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Hua Z, Watanabe R, Fukunaga T, Matsui Y, Matsuoka M, Yamaguchi S, Tanabe SY, Yamamoto M, Tamura-Kawakami K, Takagi J, Kajita M, Futai E, Shirakabe K. C-terminal amino acids in the type I transmembrane domain of L-type lectin VIP36 affect γ-secretase susceptibility. Biochem Biophys Res Commun 2024; 696:149504. [PMID: 38219489 DOI: 10.1016/j.bbrc.2024.149504] [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: 08/17/2023] [Revised: 12/20/2023] [Accepted: 01/08/2024] [Indexed: 01/16/2024]
Abstract
Regulated intramembrane proteolysis (RIP) is a two-step processing mechanism for transmembrane proteins consisting of ectodomain shedding (shedding), which removes the extracellular domain through juxtamembrane processing and intramembrane proteolysis, which processes membrane-anchored shedding products within the transmembrane domain. RIP irreversibly converts one transmembrane protein into multiple soluble proteins that perform various physiological functions. The only requirement for the substrate of γ-secretase, the major enzyme responsible for intramembrane proteolysis of type I transmembrane proteins, is the absence of a large extracellular domain, and it is thought that γ-secretase can process any type I membrane protein as long as it is shed. In the present study, we showed that the shedding susceptible type I membrane protein VIP36 (36 kDa vesicular integral membrane protein) and its homolog, VIPL, have different γ-secretase susceptibilities in their transmembrane domains. Analysis of the substitution mutants suggested that γ-secretase susceptibility is regulated by C-terminal amino acids in the transmembrane domain. We also compared the transmembrane domains of several shedding susceptible membrane proteins and found that each had a different γ-secretase susceptibility. These results suggest that the transmembrane domain is not simply a stretch of hydrophobic amino acids but is an important element that regulates membrane protein function by controlling the lifetime of the membrane-anchored shedding product.
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Affiliation(s)
- Zhihai Hua
- Department of Biomedical Sciences, College of Life Sciences, Ritsumeikan University, Kusatsu, 525-8577, Japan
| | - Ryoma Watanabe
- Laboratory of Enzymology, Graduate School of Agricultural Sciences, Tohoku University, Sendai, Miyagi, 981-8572, Japan
| | - Taku Fukunaga
- Department of Biomedical Sciences, College of Life Sciences, Ritsumeikan University, Kusatsu, 525-8577, Japan
| | - Yojiro Matsui
- Department of Biomedical Sciences, College of Life Sciences, Ritsumeikan University, Kusatsu, 525-8577, Japan
| | - Mayu Matsuoka
- Department of Biomedical Sciences, College of Life Sciences, Ritsumeikan University, Kusatsu, 525-8577, Japan
| | - Shoya Yamaguchi
- Laboratory of Enzymology, Graduate School of Agricultural Sciences, Tohoku University, Sendai, Miyagi, 981-8572, Japan
| | - Shun-Ya Tanabe
- Department of Biomedical Sciences, College of Life Sciences, Ritsumeikan University, Kusatsu, 525-8577, Japan
| | - Miyu Yamamoto
- Department of Biomedical Sciences, College of Life Sciences, Ritsumeikan University, Kusatsu, 525-8577, Japan
| | - Keiko Tamura-Kawakami
- Laboratory of Protein Synthesis and Expression, Institute for Protein Research, Osaka University, Osaka, 565-0871, Japan
| | - Junichi Takagi
- Laboratory of Protein Synthesis and Expression, Institute for Protein Research, Osaka University, Osaka, 565-0871, Japan
| | - Mihoko Kajita
- Department of Biomedical Sciences, College of Life Sciences, Ritsumeikan University, Kusatsu, 525-8577, Japan
| | - Eugene Futai
- Laboratory of Enzymology, Graduate School of Agricultural Sciences, Tohoku University, Sendai, Miyagi, 981-8572, Japan
| | - Kyoko Shirakabe
- Department of Biomedical Sciences, College of Life Sciences, Ritsumeikan University, Kusatsu, 525-8577, Japan; Ritsumeikan Global Innovation Research Institute, Ritsumeikan University, Kusatsu, 525-8577, Japan.
