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Carter T, Iqbal M. The Influenza A Virus Replication Cycle: A Comprehensive Review. Viruses 2024; 16:316. [PMID: 38400091 PMCID: PMC10892522 DOI: 10.3390/v16020316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 02/15/2024] [Accepted: 02/17/2024] [Indexed: 02/25/2024] Open
Abstract
Influenza A virus (IAV) is the primary causative agent of influenza, colloquially called the flu. Each year, it infects up to a billion people, resulting in hundreds of thousands of human deaths, and causes devastating avian outbreaks with worldwide losses worth billions of dollars. Always present is the possibility that a highly pathogenic novel subtype capable of direct human-to-human transmission will spill over into humans, causing a pandemic as devastating if not more so than the 1918 influenza pandemic. While antiviral drugs for influenza do exist, they target very few aspects of IAV replication and risk becoming obsolete due to antiviral resistance. Antivirals targeting other areas of IAV replication are needed to overcome this resistance and combat the yearly epidemics, which exact a serious toll worldwide. This review aims to summarise the key steps in the IAV replication cycle, along with highlighting areas of research that need more focus.
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Affiliation(s)
- Toby Carter
- The Pirbright Institute, Ash Road, Pirbright, Woking GU24 0NF, UK;
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2
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Li X, Liu B, Wen Y, Wang J, Guo YR, Shi A, Lin L. Coordination of RAB-8 and RAB-11 during unconventional protein secretion. J Cell Biol 2024; 223:e202306107. [PMID: 38019180 PMCID: PMC10686230 DOI: 10.1083/jcb.202306107] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 10/17/2023] [Accepted: 11/16/2023] [Indexed: 11/30/2023] Open
Abstract
Multiple physiology-pertinent transmembrane proteins reach the cell surface via the Golgi-bypassing unconventional protein secretion (UcPS) pathway. By employing C. elegans-polarized intestine epithelia, we recently have revealed that the small GTPase RAB-8/Rab8 serves as an important player in the process. Nonetheless, its function and the relevant UcPS itinerary remain poorly understood. Here, we show that deregulated RAB-8 activity resulted in impaired apical UcPS, which increased sensitivity to infection and environmental stress. We also identified the SNARE VTI-1/Vti1a/b as a new RAB-8-interacting factor involved in the apical UcPS. Besides, RAB-11/Rab11 was capable of recruiting RABI-8/Rabin8 to reduce the guanine nucleotide exchange activity of SMGL-1/GEF toward RAB-8, indicating the necessity of a finely tuned RAB-8/RAB-11 network. Populations of RAB-8- and RAB-11-positive endosomal structures containing the apical UcPS cargo moved toward the apical side. In the absence of RAB-11 or its effectors, the cargo was retained in RAB-8- and RAB-11-positive endosomes, respectively, suggesting that these endosomes are utilized as intermediate carriers for the UcPS.
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Affiliation(s)
- Xinxin Li
- Department of Biochemistry and Molecular Biology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Bowen Liu
- Department of Biochemistry and Molecular Biology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yue Wen
- Department of Biochemistry and Molecular Biology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jiabin Wang
- Department of Biochemistry and Molecular Biology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yusong R. Guo
- Department of Biochemistry and Molecular Biology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Anbing Shi
- Department of Biochemistry and Molecular Biology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Long Lin
- Department of Biochemistry and Molecular Biology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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3
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Guo RJ, Cao YF, Li EM, Xu LY. Multiple functions and dual characteristics of RAB11A in cancers. Biochim Biophys Acta Rev Cancer 2023; 1878:188966. [PMID: 37657681 DOI: 10.1016/j.bbcan.2023.188966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 08/05/2023] [Accepted: 08/05/2023] [Indexed: 09/03/2023]
Abstract
Vesicle trafficking is an unceasing and elaborate cellular process that functions in material transport and information delivery. Recent studies have identified the small GTPase, Ras-related protein in brain 11A (RAB11A), as a key regulator in this process. Aberrant RAB11A expression has been reported in several types of cancers, suggesting the important functions and characteristics of RAB11A in cancer. These discoveries are of great significance because therapeutic strategies based on the physiological and pathological status of RAB11A might make cancer treatment more effective, as the molecular mechanisms of cancer development have not been completely revealed. However, these studies on RAB11A have not been reviewed and discussed specifically. Therefore, we summarize and discuss the recent findings of RAB11A involvement in different biological processes, including endocytic recycling regulation, receptors and adhesion molecules recycling, exosome secretion, phagophore formation and cytokinesis, as well as regulatory mechanisms in several tumor types. Moreover, contradictory effects of RAB11A have also been observed in different types of cancers, implying the dual characteristics of RAB11A in cancer, which are either oncogenic or tumor-suppressive. This review on the functions and characteristics of RAB11A highlights the value of RAB11A in inducing multiple important phenotypes based on vesicle trafficking and therefore will offer insights for future studies to reveal the molecular mechanisms, clinical significance, and therapeutic targeting of RAB11A in different cancers.
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Affiliation(s)
- Rui-Jian Guo
- The Key Laboratory of Molecular Biology for High Cancer Incidence Coastal Chaoshan Area, Department of Biochemistry and Molecular Biology, Shantou University Medical College, Shantou 515041, Guangdong, PR China
| | - Yu-Fei Cao
- The Key Laboratory of Molecular Biology for High Cancer Incidence Coastal Chaoshan Area, Department of Biochemistry and Molecular Biology, Shantou University Medical College, Shantou 515041, Guangdong, PR China
| | - En-Min Li
- The Key Laboratory of Molecular Biology for High Cancer Incidence Coastal Chaoshan Area, Department of Biochemistry and Molecular Biology, Shantou University Medical College, Shantou 515041, Guangdong, PR China.
| | - Li-Yan Xu
- The Key Laboratory of Molecular Biology for High Cancer Incidence Coastal Chaoshan Area, Department of Biochemistry and Molecular Biology, Shantou University Medical College, Shantou 515041, Guangdong, PR China; Institute of Oncologic Pathology, Shantou University Medical College, Shantou 515041, Guangdong, PR China.
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Hernandez-Perez I, Rubio J, Baumann A, Girao H, Ferrando M, Rebollo E, Aragay AM, Geli MI. Kazrin promotes dynein/dynactin-dependent traffic from early to recycling endosomes. eLife 2023; 12:e83793. [PMID: 37096882 PMCID: PMC10181827 DOI: 10.7554/elife.83793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Accepted: 04/24/2023] [Indexed: 04/26/2023] Open
Abstract
Kazrin is a protein widely expressed in vertebrates whose depletion causes a myriad of developmental defects, in part derived from altered cell adhesion and migration, as well as failure to undergo epidermal to mesenchymal transition. However, the primary molecular role of kazrin, which might contribute to all these functions, has not been elucidated yet. We previously identified one of its isoforms, kazrin C, as a protein that potently inhibits clathrin-mediated endocytosis when overexpressed. We now generated kazrin knock-out mouse embryonic fibroblasts to investigate its endocytic function. We found that kazrin depletion delays juxtanuclear enrichment of internalized material, indicating a role in endocytic traffic from early to recycling endosomes. Consistently, we found that the C-terminal domain of kazrin C, predicted to be an intrinsically disordered region, directly interacts with several early endosome (EE) components, and that kazrin depletion impairs retrograde motility of these organelles. Further, we noticed that the N-terminus of kazrin C shares homology with dynein/dynactin adaptors and that it directly interacts with the dynactin complex and the dynein light intermediate chain 1. Altogether, the data indicate that one of the primary kazrin functions is to facilitate endocytic recycling by promoting dynein/dynactin-dependent transport of EEs or EE-derived transport intermediates to the recycling endosomes.
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Affiliation(s)
- Ines Hernandez-Perez
- Institute for Molecular Biology of Barcelona (IBMB, CSIC), Baldiri Reixac 15BarcelonaSpain
| | - Javier Rubio
- Institute for Molecular Biology of Barcelona (IBMB, CSIC), Baldiri Reixac 15BarcelonaSpain
| | - Adrian Baumann
- Institute for Molecular Biology of Barcelona (IBMB, CSIC), Baldiri Reixac 15BarcelonaSpain
| | - Henrique Girao
- Institute for Molecular Biology of Barcelona (IBMB, CSIC), Baldiri Reixac 15BarcelonaSpain
| | - Miriam Ferrando
- Institute for Molecular Biology of Barcelona (IBMB, CSIC), Baldiri Reixac 15BarcelonaSpain
| | - Elena Rebollo
- Institute for Molecular Biology of Barcelona (IBMB, CSIC), Baldiri Reixac 15BarcelonaSpain
| | - Anna M Aragay
- Institute for Molecular Biology of Barcelona (IBMB, CSIC), Baldiri Reixac 15BarcelonaSpain
| | - María Isabel Geli
- Institute for Molecular Biology of Barcelona (IBMB, CSIC), Baldiri Reixac 15BarcelonaSpain
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Early Endosomal Vps34-Derived Phosphatidylinositol-3-Phosphate Is Indispensable for the Biogenesis of the Endosomal Recycling Compartment. Cells 2022; 11:cells11060962. [PMID: 35326413 PMCID: PMC8946653 DOI: 10.3390/cells11060962] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 02/17/2022] [Accepted: 03/09/2022] [Indexed: 12/29/2022] Open
Abstract
Phosphatidylinositol-3-phosphate (PI3P), a major identity tag of early endosomes (EEs), provides a platform for the recruitment of numerous cellular proteins containing an FYVE or PX domain that is required for PI3P-dependent maturation of EEs. Most of the PI3P in EEs is generated by the activity of Vps34, a catalytic component of class III phosphatidylinositol-3-phosphate kinase (PI3Ks) complex. In this study, we analyzed the role of Vps34-derived PI3P in the EE recycling circuit of unperturbed cells using VPS34-IN1 (IN1), a highly specific inhibitor of Vps34. IN1-mediated PI3P depletion resulted in the rapid dissociation of recombinant FYVE- and PX-containing PI3P-binding modules and endogenous PI3P-binding proteins, including EEA1 and EE sorting nexins. IN1 treatment triggered the rapid restructuring of EEs into a PI3P-independent functional configuration, and after IN1 washout, EEs were rapidly restored to a PI3P-dependent functional configuration. Analysis of the PI3P-independent configuration showed that the Vps34-derived PI3P is not essential for the pre-EE-associated functions and the fast recycling loop of the EE recycling circuit but contributes to EE maturation toward the degradation circuit, as previously shown in Vps34 knockout and knockdown studies. However, our study shows that Vps34-derived PI3P is also essential for the establishment of the Rab11a-dependent pathway, including recycling cargo sorting in this pathway and membrane flux from EEs to the pericentriolar endosomal recycling compartment (ERC). Rab11a endosomes of PI3P-depleted cells expanded and vacuolized outside the pericentriolar area without the acquisition of internalized transferrin (Tf). These endosomes had high levels of FIP5 and low levels of FIP3, suggesting that their maturation was arrested before the acquisition of FIP3. Consequently, Tf-loaded-, Rab11a/FIP5-, and Rab8a-positive endosomes disappeared from the pericentriolar area, implying that PI3P-associated functions are essential for ERC biogenesis. ERC loss was rapidly reversed after IN1 washout, which coincided with the restoration of FIP3 recruitment to Rab11a-positive endosomes and their dynein-dependent migration to the cell center. Thus, our study shows that Vps34-derived PI3P is indispensable in the recycling circuit to maintain the slow recycling pathway and biogenesis of the ERC.
