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- EMDB-36367: Cryo-EM structure of KCTD5 in complex with Gbeta gamma subunits -
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Open data
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Basic information
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Title | Cryo-EM structure of KCTD5 in complex with Gbeta gamma subunits | |||||||||
![]() | EM density map of KCTD5_Gng2/Gnb1 complex | |||||||||
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![]() | ubiquitination / GPCR signaling / PROTEIN BINDING | |||||||||
Function / homology | ![]() Cul3-RING ubiquitin ligase complex / cullin family protein binding / Olfactory Signaling Pathway / Activation of the phototransduction cascade / protein homooligomerization / G beta:gamma signalling through PLC beta / Presynaptic function of Kainate receptors / Thromboxane signalling through TP receptor / G protein-coupled acetylcholine receptor signaling pathway / G-protein activation ...Cul3-RING ubiquitin ligase complex / cullin family protein binding / Olfactory Signaling Pathway / Activation of the phototransduction cascade / protein homooligomerization / G beta:gamma signalling through PLC beta / Presynaptic function of Kainate receptors / Thromboxane signalling through TP receptor / G protein-coupled acetylcholine receptor signaling pathway / G-protein activation / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / Prostacyclin signalling through prostacyclin receptor / Glucagon signaling in metabolic regulation / G beta:gamma signalling through CDC42 / ADP signalling through P2Y purinoceptor 12 / G beta:gamma signalling through BTK / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / Sensory perception of sweet, bitter, and umami (glutamate) taste / photoreceptor disc membrane / Adrenaline,noradrenaline inhibits insulin secretion / Glucagon-type ligand receptors / Vasopressin regulates renal water homeostasis via Aquaporins / G alpha (z) signalling events / cellular response to catecholamine stimulus / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / ADORA2B mediated anti-inflammatory cytokines production / sensory perception of taste / ADP signalling through P2Y purinoceptor 1 / adenylate cyclase-activating dopamine receptor signaling pathway / G beta:gamma signalling through PI3Kgamma / cellular response to prostaglandin E stimulus / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / GPER1 signaling / G-protein beta-subunit binding / Inactivation, recovery and regulation of the phototransduction cascade / heterotrimeric G-protein complex / G alpha (12/13) signalling events / extracellular vesicle / signaling receptor complex adaptor activity / Thrombin signalling through proteinase activated receptors (PARs) / GTPase binding / retina development in camera-type eye / Ca2+ pathway / phospholipase C-activating G protein-coupled receptor signaling pathway / G alpha (i) signalling events / fibroblast proliferation / G alpha (s) signalling events / G alpha (q) signalling events / proteasome-mediated ubiquitin-dependent protein catabolic process / Ras protein signal transduction / cell population proliferation / Extra-nuclear estrogen signaling / G protein-coupled receptor signaling pathway / lysosomal membrane / GTPase activity / synapse / protein-containing complex binding / signal transduction / extracellular exosome / identical protein binding / membrane / nucleus / plasma membrane / cytosol / cytoplasm Similarity search - Function | |||||||||
Biological species | ![]() ![]() ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.27 Å | |||||||||
![]() | Zheng S / Jiang W / Wang W / Kong Y | |||||||||
Funding support | ![]()
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![]() | ![]() Title: Structural basis for the ubiquitination of G protein βγ subunits by KCTD5/Cullin3 E3 ligase. Authors: Wentong Jiang / Wei Wang / Yinfei Kong / Sanduo Zheng / ![]() Abstract: G protein-coupled receptor (GPCR) signaling is precisely controlled to avoid overstimulation that results in detrimental consequences. Gβγ signaling is negatively regulated by a Cullin3 (Cul3)- ...G protein-coupled receptor (GPCR) signaling is precisely controlled to avoid overstimulation that results in detrimental consequences. Gβγ signaling is negatively regulated by a Cullin3 (Cul3)-dependent E3 ligase, KCTD5, which triggers ubiquitination and degradation of free Gβγ. Here, we report the cryo-electron microscopy structures of the KCTD5-Gβγ fusion complex and the KCTD7-Cul3 complex. KCTD5 in pentameric form engages symmetrically with five copies of Gβγ through its C-terminal domain. The unique pentameric assembly of the KCTD5/Cul3 E3 ligase places the ubiquitin-conjugating enzyme (E2) and the modification sites of Gβγ in close proximity and allows simultaneous transfer of ubiquitin from E2 to five Gβγ subunits. Moreover, we show that ubiquitination of Gβγ by KCTD5 is important for fine-tuning cyclic adenosine 3´,5´-monophosphate signaling of GPCRs. Our studies provide unprecedented insights into mechanisms of substrate recognition by unusual pentameric E3 ligases and highlight the KCTD family as emerging regulators of GPCR signaling. | |||||||||
History |
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Structure visualization
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 80.4 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 20.6 KB 20.6 KB | Display Display | ![]() |
Images | ![]() | 58 KB | ||
Filedesc metadata | ![]() | 6.3 KB | ||
Others | ![]() ![]() ![]() | 154 MB 151.6 MB 151.6 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 8jkbMC ![]() 8i79C M: atomic model generated by this map C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
File | ![]() | ||||||||||||||||||||
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Annotation | EM density map of KCTD5_Gng2/Gnb1 complex | ||||||||||||||||||||
Voxel size | X=Y=Z: 0.86 Å | ||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Additional map: EM density map of KCTD5 Gng2/Gnb1 complex after sharpening
File | emd_36367_additional_1.map | ||||||||||||
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Annotation | EM density map of KCTD5_Gng2/Gnb1 complex after sharpening | ||||||||||||
Projections & Slices |
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Density Histograms |
-Half map: half map of KCTD5 Gng2/Gnb1 complex
File | emd_36367_half_map_1.map | ||||||||||||
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Annotation | half map of KCTD5_Gng2/Gnb1 complex | ||||||||||||
Projections & Slices |
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Density Histograms |
-Half map: half map of KCTD5 Gng2/Gnb1 complex
File | emd_36367_half_map_2.map | ||||||||||||
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Annotation | half map of KCTD5_Gng2/Gnb1 complex | ||||||||||||
Projections & Slices |
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Density Histograms |
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Sample components
-Entire : Cryo-EM structure of KCTD5 in complex with G protein betagamma su...