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Iwagishi R, Tanaka R, Seto M, Takagi T, Norioka N, Ueyama T, Kawamura T, Takagi J, Ogawa Y, Shirakabe K. Negatively charged amino acids in the stalk region of membrane proteins reduce ectodomain shedding. J Biol Chem 2020; 295:12343-12352. [PMID: 32580944 DOI: 10.1074/jbc.ra120.013758] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 06/11/2020] [Indexed: 01/12/2023] Open
Abstract
Ectodomain shedding is a post-translational modification mechanism by which the entire extracellular domain of membrane proteins is liberated through juxtamembrane processing. Because shedding rapidly and irreversibly alters the characteristics of cells, this process is properly regulated. However, the molecular mechanisms governing the propensity of membrane proteins to shedding are largely unknown. Here, we present evidence that negatively charged amino acids within the stalk region, an unstructured juxtamembrane region at which shedding occurs, contribute to shedding susceptibility. We show that two activated leukocyte cell adhesion molecule (ALCAM) protein variants produced by alternative splicing have different susceptibilities to ADAM metallopeptidase domain 17 (ADAM17)-mediated shedding. Of note, the inclusion of a stalk region encoded by a 39-bp-long alternative exon conferred shedding resistance. We found that this alternative exon encodes a large proportion of negatively charged amino acids, which we demonstrate are indispensable for conferring the shedding resistance. We also show that the introduction of negatively charged amino acids into the stalk region of shedding-susceptible ALCAM variant protein attenuates its shedding. Furthermore, we observed that negatively charged amino acids residing in the stalk region of Erb-B2 receptor tyrosine kinase 4 (ERBB4) are indispensable for its shedding resistance. Collectively, our results indicate that negatively charged amino acids within the stalk region interfere with the shedding of multiple membrane proteins. We conclude that the composition of the stalk region determines the shedding susceptibility of membrane proteins.
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Affiliation(s)
- Ryo Iwagishi
- Department of Biomedical Sciences, College of Life Sciences, Ritsumeikan University, Kusatsu, Japan
| | - Rika Tanaka
- Department of Biomedical Sciences, College of Life Sciences, Ritsumeikan University, Kusatsu, Japan
| | - Munenosuke Seto
- Department of Biomedical Sciences, College of Life Sciences, Ritsumeikan University, Kusatsu, Japan
| | - Tomoyo Takagi
- Department of Biomedical Sciences, College of Life Sciences, Ritsumeikan University, Kusatsu, Japan
| | - Naoko Norioka
- Laboratory of Protein Synthesis and Expression, Institute for Protein Research, Osaka University, Osaka, Japan
| | - Tomoe Ueyama
- Department of Biomedical Sciences, College of Life Sciences, Ritsumeikan University, Kusatsu, Japan.,Ritsumeikan Global Innovation Research Organization, Ritsumeikan University, Kusatsu, Japan
| | - Teruhisa Kawamura
- Department of Biomedical Sciences, College of Life Sciences, Ritsumeikan University, Kusatsu, Japan.,Ritsumeikan Global Innovation Research Organization, Ritsumeikan University, Kusatsu, Japan
| | - Junichi Takagi
- Laboratory of Protein Synthesis and Expression, Institute for Protein Research, Osaka University, Osaka, Japan
| | - Yoshihiro Ogawa
- Department of Molecular and Cellular Metabolism, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.,Department of Medical and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.,Japan Agency for Medical Research and Development (AMED), Core Research for Evolutional Science and Technology (CREST), Tokyo, Japan
| | - Kyoko Shirakabe
- Department of Biomedical Sciences, College of Life Sciences, Ritsumeikan University, Kusatsu, Japan .,Ritsumeikan Global Innovation Research Organization, Ritsumeikan University, Kusatsu, Japan.,Department of Molecular and Cellular Metabolism, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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Niedermaier S, Huesgen PF. Positional proteomics for identification of secreted proteoforms released by site-specific processing of membrane proteins. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2019; 1867:140138. [DOI: 10.1016/j.bbapap.2018.09.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Revised: 08/31/2018] [Accepted: 09/13/2018] [Indexed: 02/06/2023]
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Mechanistic insights into ectodomain shedding: susceptibility of CADM1 adhesion molecule is determined by alternative splicing and O-glycosylation. Sci Rep 2017; 7:46174. [PMID: 28393893 PMCID: PMC5385562 DOI: 10.1038/srep46174] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Accepted: 03/10/2017] [Indexed: 12/24/2022] Open
Abstract
Ectodomain shedding (shedding) is a post-translational modification, which liberates the extracellular domain of membrane proteins through juxtamembrane processing executed mainly by the ADAM (a disintegrin and metalloprotease) family of metalloproteases. Because shedding alters characteristics of cells in a rapid and irreversible manner, it should be strictly regulated. However, the molecular mechanisms determining membrane protein susceptibility to shedding (shedding susceptibility) are largely unknown. Here we report that alternative splicing can give rise to both shedding-susceptible and shedding-resistant CADM1 (cell adhesion molecule 1) variant proteins. We further show that O-glycans adjacent to the shedding cleavage site interfere with CADM1 shedding, and the only 33-bp alternative exon confers shedding susceptibility to CADM1 by inserting five non-glycosylatable amino acids between interfering O-glycans and the shedding cleavage site. These results demonstrate that shedding susceptibility of membrane protein can be determined at two different levels of its biosynthesis pathway, alternative splicing and O-glycosylation.