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Hartman EJ, Asady B, Romano JD, Coppens I. The Rab11-Family Interacting Proteins reveal selective interaction of mammalian recycling endosomes with the Toxoplasma parasitophorous vacuole in a Rab11- and Arf6-dependent manner. Mol Biol Cell 2022; 33:ar34. [PMID: 35274991 PMCID: PMC9282008 DOI: 10.1091/mbc.e21-06-0284] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
After mammalian cell invasion, the parasite Toxoplasma multiplies in a self-made membrane-bound compartment, the parasitophorous vacuole (PV). We previously showed that Toxoplasma interacts with many host cell organelles, especially from recycling pathways, and sequestrates Rab11A and Rab11B vesicles into the PV. Here, we examine the specificity of host Rab11 vesicle interaction with the PV by focusing on the recruitment of subpopulations of Rab11 vesicles characterized by different effectors, for example, Rab11-family interacting roteins (FIPs) or Arf6. Our quantitative microscopic analysis illustrates the presence of intra-PV vesicles with FIPs from class I (FIP1C, FIP2, FIP5) and class II (FIP3, FIP4) but to various degrees. The intra-PV delivery of vesicles with class I, but not class II, FIPs is dependent on Rab11 binding. Cell depletion of Rab11A results in a significant decrease in intra-PV FIP5, but not FIP3 vesicles. Class II FIPs also bind to Arf6, and we observe vesicles associated with FIP3-Rab11A or FIP3-Arf6 complexes concomitantly within the PV. Abolishing FIP3 binding to both Rab11 and Arf6 reduces the number of intra-PV FIP3 vesicles. These data point to a selective process of mammalian Rab11 vesicle recognition and scavenging mediated by Toxoplasma, suggesting that specific parasite PV proteins may be involved in these processes.
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Affiliation(s)
- Eric J Hartman
- Department of Molecular Microbiology and Immunology, Johns Hopkins School of Public Health, 615N Wolfe Street, Baltimore, MD 21205, USA
| | - Beejan Asady
- Department of Molecular Microbiology and Immunology, Johns Hopkins School of Public Health, 615N Wolfe Street, Baltimore, MD 21205, USA
| | - Julia D Romano
- Department of Molecular Microbiology and Immunology, Johns Hopkins School of Public Health, 615N Wolfe Street, Baltimore, MD 21205, USA
| | - Isabelle Coppens
- Department of Molecular Microbiology and Immunology, Johns Hopkins School of Public Health, 615N Wolfe Street, Baltimore, MD 21205, USA
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Keren-Kaplan T, Bonifacino JS. ARL8 Relieves SKIP Autoinhibition to Enable Coupling of Lysosomes to Kinesin-1. Curr Biol 2020; 31:540-554.e5. [PMID: 33232665 DOI: 10.1016/j.cub.2020.10.071] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 09/16/2020] [Accepted: 10/23/2020] [Indexed: 01/24/2023]
Abstract
Long-range movement of organelles within the cytoplasm relies on coupling to microtubule motors, a process that is often mediated by adaptor proteins. In many cases, this coupling involves organelle- or adaptor-induced activation of the microtubule motors by conformational reversal of an autoinhibited state. Herein, we show that a similar regulatory mechanism operates for an adaptor protein named SKIP (also known as PLEKHM2). SKIP binds to the small guanosine triphosphatase (GTPase) ARL8 on the lysosomal membrane to couple lysosomes to the anterograde microtubule motor kinesin-1. Structure-function analyses of SKIP reveal that the C-terminal region comprising three pleckstrin homology (PH) domains interacts with the N-terminal region comprising ARL8- and kinesin-1-binding sites. This interaction inhibits coupling of lysosomes to kinesin-1 and, consequently, lysosome movement toward the cell periphery. We also find that ARL8 does not just recruit SKIP to the lysosomal membrane but also relieves SKIP autoinhibition, promoting kinesin-1-driven, anterograde lysosome transport. Finally, our analyses show that the largely disordered middle region of SKIP mediates self-association and that this self-association enhances the interaction of SKIP with kinesin-1. These findings indicate that SKIP is not just a passive connector of lysosome-bound ARL8 to kinesin-1 but is itself subject to intra- and inter-molecular interactions that regulate its function. We anticipate that similar organelle- or GTPase-induced conformational changes could regulate the activity of other kinesin adaptors.
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Affiliation(s)
- Tal Keren-Kaplan
- Neurosciences and Cellular and Structural Biology Division, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892, USA
| | - Juan S Bonifacino
- Neurosciences and Cellular and Structural Biology Division, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892, USA.
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Fisher S, Kuna D, Caspary T, Kahn RA, Sztul E. ARF family GTPases with links to cilia. Am J Physiol Cell Physiol 2020; 319:C404-C418. [PMID: 32520609 PMCID: PMC7500214 DOI: 10.1152/ajpcell.00188.2020] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The ADP-ribosylation factor (ARF) superfamily of regulatory GTPases, including both the ARF and ARF-like (ARL) proteins, control a multitude of cellular functions, including aspects of vesicular traffic, lipid metabolism, mitochondrial architecture, the assembly and dynamics of the microtubule and actin cytoskeletons, and other pathways in cell biology. Considering their general utility, it is perhaps not surprising that increasingly ARF/ARLs have been found in connection to primary cilia. Here, we critically evaluate the current knowledge of the roles four ARF/ARLs (ARF4, ARL3, ARL6, ARL13B) play in cilia and highlight key missing information that would help move our understanding forward. Importantly, these GTPases are themselves regulated by guanine nucleotide exchange factors (GEFs) that activate them and by GTPase-activating proteins (GAPs) that act as both effectors and terminators of signaling. We believe that the identification of the GEFs and GAPs and better models of the actions of these GTPases and their regulators will provide a much deeper understanding and appreciation of the mechanisms that underly ciliary functions and the causes of a number of human ciliopathies.
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Affiliation(s)
- Skylar Fisher
- 1Department of Biochemistry, Emory University
School of Medicine, Atlanta,
Georgia
| | - Damian Kuna
- 2Department of Cell, Developmental and Integrative
Biology, University of Alabama at Birmingham,
Birmingham, Alabama
| | - Tamara Caspary
- 3Department of Human Genetics, Emory
University School of Medicine, Atlanta,
Georgia
| | - Richard A. Kahn
- 1Department of Biochemistry, Emory University
School of Medicine, Atlanta,
Georgia
| | - Elizabeth Sztul
- 2Department of Cell, Developmental and Integrative
Biology, University of Alabama at Birmingham,
Birmingham, Alabama
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Kapitansky O, Gozes I. ADNP differentially interact with genes/proteins in correlation with aging: a novel marker for muscle aging. GeroScience 2019; 41:321-340. [PMID: 31264075 DOI: 10.1007/s11357-019-00079-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Accepted: 06/10/2019] [Indexed: 12/25/2022] Open
Abstract
Activity-dependent neuroprotective protein (ADNP) is essential for embryonic development with ADNP mutations leading to syndromic autism, coupled with intellectual disabilities and motor developmental delays. Here, mining human muscle gene-expression databases, we have investigated the association of ADNP transcripts with muscle aging. We discovered increased ADNP and its paralogue ADNP2 expression in the vastus lateralis muscle of aged compared to young subjects, as well as altered expression of the ADNP and the ADNP2 genes in bicep brachii muscle of elderly people, in a sex-dependent manner. Prolonged exercise resulted in decreased ADNP expression, and increased ADNP2 expression in an age-dependent manner in the vastus lateralis muscle. ADNP expression level was further correlated with 49 genes showing age-dependent changes in muscle transcript expression. A high degree of correlation with ADNP was discovered for 24 genes with the leading gene/protein being NMNAT1 (nicotinamide nucleotide adenylyl transferase 1). Looking at correlations differentiating the young and the old muscles and comparing protein interactions revealed an association of ADNP with the cell division cycle 5-like protein (CDC5L), and an aging-muscle-related interactive pathway in the vastus lateralis. In the bicep brachii, very high correlation was detected with genes associated with immune functions as well as mitochondrial structure and function among others. Taken together, the results suggest a direct association of ADNP with muscle strength and implicate ADNP fortification in the protection against age-associated muscle wasting.
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Affiliation(s)
- Oxana Kapitansky
- The Lily and Avraham Gildor Chair for the Investigation of Growth Factors; The Elton Laboratory for Neuroendocrinology; Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Sagol School of Neuroscience and Adams Super Center for Brain Studies, Tel Aviv University, 69978, Tel Aviv, Israel
| | - Illana Gozes
- The Lily and Avraham Gildor Chair for the Investigation of Growth Factors; The Elton Laboratory for Neuroendocrinology; Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Sagol School of Neuroscience and Adams Super Center for Brain Studies, Tel Aviv University, 69978, Tel Aviv, Israel.
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Essandoh K, Deng S, Wang X, Jiang M, Mu X, Peng J, Li Y, Peng T, Wagner KU, Rubinstein J, Fan GC. Tsg101 positively regulates physiologic-like cardiac hypertrophy through FIP3-mediated endosomal recycling of IGF-1R. FASEB J 2019; 33:7451-7466. [PMID: 30884248 DOI: 10.1096/fj.201802338rr] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Development of physiologic cardiac hypertrophy has primarily been ascribed to the IGF-1 and its receptor, IGF-1 receptor (IGF-1R), and subsequent activation of the protein kinase B (Akt) pathway. However, regulation of endosome-mediated recycling and degradation of IGF-1R during physiologic hypertrophy has not been investigated. In a physiologic hypertrophy model of treadmill-exercised mice, we observed that levels of tumor susceptibility gene 101 (Tsg101), a key member of the endosomal sorting complex required for transport, were dramatically elevated in the heart compared with sedentary controls. To determine the role of Tsg101 on physiologic hypertrophy, we generated a transgenic (TG) mouse model with cardiac-specific overexpression of Tsg101. These TG mice exhibited a physiologic-like cardiac hypertrophy phenotype at 8 wk evidenced by: 1) the absence of cardiac fibrosis, 2) significant improvement of cardiac function, and 3) increased total and plasma membrane levels of IGF-1R and increased phosphorylation of Akt. Mechanistically, we identified that Tsg101 interacted with family-interacting protein 3 (FIP3) and IGF-1R, thereby stabilizing FIP3 and enhancing recycling of IGF-1R. In vitro, adenovirus-mediated overexpression of Tsg101 in neonatal rat cardiomyocytes resulted in cell hypertrophy, which was blocked by addition of monensin, an inhibitor of endosome-mediated recycling, and by small interfering RNA-mediated knockdown (KD) of FIP3. Furthermore, cardiac-specific KD of Tsg101 showed a significant reduction in levels of endosomal recycling compartment members (Rab11a and FIP3), IGF-1R, and Akt phosphorylation. Most interestingly, Tsg101-KD mice failed to develop cardiac hypertrophy after intense treadmill training. Taken together, our data identify Tsg101 as a novel positive regulator of physiologic cardiac hypertrophy through facilitating the FIP3-mediated endosomal recycling of IGF-1R.-Essandoh, K., Deng, S., Wang, X., Jiang, M., Mu, X., Peng, J., Li, Y., Peng, T., Wagner, K.-U., Rubinstein, J., Fan, G.-C. Tsg101 positively regulates physiologic-like cardiac hypertrophy through FIP3-mediated endosomal recycling of IGF-1R.