Entire | Name: Cryo-EM structure of KCTD5 in complex with G protein betagamma subunits |
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Components |
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-Supramolecule #1: Cryo-EM structure of KCTD5 in complex with G protein betagamma su...
Supramolecule | Name: Cryo-EM structure of KCTD5 in complex with G protein betagamma subunits type: complex / ID: 1 / Parent: 0 / Macromolecule list: all |
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Source (natural) | Organism: ![]() ![]() |
-Macromolecule #1: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
Macromolecule | Name: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 type: protein_or_peptide / ID: 1 / Number of copies: 5 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 41.088762 KDa |
Recombinant expression | Organism: ![]() |
Sequence | String: MYPYDVPDYA YPYDVPDYAY PYDVPDYAGS GSMSELDQLR QEAEQLKNQI RDARKACADA TLSQITNNID PVGRIQMRTR RTLRGHLAK IYAMHWGTDS RLLVSASQDG KLIIWDSYTT NKVHAIPLRS SWVMTCAYAP SGNYVACGGL DNICSIYNLK T REGNVRVS ...String: MYPYDVPDYA YPYDVPDYAY PYDVPDYAGS GSMSELDQLR QEAEQLKNQI RDARKACADA TLSQITNNID PVGRIQMRTR RTLRGHLAK IYAMHWGTDS RLLVSASQDG KLIIWDSYTT NKVHAIPLRS SWVMTCAYAP SGNYVACGGL DNICSIYNLK T REGNVRVS RELAGHTGYL SCCRFLDDNQ IVTSSGDTTC ALWDIETGQQ TTTFTGHTGD VMSLSLAPDT RLFVSGACDA SA KLWDVRE GMCRQTFTGH ESDINAICFF PNGNAFATGS DDATCRLFDL RADQELMTYS HDNIICGITS VSFSKSGRLL LAG YDDFNC NVWDALKADR AGVLAGHDNR VSCLGVTDDG MAVATGSWDS FLKIWN UniProtKB: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 |
-Macromolecule #2: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
Macromolecule | Name: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2 type: protein_or_peptide / ID: 2 / Number of copies: 5 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 10.228731 KDa |
Recombinant expression | Organism: ![]() |
Sequence | String: GSALEVLFQG PGAGALEVLF QGPGSMASNN TASIAQARKL VEQLKMEANI DRIKVSKAAA DLMAYCEAHA KEDPLLTPVP ASENPFREK KFFSAIL UniProtKB: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2 |
-Macromolecule #3: BTB/POZ domain-containing protein KCTD5
Macromolecule | Name: BTB/POZ domain-containing protein KCTD5 / type: protein_or_peptide / ID: 3 / Number of copies: 5 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 30.780623 KDa |
Recombinant expression | Organism: ![]() |
Sequence | String: MGSSHHHHHH GSEDQVDPRL IDGKDYKDDD DKLEVLFQGP MAENHCELLP PAPSGLGAGL GGGLCRRCSA GMGALAQRPG GVSKWVRLN VGGTYFLTTR QTLCRDPKSF LYRLCQADPD LDSDKDETGA YLIDRDPTYF GPVLNYLRHG KLVINKDLAE E GVLEEAEF ...String: MGSSHHHHHH GSEDQVDPRL IDGKDYKDDD DKLEVLFQGP MAENHCELLP PAPSGLGAGL GGGLCRRCSA GMGALAQRPG GVSKWVRLN VGGTYFLTTR QTLCRDPKSF LYRLCQADPD LDSDKDETGA YLIDRDPTYF GPVLNYLRHG KLVINKDLAE E GVLEEAEF YNITSLIKLV KDKIRERDSR ISQMPVKHVY RVLQCQEEEL TQMVSTMSDG WKFEQLVSIG SSYNYGNEDQ AE FLCVVSK ELHNTPYGTT SEPSEKAKIL QERGSRM UniProtKB: BTB/POZ domain-containing protein KCTD5 |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Concentration | 0.32 mg/mL | |||||||||
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Buffer | pH: 7.4 Component:
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Grid | Material: GOLD / Mesh: 300 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 40 sec. | |||||||||
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 281.15 K / Instrument: FEI VITROBOT MARK IV |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 49.71 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.6 µm / Nominal defocus min: 1.0 µm |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |