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Defective internal allosteric network imparts dysfunctional ATP/substrate-binding cooperativity in oncogenic chimera of protein kinase A

Journal Article · · Communications Biology

An aberrant fusion of the DNAJB1 and PRKACA genes generates a chimeric protein kinase (PKA-CDNAJB1) in which the J-domain of the heat shock protein 40 is fused to the catalytic α subunit of cAMP-dependent protein kinase A (PKA-C). Deceivingly, this chimeric construct appears to be fully functional, as it phosphorylates canonical substrates, forms holoenzymes, responds to cAMP activation, and recognizes the endogenous inhibitor PKI. Nonetheless, PKA-CDNAJB1 has been recognized as the primary driver of fibrolamellar hepatocellular carcinoma and is implicated in other neoplasms for which the molecular mechanisms remain elusive. Here we determined the chimera’s allosteric response to nucleotide and pseudo-substrate binding. We found that the fusion of the dynamic J-domain to PKA-C disrupts the internal allosteric network, causing dramatic attenuation of the nucleotide/PKI binding cooperativity. Our findings suggest that the reduced allosteric cooperativity exhibited by PKA-CDNAJB1 alters specific recognitions and interactions between substrates and regulatory partners contributing to dysregulation.

Research Organization:
Univ. of Utah, Salt Lake City, UT (United States)
Sponsoring Organization:
USDOE; National Institutes of Health (NIH); American Heart Association (AHA)
OSTI ID:
1817013
Journal Information:
Communications Biology, Journal Name: Communications Biology Journal Issue: 1 Vol. 4; ISSN 2399-3642
Publisher:
Springer NatureCopyright Statement
Country of Publication:
United States
Language:
English

References (63)