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Affiliation(s)
- Kobina Essandoh
- Department of Pharmacology and Systems Physiology, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Shan Deng
- Department of Pharmacology and Systems Physiology, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA.,Department of Cardiology, Union Hospital-Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiaohong Wang
- Department of Pharmacology and Systems Physiology, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Min Jiang
- Division of Cardiovascular Health and Disease, Department of Internal Medicine, University of Cincinnati, Cincinnati, Ohio, USA
| | - Xingjiang Mu
- Department of Pharmacology and Systems Physiology, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Jiangtong Peng
- Department of Cardiology, Union Hospital-Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yutian Li
- Department of Pharmacology and Systems Physiology, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Tianqing Peng
- Critical Illness Research, Lawson Health Research Institute, London, Ontario, Canada
| | - Kay-Uwe Wagner
- Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, Michigan, USA
| | - Jack Rubinstein
- Division of Cardiovascular Health and Disease, Department of Internal Medicine, University of Cincinnati, Cincinnati, Ohio, USA
| | - Guo-Chang Fan
- Department of Pharmacology and Systems Physiology, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
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Del Río-Iñiguez I, Vázquez-Chávez E, Cuche C, Di Bartolo V, Bouchet J, Alcover A. HIV-1 Nef Hijacks Lck and Rac1 Endosomal Traffic To Dually Modulate Signaling-Mediated and Actin Cytoskeleton-Mediated T Cell Functions. THE JOURNAL OF IMMUNOLOGY 2018; 201:2624-2640. [PMID: 30282749 DOI: 10.4049/jimmunol.1800372] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Accepted: 09/03/2018] [Indexed: 01/03/2023]
Abstract
Endosomal traffic of TCR and signaling molecules regulates immunological synapse formation and T cell activation. We recently showed that Rab11 endosomes regulate the subcellular localization of the tyrosine kinase Lck and of the GTPase Rac1 and control their functions in TCR signaling and actin cytoskeleton remodeling. HIV-1 infection of T cells alters their endosomal traffic, activation capacity, and actin cytoskeleton organization. The viral protein Nef is pivotal for these modifications. We hypothesized that HIV-1 Nef could jointly alter Lck and Rac1 endosomal traffic and concomitantly modulate their functions. In this study, we show that HIV-1 infection of human T cells sequesters both Lck and Rac1 in a pericentrosomal compartment in an Nef-dependent manner. Strikingly, the Nef-induced Lck compartment contains signaling-competent forms (phosphorylated on key Tyr residues) of Lck and some of its downstream effectors, TCRζ, ZAP70, SLP76, and Vav1, avoiding the proximal LAT adaptor. Importantly, Nef-induced concentration of signaling molecules was concomitant with the upregulation of several early and late T cell activation genes. Moreover, preventing the concentration of the Nef-induced Lck compartment by depleting the Rab11 effector FIP3 counteracted Nef-induced gene expression upregulation. In addition, Nef extensively sequesters Rac1 and downregulates Rac1-dependent actin cytoskeleton remodeling, thus reducing T cell spreading. Therefore, by modifying their endosomal traffic, Nef hijacks signaling and actin cytoskeleton regulators to dually modulate their functional outputs. Our data shed new light into the molecular mechanisms that modify T cell physiology during HIV-1 infection.
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Affiliation(s)
- Iratxe Del Río-Iñiguez
- Lymphocyte Cell Biology Unit, Department of Immunology, Institut Pasteur, 75724 Paris, France.,INSERM U1221, 75015 Paris, France; and.,Collège Doctoral, Sorbonne Université, 75014 Paris, France
| | - Elena Vázquez-Chávez
- Lymphocyte Cell Biology Unit, Department of Immunology, Institut Pasteur, 75724 Paris, France.,INSERM U1221, 75015 Paris, France; and
| | - Céline Cuche
- Lymphocyte Cell Biology Unit, Department of Immunology, Institut Pasteur, 75724 Paris, France.,INSERM U1221, 75015 Paris, France; and
| | - Vincenzo Di Bartolo
- Lymphocyte Cell Biology Unit, Department of Immunology, Institut Pasteur, 75724 Paris, France.,INSERM U1221, 75015 Paris, France; and
| | - Jérôme Bouchet
- Lymphocyte Cell Biology Unit, Department of Immunology, Institut Pasteur, 75724 Paris, France; .,INSERM U1221, 75015 Paris, France; and
| | - Andrés Alcover
- Lymphocyte Cell Biology Unit, Department of Immunology, Institut Pasteur, 75724 Paris, France; .,INSERM U1221, 75015 Paris, France; and
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Liu Y, Liang Y, Li M, Liu D, Tang J, Yang W, Tong D, Jin X. Eps15 homology domain 1 promotes the evolution of papillary thyroid cancer by regulating endocytotic recycling of epidermal growth factor receptor. Oncol Lett 2018; 16:4263-4270. [PMID: 30214560 PMCID: PMC6126170 DOI: 10.3892/ol.2018.9200] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2017] [Accepted: 06/15/2018] [Indexed: 12/31/2022] Open
Abstract
Papillary thyroid cancer (PTC) is the most common type of thyroid malignancy, and it is often observed to overexpress epidermal growth factor receptor (EGFR). Previous research has indicated that EH domain-containing 1 (EHD1) is associated with EGFR-mediated endocytotic recycling in multiple tumor types. The objective of the present study was to determine the protein expression levels and clinical significance of EHD1, EGFR, caveolin-1 (CAV-1) and RAB11 family interacting protein 3 (RAB11FIP3) in PTC. PTC specimens were analyzed for EHD1, EGFR, CAV-1 and RAB11FIP3 expression via immunohistochemistry and western blotting. The associations between protein expression and clinicopathological features were assessed. EHD1, EGFR, CAV-1 and RAB11FIP3 expression levels were increased in human PTC. Additionally, the expression level of EHD1 protein was significantly associated with tumor size, lymph node metastasis and EGFR expression (P<0.05). CAV-1 was associated with tumor size and EGFR expression (P<0.05). EGFR was only associated with lymph node metastasis (P=0.027) and RAB11FIP3 was not associated with any clinicopathological characteristics. The correlations between EHD1 and EGFR (r=0.564, P<0.05), CAV-1 (r=0.865, P<0.01) and RAB11FIP3 (r=0.504, P<0.05) were statistically significant. Overall, EHD1, CAV-1 and RAB11FIP3, which are key proteins in endocytotic recycling, promote PTC tumorigenesis through the regulation of the transport of EGFR.
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Affiliation(s)
- Yu Liu
- Department of Pathology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Yanan Liang
- Department of Pathology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China.,College of Pharmacy, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Ming Li
- Institute of Iodine Deficiency Disorders, Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Duanyang Liu
- Department of Pathology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Jing Tang
- Department of Pathology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Weiwei Yang
- Department of Pathology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Dandan Tong
- Department of Pathology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Xiaoming Jin
- Department of Pathology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
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Abstract
Cytoplasmic dynein 1 is an important microtubule-based motor in many eukaryotic cells. Dynein has critical roles both in interphase and during cell division. Here, we focus on interphase cargoes of dynein, which include membrane-bound organelles, RNAs, protein complexes and viruses. A central challenge in the field is to understand how a single motor can transport such a diverse array of cargoes and how this process is regulated. The molecular basis by which each cargo is linked to dynein and its cofactor dynactin has started to emerge. Of particular importance for this process is a set of coiled-coil proteins - activating adaptors - that both recruit dynein-dynactin to their cargoes and activate dynein motility.
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Mulvaney EP, O'Meara F, Khan AR, O'Connell DJ, Kinsella BT. Identification of α-helix 4 (α4) of Rab11a as a novel Rab11-binding domain (RBD): Interaction of Rab11a with the Prostacyclin Receptor. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2017; 1864:1819-1832. [PMID: 28739266 DOI: 10.1016/j.bbamcr.2017.07.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Revised: 06/28/2017] [Accepted: 07/20/2017] [Indexed: 12/29/2022]
Abstract
The cellular trafficking of numerous G protein-coupled receptors (GPCRs) is known to be regulated by Rab proteins that involves a direct protein:protein interaction between the receptor and the GTPase. In the case of the human prostacyclin receptor (hIP), it undergoes agonist-induced internalization and subsequent Rab11a-dependent recyclization involving an interaction between a Rab11-binding domain (RBD) localized within its carboxyl-tail domain with Rab11a. However, the GPCR-interacting domain on Rab11a itself is unknown. Hence, we sought to identify the region within Rab11a that mediates its interaction with the RBD of the hIP. The α4 helix region of Rab11 was identified as a novel binding domain for the hIP, a site entirely distinct from the Switch I/Switch II -regions that act as specific binding domain for most other Rab and Ras-like GTPase interactants. Specifically, Glu138 within α4 helix of Rab11a appears to contact with key residues (e.g. Lys304) within the RBD of the hIP, where such contacts differ depending on the agonist-activated versus -inactive status of the hIP. Through mutational studies, supported by in silico homology modelling of the inactive and active hIP:Rab11a complexes, a mechanism is proposed to explain both the constitutive and agonist-induced binding of Rab11a to regulate intracellular trafficking of the hIP. Collectively, these studies are not only the first to identify α4 helix of Rab11a as a protein binding domain on the GTPase but also reveal novel mechanistic insights into the intracellular trafficking of the hIP, and potentially of other members of the GPCR superfamily, involving Rab11-dependent mechanisms.
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Affiliation(s)
- Eamon P Mulvaney
- UCD School of Biomolecular and Biomedical Sciences, UCD Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland
| | - Fergal O'Meara
- UCD School of Biomolecular and Biomedical Sciences, UCD Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland
| | - Amir R Khan
- School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin 2, Ireland
| | - David J O'Connell
- UCD School of Biomolecular and Biomedical Sciences, UCD Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland
| | - B Therese Kinsella
- UCD School of Biomolecular and Biomedical Sciences, UCD Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland.
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15
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Tong D, Liang YN, Stepanova AA, Liu Y, Li X, Wang L, Zhang F, Vasilyeva NV. Increased Eps15 homology domain 1 and RAB11FIP3 expression regulate breast cancer progression via promoting epithelial growth factor receptor recycling. Tumour Biol 2017; 39:1010428317691010. [DOI: 10.1177/1010428317691010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Recent research indicates that the C-terminal Eps15 homology domain 1 is associated with epithelial growth factor receptor–mediated endocytosis recycling in non-small-cell lung cancer. The aim of this study was to determine the clinical significance of Eps15 homology domain 1 gene expression in relation to phosphorylation of epithelial growth factor receptor expression in patients with breast cancer. Primary breast cancer samples from 306 patients were analyzed for Eps15 homology domain 1, RAB11FIP3, and phosphorylation of epithelial growth factor receptor expression via immunohistochemistry. The clinical significance was assessed via a multivariate Cox regression analysis, Kaplan–Meier curves, and the log-rank test. Eps15 homology domain 1 and phosphorylation of epithelial growth factor receptor were upregulated in 60.46% (185/306) and 53.92% (165/306) of tumor tissues, respectively, as assessed by immunohistochemistry. The statistical correlation analysis indicated that Eps15 homology domain 1 overexpression was positively correlated with the increases in phosphorylation of epithelial growth factor receptor ( r = 0.242, p < 0.001) and RAB11FIP3 ( r = 0.165, p = 0.005) expression. The multivariate Cox proportional hazard model analysis demonstrated that the expression of Eps15 homology domain 1 alone is a significant prognostic marker of breast cancer for the overall survival in the total, chemotherapy, and human epidermal growth factor receptor 2 (−) groups. However, the use of combined expression of Eps15 homology domain 1 and phosphorylation of epithelial growth factor receptor markers is more effective for the disease-free survival in the overall population, chemotherapy, and human epidermal growth factor receptor 2 (−) groups. Moreover, the combined markers are also significant prognostic markers of breast cancer in the human epidermal growth factor receptor 2 (+), estrogen receptor (+), and estrogen receptor (−) groups. Eps15 homology domain 1 has a tumor suppressor function, and the combined marker of Eps15 homology domain 1/phosphorylation of epithelial growth factor receptor expression was identified as a better prognostic marker in breast cancer diagnosis. Furthermore, RAB11FIP3 combines with Eps15 homology domain 1 to promote the endocytosis recycling of phosphorylation of epithelial growth factor receptor.
