Details of Protein

General Information of Protein (ID: PRT01321)
Name O-linked N-acetylglucosamine transferase (OGT)
Synonyms   Click to Show/Hide Synonyms of This Protein
UDP-N-acetylglucosamine--peptide N-acetylglucosaminyltransferase 110 kDa subunit; O-GlcNAc transferase subunit p110; O-linked N-acetylglucosamine transferase 110 kDa subunit; OGT; OGT
Gene Name OGT Gene ID
8473
UniProt ID
O15294
Family Transferases (EC 2)
EC Number   EC: 2.4.1.255  (Click to Show/Hide the Complete EC Tree)
Transferase
Glycosyltransferase
Hexosyltransferase
EC: 2.4.1.255
  Click to Show/Hide the Molecular/Functional Data (Sequence/Structure/Function) of This Protein
Sequence
MASSVGNVADSTEPTKRMLSFQGLAELAHREYQAGDFEAAERHCMQLWRQEPDNTGVLLL
LSSIHFQCRRLDRSAHFSTLAIKQNPLLAEAYSNLGNVYKERGQLQEAIEHYRHALRLKP
DFIDGYINLAAALVAAGDMEGAVQAYVSALQYNPDLYCVRSDLGNLLKALGRLEEAKACY
LKAIETQPNFAVAWSNLGCVFNAQGEIWLAIHHFEKAVTLDPNFLDAYINLGNVLKEARI
FDRAVAAYLRALSLSPNHAVVHGNLACVYYEQGLIDLAIDTYRRAIELQPHFPDAYCNLA
NALKEKGSVAEAEDCYNTALRLCPTHADSLNNLANIKREQGNIEEAVRLYRKALEVFPEF
AAAHSNLASVLQQQGKLQEALMHYKEAIRISPTFADAYSNMGNTLKEMQDVQGALQCYTR
AIQINPAFADAHSNLASIHKDSGNIPEAIASYRTALKLKPDFPDAYCNLAHCLQIVCDWT
DYDERMKKLVSIVADQLEKNRLPSVHPHHSMLYPLSHGFRKAIAERHGNLCLDKINVLHK
PPYEHPKDLKLSDGRLRVGYVSSDFGNHPTSHLMQSIPGMHNPDKFEVFCYALSPDDGTN
FRVKVMAEANHFIDLSQIPCNGKAADRIHQDGIHILVNMNGYTKGARNELFALRPAPIQA
MWLGYPGTSGALFMDYIITDQETSPAEVAEQYSEKLAYMPHTFFIGDHANMFPHLKKKAV
IDFKSNGHIYDNRIVLNGIDLKAFLDSLPDVKIVKMKCPDGGDNADSSNTALNMPVIPMN
TIAEAVIEMINRGQIQITINGFSISNGLATTQINNKAATGEEVPRTIIVTTRSQYGLPED
AIVYCNFNQLYKIDPSTLQMWANILKRVPNSVLWLLRFPAVGEPNIQQYAQNMGLPQNRI
IFSPVAPKEEHVRRGQLADVCLDTPLCNGHTTGMDVLWAGTPMVTMPGETLASRVAASQL
TCLGCLELIAKNRQEYEDIAVKLGTDLEYLKKVRGKVWKQRISSPLFNTKQYTMELERLY
LQMWEHYAAGNKPDHMIKPVEVTESA
Structure
1W3B ; 3PE3 ; 3PE4 ; 3TAX ; 4AY5 ; 4AY6 ; 4CDR ; 4GYW ; 4GYY ; 4GZ3 ; 4GZ5 ; 4GZ6 ; 4N39 ; 4N3A ; 4N3B ; 4N3C ; 4XI9 ; 4XIF ; 5BNW ; 5C1D ; 5HGV ; 5LVV ; 5LWV ; 5NPR ; 5NPS ; 5VIE ; 5VIF ; 6E37 ; 6EOU ; 6IBO ; 6MA1 ; 6MA2 ; 6MA3 ; 6MA4 ; 6MA5 ; 6Q4M ; 6TKA
Function Catalyzes the transfer of a single N-acetylglucosamine from UDP-GlcNAc to a serine or threonine residue in cytoplasmic and nuclear proteins resulting in their modification with a beta-linked N-acetylglucosamine (O-GlcNAc). Glycosylates a large and diverse number of proteins including histone H2B, AKT1, EZH2, PFKL, KMT2E/MLL5, MAPT/TAU and HCFC1. Can regulate their cellular processes via cross-talk between glycosylation and phosphorylation or by affecting proteolytic processing. Probably by glycosylating KMT2E/MLL5, stabilizes KMT2E/MLL5 by preventing its ubiquitination. Involved in insulin resistance in muscle and adipocyte cells via glycosylating insulin signaling components and inhibiting the 'Thr-308' phosphorylation of AKT1, enhancing IRS1 phosphorylation and attenuating insulin signaling. Involved in glycolysis regulation by mediating glycosylation of 6-phosphofructokinase PFKL, inhibiting its activity. Component of a THAP1/THAP3-HCFC1-OGT complex that is required for the regulation of the transcriptional activity of RRM1. Plays a key role in chromatin structure by mediating O-GlcNAcylation of 'Ser-112' of histone H2B: recruited to CpG-rich transcription start sites of active genes via its interaction with TET proteins (TET1, TET2 or TET3). As part of the NSL complex indirectly involved in acetylation of nucleosomal histone H4 on several lysine residues. O-GlcNAcylation of 'Ser-75' of EZH2 increases its stability, and facilitating the formation of H3K27me3 by the PRC2/EED-EZH2 complex. Regulates circadian oscillation of the clock genes and glucose homeostasis in the liver. Stabilizes clock proteins ARNTL/BMAL1 and CLOCK through O-glycosylation, which prevents their ubiquitination and subsequent degradation. Promotes the CLOCK-ARNTL/BMAL1-mediated transcription of genes in the negative loop of the circadian clock such as PER1/2 and CRY1/2. O-glycosylates HCFC1 and regulates its proteolytic processing and transcriptional activity. Regulates mitochondrial motility in neurons by mediating glycosylation of TRAK1. Glycosylates HOXA1. O-glycosylates FNIP1.; [Isoform 2]: the mitochondrial isoform (mOGT) is cytotoxic and triggers apoptosis in several cell types including INS1, an insulinoma cell line.
Regulatory Network
Full List of Metabolite(s) Regulating This Protein
      Organic oxygen compounds
            Glucose Click to Show/Hide the Full List of Regulating Pair(s):   1 Pair(s)
               Detailed Information Metabo  Info click to show the details of this metabolite
               Regulating Pair Experim Info click to show the details of experiment for validating this pair [1]
                      Introduced Variation Glucose decrease (24 hours)
                      Induced Change OGT protein phosphorylation levels: increase (FC = 5)
                      Summary Introduced Variation         Induced Change 
                      Disease Status Bladder Cancer [ICD-11: 2C94]
                      Details It is reported that glucose decrease causes the increase of OGT protein phosphorylation compared with control group.
References
1 O-GlcNAc-specific antibody CTD110.6 cross-reacts with N-GlcNAc2-modified proteins induced under glucose deprivation. PLoS One. 2011 Apr 19;6(4):e18959.

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