CCND1 and DUSP9 Are Promising Druggable Targets for Treating
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Transcriptomic Analysis of Native Versus Cultured Human and Mouse Dorsal Root Ganglia Focused on Pharmacological Targets Short
bioRxiv preprint doi: https://doi.org/10.1101/766865; this version posted September 12, 2019. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY-ND 4.0 International license. Transcriptomic analysis of native versus cultured human and mouse dorsal root ganglia focused on pharmacological targets Short title: Comparative transcriptomics of acutely dissected versus cultured DRGs Andi Wangzhou1, Lisa A. McIlvried2, Candler Paige1, Paulino Barragan-Iglesias1, Carolyn A. Guzman1, Gregory Dussor1, Pradipta R. Ray1,#, Robert W. Gereau IV2, # and Theodore J. Price1, # 1The University of Texas at Dallas, School of Behavioral and Brain Sciences and Center for Advanced Pain Studies, 800 W Campbell Rd. Richardson, TX, 75080, USA 2Washington University Pain Center and Department of Anesthesiology, Washington University School of Medicine # corresponding authors [email protected], [email protected] and [email protected] Funding: NIH grants T32DA007261 (LM); NS065926 and NS102161 (TJP); NS106953 and NS042595 (RWG). The authors declare no conflicts of interest Author Contributions Conceived of the Project: PRR, RWG IV and TJP Performed Experiments: AW, LAM, CP, PB-I Supervised Experiments: GD, RWG IV, TJP Analyzed Data: AW, LAM, CP, CAG, PRR Supervised Bioinformatics Analysis: PRR Drew Figures: AW, PRR Wrote and Edited Manuscript: AW, LAM, CP, GD, PRR, RWG IV, TJP All authors approved the final version of the manuscript. 1 bioRxiv preprint doi: https://doi.org/10.1101/766865; this version posted September 12, 2019. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. -
Supplementary Table 1
SI Table S1. Broad protein kinase selectivity for PF-2771. Kinase, PF-2771 % Inhibition at 10 μM Service Kinase, PF-2771 % Inhibition at 1 μM Service rat RPS6KA1 (RSK1) 39 Dundee AURKA (AURA) 24 Invitrogen IKBKB (IKKb) 26 Dundee CDK2 /CyclinA 21 Invitrogen mouse LCK 25 Dundee rabbit MAP2K1 (MEK1) 19 Dundee AKT1 (AKT) 21 Dundee IKBKB (IKKb) 16 Dundee CAMK1 (CaMK1a) 19 Dundee PKN2 (PRK2) 14 Dundee RPS6KA5 (MSK1) 18 Dundee MAPKAPK5 14 Dundee PRKD1 (PKD1) 13 Dundee PIM3 12 Dundee MKNK2 (MNK2) 12 Dundee PRKD1 (PKD1) 12 Dundee MARK3 10 Dundee NTRK1 (TRKA) 12 Invitrogen SRPK1 9 Dundee MAPK12 (p38g) 11 Dundee MAPKAPK5 9 Dundee MAPK8 (JNK1a) 11 Dundee MAPK13 (p38d) 8 Dundee rat PRKAA2 (AMPKa2) 11 Dundee AURKB (AURB) 5 Dundee NEK2 11 Invitrogen CSK 5 Dundee CHEK2 (CHK2) 11 Invitrogen EEF2K (EEF-2 kinase) 4 Dundee MAPK9 (JNK2) 9 Dundee PRKCA (PKCa) 4 Dundee rat RPS6KA1 (RSK1) 8 Dundee rat PRKAA2 (AMPKa2) 4 Dundee DYRK2 7 Dundee rat CSNK1D (CKId) 3 Dundee AKT1 (AKT) 7 Dundee LYN 3 BioPrint PIM2 7 Invitrogen CSNK2A1 (CKIIa) 3 Dundee MAPK15 (ERK7) 6 Dundee CAMKK2 (CAMKKB) 1 Dundee mouse LCK 5 Dundee PIM3 1 Dundee PDPK1 (PDK1) (directed 5 Invitrogen rat DYRK1A (MNB) 1 Dundee RPS6KB1 (p70S6K) 5 Dundee PBK 0 Dundee CSNK2A1 (CKIIa) 4 Dundee PIM1 -1 Dundee CAMKK2 (CAMKKB) 4 Dundee DYRK2 -2 Dundee SRC 4 Invitrogen MAPK12 (p38g) -2 Dundee MYLK2 (MLCK_sk) 3 Invitrogen NEK6 -3 Dundee MKNK2 (MNK2) 2 Dundee RPS6KB1 (p70S6K) -3 Dundee SRPK1 2 Dundee AKT2 -3 Dundee MKNK1 (MNK1) 2 Dundee RPS6KA3 (RSK2) -3 Dundee CHEK1 (CHK1) 2 Invitrogen rabbit MAP2K1 (MEK1) -4 Dundee -
UPSTREAM COMPONENTS of MTORC1 by Li Li a Dissertation