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Affiliation(s)
- Dandan Tong
- Department of Pathology, Harbin Medical University, Harbin, China
| | - Ya-Nan Liang
- Department of Pathology, Harbin Medical University, Harbin, China
- College of Pharmacy, Harbin Medical University, Harbin, China
| | - AA Stepanova
- Kashkin Research Institute of Medical Mycology, I.I. Mechnikov North-Western State Medical University, Saint Petersburg, Russia
| | - Yu Liu
- Department of Pathology, Harbin Medical University, Harbin, China
| | - Xiaobo Li
- Department of Pathology, Harbin Medical University, Harbin, China
| | - Letian Wang
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China
| | - Fengmin Zhang
- Department of Pathology, Harbin Medical University, Harbin, China
| | - NV Vasilyeva
- Kashkin Research Institute of Medical Mycology, I.I. Mechnikov North-Western State Medical University, Saint Petersburg, Russia
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Bouchet J, McCaffrey MW, Graziani A, Alcover A. The functional interplay of Rab11, FIP3 and Rho proteins on the endosomal recycling pathway controls cell shape and symmetry. Small GTPases 2016; 9:310-315. [PMID: 27533792 PMCID: PMC5997156 DOI: 10.1080/21541248.2016.1224288] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Several families of small GTPases regulate a variety of fundamental cellular processes, encompassing growth factor signal transduction, vesicular trafficking and control of the cytoskeleton. Frequently, their action is hierarchical and complementary, but much of the detail of their functional interactions remains to be clarified. It is well established that Rab family members regulate a variety of intracellular vesicle trafficking pathways. Moreover, Rho family GTPases are pivotal for the control of the actin and microtubule cytoskeleton. However, the interplay between these 2 types of GTPases has been rarely reported. We discuss here our recent findings showing that Rab11, a key regulator of endosomal recycling, and Rac1, a central actin cytoskeleton regulator involved in lamellipodium formation and cell migration, interplay on endosomes through the Rab11 effector FIP3. In the context of the rapidly reactive T lymphocytes, Rab11-Rac1 endosomal functional interplay is important to control cell shape changes and cell symmetry during lymphocyte spreading and immunological synapse formation and ultimately modulate T cell activation.
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Affiliation(s)
- Jérôme Bouchet
- a Institut Pasteur, Department of Immunology , Lymphocyte Cell Biology Unit , Paris , France.,b INSERM U1221 , Paris , France.,c Institut Cochin, INSERM U1016, CNRS, UMR8104, Université Paris Descartes, Sorbonne Paris Cité , Paris , France
| | - Mary W McCaffrey
- d Molecular Cell Biology Laboratory, School of Biochemistry and Cell Biology, Biosciences Institute, University College , Cork , Ireland
| | | | - Andrés Alcover
- a Institut Pasteur, Department of Immunology , Lymphocyte Cell Biology Unit , Paris , France.,b INSERM U1221 , Paris , France
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17
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Abstract
Influenza A viruses (IAVs) harbor a segmented RNA genome that is organized into eight distinct viral ribonucleoprotein (vRNP) complexes. Although a segmented genome may be a major advantage to adapt to new host environments, it comes at the cost of a highly sophisticated genome packaging mechanism. Newly synthesized vRNPs conquer the cellular endosomal recycling machinery to access the viral budding site at the plasma membrane. Genome packaging sequences unique to each RNA genome segment are thought to be key determinants ensuring the assembly and incorporation of eight distinct vRNPs into progeny viral particles. Recent studies using advanced fluorescence microscopy techniques suggest the formation of vRNP sub-bundles (comprising less than eight vRNPs) during their transport on recycling endosomes. The formation of such sub-bundles might be required for efficient packaging of a bundle of eight different genomes segments at the budding site, further highlighting the complexity of IAV genome packaging.
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18
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Vertii A, Ivshina M, Zimmerman W, Hehnly H, Kant S, Doxsey S. The Centrosome Undergoes Plk1-Independent Interphase Maturation during Inflammation and Mediates Cytokine Release. Dev Cell 2016; 37:377-386. [PMID: 27219065 DOI: 10.1016/j.devcel.2016.04.023] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2015] [Revised: 04/09/2016] [Accepted: 04/26/2016] [Indexed: 01/11/2023]
Abstract
Cytokine production is a necessary event in the immune response during inflammation and is associated with mortality during sepsis, autoimmune disorders, cancer, and diabetes. Stress-activated MAP kinase signaling cascades that mediate cytokine synthesis are well established. However, the downstream fate of cytokines before they are secreted remains elusive. We report that pro-inflammatory stimuli lead to recruitment of pericentriolar material, specifically pericentrin and γ-tubulin, to the centrosome. This is accompanied by enhanced microtubule nucleation and enrichment of the recycling endosome component FIP3, all of which are hallmarks of centrosome maturation during mitosis. Intriguingly, centrosome maturation occurs during interphase in an MLK-dependent manner, independent of the classic mitotic kinase, Plk1. Centrosome disruption by chemical prevention of centriole assembly or genetic ablation of pericentrin attenuated interleukin-6, interleukin-10, and MCP1 secretion, suggesting that the centrosome is critical for cytokine production. Our results reveal a function of the centrosome in innate immunity.
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Affiliation(s)
- Anastassiia Vertii
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01605, USA; Department of Molecular, Cell and Cancer Biology, University of Massachusetts Medical School, Worcester, MA 01605, USA.
| | - Maria Ivshina
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - Wendy Zimmerman
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - Heidi Hehnly
- Department of Cell and Developmental Biology, SUNY Upstate Medical University, Syracuse, NY 13210, USA
| | - Shashi Kant
- Division of Cardiovascular Medicine, Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - Stephen Doxsey
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01605, USA.
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19
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Bouchet J, Del Río-Iñiguez I, Lasserre R, Agüera-Gonzalez S, Cuche C, Danckaert A, McCaffrey MW, Di Bartolo V, Alcover A. Rac1-Rab11-FIP3 regulatory hub coordinates vesicle traffic with actin remodeling and T-cell activation. EMBO J 2016; 35:1160-74. [PMID: 27154205 DOI: 10.15252/embj.201593274] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Accepted: 04/05/2016] [Indexed: 11/09/2022] Open
Abstract
The immunological synapse generation and function is the result of a T-cell polarization process that depends on the orchestrated action of the actin and microtubule cytoskeleton and of intracellular vesicle traffic. However, how these events are coordinated is ill defined. Since Rab and Rho families of GTPases control intracellular vesicle traffic and cytoskeleton reorganization, respectively, we investigated their possible interplay. We show here that a significant fraction of Rac1 is associated with Rab11-positive recycling endosomes. Moreover, the Rab11 effector FIP3 controls Rac1 intracellular localization and Rac1 targeting to the immunological synapse. FIP3 regulates, in a Rac1-dependent manner, key morphological events, like T-cell spreading and synapse symmetry. Finally, Rab11-/FIP3-mediated regulation is necessary for T-cell activation leading to cytokine production. Therefore, Rac1 endosomal traffic is key to regulate T-cell activation.
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Affiliation(s)
- Jérôme Bouchet
- Lymphocyte Cell Biology Unit, Department of Immunology, Institut Pasteur, Paris, France CNRS URA 1961, Paris, France INSERM U1221, Paris, France
| | - Iratxe Del Río-Iñiguez
- Lymphocyte Cell Biology Unit, Department of Immunology, Institut Pasteur, Paris, France CNRS URA 1961, Paris, France INSERM U1221, Paris, France
| | - Rémi Lasserre
- Lymphocyte Cell Biology Unit, Department of Immunology, Institut Pasteur, Paris, France CNRS URA 1961, Paris, France
| | - Sonia Agüera-Gonzalez
- Lymphocyte Cell Biology Unit, Department of Immunology, Institut Pasteur, Paris, France CNRS URA 1961, Paris, France
| | - Céline Cuche
- Lymphocyte Cell Biology Unit, Department of Immunology, Institut Pasteur, Paris, France CNRS URA 1961, Paris, France INSERM U1221, Paris, France
| | | | - Mary W McCaffrey
- Molecular Cell Biology Laboratory, Biosciences Institute, School of Biochemistry and Cell Biology, University College Cork, Cork, Ireland
| | - Vincenzo Di Bartolo
- Lymphocyte Cell Biology Unit, Department of Immunology, Institut Pasteur, Paris, France CNRS URA 1961, Paris, France INSERM U1221, Paris, France
| | - Andrés Alcover
- Lymphocyte Cell Biology Unit, Department of Immunology, Institut Pasteur, Paris, France CNRS URA 1961, Paris, France INSERM U1221, Paris, France
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20
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Schafer JC, McRae RE, Manning EH, Lapierre LA, Goldenring JR. Rab11-FIP1A regulates early trafficking into the recycling endosomes. Exp Cell Res 2016; 340:259-73. [PMID: 26790954 PMCID: PMC4744548 DOI: 10.1016/j.yexcr.2016.01.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2015] [Revised: 12/19/2015] [Accepted: 01/10/2016] [Indexed: 12/31/2022]
Abstract
The Rab11 family of small GTPases, along with the Rab11-family interacting proteins (Rab11-FIPs), are critical regulators of intracellular vesicle trafficking and recycling. We have identified a point mutation of Threonine-197 site to an Alanine in Rab11-FIP1A, which causes a dramatic dominant negative phenotype when expressed in HeLa cells. The normally perinuclear distribution of GFP-Rab11-FIP1A was condensed into a membranous cisternum with almost no GFP-Rab11-FIP1A(T197A) remaining outside of this central locus. Also, this condensed GFP-FIP1A(T197A) altered the distribution of proteins in the Rab11a recycling pathway including endogenous Rab11a, Rab11-FIP1C, and transferrin receptor (CD71). Furthermore, this condensed GFP-FIP1A(T197A)-containing structure exhibited little movement in live HeLa cells. Expression of GFP-FIP1A(T197A) caused a strong blockade of transferrin recycling. Treatment of cells expressing GFP-FIP1A(T197A) with nocodazole did not disperse the Rab11a-containing recycling system. We also found that Rab5 and EEA1 were accumulated in membranes by GFP-Rab11-FIP1A but Rab4 was unaffected, suggesting that a direct pathway may exist from early endosomes into the Rab11a-containing recycling system. Our study of a potent inhibitory trafficking mutation in Rab11-FIP1A shows that Rab11-FIP1A associates with and regulates trafficking at an early step in the process of membrane recycling.
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Affiliation(s)
- Jenny C Schafer
- Departments of Surgery, Nashville, TN, USA; Epithelial Biology Center, Nashville, TN, USA
| | - Rebecca E McRae
- Departments of Surgery, Nashville, TN, USA; Cell & Developmental Biology, Nashville, TN, USA; Epithelial Biology Center, Nashville, TN, USA
| | - Elizabeth H Manning
- Departments of Surgery, Nashville, TN, USA; Epithelial Biology Center, Nashville, TN, USA
| | - Lynne A Lapierre
- Departments of Surgery, Nashville, TN, USA; Epithelial Biology Center, Nashville, TN, USA
| | - James R Goldenring
- Departments of Surgery, Nashville, TN, USA; Cell & Developmental Biology, Nashville, TN, USA; Epithelial Biology Center, Nashville, TN, USA; Vanderbilt University School of Medicine and the Nashville VA Medical Center, Nashville, TN, USA.
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21
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Vetter M, Wang J, Lorentzen E, Deretic D. Novel topography of the Rab11-effector interaction network within a ciliary membrane targeting complex. Small GTPases 2015; 6:165-73. [PMID: 26399276 DOI: 10.1080/21541248.2015.1091539] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
Small GTPases function as universal molecular switches due to the nucleotide dependent conformational changes of their switch regions that allow interacting proteins to discriminate between the active GTP-bound and the inactive GDP-bound states. Guanine nucleotide exchange factors (GEFs) recognize the inactive GDP-bound conformation whereas GTPase activating proteins (GAPs), and the GTPase effectors recognize the active GTP-bound state. Small GTPases are linked to each other through regulatory and effector proteins into functional networks that regulate intracellular membrane traffic through diverse mechanisms that include GEF and GAP cascades, GEF-effector interactions, common effectors and positive feedback loops linking interacting proteins. As more structural and functional information is becoming available, new types of interactions between regulatory proteins, and new mechanisms by which GTPases are networked to control membrane traffic are being revealed. This review will focus on the structure and function of the novel Rab11-FIP3-Rabin8 dual effector complex and its implications for the targeting of sensory receptors to primary cilia, dysfunction of which causes cilia defects underlying human diseases and disorders know as ciliopathies.
