1
|
Jun YW, Lee JA, Kaang BK, Jang DJ. PI4KII activity-dependent Golgi complex targeting of Aplysia phosphodiesterase 4 long-form mutant. Anim Cells Syst (Seoul) 2017. [DOI: 10.1080/19768354.2017.1371073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Affiliation(s)
- Yong-Woo Jun
- Department of Ecological Science, College of Ecology and Environment, Kyungpook National University, Sangju-si, Republic of Korea
| | - Jin-A Lee
- Department of Biotechnology and Biological Science, College of Life Science and Nanotechnology, Hannam University, Daejeon, Republic of Korea
| | - Bong-Kiun Kaang
- Department of Biological Sciences, College of Natural Sciences, Seoul National University, Seoul, Republic of Korea
| | - Deok-Jin Jang
- Department of Ecological Science, College of Ecology and Environment, Kyungpook National University, Sangju-si, Republic of Korea
| |
Collapse
|
2
|
Um SM, Jun YW, Kim KH, Lee JA, Jang DJ. Analysis of molecular mechanism of cellular localization of various N-terminal mutants of Aplysia PDE4 in HEK293T cells. ANALYTICAL SCIENCE AND TECHNOLOGY 2016. [DOI: 10.5806/ast.2016.29.1.10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
3
|
Jang DJ, Kim HF, Sim JH, Lim CS, Kaang BK. Specific Expression of Aplysia Phosphodiesterase 4 in Bag Cells Revealed by in situ Hybridization Analysis. Exp Neurobiol 2015; 24:246-51. [PMID: 26412974 PMCID: PMC4580752 DOI: 10.5607/en.2015.24.3.246] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Revised: 07/20/2015] [Accepted: 07/31/2015] [Indexed: 11/19/2022] Open
Abstract
Phosphodiesterases (PDEs) play a key role in the regulation of cyclic adenosine monophosphate (cAMP), which in turn mediates various cellular functions including learning and memory. We previously cloned and characterized three PDE4 isoforms (ApPDE4) from Aplysia kurodai. Using reverse transcription polymerase chain reaction (RT-PCR), we found that ApPDE4 isoforms are primarily expressed in the central nervous system. However, the detailed distribution of ApPDE4 mRNA in Aplysia individual ganglions was not evident. In this study, to determine the distribution of ApPDE4 mRNAs in Aplysia ganglions, we performed in situ hybridization (ISH) using a probe targeting ApPDE4, including the PDE catalytic domain. Interestingly, we found the strongest ISH-positive signals in the symmetrical bag cell clusters of the abdominal ganglion. The R2, R14, L7, L2 and L11 neurons in the abdominal ganglion, LP1 neuron in pleural ganglion, and metacerebral (MCC) neurons were ISH-positive. Mechanosensory neurons of the sensory cluster were also stained on the ventral aspect of the right and left pleural ganglia. Taken together, we found the detailed distribution of ApPDE4 mRNA in Aplysia ganglion and support their roles in serotonin (5-HT)-induced synaptic facilitation of Aplysia mechanosensory neurons.
Collapse
Affiliation(s)
- Deok-Jin Jang
- Department of Ecological Science, College of Ecology and Environment, Kyungpook National University, Sangju 37224, Korea
| | - Hyoung F Kim
- Department of Biological Sciences, College of Natural Sciences, Seoul National University, Seoul 08826, Korea
| | - Jae-Hoon Sim
- Department of Biological Sciences, College of Natural Sciences, Seoul National University, Seoul 08826, Korea
| | - Chae-Seok Lim
- Department of Biological Sciences, College of Natural Sciences, Seoul National University, Seoul 08826, Korea
| | - Bong-Kiun Kaang
- Department of Biological Sciences, College of Natural Sciences, Seoul National University, Seoul 08826, Korea
| |
Collapse
|
4
|
Kim KH, Jun YW, Park Y, Lee JA, Suh BC, Lim CS, Lee YS, Kaang BK, Jang DJ. Intracellular membrane association of the Aplysia cAMP phosphodiesterase long and short forms via different targeting mechanisms. J Biol Chem 2014; 289:25797-811. [PMID: 25077971 DOI: 10.1074/jbc.m114.572222] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Phosphodiesterases (PDEs) play key roles in cAMP compartmentalization, which is required for intracellular signaling processes, through specific subcellular targeting. Previously, we showed that the long and short forms of Aplysia PDE4 (ApPDE4), which are localized to the membranes of distinct subcellular organelles, play key roles in 5-hydroxytryptamine-induced synaptic facilitation in Aplysia sensory and motor synapses. However, the molecular mechanism of the isoform-specific distinct membrane targeting was not clear. In this study, we further investigated the molecular mechanism of the membrane targeting of the ApPDE4 long and short forms. We found that the membrane targeting of the long form was mediated by hydrophobic interactions, mainly via 16 amino acids at the N-terminal region, whereas the short form was targeted solely to the plasma membrane, mainly by nonspecific electrostatic interactions between their N termini and the negatively charged lipids such as the phosphatidylinositol polyphosphates PI4P and PI(4,5)P2, which are embedded in the inner leaflet of the plasma membrane. Moreover, oligomerization of the long or short form by interaction of their respective upstream conserved region domains, UCR1 and UCR2, enhanced their plasma membrane targeting. These results suggest that the long and short forms of ApPDE4 are distinctly targeted to intracellular membranes through their direct association with the membranes via hydrophobic and electrostatic interactions, respectively.
