keyword
MENU ▼
Read by QxMD icon Read
search

Septin

keyword
https://www.readbyqxmd.com/read/28224124/the-mammalian-septin-interactome
#1
REVIEW
Katharina Neubauer, Barbara Zieger
Septins are GTP-binding and membrane-interacting proteins with a highly conserved domain structure involved in various cellular processes, including cytoskeleton organization, cytokinesis, and membrane dynamics. To date, 13 different septin genes have been identified in mammals (SEPT1 to SEPT12 and SEPT14), which can be classified into four distinct subgroups based on the sequence homology of their domain structure (SEPT2, SEPT3, SEPT6, and SEPT7 subgroup). The family members of these subgroups have a strong affinity for other septins and form apolar tri-, hexa-, or octameric complexes consisting of multiple septin polypeptides...
2017: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/28188860/genetic-incorporation-of-n-%C3%AE%C2%B5-acetyllysine-reveals-a-novel-acetylation-sumoylation-switch-in-yeast
#2
Sang-Woo Kim, Kyung Jin Lee, Sinil Kim, Jihyo Kim, Kyukwang Cho, Hyeon-Su Ro, Hee-Sung Park
The lysine acetylation of proteins plays a key role in regulating protein functions, thereby controlling a wide range of cellular processes. Despite the prevalence and significance of lysine acetylation in eukaryotes, however, its systematic study has been challenged by the technical limitations of conventional approaches for selective lysine acetylation in vivo. Here, we report the in vivo study of lysine acetylation via the genetic incorporation of N(ε)-acetyllysine in yeast. We demonstrate that a newly discovered acetylation-sumoylation switch precisely controls the localization and cellular function of the yeast septin protein, Cdc11, during the cell cycle...
February 7, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28148650/the-septin-associated-kinase-gin4-recruits-gps1-to-the-site-of-cell-division
#3
Franz Meitinger, Gislene Pereira
Cell cycle dependent morphogenesis of unicellular organisms depends on the spatio-temporal control of cell polarity. Rho GTPases are the major players that guide cells through structural reorganizations such as cytokinesis (Rho1-dependent) and polarity establishment (Cdc42-dependent). In budding yeast, the protein Gps1 plays a pivotal role in both processes. Gps1 resides at the bud-neck to maintain Rho1 localization and restrict Cdc42 activity during cytokinesis. Here, we analyzed how Gps1 is recruited to the bud-neck during the cell cycle...
February 1, 2017: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/28147230/multimodal-and-polymorphic-interactions-between-anillin-and-actin-their-implications-for-cytokinesis
#4
Silvana Jananji, Cristina Risi, Indeewari K S Lindamulage, Louis-Philippe Picard, Robert Van Sciver, Guillaume Laflamme, Abe Albaghjati, Gilles R X Hickson, Benjamin H Kwok, Vitold E Galkin
Cytokinesis of animal cells requires the assembly of a contractile ring, which promotes daughter cell splitting. Anillin is a conserved scaffold protein involved in organizing the structural components of the contractile ring including filamentous actin (F-actin), myosin, and septins and in forming the subsequent midbody ring. Like other metazoan homologs, Drosophila anillin contains a conserved domain that can bind and bundle F-actin, but the importance and molecular details of its interaction with F-actin remain unclear...
January 29, 2017: Journal of Molecular Biology
https://www.readbyqxmd.com/read/28064039/roles-of-an-n-terminal-coiled-coil-containing-domain-in-the-localization-and-function-of-bem3-a-rho-gtpase-activating-protein-in-budding-yeast
#5
Wen-Chao Nie, Fei He, Si-Min Yuan, Zhi-Wen Jia, Rui-Rui Wang, Xiang-Dong Gao
GTPase-activating proteins (GAPs) play critical roles in the spatial and temporal control of small GTPases. The budding yeast Bem3 is a GAP for Cdc42, a Rho GTPase crucial for actin and septin organization. Bem3 localizes to the sites of polarized growth. However, the amino acid sequence determinants mediating recruitment of Bem3 to its physiological sites of action and those important for Bem3 function are not clear. Here, we show that Bem3's localization is guided by two distinct targeting regions-the PX-PH-domain-containing TD1 and the coiled-coil-containing TD2...