UPSTREAM COMPONENTS OF MTORC1 by Li Li A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy (Biological Chemistry) in The University of Michigan 2011 Doctoral Committee: Professor Kunliang Guan, Chair Professor Randal J. Kaufman Associate Professor Anne B. Vojtek Associate Professor Martin G. Myers Assistant Professor Diane C. Fingar © Li Li 2011 This work is dedicated to my parents. Without their support and guidance, I would not be where I am today. I also dedicate this work to my husband, for pushing me to the best I can. Last, and most importantly, I would like to dedicate this work to my fifteen months son for being well behaved during the last few months. You are the treasure of my life. ii ACKNOWLEDGEMENTS I would like to express my deep gratitude to my mentor Dr. Kun-Liang Guan for his direction, encouragement, and support during my graduate study. I am very thankful to him for his patience with me, enduring my naïve questions. That Dr. Guan is so approachable and enthusiastic about science set me an example on how to be a great PI and a great scientist. Next, I sincerely acknowledge the members of my thesis committee, Drs Randal J. Kaufman, Anne B. Vojtek, Diane C. Fingar and Martin G. Myers for their insightful suggestions and constructive criticism on my work. I would like to thank the current and former members of the Guan lab. All of them made the lab a great place to work. Especially, I would like to thank Bin Zhao, my husband, also a Guan lab member, for teaching me every lab techniques. -
Supplementary Table 1. in Vitro Side Effect Profiling Study for LDN/OSU-0212320. Neurotransmitter Related Steroids
Supplementary Table 1. In vitro side effect profiling study for LDN/OSU-0212320. Percent Inhibition Receptor 10 µM Neurotransmitter Related Adenosine, Non-selective 7.29% Adrenergic, Alpha 1, Non-selective 24.98% Adrenergic, Alpha 2, Non-selective 27.18% Adrenergic, Beta, Non-selective -20.94% Dopamine Transporter 8.69% Dopamine, D1 (h) 8.48% Dopamine, D2s (h) 4.06% GABA A, Agonist Site -16.15% GABA A, BDZ, alpha 1 site 12.73% GABA-B 13.60% Glutamate, AMPA Site (Ionotropic) 12.06% Glutamate, Kainate Site (Ionotropic) -1.03% Glutamate, NMDA Agonist Site (Ionotropic) 0.12% Glutamate, NMDA, Glycine (Stry-insens Site) 9.84% (Ionotropic) Glycine, Strychnine-sensitive 0.99% Histamine, H1 -5.54% Histamine, H2 16.54% Histamine, H3 4.80% Melatonin, Non-selective -5.54% Muscarinic, M1 (hr) -1.88% Muscarinic, M2 (h) 0.82% Muscarinic, Non-selective, Central 29.04% Muscarinic, Non-selective, Peripheral 0.29% Nicotinic, Neuronal (-BnTx insensitive) 7.85% Norepinephrine Transporter 2.87% Opioid, Non-selective -0.09% Opioid, Orphanin, ORL1 (h) 11.55% Serotonin Transporter -3.02% Serotonin, Non-selective 26.33% Sigma, Non-Selective 10.19% Steroids Estrogen 11.16% 1 Percent Inhibition Receptor 10 µM Testosterone (cytosolic) (h) 12.50% Ion Channels Calcium Channel, Type L (Dihydropyridine Site) 43.18% Calcium Channel, Type N 4.15% Potassium Channel, ATP-Sensitive -4.05% Potassium Channel, Ca2+ Act., VI 17.80% Potassium Channel, I(Kr) (hERG) (h) -6.44% Sodium, Site 2 -0.39% Second Messengers Nitric Oxide, NOS (Neuronal-Binding) -17.09% Prostaglandins Leukotriene, -
Analysis of 3-Phosphoinositide-Dependent Kinase-1 Signaling and Function in ES Cells
