEHLLERALNCIAQPSPGAADGDREFSDALGYLQLLNSCSDAVGAPACSFSVSSSMATTTGTDPVAKWWASLTAVVIHWLRRDEEAAERLYPLVEHIPQVLQETERPLPRAALYSFKAARALLDHRKVESSPASLAICEKASGYLRDSLASTSTASSIDKAMQLLLCDLLLVARTSLWRRQQSAASAQGAHGTSNGPQASALELRGFQHDLSSLRRLAQSFRPAMRRVFLHEATARLMAGASPARTHQLLDRSLRRRAGSSGKGGAAAELEPRPTWREHTEALLLASCYLPPAFLSAPGQRVSMLAEAARTVEKLGDHRLLLDCQQMLLRLGGGTTVTSS |
| Enzyme Length | 1134 |
| Uniprot Accession Number | P56720 |
| Absorption | |
| Active Site | |
| Activity Regulation | |
| Binding Site | |
| Calcium Binding | |
| catalytic Activity | |
| DNA Binding | |
| EC Number | |
| Enzyme Function | FUNCTION: [Sterol regulatory element-binding protein 1]: Precursor of the transcription factor form (Processed sterol regulatory element-binding protein 1), which is embedded in the endoplasmic reticulum membrane (By similarity). Low sterol concentrations promote processing of this form, releasing the transcription factor form that translocates into the nucleus and activates transcription of genes involved in cholesterol biosynthesis and lipid homeostasis (By similarity). {ECO:0000250|UniProtKB:P36956, ECO:0000250|UniProtKB:Q9WTN3}.; FUNCTION: [Processed sterol regulatory element-binding protein 1]: Key transcription factor that regulates expression of genes involved in cholesterol biosynthesis and lipid homeostasis (By similarity). Binds to the sterol regulatory element 1 (SRE-1) (5'-ATCACCCCAC-3') (PubMed:7739539). Has dual sequence specificity binding to both an E-box motif (5'-ATCACGTGA-3') and to SRE-1 (5'-ATCACCCCAC-3') (By similarity). Regulates the promoters of genes involved in cholesterol biosynthesis and the LDL receptor (LDLR) pathway of sterol regulation (By similarity). {ECO:0000250|UniProtKB:P36956, ECO:0000269|PubMed:7739539}.; FUNCTION: [Isoform SREBP-1A]: Isoform expressed only in select tissues, which has higher transcriptional activity compared to SREBP-1C (By similarity). Able to stimulate both lipogenic and cholesterogenic gene expression (By similarity). Has a role in the nutritional regulation of fatty acids and triglycerides in lipogenic organs such as the liver. Required for innate immune response in macrophages by regulating lipid metabolism (By similarity). {ECO:0000250|UniProtKB:P36956, ECO:0000250|UniProtKB:Q9WTN3}.; FUNCTION: [Isoform SREBP-1C]: Predominant isoform expressed in most tissues, which has weaker transcriptional activity compared to isoform SREBP-1A (By similarity). Primarily controls expression of lipogenic gene (By similarity). Strongly activates global lipid synthesis in rapidly growing cells (By similarity). {ECO:0000250|UniProtKB:P36956, ECO:0000250|UniProtKB:Q9WTN3}. |
| Temperature Dependency | |
| PH Dependency | |
| Pathway | |
| nucleotide Binding | |
| Features | Alternative sequence (1); Chain (2); Compositional bias (4); Domain (1); Frameshift (1); Modified residue (8); Motif (1); Natural variant (1); Region (6); Sequence conflict (3); Site (3); Topological domain (3); Transmembrane (2) |
| Keywords | Activator;Alternative splicing;Cholesterol metabolism;Cytoplasmic vesicle;DNA-binding;Endoplasmic reticulum;Golgi apparatus;Lipid metabolism;Membrane;Nucleus;Phosphoprotein;Reference proteome;Steroid metabolism;Sterol metabolism;Transcription;Transcription regulation;Transmembrane;Transmembrane helix;Ubl conjugation |
| Interact With | |
| Induction | |
| Subcellular Location | SUBCELLULAR LOCATION: [Sterol regulatory element-binding protein 1]: Endoplasmic reticulum membrane {ECO:0000250|UniProtKB:P36956}; Multi-pass membrane protein {ECO:0000255}. Golgi apparatus membrane {ECO:0000250|UniProtKB:Q9WTN3}; Multi-pass membrane protein {ECO:0000255}. Cytoplasmic vesicle, COPII-coated vesicle membrane {ECO:0000250|UniProtKB:Q9WTN3}; Multi-pass membrane protein {ECO:0000255}. Note=At high sterol concentrations, the SCAP-SREBP is retained in the endoplasmic reticulum. Low sterol concentrations promote recruitment into COPII-coated vesicles and transport of the SCAP-SREBP to the Golgi, where it is processed. {ECO:0000250|UniProtKB:Q9WTN3}.; SUBCELLULAR LOCATION: [Processed sterol regulatory element-binding protein 1]: Nucleus {ECO:0000250|UniProtKB:P36956}. |