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Affiliation(s)
- Melanie Vetter
- a Department of Structural Cell Biology ; Max-Planck-Institute of Biochemistry ; Martinsried , Germany
| | - Jing Wang
- b Departments of Surgery ; Division of Ophthalmology; University of New Mexico ; Albuquerque , NM USA
| | - Esben Lorentzen
- a Department of Structural Cell Biology ; Max-Planck-Institute of Biochemistry ; Martinsried , Germany
| | - Dusanka Deretic
- b Departments of Surgery ; Division of Ophthalmology; University of New Mexico ; Albuquerque , NM USA.,c Cell Biology and Physiology ; University of New Mexico ; Albuquerque , NM USA
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22
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Structure of Rab11-FIP3-Rabin8 reveals simultaneous binding of FIP3 and Rabin8 effectors to Rab11. Nat Struct Mol Biol 2015; 22:695-702. [PMID: 26258637 DOI: 10.1038/nsmb.3065] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2015] [Accepted: 07/07/2015] [Indexed: 12/20/2022]
Abstract
The small GTPase Rab11 and its effectors FIP3 and Rabin8 are essential to membrane-trafficking pathways required for cytokinesis and ciliogenesis. Although effector binding is generally assumed to be sequential and mutually exclusive, we show that Rab11 can simultaneously bind FIP3 and Rabin8. We determined crystal structures of human Rab11-GMPPNP-Rabin8 and Rab11-GMPPNP-FIP3-Rabin8. The structures reveal that the C-terminal domain of Rabin8 adopts a previously undescribed fold that interacts with Rab11 at an unusual effector-binding site neighboring the canonical FIP3-binding site. We show that Rab11-GMPPNP-FIP3-Rabin8 is more stable than Rab11-GMPPNP-Rabin8, owing to direct interaction between Rabin8 and FIP3 within the dual effector-bound complex. The data allow us to propose a model for how membrane-targeting complexes assemble at the trans-Golgi network and recycling endosomes, through multiple weak interactions that create high-avidity complexes.
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23
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Di Gioia SA, Farinelli P, Letteboer SJF, Arsenijevic Y, Sharon D, Roepman R, Rivolta C. Interactome analysis reveals that FAM161A, deficient in recessive retinitis pigmentosa, is a component of the Golgi-centrosomal network. Hum Mol Genet 2015; 24:3359-71. [PMID: 25749990 DOI: 10.1093/hmg/ddv085] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2014] [Accepted: 03/04/2015] [Indexed: 11/13/2022] Open
Abstract
Defects in FAM161A, a protein of unknown function localized at the cilium of retinal photoreceptor cells, cause retinitis pigmentosa, a form of hereditary blindness. By using different fragments of this protein as baits to screen cDNA libraries of human and bovine retinas, we defined a yeast two-hybrid-based FAM161A interactome, identifying 53 bona fide partners. In addition to statistically significant enrichment in ciliary proteins, as expected, this interactome revealed a substantial bias towards proteins from the Golgi apparatus, the centrosome and the microtubule network. Validation of interaction with key partners by co-immunoprecipitation and proximity ligation assay confirmed that FAM161A is a member of the recently recognized Golgi-centrosomal interactome, a network of proteins interconnecting Golgi maintenance, intracellular transport and centrosome organization. Notable FAM161A interactors included AKAP9, FIP3, GOLGA3, KIFC3, KLC2, PDE4DIP, NIN and TRIP11. Furthermore, analysis of FAM161A localization during the cell cycle revealed that this protein followed the centrosome during all stages of mitosis, likely reflecting a specific compartmentalization related to its role at the ciliary basal body during the G0 phase. Altogether, these findings suggest that FAM161A's activities are probably not limited to ciliary tasks but also extend to more general cellular functions, highlighting possible novel mechanisms for the molecular pathology of retinal disease.
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Affiliation(s)
| | - Pietro Farinelli
- Department of Medical Genetics, University of Lausanne, Lausanne, Switzerland
| | - Stef J F Letteboer
- Department of Human Genetics and Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands and
| | - Yvan Arsenijevic
- Unit of Gene Therapy and Stem Cell Biology, Jules-Gonin Eye Hospital, University of Lausanne, Lausanne, Switzerland
| | - Dror Sharon
- Department of Ophthalmology, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Ronald Roepman
- Department of Human Genetics and Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands and
| | - Carlo Rivolta
- Department of Medical Genetics, University of Lausanne, Lausanne, Switzerland
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24
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Wang J, Deretic D. The Arf and Rab11 effector FIP3 acts synergistically with ASAP1 to direct Rabin8 in ciliary receptor targeting. J Cell Sci 2015; 128:1375-85. [PMID: 25673879 DOI: 10.1242/jcs.162925] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Primary cilia have gained considerable importance in biology and disease now that their involvement in a wide range of human ciliopathies has been abundantly documented. However, detailed molecular mechanisms for specific targeting of sensory receptors to primary cilia are still unknown. Here, we show that the Arf and Rab11 effector FIP3 (also known as RAB11FIP3) promotes the activity of Rab11a and the Arf GTPase-activating protein (GAP) ASAP1 in the Arf4-dependent ciliary transport of the sensory receptor rhodopsin. During its passage out of the photoreceptor Golgi and trans-Golgi network (TGN), rhodopsin indirectly interacts with FIP3 through Rab11a and ASAP1. FIP3 competes with rhodopsin for binding to ASAP1 and displaces it from the ternary complex with Arf4-GTP and ASAP1. Resembling the phenotype resulting from </emph>lack of ASAP1, ablation of FIP3 abolishes ciliary targeting and causes rhodopsin mislocalization. FIP3 coordinates the interactions of ASAP1 and Rab11a with the Rab8 guanine nucleotide exchange factor Rabin8 (also known as RAB3IP). Our study implies that FIP3 functions as a crucial targeting regulator, which impinges on rhodopsin-ASAP1 interactions and shapes the binding pocket for Rabin8 within the ASAP1-Rab11a-FIP3 targeting complex, thus facilitating the orderly assembly and activation of the Rab11-Rabin8-Rab8 cascade during ciliary receptor trafficking.
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Affiliation(s)
- Jing Wang
- Department of Surgery, Division of Ophthalmology, University of New Mexico, Albuquerque, NM 87131, USA
| | - Dusanka Deretic
- Department of Surgery, Division of Ophthalmology, University of New Mexico, Albuquerque, NM 87131, USA Department of Cell Biology and Physiology, University of New Mexico, Albuquerque, NM 87131, USA
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25
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Braun AC, Hendrick J, Eisler SA, Schmid S, Hausser A, Olayioye MA. The Rho-specific GAP protein DLC3 coordinates endocytic membrane trafficking. J Cell Sci 2015; 128:1386-99. [PMID: 25673874 DOI: 10.1242/jcs.163857] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Membrane trafficking is known to be coordinated by small GTPases, but the identity of their regulators, the guanine nucleotide exchange factors (GEFs) and GTPase-activating proteins (GAPs) that ensure balanced GTPase activation at different subcellular sites is largely elusive. Here, we show in living cells that deleted in liver cancer 3 (DLC3, also known as STARD8) is a functional Rho-specific GAP protein, the loss of which enhances perinuclear RhoA activity. DLC3 is recruited to Rab8-positive membrane tubules and is required for the integrity of the Rab8 and Golgi compartments. Depletion of DLC3 impairs the transport of internalized transferrin to the endocytic recycling compartment (ERC), which is restored by the simultaneous downregulation of RhoA and RhoB. We further demonstrate that DLC3 loss interferes with epidermal growth factor receptor (EGFR) degradation associated with prolonged receptor signaling. Taken together, these findings identify DLC3 as a novel component of the endocytic trafficking machinery, wherein it maintains organelle integrity and regulates membrane transport through the control of Rho activity.
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Affiliation(s)
- Anja C Braun
- Institute of Cell Biology and Immunology, University of Stuttgart, Allmandring 31, 70569 Stuttgart, Germany
| | - Janina Hendrick
- Institute of Cell Biology and Immunology, University of Stuttgart, Allmandring 31, 70569 Stuttgart, Germany
| | - Stephan A Eisler
- Institute of Cell Biology and Immunology, University of Stuttgart, Allmandring 31, 70569 Stuttgart, Germany
| | - Simone Schmid
- Institute of Cell Biology and Immunology, University of Stuttgart, Allmandring 31, 70569 Stuttgart, Germany
| | - Angelika Hausser
- Institute of Cell Biology and Immunology, University of Stuttgart, Allmandring 31, 70569 Stuttgart, Germany
| | - Monilola A Olayioye
- Institute of Cell Biology and Immunology, University of Stuttgart, Allmandring 31, 70569 Stuttgart, Germany
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26
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Burke JE, Inglis AJ, Perisic O, Masson GR, McLaughlin SH, Rutaganira F, Shokat KM, Williams RL. Structures of PI4KIIIβ complexes show simultaneous recruitment of Rab11 and its effectors. Science 2014; 344:1035-8. [PMID: 24876499 DOI: 10.1126/science.1253397] [Citation(s) in RCA: 108] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Phosphatidylinositol 4-kinases (PI4Ks) and small guanosine triphosphatases (GTPases) are essential for processes that require expansion and remodeling of phosphatidylinositol 4-phosphate (PI4P)-containing membranes, including cytokinesis, intracellular development of malarial pathogens, and replication of a wide range of RNA viruses. However, the structural basis for coordination of PI4K, GTPases, and their effectors is unknown. Here, we describe structures of PI4Kβ (PI4KIIIβ) bound to the small GTPase Rab11a without and with the Rab11 effector protein FIP3. The Rab11-PI4KIIIβ interface is distinct compared with known structures of Rab complexes and does not involve switch regions used by GTPase effectors. Our data provide a mechanism for how PI4KIIIβ coordinates Rab11 and its effectors on PI4P-enriched membranes and also provide strategies for the design of specific inhibitors that could potentially target plasmodial PI4KIIIβ to combat malaria.
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Affiliation(s)
- John E Burke
- Medical Research Council (MRC) Laboratory of Molecular Biology, Cambridge CB2 0QH, UK.
| | - Alison J Inglis
- Medical Research Council (MRC) Laboratory of Molecular Biology, Cambridge CB2 0QH, UK
| | - Olga Perisic
- Medical Research Council (MRC) Laboratory of Molecular Biology, Cambridge CB2 0QH, UK
| | - Glenn R Masson
- Medical Research Council (MRC) Laboratory of Molecular Biology, Cambridge CB2 0QH, UK
| | - Stephen H McLaughlin
- Medical Research Council (MRC) Laboratory of Molecular Biology, Cambridge CB2 0QH, UK
| | - Florentine Rutaganira
- Howard Hughes Medical Institute and Department of Cellular and Molecular Pharmacology, University of California, San Francisco (UCSF), San Francisco, CA 94158, USA
| | - Kevan M Shokat
- Howard Hughes Medical Institute and Department of Cellular and Molecular Pharmacology, University of California, San Francisco (UCSF), San Francisco, CA 94158, USA
| | - Roger L Williams
- Medical Research Council (MRC) Laboratory of Molecular Biology, Cambridge CB2 0QH, UK.
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27
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Yazaki Y, Hara Y, Tamaki H, Fukaya M, Sakagami H. Endosomal localization of FIP3/Arfophilin-1 and its involvement in dendritic formation of mouse hippocampal neurons. Brain Res 2014; 1557:55-65. [PMID: 24576489 DOI: 10.1016/j.brainres.2014.02.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2013] [Revised: 02/06/2014] [Accepted: 02/08/2014] [Indexed: 11/26/2022]
Abstract
Endosomal trafficking mediated by Rab11 and Arf6 small GTPases is essential for various neuronal functions. Family of Rab11-interacting protein 3 (FIP3)/Arfophilin-1, also termed Eferin, is a dual effector for Rab11 and Arf6 and implicated in endosomal trafficking during cytokinesis. To understand the neuronal functions of FIP3, we first showed the widespread neuronal expression of FIP3 mRNA in adult mouse brain by in situ hybridization. Immunohistochemical analysis showed the association of FIP3 with a subpopulation of endosomes labeled with EEA1 and syntaxin 12 in hippocampal neurons. Immunoblot analysis showed the progressive increase of FIP3 with a peak around postnatal day 15 during hippocampal development. Furthermore, knockdown of endogenous FIP3 decreased the total dendritic length of cultured hippocampal neurons with a concomitant increase in the number of short (<40μm) primary dendrites. Together, FIP3 is suggested to regulate dendritic formation possibly through Rab11- and Arf6-mediated endosomal trafficking.