EXPERIMENTAL CELL RESEARCH 314 (2008) 2299– 2312 available at www.sciencedirect.com www.elsevier.com/locate/yexcr Research Article Analysis of 3-phosphoinositide-dependent kinase-1 signaling and function in ES cells Tanja Tamgüneya,b, Chao Zhangc, Dorothea Fiedlerc, Kevan Shokatc, David Stokoea,⁎ aUCSF Cancer Research Institute, USA bMolecular Medicine Program, Friedrich-Alexander University of Erlangen-Nuremberg, Erlangen, Germany cDepartment of Cellular and Molecular Pharmacology, University of California, San Francisco, 2340 Sutter Street, San Francisco, CA 94115, USA ARTICLE INFORMATION ABSTRACT Article Chronology: 3-Phosphoinositide-dependent kinase-1 (PDK1) phosphorylates and activates several Received 5 February 2008 kinases in the cAMP-dependent, cGMP-dependent and protein kinase C (AGC) family. Revised version received Many putative PDK1 substrates have been identified, but have not been analyzed following 15 April 2008 transient and specific inhibition of PDK1 activity. Here, we demonstrate that a previously Accepted 16 April 2008 characterized PDK1 inhibitor, BX-795, shows biological effects that are not consistent with Available online 23 April 2008 PDK1 inhibition. Therefore, we describe the creation and characterization of a PDK1 mutant, L159G, which can bind inhibitor analogues containing bulky groups that hinder access to the − − Keywords: ATP binding pocket of wild type (WT) kinases. When expressed in PDK1 / ES cells, PDK1 PDK1 L159G restored phosphorylation of PDK1 targets known to be hypophosphorylated in these PKB/Akt cells. Screening of multiple inhibitor analogues showed that 1-NM-PP1 and 3,4-DMB-PP1 − − PI3K optimally inhibited the phosphorylation of PDK1 targets in PDK1 / ES cells expressing PDK1 Chemical genetics L159G but not WT PDK1. These compounds confirmed previously assumed PDK1 substrates, AGC kinases but revealed distinct dephosphorylation kinetics. -
Activation of Diverse Signalling Pathways by Oncogenic PIK3CA Mutations
ARTICLE Received 14 Feb 2014 | Accepted 12 Aug 2014 | Published 23 Sep 2014 DOI: 10.1038/ncomms5961 Activation of diverse signalling pathways by oncogenic PIK3CA mutations Xinyan Wu1, Santosh Renuse2,3, Nandini A. Sahasrabuddhe2,4, Muhammad Saddiq Zahari1, Raghothama Chaerkady1, Min-Sik Kim1, Raja S. Nirujogi2, Morassa Mohseni1, Praveen Kumar2,4, Rajesh Raju2, Jun Zhong1, Jian Yang5, Johnathan Neiswinger6, Jun-Seop Jeong6, Robert Newman6, Maureen A. Powers7, Babu Lal Somani2, Edward Gabrielson8, Saraswati Sukumar9, Vered Stearns9, Jiang Qian10, Heng Zhu6, Bert Vogelstein5, Ben Ho Park9 & Akhilesh Pandey1,8,9 The PIK3CA gene is frequently mutated in human cancers. Here we carry out a SILAC-based quantitative phosphoproteomic analysis using isogenic knockin cell lines containing ‘driver’ oncogenic mutations of PIK3CA to dissect the signalling mechanisms responsible for oncogenic phenotypes induced by mutant PIK3CA. From 8,075 unique phosphopeptides identified, we observe that aberrant activation of PI3K pathway leads to increased phosphorylation of a surprisingly wide variety of kinases and downstream signalling networks. Here, by integrating phosphoproteomic data with human protein microarray-based AKT1 kinase assays, we discover and validate six novel AKT1 substrates, including cortactin. Through mutagenesis studies, we demonstrate that phosphorylation of cortactin by AKT1 is important for mutant PI3K-enhanced cell migration and invasion. Our study describes a quantitative and global approach for identifying mutation-specific signalling events and for discovering novel signalling molecules as readouts of pathway activation or potential therapeutic targets. 1 McKusick-Nathans Institute of Genetic Medicine and Department of Biological Chemistry, Johns Hopkins University School of Medicine, 733 North Broadway, BRB 527, Baltimore, Maryland 21205, USA. -