| Modified Residue | MOD_RES 97; /note=Phosphoserine; /evidence=ECO:0007744|PubMed:22673903; MOD_RES 116; /note=Phosphoserine; /evidence=ECO:0000250|UniProtKB:P36956; MOD_RES 331; /note=Phosphoserine; by SIK1; /evidence=ECO:0000250|UniProtKB:Q9WTN3; MOD_RES 332; /note=Phosphoserine; by SIK1; /evidence=ECO:0000250|UniProtKB:Q9WTN3; MOD_RES 389; /note=Phosphoserine; by AMPK; /evidence=ECO:0000250|UniProtKB:Q9WTN3; MOD_RES 395; /note=Phosphoserine; by SIK1; /evidence=ECO:0000250|UniProtKB:Q9WTN3; MOD_RES 448; /note=Phosphoserine; /evidence=ECO:0007744|PubMed:22673903; MOD_RES 1047; /note=Phosphoserine; /evidence=ECO:0000250|UniProtKB:P36956 |
| Post Translational Modification | PTM: [Sterol regulatory element-binding protein 1]: Processed in the Golgi apparatus, releasing the protein from the membrane. At low cholesterol the SCAP-SREBP complex is recruited into COPII vesicles for export from the endoplasmic reticulum. In the Golgi, complex SREBPs are cleaved sequentially by site-1 (MBTPS1, S1P) and site-2 (MBTPS2, S2P) proteases. The first cleavage by site-1 protease occurs within the luminal loop, the second cleavage by site-2 protease occurs within the first transmembrane domain, releasing the transcription factor from the Golgi membrane. {ECO:0000250|UniProtKB:P36956}.; PTM: Phosphorylated by AMPK, leading to suppress protein processing and nuclear translocation, and repress target gene expression. Phosphorylation at Ser-395 by SIK1 represses activity possibly by inhibiting DNA-binding. {ECO:0000250|UniProtKB:Q9WTN3}.; PTM: [Processed sterol regulatory element-binding protein 1]: Ubiquitinated; the nuclear form has a rapid turnover and is rapidly ubiquitinated and degraded by the proteasome in the nucleus. {ECO:0000250|UniProtKB:P36956}. |
| Signal Peptide | |
| Structure 3D | |
| Cross Reference PDB | - |
| Mapped Pubmed ID | 10207099; 11278421; 11875060; 12016216; 12031952; 12031958; 12421847; 12600983; 12764144; 12771318; 12865412; 12896875; 12941932; 14505487; 14668913; 14674713; 14744869; 14988441; 15001432; 15037635; 15039461; 15123649; 15123720; 15249218; 15266058; 15280151; 15330762; 15561928; 15637161; 15896314; 15944339; 16002205; 16055439; 16091421; 16092054; 16222032; 16380121; 16407292; 16554040; 16741953; 16772326; 16787385; 16834571; 17241878; 17296605; 17313375; 17449871; 17456898; 17524234; 17526932; 17632011; 18071061; 18157544; 18171911; 18613221; 18665039; 18801905; 18989661; 19017816; 19048273; 19125418; 19158095; 19244231; 19299314; 19332540; 19357831; 19366697; 19371623; 19375767; 19423844; 19616615; 19672729; 19682972; 19716432; 19966780; 20005944; 20041157; 20211032; 20589757; 20615871; 21036148; 21038676; 21167679; 21652712; 21731709; 21757781; 21906525; 21986124; 22031849; 22093779; 22292946; 22415588; 22511764; 22645024; 22898567; 23028851; 23065593; 23106379; 23239524; 23257266; 23295202; 23542164; 23583293; 23913732; 24362725; 24625548; 25348957; 25398788; 25616173; 25796423; 25847140; 26218603; 26327595; 26449613; 26589965; 27321819; 27352290; 27382175; 27826032; 27939985; 28027934; 28264426; 28465347; 28719803; 29366380; 29627845; 29735017; 30038487; 30998947; 31677037; 34655015; 9121491; 9786926; |
| Motif | MOTIF 27..35; /note=9aaTAD; /evidence=ECO:0000250|UniProtKB:P36956 |
| Gene Encoded By | |
| Mass | 120,521 |
| Kinetics | |
| Metal Binding | |
| Rhea ID | |
| Cross Reference Brenda |