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- EMDB-5755: 3D EM Reconstruction of the AKAP18-PKA Complex in a Bent Conformation -

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Basic information

Entry
Database: EMDB / ID: EMD-5755
Title3D EM Reconstruction of the AKAP18-PKA Complex in a Bent Conformation
Map dataReconstruction of AKAP18-PKA in a Bent Conformation
Sample
  • Sample: AKAP18-PKA Complex in Bent Conformation
  • Protein or peptide: A-Kinase Anchoring Protein 18
  • Protein or peptide: A-Protein Kinase Catalytic Subunit
  • Protein or peptide: A-Protein Kinase Regulatory Subunit II alpha
KeywordsA-Kinase Anchoring Protein / AKAP / AKAP18 / A-Kinase / PKA / cAMP-Dependent Kinase / Kinase / RII / PKA Regulatory Subunit II / Phosphorylation / Anchoring / Intrinsic Disorder
Function / homology
Function and homology information


spontaneous exocytosis of neurotransmitter / HDL assembly / PKA activation in glucagon signalling / CREB1 phosphorylation through the activation of Adenylate Cyclase / negative regulation of meiotic cell cycle / DARPP-32 events / Rap1 signalling / PKA activation / Vasopressin regulates renal water homeostasis via Aquaporins / Regulation of insulin secretion ...spontaneous exocytosis of neurotransmitter / HDL assembly / PKA activation in glucagon signalling / CREB1 phosphorylation through the activation of Adenylate Cyclase / negative regulation of meiotic cell cycle / DARPP-32 events / Rap1 signalling / PKA activation / Vasopressin regulates renal water homeostasis via Aquaporins / Regulation of insulin secretion / GPER1 signaling / Hedgehog 'off' state / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / exocytic vesicle / regulation of membrane repolarization / Loss of Nlp from mitotic centrosomes / Recruitment of mitotic centrosome proteins and complexes / Loss of proteins required for interphase microtubule organization from the centrosome / MAPK6/MAPK4 signaling / Recruitment of NuMA to mitotic centrosomes / Anchoring of the basal body to the plasma membrane / GLI3 is processed to GLI3R by the proteasome / AURKA Activation by TPX2 / cAMP-dependent protein kinase regulator activity / Factors involved in megakaryocyte development and platelet production / positive regulation of potassium ion transmembrane transport / CD209 (DC-SIGN) signaling / Regulation of PLK1 Activity at G2/M Transition / Interleukin-3, Interleukin-5 and GM-CSF signaling / RET signaling / regulation of protein kinase A signaling / Ion homeostasis / VEGFA-VEGFR2 Pathway / nucleotide-activated protein kinase complex / regulation of cellular respiration / regulation of protein processing / protein localization to lipid droplet / regulation of bicellular tight junction assembly / cellular response to parathyroid hormone stimulus / cAMP-dependent protein kinase inhibitor activity / beta-2 adrenergic receptor binding / cAMP-dependent protein kinase / protein kinase A binding / cellular response to cold / sperm capacitation / regulation of osteoblast differentiation / cAMP-dependent protein kinase activity / negative regulation of glycolytic process through fructose-6-phosphate / ciliary base / cAMP-dependent protein kinase complex / AMP-activated protein kinase activity / postsynaptic modulation of chemical synaptic transmission / AMP binding / cellular response to glucagon stimulus / protein kinase A regulatory subunit binding / axoneme / protein kinase A catalytic subunit binding / plasma membrane raft / small molecule binding / mesoderm formation / lateral plasma membrane / sperm flagellum / regulation of proteasomal protein catabolic process / negative regulation of smoothened signaling pathway / protein kinase A signaling / cAMP binding / cellular response to cAMP / positive regulation of gluconeogenesis / regulation of synaptic transmission, glutamatergic / negative regulation of TORC1 signaling / sperm midpiece / T-tubule / hippocampal mossy fiber to CA3 synapse / protein export from nucleus / protein serine/threonine/tyrosine kinase activity / acrosomal vesicle / positive regulation of protein export from nucleus / sarcoplasmic reticulum / neural tube closure / cellular response to glucose stimulus / regulation of protein phosphorylation / modulation of chemical synaptic transmission / neuromuscular junction / adenylate cyclase-activating G protein-coupled receptor signaling pathway / positive regulation of insulin secretion / mRNA processing / small GTPase binding / presynapse / cellular response to heat / manganese ion binding / kinase activity / postsynapse / peptidyl-serine phosphorylation / dendritic spine / regulation of cell cycle / protein kinase activity / nuclear speck / apical plasma membrane / protein domain specific binding / phosphorylation