Characterization of a Protein Kinase B Inhibitor in Vitro and in Insulin-Treated Liver Cells Lisa Logie,1 Antonio J
Original Article Characterization of a Protein Kinase B Inhibitor In Vitro and in Insulin-Treated Liver Cells Lisa Logie,1 Antonio J. Ruiz-Alcaraz,1 Michael Keane,2,3 Yvonne L. Woods,2 Jennifer Bain,2 Rudolfo Marquez,3 Dario R. Alessi,1 and Calum Sutherland1 OBJECTIVE—Abnormal expression of the hepatic gluconeo- genic genes (glucose-6-phosphatase [G6Pase] and PEPCK) con- tributes to hyperglycemia. These genes are repressed by insulin, rotein kinase B (PKB) is a member of the AGC but this process is defective in diabetic subjects. Protein kinase family of protein kinases (1–3). In mammals, B (PKB) is implicated in this action of insulin. An inhibitor of there are three isoforms (PKB␣, PKB, and PKB, Akt inhibitor (Akti)-1/2, was recently reported; however, PPKB␥) (1). PKB is activated following induction the specificity and efficacy against insulin-induced PKB was not of phosphatidylinositol 3 (PI3) kinase activity and the reported. Our aim was to characterize the specificity and efficacy resultant generation of the lipid second messengers PI of Akti-1/2 in cells exposed to insulin and then establish whether 3,4,5 trisphosphate and PI 3,4 bisphosphate (4). These inhibition of PKB is sufficient to prevent regulation of hepatic lipids bind to the PH domain of PKB, altering its confor- gene expression by insulin. mation and permitting access to upstream protein kinases RESEARCH DESIGN AND METHODS—Akti-1/2 was assayed (5). Phosphoinositide-dependent protein kinase-1 phos- against 70 kinases in vitro and its ability to block PKB activation phorylates PKB at Thr308 (6), and a second phosphoryla- in cells exposed to insulin fully characterized. -
Supplemental Tables
Supplemental Tables 1 (Up in 1 (Up in Log2 AD80) / 2 Log2 1 (Up in Log2 AD80) / 2 Fold (Low in Fold AD80) / 2 Fold Gene (Low in AD30) change Gene AD30) change Gene (Low in AD30) change G6PC 1 8.262795 SYT8 1 3.826244 SPATA9 1 3.10268 ADH1B 1 7.508264 ADH4 1 3.800391 SPTSSB 1 3.093815 RNU1-70P 1 6.596403 WNT8B 1 3.799741 CYP26A1 1 3.093672 CYP7A1 1 6.56167 TNFSF10 1 3.795007 ACR 1 3.092358 ADH1A 1 6.358759 HMGCS2 1 3.791218 DUOX2 1 3.090622 SLC2A2 1 6.05681 GNAT1 1 3.737262 SPTLC3 1 3.086353 TNFRSF14- AS1 1 6.055208 CFHR4 1 3.732386 FER1L5 1 3.081569 IGFALS 1 5.825777 BSND 1 3.718276 RASA4CP 1 3.080765 LINC00957 1 5.727226 TSPOAP1 1 3.709555 DOC2GP 1 3.057021 TTBK1 1 5.724558 SLC22A7 1 3.698323 VAT1L 1 3.051293 CYP3A43 1 5.674953 AOC4P 1 3.68655 FMO3 1 3.031314 HNF4A- UGT1A9 1 5.643359 AS1 1 3.679788 SFRP5 1 3.016623 APOL3 1 5.448612 FHAD1 1 3.665007 RFX6 1 3.015833 - VCAM1 1 5.442271 ADAMTS10 1 3.61034 SLC5A8 2 3.015901 BFSP2 1 5.396028 NUDT13 1 3.562774 LFNG 2 -3.01667 C22orf31 1 5.349548 FYTTD1P1 1 3.544783 CXCR4 2 -3.0544 FOXN1 1 5.19046 CHAD 1 3.534052 GPR3 2 -3.099 - A2MP1 1 5.186347 IRF5 1 3.517716 PA2G4P6 2 3.103813 - UROC1 1 5.056845 GSTA7P 1 3.504839 PRDM8 2 3.140796 - XAF1 1 5.053767 CXCL10 1 3.486513 DGKG 2 3.261431 - ADAMTS14 1 5.049252 SERPINA2 1 3.481204 BCAN 2 3.389266 - UGT1A8 1 5.048674 WDR93 1 3.475799 MMP10 2 3.411248 - TTLL11-IT1 1 4.965854 MAP6 1 3.465613 MYBPC3 2 3.492397 HRC 1 4.853162 MOV10L1 1 3.457172 MUC12 2 -3.55192 - MOGAT2 1 4.797347 HP 1 3.456436 FGF18 2 3.551928 - SEPT7P9 1 4.735573 MT1B 1 3.43852 MYO1G -
Inhibition of ERK 1/2 Kinases Prevents Tendon Matrix Breakdown Ulrich Blache1,2,3, Stefania L
