+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-23806 | |||||||||
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Title | Structure of yeast Ubr1 in complex with Ubc2 and N-degron | |||||||||
Map data | ||||||||||
Sample |
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Keywords | Ubiquitin E3 ligase / ubiquitination / Ubr1 / Ubc2 / Degron / N-end rule / TRANSFERASE | |||||||||
Function / homology | Function and homology information MUB1-RAD6-UBR2 ubiquitin ligase complex / RAD6-UBR2 ubiquitin ligase complex / Rad6-Rad18 complex / regulation of dipeptide transport / UBR1-RAD6 ubiquitin ligase complex / sno(s)RNA transcription / error-free postreplication DNA repair / proteasome regulatory particle binding / stress-induced homeostatically regulated protein degradation pathway / ubiquitin-dependent protein catabolic process via the N-end rule pathway ...MUB1-RAD6-UBR2 ubiquitin ligase complex / RAD6-UBR2 ubiquitin ligase complex / Rad6-Rad18 complex / regulation of dipeptide transport / UBR1-RAD6 ubiquitin ligase complex / sno(s)RNA transcription / error-free postreplication DNA repair / proteasome regulatory particle binding / stress-induced homeostatically regulated protein degradation pathway / ubiquitin-dependent protein catabolic process via the N-end rule pathway / HULC complex / meiotic DNA double-strand break formation / Synthesis of active ubiquitin: roles of E1 and E2 enzymes / mitochondria-associated ubiquitin-dependent protein catabolic process / cytoplasm protein quality control by the ubiquitin-proteasome system / E3 ubiquitin ligases ubiquitinate target proteins / telomere maintenance via recombination / proteasome regulatory particle, base subcomplex / ribosome-associated ubiquitin-dependent protein catabolic process / DNA duplex unwinding / E2 ubiquitin-conjugating enzyme / sporulation resulting in formation of a cellular spore / error-free translesion synthesis / proteasome binding / protein monoubiquitination / ubiquitin conjugating enzyme activity / Antigen processing: Ubiquitination & Proteasome degradation / cellular response to unfolded protein / subtelomeric heterochromatin formation / error-prone translesion synthesis / mitotic G1 DNA damage checkpoint signaling / ubiquitin ligase complex / ERAD pathway / Maturation of protein E / Maturation of protein E / ER Quality Control Compartment (ERQC) / Myoclonic epilepsy of Lafora / IRAK2 mediated activation of TAK1 complex / Alpha-protein kinase 1 signaling pathway / FLT3 signaling by CBL mutants / Prevention of phagosomal-lysosomal fusion / IRAK1 recruits IKK complex / IRAK1 recruits IKK complex upon TLR7/8 or 9 stimulation / Glycogen synthesis / IRAK2 mediated activation of TAK1 complex upon TLR7/8 or 9 stimulation / TICAM1,TRAF6-dependent induction of TAK1 complex / Regulation of TBK1, IKKε (IKBKE)-mediated activation of IRF3, IRF7 / Regulation of TBK1, IKKε-mediated activation of IRF3, IRF7 upon TLR3 ligation / Membrane binding and targetting of GAG proteins / Endosomal Sorting Complex Required For Transport (ESCRT) / Negative regulation of FLT3 / Constitutive Signaling by NOTCH1 HD Domain Mutants / PTK6 Regulates RTKs and Their Effectors AKT1 and DOK1 / TICAM1-dependent activation of IRF3/IRF7 / NOTCH2 Activation and Transmission of Signal to the Nucleus / Regulation of FZD by ubiquitination / APC/C:Cdc20 mediated degradation of Cyclin B / p75NTR recruits signalling complexes / VLDLR internalisation and degradation / Downregulation of ERBB4 signaling / TRAF6-mediated induction of TAK1 complex within TLR4 complex / TRAF6 mediated IRF7 activation in TLR7/8 or 9 signaling / APC-Cdc20 mediated degradation of Nek2A / Regulation of innate immune responses to cytosolic DNA / InlA-mediated entry of Listeria monocytogenes into host cells / NF-kB is activated and signals survival / Regulation of pyruvate metabolism / Downregulation of ERBB2:ERBB3 signaling / NRIF signals