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Affiliation(s)
- Yuuki Yazaki
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Kanagawa 252-0329, Japan
| | - Yoshinobu Hara
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Kanagawa 252-0329, Japan
| | - Hideaki Tamaki
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Kanagawa 252-0329, Japan
| | - Masahiro Fukaya
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Kanagawa 252-0329, Japan
| | - Hiroyuki Sakagami
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Kanagawa 252-0329, Japan.
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28
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Horgan CP, Hanscom SR, McCaffrey MW. GRAB is a binding partner for the Rab11a and Rab11b GTPases. Biochem Biophys Res Commun 2013; 441:214-9. [PMID: 24140058 DOI: 10.1016/j.bbrc.2013.10.043] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2013] [Accepted: 10/09/2013] [Indexed: 11/20/2022]
Abstract
Co-ordination of Rab GTPase function has emerged as a crucial mechanism in the control of intracellular trafficking processes in eukaryotic cells. Here, we show that GRAB/Rab3IL1 [guanine nucleotide exchange factor for Rab3A; RAB3A interacting protein (rabin3)-like 1], a protein that has previously be shown to act as a GEF (guanine nucleotide exchange factor) for Rab3a, Rab8a and Rab8b, is also a binding partner for Rab11a and Rab11b, but not the closely related Rab25 GTPase. We demonstrate that exogenous expression of Rab11a and Rab11b shift GRAB's distribution from the cytoplasm onto membranes. We find that the Rab11a/Rab11b-binding region of GRAB lies within its carboxy-terminus, a region distinct from its GEF domain and Rab3a-binding region. Finally, we describe a GRAB deletion mutant (GRABΔ223-228) that is deficient in Rab11-binding ability. These data identify GRAB as a dual Rab-binding protein that could potentially link Rab3 and Rab11 and/or Rab8 and Rab11-mediated intracellular trafficking processes.
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Affiliation(s)
- Conor P Horgan
- Molecular Cell Biology Laboratory, School of Biochemistry and Cell Biology, BioSciences Institute, University College Cork, Cork, Ireland.
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Abstract
Comprising over 60 members, Rab proteins constitute the largest branch of the Ras superfamily of low-molecular-mass G-proteins. This protein family have been primarily implicated in various aspects of intracellular membrane trafficking processes. On the basis of distinct subfamily-specific sequence motifs, many Rabs have been grouped into subfamilies. The Rab11 GTPase subfamily comprises three members: Rab11a, Rab11b and Rab25/Rab11c, which, between them, have been demonstrated to bind more than 30 proteins. In the present paper, we review the function of the Rab11 subfamily. We describe their localization and primary functional roles within the cell and their implication, to date, in disease processes. We also summarize the protein machinery currently known to regulate or mediate their functions and the cargo molecules which they have been shown to transport.
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30
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Baetz NW, Goldenring JR. Rab11-family interacting proteins define spatially and temporally distinct regions within the dynamic Rab11a-dependent recycling system. Mol Biol Cell 2013; 24:643-58. [PMID: 23283983 PMCID: PMC3583667 DOI: 10.1091/mbc.e12-09-0659] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
The Rab11-family interacting proteins (Rab11-FIPs) facilitate Rab11-dependent vesicle recycling. We hypothesized that Rab11-FIPs define discrete subdomains and carry out temporally distinct roles within the recycling system. We used live-cell deconvolution microscopy of HeLa cells expressing chimeric fluorescent Rab11-FIPs to examine Rab11-FIP localization, transferrin passage through Rab11-FIP-containing compartments, and overlap among Rab11-FIPs within the recycling system. FIP1A, FIP2, and FIP5 occupy widely distributed mobile tubules and vesicles, whereas FIP1B, FIP1C, and FIP3 localize to perinuclear tubules. Internalized transferrin entered Rab11-FIP-containing compartments within 5 min, reaching maximum colocalization with FIP1B and FIP2 early in the time course, whereas localization with FIP1A, FIP1C, FIP3, and FIP5 was delayed until 10 min or later. Whereas direct interactions with FIP1A were only observed for FIP1B and FIP1C, FIP1A also associated with membranes containing FIP3. Live-cell dual-expression studies of Rab11-FIPs revealed the tubular dynamics of Rab11-FIP-containing compartments and demonstrated a series of selective associations among Rab11-FIPs in real time. These findings suggest that Rab11-FIP1 proteins participate in spatially and temporally distinct steps of the recycling process along a complex and dynamic tubular network in which Rab11-FIPs occupy discrete domains.
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Affiliation(s)
- Nicholas W Baetz
- Section of Surgical Sciences and Epithelial Biology Center, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
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31
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Moore FB, Baleja JD. Molecular remodeling mechanisms of the neural somatodendritic compartment. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2012; 1823:1720-30. [PMID: 22705351 DOI: 10.1016/j.bbamcr.2012.06.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2012] [Revised: 06/06/2012] [Accepted: 06/07/2012] [Indexed: 12/28/2022]
Abstract
Neuronal cells use the process of vesicle trafficking to manipulate the populations of neurotransmitter receptors and other membrane proteins. Long term potentiation (LTP) is a long-lived increase in synaptic strength between neurons and increases postsynaptic dendritic spine size and the concentration of the α-amino-3-hydroxy-5-methyl-4-isoxazole propionate-type glutamate receptor (AMPAR) located in the postsynaptic density. AMPAR is removed from the cell surface via clathrin-mediated endocytosis. While the adaptor protein 2 (AP2) complex of endocytosis seems to have the components needed to allow temporal and spatial regulations of internalization, many accessory proteins are involved, such as epidermal growth factor receptor phosphorylation substrate 15 (Eps15). A sequence of repeats in the Eps15 protein is known as the Eps15 homology (EH) domain. It has affinity for asparagine-proline-phenylalanine (NPF) sequences that are contained within vesicle trafficking proteins such as epsin, Rab11 family interacting protein 2 (Rab11-FIP2), and Numb. After endocytosis, a pool of AMPAR is stored in the endosomal recycling compartment that can be transported to the dendritic spine surface upon stimulation during LTP for lateral diffusion into the postsynaptic density. Rab11 and the Eps15 homologue EHD1 are involved in receptor recycling. EHD family members are also involved in transcytosis of the neuronal cell adhesion molecule neuron-glia cell adhesion molecule (NgCAM) from the somatodendritic compartment to the axon. Neurons have a unique morphology comprising many projections of membrane that is constructed in part by the effects of the Eps15 homologue, intersectin. Morphogenesis in the somatodendritic compartment is becoming better understood, but there is still much exciting territory to explore, especially regarding the roles of various EH domain-NPF interactions in endocytic and recycling processes.
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Affiliation(s)
- Fletcher B Moore
- Department of Biochemistry, Tufts University School of Medicine, Boston, MA 02111, USA
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32
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Collins LL, Simon G, Matheson J, Wu C, Miller MC, Otani T, Yu X, Hayashi S, Prekeris R, Gould GW. Rab11-FIP3 is a cell cycle-regulated phosphoprotein. BMC Cell Biol 2012; 13:4. [PMID: 22401586 PMCID: PMC3310825 DOI: 10.1186/1471-2121-13-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2011] [Accepted: 03/08/2012] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Rab11 and its effector molecule, Rab11-FIP3 (FIP3), associate with recycling endosomes and traffic into the furrow and midbody of cells during cytokinesis. FIP3 also controls recycling endosome distribution during interphase. Here, we examine whether phosphorylation of FIP3 is involved in these activities. RESULTS We identify four sites of phosphorylation of FIP3 in vivo, S-102, S-280, S-347 and S-450 and identify S-102 as a target for Cdk1-cyclin B in vitro. Of these, we show that S-102 is phosphorylated in metaphase and is dephosphorylated as cells enter telophase. Over-expression of FIP3-S102D increased the frequency of binucleate cells consistent with a role for this phospho-acceptor site in cytokinesis. Mutation of S-280, S-347 or S-450 or other previously identified phospho-acceptor sites (S-488, S-538, S-647 and S-648) was without effect on binucleate cell formation and did not modulate the distribution of FIP3 during the cell cycle. In an attempt to identify a functional role for FIP3 phosphorylation, we report that the change in FIP3 distribution from cytosolic to membrane-associated observed during progression from anaphase to telophase is accompanied by a concomitant dephosphorylation of FIP3. However, the phospho-acceptor sites identified here did not control this change in distribution. CONCLUSIONS Our data thus identify FIP3 as a cell cycle regulated phosphoprotein and suggest dephosphorylation of FIP3 accompanies its translocation from the cytosol to membranes during telophase. S102 is dephosphorylated during telophase; mutation of S102 exerts a modest effect on cytokinesis. Finally, we show that de/phosphorylation of the phospho-acceptor sites identified here (S-102, S-280, S-347 and S-450) is not required for the spatial control of recycling endosome distribution or function.
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Affiliation(s)
- Louise L Collins
- Henry Wellcome Laboratory of Cell Biology, Institute of Molecular, Cell and Systems Biology, College of Medical, Veterinary and Life Sciences, Davidson Building, University of Glasgow, Glasgow G12 8QQ, Scotland, UK
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33
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Horgan CP, Hanscom SR, Kelly EE, McCaffrey MW. Tumor susceptibility gene 101 (TSG101) is a novel binding-partner for the class II Rab11-FIPs. PLoS One 2012; 7:e32030. [PMID: 22348143 PMCID: PMC3279423 DOI: 10.1371/journal.pone.0032030] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2011] [Accepted: 01/18/2012] [Indexed: 12/21/2022] Open
Abstract
The Rab11-FIPs (Rab11-family interacting proteins; henceforth, FIPs) are a family of Rab11a/Rab11b/Rab25 GTPase effector proteins implicated in an assortment of intracellular trafficking processes. Through proteomic screening, we have identified TSG101 (tumor susceptibility gene 101), a component of the ESCRT-I (endosomal sorting complex required for transport) complex, as a novel FIP4-binding protein, which we find can also bind FIP3. We show that α-helical coiled-coil regions of both TSG101 and FIP4 mediate the interaction with the cognate protein, and that point mutations in the coiled-coil regions of both TSG101 and FIP4 abrogate the interaction. We find that expression of TSG101 and FIP4 mutants cause cytokinesis defects, but that the TSG101-FIP4 interaction is not required for localisation of TSG101 to the midbody/Flemming body during abscission. Together, these data suggest functional overlap between Rab11-controlled processes and components of the ESCRT pathway.
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Affiliation(s)
- Conor P. Horgan
- Molecular Cell Biology Laboratory, Department of Biochemistry, BioSciences Institute, University College Cork, Cork, Ireland
| | - Sara R. Hanscom
- Molecular Cell Biology Laboratory, Department of Biochemistry, BioSciences Institute, University College Cork, Cork, Ireland
| | - Eoin E. Kelly
- Molecular Cell Biology Laboratory, Department of Biochemistry, BioSciences Institute, University College Cork, Cork, Ireland
| | - Mary W. McCaffrey
- Molecular Cell Biology Laboratory, Department of Biochemistry, BioSciences Institute, University College Cork, Cork, Ireland
- * E-mail:
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Takahashi S, Takei T, Koga H, Takatsu H, Shin HW, Nakayama K. Distinct roles of Rab11 and Arf6 in the regulation of Rab11-FIP3/arfophilin-1 localization in mitotic cells. Genes Cells 2011; 16:938-50. [PMID: 21790911 DOI: 10.1111/j.1365-2443.2011.01538.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Rab11 family interacting protein 3/arfophilin-1 is a dual effector of Rab11 and Arf6 and exhibits Rab11-dependent localization to recycling endosomes in interphase. Furthermore, FIP3 undergoes dynamic redistribution to the intercellular bridge during cytokinesis. However, regulation of FIP3 redistribution and its local function by Rab11 and Arf6 has remained controversial. In this study, we developed a procedure for detecting endogenous FIP3, Arf6, and Rab11 and determined that FIP3 is localized near the intercellular bridge during cytokinesis, and to the Flemming body (the midbody) immediately before abscission; Rab11 is localized near the intercellular bridge, but not to the Flemming body; and Arf6 is localized to the Flemming body. Time-lapse analyses showed that FIP3 is transported to the intercellular bridge during cytokinesis, together with Rab11; before abscission, FIP3 becomes localized to the Flemming body, where Arf6 is already present. After abscission, FIP3 and Arf6 are incorporated into one of the daughter cells as a Flemming body remnant. Based on these observations, we propose that FIP3 localization to recycling endosomes in interphase and their transport to the intercellular bridge during cytokinesis depend on Rab11, and targeting of FIP3-positive endosomal vesicles to the Flemming body in the abscission phase depends on Arf6.