January 4, 2017: Fungal Genetics and Biology: FG & B
https://www.readbyqxmd.com/read/28056033/fiji-macro-3d-art-veselect-3d-automated-reconstruction-tool-for-vesicle-structures-of-electron-tomograms
#6
Kristin Verena Kaltdorf, Katja Schulze, Frederik Helmprobst, Philip Kollmannsberger, Thomas Dandekar, Christian Stigloher
Automatic image reconstruction is critical to cope with steadily increasing data from advanced microscopy. We describe here the Fiji macro 3D ART VeSElecT which we developed to study synaptic vesicles in electron tomograms. We apply this tool to quantify vesicle properties (i) in embryonic Danio rerio 4 and 8 days past fertilization (dpf) and (ii) to compare Caenorhabditis elegans N2 neuromuscular junctions (NMJ) wild-type and its septin mutant (unc-59(e261)). We demonstrate development-specific and mutant-specific changes in synaptic vesicle pools in both models...
January 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28035516/circadian-rhythm-of-methylated-septin-9-cell-free-dna-amount-and-tumor-markers-in-colorectal-cancer-patients
#7
Kinga Tóth, Árpád V Patai, Alexandra Kalmár, Barbara Kinga Barták, Zsófia Brigitta Nagy, Orsolya Galamb, Barnabás Wichmann, Zsolt Tulassay, Béla Molnár
To determine the level of cell-free DNA (cfDNA), Septin 9 (SEPT9) and tumor markers (CEA, AFP, CA19-9, TPA, CA72-4). Plasma samples were collected four times a day (06:00, 12:00, 18:00, 24:00) from 9 patients with CRC (5 stage I-II, 4 stage III-IV), from one with colorectal adenoma and from one healthy control. CfDNA was isolated, quantified and bisulfite-converted. CfDNA and methylated SEPT9 were determined by RT-PCR. Plasma levels of conventional tumor markers were also measured. The lowest cfDNA concentrations were observed at 24:00 and 18:00 in stage I-III patients...
December 30, 2016: Pathology Oncology Research: POR
https://www.readbyqxmd.com/read/28028881/the-microtubule-end-binding-protein-fgeb1-regulates-polar-growth-and-fungicide-sensitivity-via-different-interactors-in-fusarium-graminearum
#8
Zunyong Liu, Sisi Wu, Yun Chen, Xinyue Han, Qin Gu, Yanni Yin, Zhonghua Ma
In yeasts, the end-binding protein 1 (EB1) homologs regulate microtubule dynamics, cell polarization, and chromosome stability. However, functions of EB1 orthologs in plant pathogenic fungi have not been characterized yet. Here, we observed that the FgEB1 deletion mutant (ΔFgEB1) of Fusarium graminearum exhibits twisted hyphae, increased hyphal branching and curved conidia, indicating that FgEB1 is involved in the regulation of cellular polarity. Microscopic examination further showed that the microtubules of ΔFgEB1 exhibited less organized in comparison with those of the wild type...
December 28, 2016: Environmental Microbiology
https://www.readbyqxmd.com/read/28028232/two-independent-s-phase-checkpoints-regulate-appressorium-mediated-plant-infection-by-the-rice-blast-fungus-magnaporthe-oryzae
#9
Míriam Osés-Ruiz, Wasin Sakulkoo, George R Littlejohn, Magdalena Martin-Urdiroz, Nicholas J Talbot
To cause rice blast disease, the fungal pathogen Magnaporthe oryzae develops a specialized infection structure called an appressorium. This dome-shaped, melanin-pigmented cell generates enormous turgor and applies physical force to rupture the rice leaf cuticle using a rigid penetration peg. Appressorium-mediated infection requires septin-dependent reorientation of the F-actin cytoskeleton at the base of the infection cell, which organizes polarity determinants necessary for plant cell invasion. Here, we show that plant infection by M...