Collapse
Affiliation(s)
- Kun-Hyung Kim
- From the Department of Ecological Science, College of Ecology and Environment, Kyungpook National University, 386, Gajang-dong, Sangju-si, Kyungbuk 742-711, Korea
| | - Yong-Woo Jun
- From the Department of Ecological Science, College of Ecology and Environment, Kyungpook National University, 386, Gajang-dong, Sangju-si, Kyungbuk 742-711, Korea
| | - Yongsoo Park
- the Department of Neurobiology, Max-Planck-Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Göttingen, Germany
| | - Jin-A Lee
- the Department of Biotechnology, College of Life Science and Nanotechnology, Hannam University, 461-6, Jeonmin-dong, Yuseong-gu, Daejeon 305-811, Korea
| | - Byung-Chang Suh
- the Department of Brain Science, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 711-873, Korea
| | - Chae-Seok Lim
- the Department of Biological Sciences, College of Natural Sciences, Seoul National University, 599 Gwanangno, Gwanak-gu, Seoul 151-747, Korea, and
| | - Yong-Seok Lee
- the Department of Life Science, College of Natural Science, Chung-Ang University, Seoul 156-756, Korea
| | - Bong-Kiun Kaang
- the Department of Biological Sciences, College of Natural Sciences, Seoul National University, 599 Gwanangno, Gwanak-gu, Seoul 151-747, Korea, and
| | - Deok-Jin Jang
- From the Department of Ecological Science, College of Ecology and Environment, Kyungpook National University, 386, Gajang-dong, Sangju-si, Kyungbuk 742-711, Korea,
| |
Collapse
|
5
|
Kim KH, Jun YW, Lee JA, Jang DJ. Identification of N-terminal amino acids of ApPDE4 involved in targeting to plasma membrane and cellular morphological change by expression of N-terminal peptide. ANALYTICAL SCIENCE AND TECHNOLOGY 2013. [DOI: 10.5806/ast.2013.26.1.106] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
6
|
Learning-related synaptic growth mediated by internalization of Aplysia cell adhesion molecule is controlled by membrane phosphatidylinositol 4,5-bisphosphate synthetic pathway. J Neurosci 2013; 32:16296-305. [PMID: 23152613 DOI: 10.1523/jneurosci.1872-12.2012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Long-term facilitation in Aplysia is accompanied by the growth of new synaptic connections between the sensory and motor neurons of the gill-withdrawal reflex. One of the initial steps leading to the growth of these synapses is the internalization, induced by 5-HT, of the transmembrane isoform of Aplysia cell-adhesion molecule (TM-apCAM) from the plasma membrane of sensory neurons (Bailey et al., 1992). However, the mechanisms that govern the internalization of TM-apCAM and how this internalization is coupled to the molecular events that initiate the structural changes are not fully understood. Here, we report that the synthesis of membrane phosphatidylinositol 4,5-bisphosphate [PI(4,5)P(2)], which is known to be mediated by a signaling cascade through Aplysia Sec7 protein (ApSec7) and phosphatidylinositol-4-phosphate 5-kinase type I α (PIP5KIα) is required for both the internalization of TM-apCAM and the initiation of synaptic growth during 5-HT-induced long-term facilitation. Pharmacological blockade of PI(4,5)P(2) synthesis by the application of the inhibitor phenylarsine oxide blocked the internalization of apCAM. Furthermore, perturbation of the endogenous activation of ApSec7 and its downstream target PIP5KIα also blocked 5-HT-mediated internalization of TM-apCAM and synaptic growth. Finally, long-term facilitation was specifically impaired by blocking the ApSec7 signaling pathway at sensory-to-motor neuron synapses. These data indicate that the ApSec7/PIP5KIα signaling pathway is actively recruited during learning-related 5-HT signaling and acts as a key regulator of apCAM internalization associated with the formation of new synaptic connections during long-term facilitation.
Collapse
|
7
|
Dunn TW, Farah CA, Sossin WS. Inhibitory responses in Aplysia pleural sensory neurons act to block excitability, transmitter release, and PKC Apl II activation. J Neurophysiol 2011; 107:292-305. [PMID: 21994260 DOI: 10.1152/jn.00767.2011] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Expression of the 5-HT(1Apl(a)) receptor in Aplysia pleural sensory neurons inhibited 5-HT-mediated translocation of the novel PKC Apl II in sensory neurons and prevented PKC-dependent synaptic facilitation at sensory to motoneuron synapses (Nagakura et al. 2010). We now demonstrate that the ability of inhibitory receptors to block PKC activation is a general feature of inhibitory receptors and is found after expression of the 5-HT(1Apl(b)) receptor and with activation of endogenous dopamine and FMRFamide receptors in sensory neurons. Pleural sensory neurons are heterogeneous for their inhibitory response to endogenous transmitters, with dopamine being the most prevalent, followed by FMRFamide, and only a small number of neurons with inhibitory responses to 5-HT. The inhibitory response is dominant, reduces membrane excitability and synaptic efficacy, and can reverse 5-HT facilitation at both naive and depressed synapses. Indeed, dopamine can reverse PKC translocation during the continued application of 5-HT. Reversal of translocation can also be seen after translocation mediated by an analog of diacylglycerol, suggesting inhibition is not through blockade of diacylglycerol production. The effects of inhibition on PKC translocation can be rescued by phosphatidic acid, consistent with the inhibitory response involving a reduction or block of production of this lipid. However, phosphatidic acid could not recover PKC-dependent synaptic facilitation due to an additional inhibitory effect on the non-L-type calcium flux linked to synaptic transmission. In summary, we find a novel mechanism downstream of inhibitory receptors linked to inhibition of PKC activation in Aplysia sensory neurons.
Collapse
Affiliation(s)
- Tyler W Dunn
- Dept. of Neurology and Neurosurgery, McGill Univ., Montreal Neurological Institute, BT 110, 3801 Univ. St., Montreal, Quebec H3A 2B4, Canada.
| | | | | |
Collapse
|