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Affiliation(s)
- Senye Takahashi
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Japan
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35
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Momose F, Sekimoto T, Ohkura T, Jo S, Kawaguchi A, Nagata K, Morikawa Y. Apical transport of influenza A virus ribonucleoprotein requires Rab11-positive recycling endosome. PLoS One 2011; 6:e21123. [PMID: 21731653 PMCID: PMC3120830 DOI: 10.1371/journal.pone.0021123] [Citation(s) in RCA: 97] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2011] [Accepted: 05/19/2011] [Indexed: 12/31/2022] Open
Abstract
Influenza A virus RNA genome exists as eight-segmented ribonucleoprotein complexes containing viral RNA polymerase and nucleoprotein (vRNPs). Packaging of vRNPs and virus budding take place at the apical plasma membrane (APM). However, little is known about the molecular mechanisms of apical transport of newly synthesized vRNP. Transfection of fluorescent-labeled antibody and subsequent live cell imaging revealed that punctate vRNP signals moved along microtubules rapidly but intermittently in both directions, suggestive of vesicle trafficking. Using a series of Rab family protein, we demonstrated that progeny vRNP localized to recycling endosome (RE) in an active/GTP-bound Rab11-dependent manner. The vRNP interacted with Rab11 through viral RNA polymerase. The localization of vRNP to RE and subsequent accumulation to the APM were impaired by overexpression of Rab binding domains (RBD) of Rab11 family interacting proteins (Rab11-FIPs). Similarly, no APM accumulation was observed by overexpression of class II Rab11-FIP mutants lacking RBD. These results suggest that the progeny vRNP makes use of Rab11-dependent RE machinery for APM trafficking.
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Affiliation(s)
- Fumitaka Momose
- Kitasato Institute for Life Sciences, Kitasato University, Tokyo, Japan.
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36
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Dynein LIC1 localizes to the mitotic spindle and midbody and LIC2 localizes to spindle poles during cell division. Cell Biol Int 2011; 35:171-8. [DOI: 10.1042/cbi20100284] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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37
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Jing J, Junutula JR, Wu C, Burden J, Matern H, Peden AA, Prekeris R. FIP1/RCP binding to Golgin-97 regulates retrograde transport from recycling endosomes to the trans-Golgi network. Mol Biol Cell 2010; 21:3041-53. [PMID: 20610657 PMCID: PMC2929997 DOI: 10.1091/mbc.e10-04-0313] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2010] [Revised: 06/18/2010] [Accepted: 06/28/2010] [Indexed: 11/22/2022] Open
Abstract
Many proteins are retrieved to the trans-Golgi Network (TGN) from the endosomal system through several retrograde transport pathways to maintain the composition and function of the TGN. However, the molecular mechanisms involved in these distinct retrograde pathways remain to be fully understood. Here we have used fluorescence and electron microscopy as well as various functional transport assays to show that Rab11a/b and its binding protein FIP1/RCP are both required for the retrograde delivery of TGN38 and Shiga toxin from early/recycling endosomes to the TGN, but not for the retrieval of mannose-6-phosphate receptor from late endosomes. Furthermore, by proteomic analysis we identified Golgin-97 as a FIP1/RCP-binding protein. The FIP1/RCP-binding domain maps to the C-terminus of Golgin-97, adjacent to its GRIP domain. Binding of FIP1/RCP to Golgin-97 does not affect Golgin-97 recruitment to the TGN, but appears to regulate the targeting of retrograde transport vesicles to the TGN. Thus, we propose that FIP1/RCP binding to Golgin-97 is required for tethering and fusion of recycling endosome-derived retrograde transport vesicles to the TGN.
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Affiliation(s)
- Jian Jing
- *Department of Cell and Developmental Biology, School of Medicine, University of Colorado Denver, Aurora, CO 80045
| | | | - Christine Wu
- Department of Pharmacology, School of Medicine, University of Colorado Denver, Aurora, CO 80045
| | - Jemima Burden
- MRC Cell Biology Unit, University College London, London, WC1E 6BT, United Kingdom
| | - Hugo Matern
- Exelixis Inc., South San Francisco, CA 94080; and
| | - Andrew A. Peden
- University of Cambridge, Cambridge Institute for Medical Research, Hills Road, CB20XY, United Kingdom
| | - Rytis Prekeris
- *Department of Cell and Developmental Biology, School of Medicine, University of Colorado Denver, Aurora, CO 80045
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Gardner LA, Hajjhussein H, Frederick-Dyer KC, Bahouth SW. Rab11a and its binding partners regulate the recycling of the ß1-adrenergic receptor. Cell Signal 2010; 23:46-57. [PMID: 20727405 DOI: 10.1016/j.cellsig.2010.07.020] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2010] [Revised: 07/27/2010] [Accepted: 07/30/2010] [Indexed: 01/12/2023]
Abstract
ß1-adrenergic receptors (ß1-AR) are internalized in response to agonists and then recycle back for another round of signaling. The serine 312 to alanine mutant of the ß1-AR (S312A) is internalized but does not recycle. We determined that WT ß1-AR and S312A were internalized initially to an early sorting compartment because they colocalized by >70% with the early endosomal markers rab5a and early endosomal antigen-1 (EEA1). Subsequently, the WT ß1-AR trafficked via rab4a-expressing sorting endosomes to recycling endosomes. In recycling endosomes WT ß1-AR were colocalized by >70% with the rab11 GTPase. S312A did not colocalize with either rab4a or rab11, instead they exited from early endosomes to late endosomes/lysosomes in which they were degraded. Rab11a played a prominent role in recycling of the WT ß1-AR because dominant negative rab11a inhibited, while constitutively active rab11a accelerated the recycling of the ß1-AR. Next, we determined the effect of each of the rab11-interacting proteins on trafficking of the WT ß1-AR. The recycling of the ß1-AR was markedly inhibited when myosin Vb, FIP2, FIP3 and rabphillin were knocked down. These data indicate that rab11a and a select group of its binding partners play a prominent role in recycling of the human ß1-AR.
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Affiliation(s)
- Lidia A Gardner
- Department of Neurology, University of Tennessee Health Sciences Center, Memphis, TN 38163, USA
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39
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Reid HM, Mulvaney EP, Turner EC, Kinsella BT. Interaction of the human prostacyclin receptor with Rab11: characterization of a novel Rab11 binding domain within alpha-helix 8 that is regulated by palmitoylation. J Biol Chem 2010; 285:18709-26. [PMID: 20395296 PMCID: PMC2881795 DOI: 10.1074/jbc.m110.106476] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2010] [Revised: 04/14/2010] [Indexed: 11/06/2022] Open
Abstract
The human prostacyclin receptor (hIP) undergoes agonist-induced internalization and subsequent recyclization in slowly recycling endosomes involving its direct physical interaction with Rab11a. Moreover, interaction with Rab11a localizes to a 22-residue putative Rab11 binding domain (RBD) within the carboxyl-terminal tail of the hIP, proximal to the transmembrane 7 (TM7) domain. Because the proposed RBD contains Cys(308) and Cys(311), in addition to Cys(309), that are known to undergo palmitoylation, we sought to identify the structure/function determinants of the RBD, including the influence of palmitoylation, on agonist-induced trafficking of the hIP. Through complementary approaches in yeast and mammalian cells along with computational structural studies, the RBD was localized to a 14-residue domain, between Val(299) and Leu(312), and proposed to be organized into an eighth alpha-helical domain (alpha-helix 8), comprising Val(299)-Val(307), adjacent to the palmitoylated residues at Cys(308)-Cys(311). From mutational and [(3)H]palmitate metabolic labeling studies, it is proposed that palmitoylation at Cys(311) in addition to agonist-regulated deacylation at Cys(309) > Cys(308) may dynamically position alpha-helix 8 in proximity to Rab11a, to regulate agonist-induced intracellular trafficking of the hIP. Moreover, Ala-scanning mutagenesis identified several hydrophobic residues within alpha-helix 8 as necessary for the interaction with Rab11a. Given the diverse membership of the G protein-coupled receptor superfamily, of which many members are also predicted to contain an alpha-helical 8 domain proximal to TM7 and, often, adjacent to palmitoylable cysteine(s), the identification of a functional role for alpha-helix 8, as exemplified as an RBD for the hIP, is likely to have broader significance for certain members of the superfamily.
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Affiliation(s)
- Helen M. Reid
- From the School of Biomolecular and Biomedical Sciences, Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland
| | - Eamon P. Mulvaney
- From the School of Biomolecular and Biomedical Sciences, Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland
| | - Elizebeth C. Turner
- From the School of Biomolecular and Biomedical Sciences, Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland
| | - B. Therese Kinsella
- From the School of Biomolecular and Biomedical Sciences, Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland
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40
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Rab11-FIP3 binds dynein light intermediate chain 2 and its overexpression fragments the Golgi complex. Biochem Biophys Res Commun 2010; 394:387-92. [DOI: 10.1016/j.bbrc.2010.03.028] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2010] [Accepted: 03/04/2010] [Indexed: 01/06/2023]
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Abstract
Influenza A virus buds through the apical plasma membrane, forming enveloped virus particles that can take the shape of pleomorphic spheres or vastly elongated filaments. For either type of virion, the factors responsible for separation of viral and cell membranes are not known. We find that cellular Rab11 (a small GTP-binding protein involved in endocytic recycling) and Rab11-family interacting protein 3 ([FIP3] which plays a role in membrane trafficking and regulation of actin dynamics) are both required to support the formation of filamentous virions, while Rab11 is additionally involved in the final budding step of spherical particles. Cells transfected with Rab11 GTP-cycling mutants or depleted of Rab11 or FIP3 content by small interfering RNA treatment lost the ability to form virus filaments. Depletion of Rab11 resulted in up to a 100-fold decrease in titer of spherical virus released from cells. Scanning electron microscopy of Rab11-depleted cells showed high densities of virus particles apparently stalled in the process of budding. Transmission electron microscopy of thin sections confirmed that Rab11 depletion resulted in significant numbers of abnormally formed virus particles that had failed to pinch off from the plasma membrane. Based on these findings, we see a clear role for a Rab11-mediated pathway in influenza virus morphogenesis and budding.
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42
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Krzyzaniak MA, Mach M, Britt WJ. HCMV-encoded glycoprotein M (UL100) interacts with Rab11 effector protein FIP4. Traffic 2010; 10:1439-57. [PMID: 19761540 DOI: 10.1111/j.1600-0854.2009.00967.x] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The envelope of human cytomegalovirus (HCMV) consists of a large number of glycoproteins. The most abundant glycoprotein in the HCMV envelope is the glycoprotein M (UL100), which together with glycoprotein N (UL73) form the gM/gN protein complex. Using yeast two-hybrid screening, we found that the gM carboxy-terminal cytoplasmic tail (gM-CT) interacts with FIP4, a Rab11-GTPase effector protein. Depletion of FIP4 expression in HCMV-infected cells resulted in a decrease in infectious virus production that was also associated with an alteration of the HCMV assembly compartment (AC) phenotype. A similar phenotype was also observed in HCMV-infected cells that expressed dominant negative Rab11(S25N). Recently, it has been shown that FIP4 interactions with Rab11 and additionally with Arf6/Arf5 are important for the vesicular transport of proteins in the endosomal recycling compartment (ERC) and during cytokinesis. Surprisingly, FIP4 interaction with gM-CT limited binding of FIP4 with Arf5/Arf6; however, FIP4 interaction with gM-CT did not prevent recruitment of Rab11 into the ternary complex. These data argued for a contribution of the ERC during cytoplasmic envelopment of HCMV and showed a novel FIP4 function independent of Arf5 or Arf6 activity.