cell death from the nucleus / Pexophagy / Regulation of PTEN localization / Regulation of BACH1 activity / Activated NOTCH1 Transmits Signal to the Nucleus / Synthesis of active ubiquitin: roles of E1 and E2 enzymes / Translesion synthesis by REV1 / TICAM1, RIP1-mediated IKK complex recruitment / MAP3K8 (TPL2)-dependent MAPK1/3 activation / Translesion synthesis by POLK / Downregulation of TGF-beta receptor signaling / Activation of IRF3, IRF7 mediated by TBK1, IKKε (IKBKE) / Translesion synthesis by POLI / JNK (c-Jun kinases) phosphorylation and activation mediated by activated human TAK1 / Gap-filling DNA repair synthesis and ligation in GG-NER / IKK complex recruitment mediated by RIP1 / InlB-mediated entry of Listeria monocytogenes into host cell / Regulation of activated PAK-2p34 by proteasome mediated degradation / Josephin domain DUBs / PINK1-PRKN Mediated Mitophagy / TGF-beta receptor signaling in EMT (epithelial to mesenchymal transition) / N-glycan trimming in the ER and Calnexin/Calreticulin cycle / TNFR1-induced NF-kappa-B signaling pathway / Autodegradation of Cdh1 by Cdh1:APC/C / APC/C:Cdc20 mediated degradation of Securin / TCF dependent signaling in response to WNT / SCF-beta-TrCP mediated degradation of Emi1 / Asymmetric localization of PCP proteins / NIK-->noncanonical NF-kB signaling / Regulation of NF-kappa B signaling / Ubiquitin-dependent degradation of Cyclin D / activated TAK1 mediates p38 MAPK activation Similarity search - Function | |||||||||
Biological species | Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (yeast) / Homo sapiens (human) / Saccharomyces cerevisiae S288C (yeast) | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.35 Å | |||||||||
Authors | Pan M / Zheng Q | |||||||||
Funding support | 1 items
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Citation | Journal: Nature / Year: 2021 Title: Structural insights into Ubr1-mediated N-degron polyubiquitination. Authors: Man Pan / Qingyun Zheng / Tian Wang / Lujun Liang / Junxiong Mao / Chong Zuo / Ruichao Ding / Huasong Ai / Yuan Xie / Dong Si / Yuanyuan Yu / Lei Liu / Minglei Zhao / Abstract: The N-degron pathway targets proteins that bear a destabilizing residue at the N terminus for proteasome-dependent degradation. In yeast, Ubr1-a single-subunit E3 ligase-is responsible for the Arg/N- ...The N-degron pathway targets proteins that bear a destabilizing residue at the N terminus for proteasome-dependent degradation. In yeast, Ubr1-a single-subunit E3 ligase-is responsible for the Arg/N-degron pathway. How Ubr1 mediates the initiation of ubiquitination and the elongation of the ubiquitin chain in a linkage-specific manner through a single E2 ubiquitin-conjugating enzyme (Ubc2) remains unknown. Here we developed chemical strategies to mimic the reaction intermediates of the first and second ubiquitin transfer steps, and determined the cryo-electron microscopy structures of Ubr1 in complex with Ubc2, ubiquitin and two N-degron peptides, representing the initiation and elongation steps of ubiquitination. Key structural elements, including a Ubc2-binding region and an acceptor ubiquitin-binding loop on Ubr1, were identified and characterized. These structures provide mechanistic insights into the initiation and elongation of ubiquitination catalysed by Ubr1. | |||||||||
History |
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-Structure visualization
Movie |
Movie viewer |
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Structure viewer | EM map: SurfViewMolmilJmol/JSmol |
Supplemental images |
-Downloads & links
-EMDB archive
Map data | emd_23806.map.gz | 40.6 MB | EMDB map data format | |
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Header (meta data) | emd-23806-v30.xml emd-23806.xml | 22.5 KB 22.5 KB | Display Display | EMDB header |
FSC (resolution estimation) | emd_23806_fsc.xml | 8.6 KB | Display | FSC data file |