Similarity search - Function
A-kinase anchor protein 7, RI-RII subunit-binding domain / PKA-RI-RII subunit binding domain of A-kinase anchor protein / Protein kinase A anchor protein, nuclear localisation signal domain / AKAP7 2'5' RNA ligase-like domain / cAMP-dependent protein kinase regulatory subunit / cAMP-dependent protein kinase regulatory subunit, dimerization-anchoring domain / Regulatory subunit of type II PKA R-subunit / RIIalpha, Regulatory subunit portion of type II PKA R-subunit / Cyclic phosphodiesterase / Cyclic nucleotide-binding domain signature 2. ...A-kinase anchor protein 7, RI-RII subunit-binding domain / PKA-RI-RII subunit binding domain of A-kinase anchor protein / Protein kinase A anchor protein, nuclear localisation signal domain / AKAP7 2'5' RNA ligase-like domain / cAMP-dependent protein kinase regulatory subunit / cAMP-dependent protein kinase regulatory subunit, dimerization-anchoring domain / Regulatory subunit of type II PKA R-subunit / RIIalpha, Regulatory subunit portion of type II PKA R-subunit / Cyclic phosphodiesterase / Cyclic nucleotide-binding domain signature 2. / Cyclic nucleotide-binding domain signature 1. / cAMP-dependent protein kinase catalytic subunit / Cyclic nucleotide-binding, conserved site / Cyclic nucleotide-monophosphate binding domain / Cyclic nucleotide-binding domain / cAMP/cGMP binding motif profile. / Cyclic nucleotide-binding domain / Cyclic nucleotide-binding domain superfamily / Extension to Ser/Thr-type protein kinases / AGC-kinase, C-terminal / AGC-kinase C-terminal domain profile. / RmlC-like jelly roll fold / Serine/threonine-protein kinase, active site / Serine/Threonine protein kinases active-site signature. / Protein kinase domain / Serine/Threonine protein kinases, catalytic domain / Protein kinase, ATP binding site / Protein kinases ATP-binding region signature. / Protein kinase domain profile. / Protein kinase domain / Protein kinase-like domain superfamily
Similarity search - Domain/homology
cAMP-dependent protein kinase catalytic subunit alpha / cAMP-dependent protein kinase type II-alpha regulatory subunit / A-kinase anchor protein 7 isoforms delta and gamma / cAMP-dependent protein kinase type II-alpha regulatory subunit
Similarity search - Component
Biological speciesHomo sapiens (human) / Mus musculus (house mouse)
Methodsingle particle reconstruction / negative staining / Resolution: 35.0 Å
AuthorsSmith FD / Reichow SL / Esseltine JL / Shi D / Langeberg LK / Scott JD / Gonen T
CitationJournal: Elife / Year: 2013
Title: Intrinsic disorder within an AKAP-protein kinase A complex guides local substrate phosphorylation.
Authors: F Donelson Smith / Steve L Reichow / Jessica L Esseltine / Dan Shi / Lorene K Langeberg / John D Scott / Tamir Gonen /
Abstract: Anchoring proteins sequester kinases with their substrates to locally disseminate intracellular signals and avert indiscriminate transmission of these responses throughout the cell. Mechanistic ...Anchoring proteins sequester kinases with their substrates to locally disseminate intracellular signals and avert indiscriminate transmission of these responses throughout the cell. Mechanistic understanding of this process is hampered by limited structural information on these macromolecular complexes. A-kinase anchoring proteins (AKAPs) spatially constrain phosphorylation by cAMP-dependent protein kinases (PKA). Electron microscopy and three-dimensional reconstructions of type-II PKA-AKAP18γ complexes reveal hetero-pentameric assemblies that adopt a range of flexible tripartite configurations. Intrinsically disordered regions within each PKA regulatory subunit impart the molecular plasticity that affords an ∼16 nanometer radius of motion to the associated catalytic subunits. Manipulating flexibility within the PKA holoenzyme augmented basal and cAMP responsive phosphorylation of AKAP-associated substrates. Cell-based analyses suggest that the catalytic subunit remains within type-II PKA-AKAP18γ complexes upon cAMP elevation. We propose that the dynamic movement of kinase sub-structures, in concert with the static AKAP-regulatory subunit interface, generates a solid-state signaling microenvironment for substrate phosphorylation. DOI: http://dx.doi.org/10.7554/eLife.01319.001.
History
DepositionSep 24, 2013-
Header (metadata) releaseOct 30, 2013-
Map releaseNov 13, 2013-
UpdateFeb 17, 2016-
Current statusFeb 17, 2016Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 6.35
  • Imaged by UCSF Chimera
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  • Surface view colored by radius
  • Surface level: 6.35
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-3j4q
  • Surface level: 6.35
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_5755.png