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Müller SA, Scilabra SD, Lichtenthaler SF. Proteomic Substrate Identification for Membrane Proteases in the Brain. Front Mol Neurosci 2016; 9:96. [PMID: 27790089 PMCID: PMC5062031 DOI: 10.3389/fnmol.2016.00096] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Accepted: 09/21/2016] [Indexed: 12/26/2022] Open
Abstract
Cell-cell communication in the brain is controlled by multiple mechanisms, including proteolysis. Membrane-bound proteases generate signaling molecules from membrane-bound precursor proteins and control the length and function of cell surface membrane proteins. These proteases belong to different families, including members of the “a disintegrin and metalloprotease” (ADAM), the beta-site amyloid precursor protein cleaving enzymes (BACE), membrane-type matrix metalloproteases (MT-MMP) and rhomboids. Some of these proteases, in particular ADAM10 and BACE1 have been shown to be essential not only for the correct development of the mammalian brain, but also for myelination and maintaining neuronal connections in the adult nervous system. Additionally, these proteases are considered as drug targets for brain diseases, including Alzheimer’s disease (AD), schizophrenia and cancer. Despite their biomedical relevance, the molecular functions of these proteases in the brain have not been explored in much detail, as little was known about their substrates. This has changed with the recent development of novel proteomic methods which allow to identify substrates of membrane-bound proteases from cultured cells, primary neurons and other primary brain cells and even in vivo from minute amounts of mouse cerebrospinal fluid (CSF). This review summarizes the recent advances and highlights the strengths of the individual proteomic methods. Finally, using the example of the Alzheimer-related proteases BACE1, ADAM10 and γ-secretase, as well as ADAM17 and signal peptide peptidase like 3 (SPPL3), we illustrate how substrate identification with novel methods is instrumental in elucidating broad physiological functions of these proteases in the brain and other organs.
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Affiliation(s)
- Stephan A Müller
- German Center for Neurodegenerative Diseases (DZNE)Munich, Germany; Neuroproteomics, Klinikum rechts der Isar, Technische Universität MünchenMunich, Germany
| | - Simone D Scilabra
- German Center for Neurodegenerative Diseases (DZNE)Munich, Germany; Neuroproteomics, Klinikum rechts der Isar, Technische Universität MünchenMunich, Germany
| | - Stefan F Lichtenthaler
- German Center for Neurodegenerative Diseases (DZNE)Munich, Germany; Neuroproteomics, Klinikum rechts der Isar, Technische Universität MünchenMunich, Germany; Institute for Advanced Study, Technische Universität MunichGarching, Germany; Munich Cluster for Systems Neurology (SyNergy)Munich, Germany
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Jarocki VM, Tacchi JL, Djordjevic SP. Non-proteolytic functions of microbial proteases increase pathological complexity. Proteomics 2015; 15:1075-88. [PMID: 25492846 PMCID: PMC7167786 DOI: 10.1002/pmic.201400386] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Revised: 10/26/2014] [Accepted: 12/05/2014] [Indexed: 12/26/2022]
Abstract
Proteases are enzymes that catalyse hydrolysis of peptide bonds thereby controlling the shape, size, function, composition, turnover and degradation of other proteins. In microbes, proteases are often identified as important virulence factors and as such have been targets for novel drug design. It is emerging that some proteases possess additional non‐proteolytic functions that play important roles in host epithelia adhesion, tissue invasion and in modulating immune responses. These additional “moonlighting” functions have the potential to obfuscate data interpretation and have implications for therapeutic design. Moonlighting enzymes comprise a subcategory of multifunctional proteins that possess at least two distinct biological functions on a single polypeptide chain. Presently, identifying moonlighting proteins relies heavily on serendipitous empirical data with clues arising from proteins lacking signal peptides that are localised to the cell surface. Here, we describe examples of microbial proteases with additional non‐proteolytic functions, including streptococcal pyrogenic exotoxin B, PepO and C5a peptidases, mycoplasmal aminopeptidases, mycobacterial chaperones and viral papain‐like proteases. We explore how these non‐proteolytic functions contribute to host cell adhesion, modulate the coagulation pathway, assist in non‐covalent folding of proteins, participate in cell signalling, and increase substrate repertoire. We conclude by describing how proteomics has aided in moonlighting protein discovery, focusing attention on potential moonlighters in microbial exoproteomes.
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Affiliation(s)
- Veronica M. Jarocki
- The ithree instituteProteomics Core Facility, University of TechnologySydneyNSWAustralia
| | - Jessica L. Tacchi
- The ithree instituteProteomics Core Facility, University of TechnologySydneyNSWAustralia
| | - Steven P. Djordjevic
- The ithree instituteProteomics Core Facility, University of TechnologySydneyNSWAustralia
- Proteomics Core FacilityUniversity of TechnologySydneyNSWAustralia
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