Images | emd_23806.png | 186.2 KB | ||
Masks | emd_23806_msk_1.map | 52.7 MB | Mask map | |
Filedesc metadata | emd-23806.cif.gz | 7.1 KB | ||
Others | emd_23806_additional_1.map.gz emd_23806_half_map_1.map.gz emd_23806_half_map_2.map.gz | 49.1 MB 40.8 MB 40.8 MB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-23806 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-23806 | HTTPS FTP |
-Validation report
Summary document | emd_23806_validation.pdf.gz | 916 KB | Display | EMDB validaton report |
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Full document | emd_23806_full_validation.pdf.gz | 915.5 KB | Display | |
Data in XML | emd_23806_validation.xml.gz | 14.2 KB | Display | |
Data in CIF | emd_23806_validation.cif.gz | 20.1 KB | Display | |
Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-23806 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-23806 | HTTPS FTP |
-Related structure data
Related structure data | 7mexMC 7meyC C: citing same article (ref.) M: atomic model generated by this map |
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Similar structure data | |
EM raw data | EMPIAR-10886 (Title: Single-particle cryoEM data of yeast Ubr1-Ubc2-Ub-N-degron complex (initiation) Data size: 5.7 TB Data #1: Unaligned movie data of yeast Ubr1-Ubc2-Ub-N-degron complex (initiation complex) [micrographs - multiframe]) |
-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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Related items in Molecule of the Month |
-Map
File | Download / File: emd_23806.map.gz / Format: CCP4 / Size: 52.7 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.063 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
-Mask #1
File | emd_23806_msk_1.map | ||||||||||||
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-Additional map: #1
File | emd_23806_additional_1.map | ||||||||||||
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Density Histograms |
-Half map: #2
File | emd_23806_half_map_1.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Half map: #1
File | emd_23806_half_map_2.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Sample components
-Entire : yeast Ubr1 in complex with Ubc2 and N-degron
Entire | Name: yeast Ubr1 in complex with Ubc2 and N-degron |
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Components |
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-Supramolecule #1: yeast Ubr1 in complex with Ubc2 and N-degron
Supramolecule | Name: yeast Ubr1 in complex with Ubc2 and N-degron / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#4 |
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Source (natural) | Organism: Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (yeast) |
-Macromolecule #1: Ubiquitin
Macromolecule | Name: Ubiquitin / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: Homo sapiens (human) |
Molecular weight | Theoretical: 8.622922 KDa |
Sequence | String: MQIFVKTLTG KTITLEVEPS DTIENVKAKI QDKEGIPPDQ QRLIFAGKQL EDGRTLSDYN IQKESTLHLV LRLRGC UniProtKB: Polyubiquitin-C |
-Macromolecule #2: Ubiquitin-conjugating enzyme E2 2
Macromolecule | Name: Ubiquitin-conjugating enzyme E2 2 / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO / EC number: E2 ubiquitin-conjugating enzyme |
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Source (natural) | Organism: Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (yeast) Strain: ATCC 204508 / S288c |
Molecular weight | Theoretical: 17.203389 KDa |
Recombinant expression | Organism: Saccharomyces cerevisiae S288C (yeast) |
Sequence | String: TPARRRLMRD FKRMKEDAPP GVSASPLPDN VMVWNAMIIG PADTPYEDGT FRLLLEFDEE YPNKPPHVKF LSEMFHPNVY ANGEICLDI LQNRWTPTYD VASILTSIQS LFNDPNPASP ANVEAATLFK DHKSQYVKRV KETVEKSWED D UniProtKB: Ubiquitin-conjugating enzyme E2 2 |
-Macromolecule #3: N-degron
Macromolecule | Name: N-degron / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: Saccharomyces cerevisiae S288C (yeast) |