www.nature.com/scientificreports OPEN Inhibition of ERK 1/2 kinases prevents tendon matrix breakdown Ulrich Blache1,2,3, Stefania L. Wunderli1,2,3, Amro A. Hussien1,2, Tino Stauber1,2, Gabriel Flückiger1,2, Maja Bollhalder1,2, Barbara Niederöst1,2, Sandro F. Fucentese1 & Jess G. Snedeker1,2* Tendon extracellular matrix (ECM) mechanical unloading results in tissue degradation and breakdown, with niche-dependent cellular stress directing proteolytic degradation of tendon. Here, we show that the extracellular-signal regulated kinase (ERK) pathway is central in tendon degradation of load-deprived tissue explants. We show that ERK 1/2 are highly phosphorylated in mechanically unloaded tendon fascicles in a vascular niche-dependent manner. Pharmacological inhibition of ERK 1/2 abolishes the induction of ECM catabolic gene expression (MMPs) and fully prevents loss of mechanical properties. Moreover, ERK 1/2 inhibition in unloaded tendon fascicles suppresses features of pathological tissue remodeling such as collagen type 3 matrix switch and the induction of the pro-fbrotic cytokine interleukin 11. This work demonstrates ERK signaling as a central checkpoint to trigger tendon matrix degradation and remodeling using load-deprived tissue explants. Tendon is a musculoskeletal tissue that transmits muscle force to bone. To accomplish its biomechanical function, tendon tissues adopt a specialized extracellular matrix (ECM) structure1. Te load-bearing tendon compart- ment consists of highly aligned collagen-rich fascicles that are interspersed with tendon stromal cells. Tendon is a mechanosensitive tissue whereby physiological mechanical loading is vital for maintaining tendon archi- tecture and homeostasis2. Mechanical unloading of the tissue, for instance following tendon rupture or more localized micro trauma, leads to proteolytic breakdown of the tissue with severe deterioration of both structural and mechanical properties3–5. -
Supporting Information Supporting Information Corrected July 15 , 2014 Yi Et Al
Supporting Information Supporting Information Corrected July 15 , 2014 Yi et al. 10.1073/pnas.1404943111 SI Materials and Methods which no charge state could be determined were excluded MS/ Tumorsphere Growth Assay. Single-cell tumorsphere growth assays MS selection). Three independent experiments were performed. of human mammary epithelial (HMLER) (CD44high/CD24low)SA and HMLER (CD44high/CD24low)FA population cells were per- Phosphorylation Site Localization. The probability of correct phos- formed with ultra-low attachment surface six-well plates (Corn- phorylation site localization for each phosphorylation site was ing) and the mammary epithelial cell basal medium (MEBM) measured using an Ascore algorithm (1). This algorithm con- medium (Lonza) was supplemented with B27 (Invitrogen), 20 ng/mL siders all phosphoforms of a peptide and uses the presence or EGF, and 20 ng/mL basic FGF (BD Biosciences), and 4 μg/mL absence of experimental fragment ions unique to each to create an ambiguity score (Ascore). Parameters included a window size of heparin (Sigma). Single cells were cultured for 8 d and images were ± taken with a Nikon camera. 100 m/z units and a fragment ion tolerance of 0.6 m/z units. Sites with an Ascore of ≥13 (P ≤ 0.05) were considered to be ≥ ≤ Soft Agar Colony Growth Assay. Single-cell soft agar colony for- confidently localized, and those with an Ascore of 19 (P 0.01) mation and growth assays were performed to identify the tumor- were considered to be localized with near certainty. More than ≥ igenesis capacity of HMLER (CD44high/CD24low)SA and HMLER a 2.5-fold ratio ( 60.02%) was considered as a significant (CD44high/CD24low)FA population cells in vitro. -
PRODUCTS and SERVICES Target List
PRODUCTS AND SERVICES Target list Kinase Products P.1-11 Kinase Products Biochemical Assays P.12 "QuickScout Screening Assist™ Kits" Kinase Protein Assay Kits P.13 "QuickScout Custom Profiling & Panel Profiling Series" Targets P.14 "QuickScout Custom Profiling Series" Preincubation Targets Cell-Based Assays P.15 NanoBRET™ TE Intracellular Kinase Cell-Based Assay Service Targets P.16 Tyrosine Kinase Ba/F3 Cell-Based Assay Service Targets P.17 Kinase HEK293 Cell-Based Assay Service ~ClariCELL™ ~ Targets P.18 Detection of Protein-Protein Interactions ~ProbeX™~ Stable Cell Lines Crystallization Services P.19 FastLane™ Structures ~Premium~ P.20-21 FastLane™ Structures ~Standard~ Kinase Products For details of products, please see "PRODUCTS AND SERVICES" on page 1~3. Tyrosine Kinases Note: Please contact us for availability or further information. Information may be changed without notice. Expression Protein Kinase Tag Carna Product Name Catalog No. Construct Sequence Accession Number Tag Location System HIS ABL(ABL1) 08-001 Full-length 2-1130 NP_005148.2 N-terminal His Insect (sf21) ABL(ABL1) BTN BTN-ABL(ABL1) 08-401-20N Full-length 2-1130 NP_005148.2 N-terminal DYKDDDDK Insect (sf21) ABL(ABL1) [E255K] HIS ABL(ABL1)[E255K] 08-094 Full-length 2-1130 NP_005148.2 N-terminal His Insect (sf21) HIS ABL(ABL1)[T315I] 08-093 Full-length 2-1130 NP_005148.2 N-terminal His Insect (sf21) ABL(ABL1) [T315I] BTN BTN-ABL(ABL1)[T315I] 08-493-20N Full-length 2-1130 NP_005148.2 N-terminal DYKDDDDK Insect (sf21) ACK(TNK2) GST ACK(TNK2) 08-196 Catalytic domain -
Regulation of the Polarity Kinases PAR-1/MARK by 14-3-3 Interaction and Phosphorylation
Research Article 4059 Regulation of the polarity kinases PAR-1/MARK by 14-3-3 interaction and phosphorylation Olga Göransson1,*,‡, Maria Deak1, Stephan Wullschleger1, Nick A. Morrice1, Alan R. Prescott2 and Dario R. Alessi1 1University of Dundee, MRC Protein Phosphorylation Unit, James Black Centre and 2University of Dundee, Division of Cell Biology and Immunology, MSI/WTB complex, Dow Street, Dundee, DD1 5EH, Scotland, UK *Present address: Lund University, BMC, C11, S-22184 Lund, Sweden ‡Author for correspondence (e-mail: [email protected]) Accepted 12 June 2006 Journal of Cell Science 119, 4059-4070 Published by The Company of Biologists 2006 doi:10.1242/jcs.03097 Summary Members of the PAR-1/MARK kinase family play critical membrane. We provide data indicating that the membrane roles in polarity and cell cycle control and are regulated by localisation of MARK3 required a highly conserved C- 14-3-3 scaffolding proteins, as well as the LKB1 tumour terminal domain, which has been termed kinase-associated suppressor kinase and atypical protein kinase C (PKC). domain-1 (KA-1). We also show that dissociation of 14-3-3 In this study, we initially investigated the mechanism from MARK3 did not affect catalytic activity, and that a underlying the interaction of mammalian MARK3 with MARK3 mutant, which could not interact with 14-3-3, was 14-3-3. We demonstrate that 14-3-3 binding to MARK3 normally active. Finally, we establish that there are is dependent on phosphorylation, and necessitates the significant differences in the subcellular localisation of phosphate-binding pocket of 14-3-3.