January 10, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28018901/regulation-of-store-operated-ca-2-entry-by-septins
#10
Bipan K Deb, Gaiti Hasan
The mechanism of store-operated Ca(2+) entry (SOCE) brings extracellular Ca(2+) into cells after depletion of intracellular Ca(2+) stores. Regulation of Ca(2+) homeostasis by SOCE helps control various intracellular signaling functions in both non-excitable and excitable cells. Whereas essential components of the SOCE pathway are well characterized, molecular mechanisms underlying regulation of this pathway need investigation. A class of proteins recently demonstrated as regulating SOCE is septins. These are filament-forming GTPases that assemble into higher order structures...
2016: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/28011197/septin-7-reduces-nonmuscle-myosin-iia-activity-in-the-snap23-complex-and-hinders-glut4-storage-vesicle-docking-and-fusion
#11
Anita A Wasik, Vincent Dumont, Jukka Tienari, Tuula A Nyman, Christopher L Fogarty, Carol Forsblom, Markku Lehto, Eero Lehtonen, Per-Henrik Groop, Sanna Lehtonen
Glomerular epithelial cells, podocytes, are insulin responsive and can develop insulin resistance. Here, we demonstrate that the small GTPase septin 7 forms a complex with nonmuscle myosin heavy chain IIA (NMHC-IIA; encoded by MYH9), a component of the nonmuscle myosin IIA (NM-IIA) hexameric complex. We observed that knockdown of NMHC-IIA decreases insulin-stimulated glucose uptake into podocytes. Both septin 7 and NM-IIA associate with SNAP23, a SNARE protein involved in GLUT4 storage vesicle (GSV) docking and fusion with the plasma membrane...
January 15, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28002737/heterotypic-coiled-coil-formation-is-essential-for-the-correct-assembly-of-the-septin-heterofilament
#12
Fernanda A Sala, Napoleão F Valadares, Joci N A Macedo, Julio C Borges, Richard C Garratt
Protein-protein interactions play a critical role in promoting the stability of protein quaternary structure and in the assembly of large macromolecular complexes. What drives the stabilization of such assemblies is a central question in biology. A limiting factor in fully understanding such systems is the transient nature of many complexes, making structural studies difficult. Septins comprise a conserved family of guanine nucleotide binding proteins that polymerize in the form of heterofilaments. In structural terms, they have a common organization: a central GTPase domain, an N-terminal domain, and a C-terminal domain; the latter is predicted to form a coiled coil...
December 20, 2016: Biophysical Journal
https://www.readbyqxmd.com/read/27990280/hyphal-ontogeny-in-neurospora-crassa-a-model-organism-for-all-seasons
#13
REVIEW
Meritxell Riquelme, Leonora Martínez-Núñez
Filamentous fungi have proven to be a better-suited model system than unicellular yeasts in analyses of cellular processes such as polarized growth, exocytosis, endocytosis, and cytoskeleton-based organelle traffic. For example, the filamentous fungus Neurospora crassa develops a variety of cellular forms. Studying the molecular basis of these forms has led to a better, yet incipient, understanding of polarized growth. Polarity factors as well as Rho GTPases, septins, and a localized delivery of vesicles are the central elements described so far that participate in the shift from isotropic to polarized growth...
2016: F1000Research
https://www.readbyqxmd.com/read/27974709/adenovirus-mediated-overexpression-of-septin-2-attenuates-%C3%AE-smooth-muscle-actin-expression-and-adventitial-myofibroblast-migration-induced-by-angiotensin-ii
#14
Shu-Jie Guo, Peng Zhang, Ling-Yun Wu, Guan-Nan Zhang, Wen-Dong Chen, Ping-Jin Gao
Phenotypic transformation from adventitial fibroblasts (AFs) to myofibroblasts (MFs) is critical for vascular remodeling. Septin 2 was found to be downregulated during the differentiation of AFs to MFs induced by angiotensin II (Ang II); however, the role of septin 2 in this process is still unknown. In this study, we investigate whether septin 2 contributes to the adventitial MF phenotypic modulation caused by Ang II. The decreased level of septin 2 and the increased expression of α-smooth muscle actin (α-SMA), a marker of MFs, were readily observed in Ang II-stimulated MF differentiation...