Molecular weight | Theoretical: 4.571223 KDa |
Sequence | String: RHGSGSGAWL LPVSLVKRKT TLAPNTQTAS PPSYRALADS LMQ |
-Macromolecule #4: E3 ubiquitin-protein ligase UBR1
Macromolecule | Name: E3 ubiquitin-protein ligase UBR1 / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO / EC number: RING-type E3 ubiquitin transferase |
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Source (natural) | Organism: Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (yeast) Strain: ATCC 204508 / S288c |
Molecular weight | Theoretical: 225.10275 KDa |
Recombinant expression | Organism: Saccharomyces cerevisiae S288C (yeast) |
Sequence | String: MSVADDDLGS LQGHIRRTLR SIHNLPYFRY TRGPTERADM SRALKEFIYR YLYFVISNSG ENLPTLFNAH PKQKLSNPEL TVFPDSLED AVDIDKITSQ QTIPFYKIDE SRIGDVHKHT GRNCGRKFKI GEPLYRCHEC GCDDTCVLCI HCFNPKDHVN H HVCTDICT ...String: MSVADDDLGS LQGHIRRTLR SIHNLPYFRY TRGPTERADM SRALKEFIYR YLYFVISNSG ENLPTLFNAH PKQKLSNPEL TVFPDSLED AVDIDKITSQ QTIPFYKIDE SRIGDVHKHT GRNCGRKFKI GEPLYRCHEC GCDDTCVLCI HCFNPKDHVN H HVCTDICT EFTSGICDCG DEEAWNSPLH CKAEEQENDI SEDPATNADI KEEDVWNDSV NIALVELVLA EVFDYFIDVF NQ NIEPLPT IQKDITIKLR EMTQQGKMYE RAQFLNDLKY ENDYMFDGTT TAKTSPSNSP EASPSLAKID PENYTVIIYN DEY HNYSQA TTALRQGVPD NVHIDLLTSR IDGEGRAMLK CSQDLSSVLG GFFAVQTNGL SATLTSWSEY LHQETCKYII LWIT HCLNI PNSSFQTTFR NMMGKTLCSE YLNATECRDM TPVVEKYFSN KFDKNDPYRY IDLSILADGN QIPLGHHKIL PESST HSLS PLINDVETPT SRTYSNTRLQ HILYFDNRYW KRLRKDIQNV IIPTLASSNL YKPIFCQQVV EIFNHITRSV AYMDRE PQL TAIRECVVQL FTCPTNAKNI FENQSFLDIV WSIIDIFKEF CKVEGGVLIW QRVQKSNLTK SYSISFKQGL YTVETLL SK VHDPNIPLRP KEIISLLTLC KLFNGAWKIK RKEGEHVLHE DQNFISYLEY TTSIYSIIQT AEKVSEKSKD SIDSKLFL N AIRIISSFLG NRSLTYKLIY DSHEVIKFSV SHERVAFMNP LQTMLSFLIE KVSLKDAYEA LEDCSDFLKI SDFSLRSVV LCSQIDVGFW VRNGMSVLHQ ASYYKNNPEL GSYSRDIHLN QLAILWERDD IPRIIYNILD RWELLDWFTG EVDYQHTVYE DKISFIIQQ FIAFIYQILT ERQYFKTFSS LKDRRMDQIK NSIIYNLYMK PLSYSKLLRS VPDYLTEDTT EFDEALEEVS V FVEPKGLA DNGVFKLKAS LYAKVDPLKL LNLENEFESS ATIIKSHLAK DKDEIAKVVL IPQVSIKQLD KDALNLGAFT RN TVFAKVV YKLLQVCLDM EDSTFLNELL HLVHGIFRDD ELINGKDSIP EAYLSKPICN LLLSIANAKS DVFSESIVRK ADY LLEKMI MKKPNELFES LIASFGNQYV NDYKDKKLRQ GVNLQETEKE RKRRLAKKHQ ARLLAKFNNQ QTKFMKEHES EFDE QDNDV DMVGEKVYES EDFTCALCQD SSSTDFFVIP AYHDHSPIFR PGNIFNPNEF MPMWDGFYND DEKQAYIDDD VLEAL KENG SCGSRKVFVS CNHHIHHNCF KRYVQKKRFS SNAFICPLCQ TFSNCTLPLC QTSKANTGLS LDMFLESELS LDTLSR LFK PFTEENYRTI NSIFSLMISQ CQGFDKAVRK RANFSHKDVS LILSVHWANT ISMLEIASRL EKPYSISFFR SREQKYK TL KNILVCIMLF TFVIGKPSME FEPYPQQPDT VWNQNQLFQY IVRSALFSPV SLRQTVTEAL TTFSRQFLRD FLQGLSDA E QVTKLYAKAS KIGDVLKVSE QMLFALRTIS DVRMEGLDSE SIIYDLAYTF LLKSLLPTIR RCLVFIKVLH ELVKDSENE TLVINGHEVE EELEFEDTAE FVNKALKMIT EKESLVDLLT TQESIVSHPY LENIPYEYCG IIKLIDLSKY LNTYVTQSKE IKLREERSQ HMKNADNRLD FKICLTCGVK VHLRADRHEM TKHLNKNCFK PFGAFLMPNS SEVCLHLTQP PSNIFISAPY L NSHGEVGR NAMRRGDLTT LNLKRYEHLN RLWINNEIPG YISRVMGDEF RVTILSNGFL FAFNREPRPR RIPPTDEDDE DM EEGEDGF FTEGNDEMDV DDETGQAANL FGVGAEGIAG GGVRDFFQFF ENFRNTLQPQ GNGDDDAPQN PPPILQFLGP QFD GATIIR NTNPRNLDED DSDDNDDSDE REIW UniProtKB: E3 ubiquitin-protein ligase UBR1 |
-Macromolecule #5: ZINC ION
Macromolecule | Name: ZINC ION / type: ligand / ID: 5 / Number of copies: 7 / Formula: ZN |
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Molecular weight | Theoretical: 65.409 Da |
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Buffer | pH: 8 |
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Vitrification | Cryogen name: ETHANE |
-Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K3 (6k x 4k) / Average electron dose: 48.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
Electron optics | C2 aperture diameter: 70.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm |
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
+Image processing
-Atomic model buiding 1
Refinement | Space: REAL / Protocol: AB INITIO MODEL |
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Output model | PDB-7mex: |