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 / 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 / response to antipsychotic drug / 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 / negative regulation of cAMP/PKA signal transduction / Vasopressin regulates renal water homeostasis via Aquaporins / cAMP-dependent protein kinase inhibitor activity / cAMP-dependent protein kinase / regulation of protein processing / 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 / regulation of bicellular tight junction assembly / cAMP-dependent protein kinase complex / cellular response to parathyroid hormone stimulus / PKA activation / negative regulation of interleukin-2 production / regulation of osteoblast differentiation / cellular response to cold / sperm capacitation / negative regulation of glycolytic process through fructose-6-phosphate / ciliary base / Triglyceride catabolism / protein kinase A regulatory subunit binding / protein kinase A catalytic subunit binding / forebrain development / intracellular potassium ion homeostasis / ATPase activator activity / : / mesoderm formation / RET signaling / cAMP/PKA signal transduction / Regulation of MECP2 expression and activity / Interleukin-3, Interleukin-5 and GM-CSF signaling / plasma membrane raft / PKA activation in glucagon signalling / DARPP-32 events / regulation of proteasomal protein catabolic process / regulation of cardiac conduction / HSF1-dependent transactivation / Regulation of HSF1-mediated heat shock response / regulation of cardiac muscle contraction / response to unfolded protein / regulation of macroautophagy / sperm flagellum / regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion / Attenuation phase / postsynaptic modulation of chemical synaptic transmission / 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 / negative regulation of TORC1 signaling / Hsp70 protein binding / cellular response to epinephrine stimulus / calcium channel complex / positive regulation of gluconeogenesis / Mitochondrial protein degradation / protein folding chaperone / protein serine/threonine/tyrosine kinase activity / cellular response to glucagon stimulus / Loss of Nlp from mitotic centrosomes / Loss of proteins required for interphase microtubule organization from the centrosome / CD209 (DC-SIGN) signaling / Recruitment of mitotic centrosome proteins and complexes / acrosomal vesicle / positive regulation of calcium-mediated signaling / regulation of heart rate 類似検索 - 分子機能
: / 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 類似検索 - ドメイン・相同性
cAMP-dependent protein kinase type II-beta regulatory subunit / cAMP-dependent protein kinase catalytic subunit alpha / DnaJ homolog subfamily B member 1 類似検索 - 構成要素
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
GM130389
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
GM34921
米国
National Institutes of Health/Office of the Director
S10OD020011
米国
引用
ジャーナル: PLoS Biol / 年: 2020 タイトル: Structural analyses of the PKA RIIβ holoenzyme containing the oncogenic DnaJB1-PKAc fusion protein reveal protomer asymmetry and fusion-induced allosteric perturbations in ...タイトル: 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. 著者: 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 / 要旨: 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.
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
根拠: SAXS, The structure fits the experimental SAXS data well with chi^2=1.2900.
タイプ
名称
対称操作
数
identity operation
1_555
1
Buried area
9250 Å2
ΔGint
-29 kcal/mol
Surface area
69180 Å2
-
要素
#1: タンパク質
DnaJhomologsubfamilyBmember1,cAMP-dependentproteinkinasecatalyticsubunitalphafusion / 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