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Affiliation(s)
- Magdalena A Krzyzaniak
- Department of Microbiology, University of Alabama at Birmingham, CHB160, Birmingham, AL 35233, USA
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43
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IL-7 induces rapid clathrin-mediated internalization and JAK3-dependent degradation of IL-7Ralpha in T cells. Blood 2010; 115:3269-77. [PMID: 20190194 DOI: 10.1182/blood-2009-10-246876] [Citation(s) in RCA: 95] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Interleukin-7 (IL-7) is an essential cytokine for T-cell development and homeostasis. It is well established that IL-7 promotes the transcriptional down-regulation of IL7RA, leading to decreased IL-7Ralpha surface expression. However, it is currently unknown whether IL-7 regulates the intracellular trafficking and early turnover of its receptor on ligand binding. Here, we show that, in steady-state T cells, IL-7Ralpha is slowly internalized and degraded while a significant fraction recycles back to the surface. On IL-7 stimulation, there is rapid IL-7Ralpha endocytosis via clathrin-coated pits, decreased receptor recycling, and accelerated lysosome and proteasome-dependent degradation. In accordance, the half-life of IL-7Ralpha decreases from 24 hours to approximately 3 hours after IL-7 treatment. Interestingly, we further demonstrate that clathrin-dependent endocytosis is necessary for efficient IL-7 signal transduction. In turn, pretreatment of T cells with JAK3 or pan-JAK inhibitors suggests that IL-7Ralpha degradation depends on the activation of the IL-7 signaling effector JAK3. Overall, our findings indicate that IL-7 triggers rapid IL-7Ralpha endocytosis, which is required for IL-7-mediated signaling and subsequent receptor degradation.
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44
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Horgan CP, Hanscom SR, Jolly RS, Futter CE, McCaffrey MW. Rab11-FIP3 links the Rab11 GTPase and cytoplasmic dynein to mediate transport to the endosomal-recycling compartment. J Cell Sci 2010; 123:181-91. [DOI: 10.1242/jcs.052670] [Citation(s) in RCA: 147] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Several protein families control intracellular transport processes in eukaryotic cells. Here, we show that the Rab11 GTPase effector protein Rab11-FIP3 (henceforth, FIP3) directly interacts with the dynein light intermediate chain 1 (DLIC-1, gene symbol DYNC1LI1) subunit of the cytoplasmic dynein 1 motor protein complex. We show that Rab11a, FIP3 and DLIC-1 form a ternary complex and that DLIC-1 colocalises with endogenous FIP3 and Rab11a in A431 cells. We demonstrate that association between FIP3 and DLIC-1 at the cell periphery precedes minus-end-directed microtubule-based transport, that FIP3 recruits DLIC-1 onto membranes, and that knockdown of DLIC-1 inhibits pericentrosomal accumulation of key endosomal-recycling compartment (ERC) proteins. In addition, we demonstrate that expression of a DLIC-1-binding truncation mutant of FIP3 disrupts the ability of ERC proteins to accumulate pericentrosomally. On the basis of these and other data, we propose that FIP3 links the Rab11 GTPase and cytoplasmic dynein to mediate transport of material from peripheral sorting endosomes to the centrally located ERC.
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Affiliation(s)
- Conor P. Horgan
- Molecular Cell Biology Laboratory, Department of Biochemistry, Biosciences Institute, University College Cork, Cork, Ireland
| | - Sara R. Hanscom
- Molecular Cell Biology Laboratory, Department of Biochemistry, Biosciences Institute, University College Cork, Cork, Ireland
| | - Rushee S. Jolly
- Division of Cell Biology, Institute of Ophthalmology, University College London, London EC1V 9EL, UK
| | - Clare E. Futter
- Division of Cell Biology, Institute of Ophthalmology, University College London, London EC1V 9EL, UK
| | - Mary W. McCaffrey
- Molecular Cell Biology Laboratory, Department of Biochemistry, Biosciences Institute, University College Cork, Cork, Ireland
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45
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Abstract
The Rab11-FIPs (Rab11-family interacting proteins; also known as FIPs) constitute an evolutionarily conserved protein family that act as effector molecules for multiple Rab and Arf (ADP-ribosylation factor) GTPases. They were initially characterized by their ability to bind Rab11 subfamily members via a highly-conserved C-terminal RBD (Rab11-binding domain). Resolution of the crystal structure of Rab11 in complex with FIPs revealed that the RBD mediates homodimerization of the FIP molecules, creating two symmetrical interfaces for Rab11 binding and leading to the formation of a heterotetrameric complex between two FIP and two Rab11 molecules. The FIP proteins are encoded by five genes and alternative splicing has been reported. Based on primary structure, the FIPs were subcategorized into two classes: class I [Rip11, FIP2 and RCP (Rab-coupling protein)] and class II (FIP3 and FIP4). Recent studies have identified the FIPs as key players in the regulation of multiple distinct membrane trafficking events. In this mini-review, we summarize the Rab11-FIP field and discuss, at molecular and cellular levels, the recent findings on FIP function.
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46
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Abstract
BACKGROUND INFORMATION Rab11 and Rab14 are two related Rab GTPases that are believed to function in endosomal recycling and Golgi/endosome transport processes. We, and others, have identified a group of proteins that interact with Rab11 and function as Rab11 effectors, known as the Rab11-FIPs (family interacting proteins). This protein family has been sub-classified into two groups - class I FIPs [FIP2, RCP (Rab coupling protein) and Rip11 (Rab11-interacting protein)] and class II FIPs (FIP3 and FIP4). RESULTS In the present study we identify the class I FIPs as dual Rab-binding proteins by demonstrating that they also interact with Rab14 in a GTP-dependent manner. We show that these interactions are specific for the class I FIPs and that they occur via their C-terminal regions, which encompass the previously described RBD (Rab11-binding domain). Furthermore, we show that Rab14 significantly co-localizes with the TfnR (transferrin receptor) and that Rab14 Q70L co-localizes with Rab11a and with the class I FIPs on the ERC (endosomal recycling compartment) during interphase. Additionally, we show that during cytokinesis Rab14 localizes to the cleavage furrow/midbody. CONCLUSIONS The data presented in the present study, which identifies the class I FIPs as the first putative effector proteins for the Rab14 GTPase, indicates greater complexity in the Rab-binding specificity of the class I FIP proteins.
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47
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Jing J, Prekeris R. Polarized endocytic transport: the roles of Rab11 and Rab11-FIPs in regulating cell polarity. Histol Histopathol 2009; 24:1171-80. [PMID: 19609864 DOI: 10.14670/hh-24.1171] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Endocytic transport plays a vital role in the establishment and maintenance of cell polarity. Many studies have demonstrated that endosome-dependent protein targeting is required for polarization of epithelial cells and neurons. Endocytic transport regulates several highly polarized cellular events, such as cell motility and division. Rab11 GTPase has been shown to be a master regulator of protein transport via recycling endosomes, and many recent studies have focused on the molecular machinery that mediates Rab11-dependent endocytic protein transport in polarized cells. This mini-review describes the recent advances in identifying and characterizing the role of Rab11 and its effector proteins that play important roles in polarized endocytic sorting and transport.
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Affiliation(s)
- Jian Jing
- Department of Cell and Developmental Biology, School of Medicine, University of Colorado Denver, Aurora, COA 80045 USA
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48
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Grant BD, Donaldson JG. Pathways and mechanisms of endocytic recycling. Nat Rev Mol Cell Biol 2009; 10:597-608. [PMID: 19696797 DOI: 10.1038/nrm2755] [Citation(s) in RCA: 1056] [Impact Index Per Article: 70.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Endocytic recycling is coordinated with endocytic uptake to control the composition of the plasma membrane. Although much of our understanding of endocytic recycling has come from studies on the transferrin receptor, a protein internalized through clathrin-dependent endocytosis, increased interest in clathrin-independent endocytosis has led to the discovery of new endocytic recycling systems. Recent insights into the regulatory mechanisms that control endocytic recycling have focused on recycling through tubular carriers and the return to the cell surface of cargoes that enter cells through clathrin-independent mechanisms. Recent work emphasizes the importance of regulated recycling in processes as diverse as cytokinesis, cell adhesion, morphogenesis, cell fusion, learning and memory.
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Affiliation(s)
- Barth D Grant
- Department of Molecular Biology and Biochemistry, Rutgers University, Piscataway, New Jersey 08854, USA.
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49
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Landry MC, Sicotte A, Champagne C, Lavoie JN. Regulation of cell death by recycling endosomes and golgi membrane dynamics via a pathway involving Src-family kinases, Cdc42 and Rab11a. Mol Biol Cell 2009; 20:4091-106. [PMID: 19641023 DOI: 10.1091/mbc.e09-01-0057] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Actin dynamics and membrane trafficking influence cell commitment to programmed cell death through largely undefined mechanisms. To investigate how actin and recycling endosome (RE) trafficking can engage death signaling, we studied the death program induced by the adenovirus early region 4 open reading frame 4 (E4orf4) protein as a model. We found that in the early stages of E4orf4 expression, Src-family kinases (SFKs), Cdc42, and actin perturbed the organization of the endocytic recycling compartment and promoted the transport of REs to the Golgi apparatus, while inhibiting recycling of protein cargos to the plasma membrane. The resulting changes in Golgi membrane dynamics that relied on actin-regulated Rab11a membrane trafficking triggered scattering of Golgi membranes and contributed to the progression of cell death. A similar mobilization of RE traffic mediated by SFKs, Cdc42 and Rab11a also contributed to Golgi fragmentation and to cell death progression in response to staurosporine, in a caspase-independent manner. Collectively, these novel findings suggest that diversion of RE trafficking to the Golgi complex through a pathway involving SFKs, Cdc42, and Rab11a plays a general role in death signaling by mediating regulated changes in Golgi dynamics.
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Affiliation(s)
- Marie-Claude Landry
- Centre de Recherche en Cancérologie de l'Université Laval, L'Hôtel-Dieu de Québec, Centre de Recherche du Centre Hospitalier Universitaire de Quebec, Québec G1R 2J6, Canada
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50
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Rab11-FIP3 is a Rab11-binding protein that regulates breast cancer cell motility by modulating the actin cytoskeleton. Eur J Cell Biol 2009; 88:325-41. [PMID: 19327867 DOI: 10.1016/j.ejcb.2009.02.186] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2008] [Revised: 01/29/2009] [Accepted: 02/02/2009] [Indexed: 12/19/2022] Open
Abstract
Cell adhesion and motility are very dynamic processes that require the temporal and spatial coordination of many cellular structures. ADP-ribosylation factor 6 (Arf6) has emerged as master regulator of endocytic membrane traffic and cytoskeletal dynamics during cell movement. Recently, a novel Arf6-binding protein known as FIP3/arfophilin/eferin has been identified. In addition to Arf6, FIP3 also interacts with Rab11, a small monomeric GTPase that regulates endocytic membrane transport. Both Arf6 and Rab11 GTPases have been implicated in regulation of cell motility. Here we test the role of FIP3 in breast carcinoma cell motility. First, we demonstrate that FIP3 is associated with recycling endosomes that are present at the leading edge of motile cells. Second, we show that FIP3 is required for the motility of MDA-MB-231 breast carcinoma cells. Third, we demonstrate that FIP3 regulates Rac1-dependent actin cytoskeleton dynamics and modulates the formation and ruffling of lamellipodia. Finally, we demonstrate that FIP3 regulates the localization of Arf6 at the plasma membrane of MDA-MB-231 cells. Based on our data we propose that FIP3 affects cell motility by regulating Arf6 localization to the plasma membrane of the leading edge, thus regulating polarized Rac1 activation and actin dynamics.
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