Downloads & links

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Map

FileDownload / File: emd_5755.map.gz / Format: CCP4 / Size: 6.4 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationReconstruction of AKAP18-PKA in a Bent Conformation
Voxel sizeX=Y=Z: 4.2 Å
Density
Contour LevelBy AUTHOR: 6.35 / Movie #1: 6.35
Minimum - Maximum-3.92421436 - 12.970114710000001
Average (Standard dev.)0.0 (±1.0)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions120120120
Spacing120120120
CellA=B=C: 503.99997 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z4.24.24.2
M x/y/z120120120
origin x/y/z0.0000.0000.000
length x/y/z504.000504.000504.000
α/β/γ90.00090.00090.000
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS120120120
D min/max/mean-3.92412.9700.000

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Supplemental data

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Sample components

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Entire : AKAP18-PKA Complex in Bent Conformation

EntireName: AKAP18-PKA Complex in Bent Conformation
Components
  • Sample: AKAP18-PKA Complex in Bent Conformation
  • Protein or peptide: A-Kinase Anchoring Protein 18
  • Protein or peptide: A-Protein Kinase Catalytic Subunit
  • Protein or peptide: A-Protein Kinase Regulatory Subunit II alpha

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Supramolecule #1000: AKAP18-PKA Complex in Bent Conformation

SupramoleculeName: AKAP18-PKA Complex in Bent Conformation / type: sample / ID: 1000
Oligomeric state: Hetero-pentamer composed of one AKAP18 bound to a dimer of the PKA Regulatory Subunit II and two copies of the PKA Catalytic Subunit
Number unique components: 3
Molecular weightExperimental: 240 KDa / Theoretical: 220 KDa / Method: Native PAGE

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Macromolecule #1: A-Kinase Anchoring Protein 18

MacromoleculeName: A-Kinase Anchoring Protein 18 / type: protein_or_peptide / ID: 1 / Name.synonym: AKAP18 / Number of copies: 1 / Oligomeric state: monomer / Recombinant expression: Yes
Source (natural)Organism: Homo sapiens (human) / synonym: Human
Molecular weightTheoretical: 40 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm) / Recombinant strain: Sf-9 / Recombinant plasmid: Bacmid

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Macromolecule #2: A-Protein Kinase Catalytic Subunit