2016: Journal of Vascular Research
https://www.readbyqxmd.com/read/27934514/septin-interferes-with-the-temperature-dependent-domain-formation-and-disappearance-of-lipid-bilayer-membranes
#15
Shunsuke Yamada, Takumi Isogai, Ryugo Tero, Yohko Tanaka-Takiguchi, Toru Ujihara, Makoto Kinoshita, Kingo Takiguchi
Domain formation or compartmentalization in a lipid bilayer membrane has been thought to take place dynamically in cell membranes and play important roles in the spatiotemporal regulation of their physiological functions. In addition, the membrane skeleton, which is a protein assembly beneath the cell membrane, also regulates the properties as well as the morphology of membranes because of its role as a diffusion barrier against constitutive molecules of the membrane or as a scaffold for physiological reactions...
December 6, 2016: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/27891501/septins-and-bacterial-infection
#16
REVIEW
Vincenzo Torraca, Serge Mostowy
Septins, a unique cytoskeletal component associated with cellular membranes, are increasingly recognized as having important roles in host defense against bacterial infection. A role for septins during invasion of Listeria monocytogenes into host cells was first proposed in 2002. Since then, work has shown that septins assemble in response to a wide variety of invasive bacterial pathogens, and septin assemblies can have different roles during the bacterial infection process. Here we review the interplay between septins and bacterial pathogens, highlighting septins as a structural determinant of host defense...
2016: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/27882315/septin-mutations-in-human-cancers
#17
REVIEW
Dimitrios Angelis, Elias T Spiliotis
Septins are GTP-binding proteins that are evolutionarily and structurally related to the RAS oncogenes. Septin expression levels are altered in many cancers and new advances point to how abnormal septin expression may contribute to the progression of cancer. In contrast to the RAS GTPases, which are frequently mutated and actively promote tumorigenesis, little is known about the occurrence and role of septin mutations in human cancers. Here, we review septin missense mutations that are currently in the Catalog of Somatic Mutations in Cancer (COSMIC) database...
2016: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/27878927/the-septin-protein-sep4-facilitates-host-infection-by-plant-fungal-pathogens-via-mediating-initiation-of-infection-structure-formation
#18
Hui-Qiang Feng, Gui-Hua Li, Du Shun-Wen, Song Yang, Xue-Qian Li, Paul de Figueiredo, Qing-Ming Qin
Many phytopathogenic fungi use infection structures (IFSs, i.e., appressoria and infection cushions) to penetrate host cuticles. However, the conserved mechanisms that mediate initiation of IFS formation in divergent pathogens upon sensing the presence of host plants remain obscure. Here, we demonstrate that a conserved septin gene SEP4 plays crucial roles in this process. Disruption of SEP4 in the plant gray mold fungus Botrytis cinerea completely blocked IFS formation and abolished the virulence of ΔBcsep4 mutants on unwounded hosts...
November 23, 2016: Environmental Microbiology
https://www.readbyqxmd.com/read/27878118/cancer-related-functions-and-subcellular-localizations-of-septins
#19
REVIEW
Christian Poüs, Laurence Klipfel, Anita Baillet
Since the initial discovery of septin family GTPases, the understanding of their molecular organization and cellular roles keeps being refined. Septins have been involved in many physiological processes and the misregulation of specific septin gene expression has been implicated in diverse human pathologies, including neurological disorders and cancer. In this minireview, we focus on the importance of the subunit composition and subcellular localization of septins relevant to tumor initiation, progression, and metastasis...
2016: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/27866222/the-cytoskeletal-protein-septin-11-is-associated-with-human-obesity-and-is-involved-in-adipocyte-lipid-storage-and-metabolism
#20
Natalia Moreno-Castellanos, Amaia Rodríguez, Yoana Rabanal-Ruiz, Alejandro Fernández-Vega, José López-Miranda, Rafael Vázquez-Martínez, Gema Frühbeck, María M Malagón
AIMS/HYPOTHESIS: Septins are newly identified members of the cytoskeleton that have been proposed as biomarkers of a number of diseases. However, septins have not been characterised in adipose tissue and their relationship with obesity and insulin resistance remains unknown. Herein, we characterised a member of this family, septin 11 (SEPT11), in human adipose tissue and analysed its potential involvement in the regulation of adipocyte metabolism. METHODS: Gene and protein expression levels of SEPT11 were analysed in human adipose tissue...
February 2017: Diabetologia
keyword
keyword
13115
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"