LINCS: A linear constraint solver for molecular simulations journal September 1997
Fibrolamellar hepatocellular carcinoma in children and adolescents journal April 2003
Is fibrolamellar carcinoma different from hepatocellular carcinoma? A US population-based study journal January 2004
Fibrolamellar carcinoma in the Carney complex: PRKAR1A loss instead of the classicDNAJB1‐PRKACAfusion journal May 2018
Inhibition of the chimeric DnaJ‐PKAc enzyme by endogenous inhibitor proteins journal April 2019
Fibrolamellar Hepatocellular Carcinoma: Mechanistic Distinction From Adult Hepatocellular Carcinoma journal March 2016
A conserved deamidation site at asn 2 in the catalytic subunit of mammalian cAMP-dependent protein kinase detected by capillary LC-MS and tandem mass spectrometry journal February 1998
NMRPipe: A multidimensional spectral processing system based on UNIX pipes journal November 1995
Rapid measurement of binding constants and heats of binding using a new titration calorimeter journal May 1989
Liberated PKA Catalytic Subunits Associate with the Membrane via Myristoylation to Preferentially Phosphorylate Membrane Substrates journal April 2017
Fibrolamellar variant of hepatocellular carcinoma does not have a better survival than conventional hepatocellular carcinoma – Results and treatment recommendations from the Childhood Liver Tumour Strategy Group (SIOPEL) experience journal August 2013
A Systematic Review: Treatment and Prognosis of Patients with Fibrolamellar Hepatocellular Carcinoma journal December 2012
Synchronous Opening and Closing Motions Are Essential for cAMP-Dependent Protein Kinase A Signaling journal December 2014
The Mechanism of ATP-Dependent Allosteric Protection of Akt Kinase Phosphorylation journal September 2015
An Isoform-Specific Myristylation Switch Targets Type II PKA Holoenzymes to Membranes journal September 2015
Uncoupling Catalytic and Binding Functions in the Cyclic AMP-Dependent Protein Kinase A journal March 2016
Structures of the PKA RIα Holoenzyme with the FLHCC Driver J-PKAcα or Wild-Type PKAcα journal May 2019
A Conserved Allosteric Pathway in Tyrosine Kinase Regulation journal August 2019
Allosteric Communication Disrupted by a Small Molecule Binding to the Imidazole Glycerol Phosphate Synthase Protein–Protein Interface journal November 2016
Adenosine cyclic 3',5'-monophosphate dependent protein kinase: kinetic mechanism for the bovine skeletal muscle catalytic subunit journal November 1982
Backbone dynamics of proteins as studied by nitrogen-15 inverse detected heteronuclear NMR spectroscopy: application to staphylococcal nuclease journal November 1989
Structure and Function of Human DnaJ Homologue Subfamily A Member 1 (DNAJA1) and Its Relationship to Pancreatic Cancer journal February 2014
Dynamics of cAMP-Dependent Protein Kinase journal August 2001
Optimization of the Additive CHARMM All-Atom Protein Force Field Targeting Improved Sampling of the Backbone ϕ, ψ and Side-Chain χ 1 and χ 2 Dihedral Angles journal August 2012
GROMACS 4:  Algorithms for Highly Efficient, Load-Balanced, and Scalable Molecular Simulation journal February 2008
Fibrolamellar Hepatocellular Carcinoma journal July 2009
DNAJB1-PRKACA is specific for fibrolamellar carcinoma journal June 2015
Cooperativity in macromolecular assembly journal July 2008
Cooperativity and biological complexity journal August 2008
Enhanced cAMP-stimulated protein kinase A activity in human fibrolamellar hepatocellular carcinoma journal March 2016
DNAJB1-PRKACA fusions occur in oncocytic pancreatic and biliary neoplasms and are not specific for fibrolamellar hepatocellular carcinoma journal April 2020
Survey of solution dynamics in Src kinase reveals allosteric cross talk between the ligand binding and regulatory sites journal December 2017
Globally correlated conformational entropy underlies positive and negative cooperativity in a kinase’s enzymatic cycle journal February 2019
Mapping allosteric communications within individual proteins journal July 2020
Conformational Landscape of the PRKACA-DNAJB1 Chimeric Kinase, the Driver for Fibrolamellar Hepatocellular Carcinoma journal January 2018
A Tool Set to Map Allosteric Networks through the NMR Chemical Shift Covariance Analysis journal December 2014
NMR mapping of protein conformational landscapes using coordinated behavior of chemical shifts upon ligand binding journal January 2014
Recurrent Rearrangements in PRKACA and PRKACB in Intraductal Oncocytic Papillary Neoplasms of the Pancreas and Bile Duct journal February 2020
Carney Complex journal November 2018
Comparison of simple potential functions for simulating liquid water journal July 1983
Particle mesh Ewald: An N ⋅log( N ) method for Ewald sums in large systems journal June 1993
Allosteric cooperativity in protein kinase A journal January 2008
Mapping allostery through the covariance analysis of NMR chemical shifts journal March 2011
Tracing an allosteric pathway regulating the activity of the HslV protease journal January 2014
Dynamic architecture of a protein kinase journal October 2014
Structural insights into mis-regulation of protein kinase A in human tumors journal January 2015
Transcriptomic characterization of fibrolamellar hepatocellular carcinoma journal October 2015
Dysfunctional conformational dynamics of protein kinase A induced by a lethal mutant of phospholamban hinder phosphorylation journal March 2015
Mutation of a kinase allosteric node uncouples dynamics linked to phosphotransfer journal January 2017
DNAJB1–PRKACA fusion kinase interacts with β-catenin and the liver regenerative response to drive fibrolamellar hepatocellular carcinoma journal November 2017
NMRFAM-SPARKY: enhanced software for biomolecular NMR spectroscopy journal December 2014
Genomic analysis of fibrolamellar hepatocellular carcinoma journal August 2014
FoXS: a web server for rapid computation and fitting of SAXS profiles journal May 2010
Crystal Structure and Pair Potentials: A Molecular-Dynamics Study journal October 1980
2.2 Å refined crystal structure of the catalytic subunit of cAMP-dependent protein kinase complexed with MnATP and a peptide inhibitor journal May 1993
Molecular genomic landscapes of hepatobiliary cancer journal April 2018
Cushing’s syndrome driver mutation disrupts protein kinase A allosteric network, altering both regulation and substrate specificity journal August 2019
Detection of a Recurrent DNAJB1-PRKACA Chimeric Transcript in Fibrolamellar Hepatocellular Carcinoma journal February 2014
Structure of a peptide inhibitor bound to the catalytic subunit of cyclic adenosine monophosphate-dependent protein kinase journal July 1991
The protein kinase family: conserved features and deduced phylogeny of the catalytic domains journal July 1988
Conformational states dynamically populated by a kinase determine its function journal October 2020
Molecular Dynamics Simulations and Dynamic Network Analysis Reveal the Allosteric Unbinding of Monobody to H-Ras Triggered by R135K Mutation journal October 2017
An acquired scaffolding function of the DNAJ-PKAc fusion contributes to oncogenic signaling in fibrolamellar carcinoma journal May 2019