MacromoleculeName: A-Protein Kinase Catalytic Subunit / type: protein_or_peptide / ID: 2 / Name.synonym: PKA C subunit / Number of copies: 2 / Oligomeric state: monomer / Recombinant expression: Yes
Source (natural)Organism: Mus musculus (house mouse) / synonym: Mouse
Molecular weightTheoretical: 40 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli) / Recombinant strain: BL21(DE3)pLysS / Recombinant plasmid: pET15a

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Macromolecule #3: A-Protein Kinase Regulatory Subunit II alpha

MacromoleculeName: A-Protein Kinase Regulatory Subunit II alpha / type: protein_or_peptide / ID: 3 / Name.synonym: PKA RIIalpha Subunit / Number of copies: 2 / Oligomeric state: dimer / Recombinant expression: Yes
Source (natural)Organism: Mus musculus (house mouse) / synonym: Mouse
Molecular weightTheoretical: 45 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli) / Recombinant strain: BL21(DE3)pLysS / Recombinant plasmid: pET28b

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Experimental details

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Structure determination

Methodnegative staining
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

Concentration0.01 mg/mL
BufferpH: 7.4
Details: 25 mM HEPES, 200 mM NaCl, 0.5 mM EDTA, 1 mM dithiothreitol.
StainingType: NEGATIVE / Details: 0.75% (w/v) uranyl formate
GridDetails: 200 mesh copper grid with thin carbon support
VitrificationCryogen name: NONE / Instrument: OTHER

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Electron microscopy

MicroscopeFEI TECNAI 12
Electron beamAcceleration voltage: 120 kV / Electron source: LAB6
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Cs: 6.3 mm / Nominal defocus max: 2.5 µm / Nominal defocus min: 1.0 µm / Nominal magnification: 52000
Sample stageSpecimen holder model: OTHER / Tilt angle max: 50
TemperatureAverage: 298 K
Alignment procedureLegacy - Astigmatism: Objective lens astigmatism was corrected at 100,000 times magnification
DateMay 1, 2012
Image recordingCategory: CCD / Film or detector model: GENERIC GATAN / Number real images: 1335 / Average electron dose: 15 e/Å2
Tilt angle min0

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Image processing

CTF correctionDetails: Each Micrograph
Final reconstructionResolution.type: BY AUTHOR / Resolution: 35.0 Å / Resolution method: FSC 0.5 CUT-OFF / Software - Name: IMAGIC, FREALIGN / Number images used: 1000
DetailsImages were processed in IMAGIC and ISAC. 3D reconstruction was done in IMAGIC and FREALIGN.

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Atomic model buiding 1

Initial modelPDB ID:

2izx


Chain - #0 - Chain ID: A / Chain - #1 - Chain ID: B
SoftwareName: Chimera
DetailsThis domain was linked to the AKAP18 central domain (PDB 2VFL) using COOT and they were fit together into the EM density.
RefinementSpace: REAL / Protocol: RIGID BODY FIT / Target criteria: cross-correlation
Output model

PDB-3j4q:
Pseudo-atomic model of the AKAP18-PKA complex in a bent conformation derived from electron microscopy

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Atomic model buiding 2

Initial modelPDB ID:

2vfl


Chain - Chain ID: A
SoftwareName: Chimera
DetailsThis domain was linked to the AKAP RII Binding Domain (PDB 2IZX) using COOT and they were fit together into the EM density.
RefinementSpace: REAL / Protocol: RIGID BODY FIT / Target criteria: cross-correlation
Output model

PDB-3j4q:
Pseudo-atomic model of the AKAP18-PKA complex in a bent conformation derived from electron microscopy

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Atomic model buiding 3

Initial modelPDB ID:

2qvs


Chain - #0 - Chain ID: A / Chain - #1 - Chain ID: B
SoftwareName: Chimera
DetailsThis domain was linked to the PKA RIIalpha D/D domain (PDB 2IZX) using COOT and they were fit together into the EM density.
RefinementSpace: REAL / Protocol: RIGID BODY FIT / Target criteria: cross-correlation
Output model

PDB-3j4q:
Pseudo-atomic model of the AKAP18-PKA complex in a bent conformation derived from electron microscopy

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