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- PDB-6wjf: PKA RIIbeta holoenzyme with DnaJB1-PKAc fusion in fibrolamellar h... -

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Basic information

Entry
Database: PDB / ID: 6wjf
TitlePKA RIIbeta holoenzyme with DnaJB1-PKAc fusion in fibrolamellar hepatoceullar carcinoma
Components
  • DnaJ homolog subfamily B member 1,cAMP-dependent protein kinase catalytic subunit alpha fusion
  • cAMP-dependent protein kinase type II-beta regulatory subunit
KeywordsSIGNALING PROTEIN / fibrolamellar hepatoceullar carcinoma / PKA / cAMP / Kinase
Function / homology
Function and homology information


PKA activation in glucagon signalling / CREB1 phosphorylation through the activation of Adenylate Cyclase / DARPP-32 events / : / GPER1 signaling / Loss of Nlp from mitotic centrosomes / Recruitment of mitotic centrosome proteins and complexes / Loss of proteins required for interphase microtubule organization from the centrosome / Recruitment of NuMA to mitotic centrosomes / Anchoring of the basal body to the plasma membrane ...PKA activation in glucagon signalling / CREB1 phosphorylation through the activation of Adenylate Cyclase / DARPP-32 events / : / GPER1 signaling / Loss of Nlp from mitotic centrosomes / Recruitment of mitotic centrosome proteins and complexes / Loss of proteins required for interphase microtubule organization from the centrosome / Recruitment of NuMA to mitotic centrosomes / Anchoring of the basal body to the plasma membrane / AURKA Activation by TPX2 / Factors involved in megakaryocyte development and platelet production / Regulation of PLK1 Activity at G2/M Transition / Hedgehog 'off' state / PKA activation / response to antipsychotic drug / PKA-mediated phosphorylation of CREB / PKA-mediated phosphorylation of key metabolic factors / cAMP-dependent protein kinase regulator activity / ROBO receptors bind AKAP5 / sperm head / HDL assembly / negative regulation of inclusion body assembly / channel activator activity / mitochondrial protein catabolic process / Regulation of glycolysis by fructose 2,6-bisphosphate metabolism / nucleotide-activated protein kinase complex / cell communication by electrical coupling involved in cardiac conduction / high-density lipoprotein particle assembly / Rap1 signalling / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / Vasopressin regulates renal water homeostasis via Aquaporins / negative regulation of cAMP/PKA signal transduction / cAMP-dependent protein kinase inhibitor activity / cAMP-dependent protein kinase / regulation of protein processing / intracellular potassium ion homeostasis / cAMP-dependent protein kinase activity / Loss of phosphorylation of MECP2 at T308 / protein localization to lipid droplet / CREB1 phosphorylation through the activation of Adenylate Cyclase / cAMP-dependent protein kinase complex / regulation of bicellular tight junction assembly / cellular response to parathyroid hormone stimulus / PKA activation / negative regulation of interleukin-2 production / regulation of osteoblast differentiation / cellular response to cold / sperm capacitation / ciliary base / negative regulation of glycolytic process through fructose-6-phosphate / Triglyceride catabolism / protein kinase A regulatory subunit binding / protein kinase A catalytic subunit binding / ATPase activator activity / : / mesoderm formation / RET signaling / sperm flagellum / cAMP/PKA signal transduction / Regulation of MECP2 expression and activity / plasma membrane raft / Interleukin-3, Interleukin-5 and GM-CSF signaling / PKA activation in glucagon signalling / DARPP-32 events / regulation of proteasomal protein catabolic process / regulation of cardiac conduction / Regulation of HSF1-mediated heat shock response / HSF1-dependent transactivation / regulation of cardiac muscle contraction / response to unfolded protein / regulation of macroautophagy / postsynaptic modulation of chemical synaptic transmission / regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion / Attenuation phase / forebrain development / vascular endothelial cell response to laminar fluid shear stress / renal water homeostasis / cAMP binding / transcription regulator inhibitor activity / Hedgehog 'off' state / regulation of cellular response to heat / Ion homeostasis / sperm midpiece / positive regulation of phagocytosis / negative regulation of TORC1 signaling / cellular response to epinephrine stimulus / calcium channel complex / positive regulation of gluconeogenesis / Mitochondrial protein degradation / protein folding chaperone / protein serine/threonine/tyrosine kinase activity / Loss of Nlp from mitotic centrosomes / Loss of proteins required for interphase microtubule organization from the centrosome / Hsp70 protein binding / CD209 (DC-SIGN) signaling / Recruitment of mitotic centrosome proteins and complexes / cellular response to glucagon stimulus / positive regulation of calcium-mediated signaling / regulation of heart rate
Similarity search - Function
: / cAMP-dependent protein kinase regulatory subunit / HSP40/DnaJ peptide-binding / Chaperone DnaJ, C-terminal / DnaJ C terminal domain / 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 / : / Nt-dnaJ domain signature. ...: / cAMP-dependent protein kinase regulatory subunit / HSP40/DnaJ peptide-binding / Chaperone DnaJ, C-terminal / DnaJ C terminal domain / 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 / : / Nt-dnaJ domain signature. / DnaJ domain, conserved site / DnaJ domain / DnaJ molecular chaperone homology domain / dnaJ domain profile. / Cyclic nucleotide-binding domain signature 2. / Chaperone J-domain superfamily / DnaJ domain / 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 type II-beta regulatory subunit / cAMP-dependent protein kinase catalytic subunit alpha / DnaJ homolog subfamily B member 1
Similarity search - Component
Biological speciesHomo sapiens (human)
Rattus norvegicus (Norway rat)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 7.5 Å
AuthorsLu, T.-W. / Aoto, P.C. / Weng, J.-H. / Nielsen, C. / Cash, J.N. / Hall, J. / Zhang, P. / Simon, S.M. / Cianfrocco, M.A. / Taylor, S.S.
Funding support United States, 3items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)GM130389 United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)GM34921 United States
National Institutes of Health/Office of the DirectorS10OD020011 United States
CitationJournal: PLoS Biol / Year: 2020
Title: Structural analyses of the PKA RIIβ holoenzyme containing the oncogenic DnaJB1-PKAc fusion protein reveal protomer asymmetry and fusion-induced allosteric perturbations in fibrolamellar hepatocellular carcinoma.
Authors: Tsan-Wen Lu / Phillip C Aoto / Jui-Hung Weng / Cole Nielsen / Jennifer N Cash / James Hall / Ping Zhang / Sanford M Simon / Michael A Cianfrocco / Susan S Taylor /
Abstract: When the J-domain of the heat shock protein DnaJB1 is fused to the catalytic (C) subunit of cAMP-dependent protein kinase (PKA), replacing exon 1, this fusion protein, J-C subunit (J-C), becomes the ...When the J-domain of the heat shock protein DnaJB1 is fused to the catalytic (C) subunit of cAMP-dependent protein kinase (PKA), replacing exon 1, this fusion protein, J-C subunit (J-C), becomes the driver of fibrolamellar hepatocellular carcinoma (FL-HCC). Here, we use cryo-electron microscopy (cryo-EM) to characterize J-C bound to RIIβ, the major PKA regulatory (R) subunit in liver, thus reporting the first cryo-EM structure of any PKA holoenzyme. We report several differences in both structure and dynamics that could not be captured by the conventional crystallography approaches used to obtain prior structures. Most striking is the asymmetry caused by the absence of the second cyclic nucleotide binding (CNB) domain and the J-domain in one of the RIIβ:J-C protomers. Using molecular dynamics (MD) simulations, we discovered that this asymmetry is already present in the wild-type (WT) RIIβ2C2 but had been masked in the previous crystal structure. This asymmetry may link to the intrinsic allosteric regulation of all PKA holoenzymes and could also explain why most disease mutations in PKA regulatory subunits are dominant negative. The cryo-EM structure, combined with small-angle X-ray scattering (SAXS), also allowed us to predict the general position of the Dimerization/Docking (D/D) domain, which is essential for localization and interacting with membrane-anchored A-Kinase-Anchoring Proteins (AKAPs). This position provides a multivalent mechanism for interaction of the RIIβ holoenzyme with membranes and would be perturbed in the oncogenic fusion protein. The J-domain also alters several biochemical properties of the RIIβ holoenzyme: It is easier to activate with cAMP, and the cooperativity is reduced. These results provide new insights into how the finely tuned allosteric PKA signaling network is disrupted by the oncogenic J-C subunit, ultimately leading to the development of FL-HCC.
History
DepositionApr 13, 2020Deposition site: RCSB / Processing site: RCSB
Revision 1.0Dec 2, 2020Provider: repository / Type: Initial release
Revision 1.1Jun 16, 2021Group: Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _citation_author.identifier_ORCID / _citation_author.name
Revision 1.2Mar 6, 2024Group: Data collection / Database references / Category: chem_comp_atom / chem_comp_bond / database_2
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession

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Assembly

Deposited unit
A: DnaJ homolog subfamily B member 1,cAMP-dependent protein kinase catalytic subunit alpha fusion
B: DnaJ homolog subfamily B member 1,cAMP-dependent protein kinase catalytic subunit alpha fusion
C: cAMP-dependent protein kinase type II-beta regulatory subunit
D: cAMP-dependent protein kinase type II-beta regulatory subunit


Theoretical massNumber of molelcules
Total (without water)187,0324
Polymers187,0324
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: SAXS, The structure fits the experimental SAXS data well with chi^2=1.2900.
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area9250 Å2
ΔGint-29 kcal/mol
Surface area69180 Å2

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Components

#1: Protein DnaJ homolog subfamily B member 1,cAMP-dependent protein kinase catalytic subunit alpha fusion / DnaJ protein homolog 1 / Heat shock 40 kDa protein 1 / Heat shock protein 40 / Human DnaJ protein 1 ...DnaJ protein homolog 1 / Heat shock 40 kDa protein 1 / Heat shock protein 40 / Human DnaJ protein 1 / hDj-1 / PKA C-alpha


Mass: 47337.984 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: DNAJB1, DNAJ1, HDJ1, HSPF1, PRKACA, PKACA / Production host: Escherichia coli (E. coli)
References: UniProt: P25685, UniProt: P17612, cAMP-dependent protein kinase
#2: Protein cAMP-dependent protein kinase type II-beta regulatory subunit


Mass: 46177.852 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Rattus norvegicus (Norway rat) / Gene: Prkar2b / Production host: Escherichia coli (E. coli) / References: UniProt: P12369

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

Component
IDNameTypeEntity IDParent-IDSource
1PKA RIIbeta holoenzyme with DnaJB1-PKAc fusion in fibrolamellar hepatoceullar carcinomaCOMPLEXall0RECOMBINANT
2DnaJ homolog subfamily B member 1,cAMP-dependent protein kinase catalytic subunit alpha fusionCOMPLEX#11RECOMBINANT
3cAMP-dependent protein kinase type II-beta regulatory subunitCOMPLEX#21RECOMBINANT
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
22Homo sapiens (human)9606
33Rattus norvegicus (Norway rat)10116
Source (recombinant)
IDEntity assembly-IDOrganismNcbi tax-ID
22Escherichia coli (E. coli)562
33Escherichia coli (E. coli)562
Buffer solutionpH: 5.8
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD
Image recordingElectron dose: 80 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 SUMMIT (4k x 4k)

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Processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 7.5 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 11182 / Symmetry type: POINT

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