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Title: Subunit-dependent modulation of septin assembly: Budding yeast septin Shs1 promotes ring and gauze formation

Journal Article · · Journal of Cell Biology
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  1. Univ. of California, Berkeley, CA (United States).Dept. of Molecular and Cell Biology. Division of Biochemistry and Molecular Biology
  2. Univ. of California, Berkeley, CA (United States).Dept. of Molecular and Cell Biology. Division of Biochemistry and Molecular Biology; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Life Science Division; Howard Hughes Medical Inst., Chevy Chase, MD (United States)

Septins are conserved guanosine triphosphate–binding cytoskeletal proteins involved in membrane remodeling. In budding yeast, five mitotic septins (Cdc3, Cdc10, Cdc11, Cdc12, and Shs1), which are essential for cytokinesis, transition during bud growth from a patch to a collar, which splits into two rings in cytokinesis and is disassembled before the next cell cycle. Cdc3, Cdc10, Cdc11, and Cdc12 form an apolar octameric rod with Cdc11 at each tip, which polymerizes into straight paired filaments. We show that Shs1 substitutes for Cdc11, resulting in octameric rods that do not polymerize into filaments but associate laterally, forming curved bundles that close into rings. In vivo, half of shs1Δ mutant cells exhibit incomplete collars and disrupted neck filaments. Importantly, different phosphomimetic mutations in Shs1 can either prevent ring formation or promote formation of a gauzelike meshwork. These results show that a single alternative terminal subunit is sufficient to confer a distinctive higher-order septin ultrastructure that can be further regulated by phosphorylation.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER). Biological Systems Science Division; National Institutes of Health (NIH)
Grant/Contract Number:
AC02-05CH11231; GM86603; GM21841
OSTI ID:
1625162
Journal Information:
Journal of Cell Biology, Vol. 195, Issue 6; ISSN 0021-9525
Publisher:
Rockefeller University PressCopyright Statement
Country of Publication:
United States
Language:
English

References (71)

Shs1p: A Novel Member of Septin That Interacts with Spa2p, Involved in Polarized Growth inSaccharomyces cerevisiae journal October 1998
Self- and Actin-Templated Assembly of Mammalian Septins journal December 2002
SPR28, a sixth member of the septin gene family in Saccharomyces cerevisiae that is expressed specifically in sporulating cells journal October 1996
Intermediate filaments: versatile building blocks of cell structure journal February 2008
Global Analysis of Cdk1 Substrate Phosphorylation Sites Provides Insights into Evolution journal September 2009
Nim1-related kinases coordinate cell cycle progression with the organization of the peripheral cytoskeleton in yeast journal January 1999
Septin-Mediated Uniform Bracing of Phospholipid Membranes journal January 2009
Septin Stability and Recycling during Dynamic Structural Transitions in Cell Division and Development journal August 2008
Interactive learning: Lessons from two hybrids over two decades journal December 2009
Reuse, replace, recycle: Specificity in subunit inheritance and assembly of higher-order septin structures during mitotic and meiotic division in budding yeast journal January 2009
SPIDER and WEB: Processing and Visualization of Images in 3D Electron Microscopy and Related Fields journal January 1996
Chapter 1 High Pressure Freezing and Freeze Substitution of Schizosaccharomyces pombe and Saccharomyces cerevisiae for TEM book January 2008
The GTP-Binding Protein Septin 7 Is Critical for Dendrite Branching and Dendritic-Spine Morphology journal October 2007
Cell Division: Septins in common? journal October 1994
Polymerization of Purified Yeast Septins: Evidence That Organized Filament Arrays May Not Be Required for Septin Function journal November 1998
Functional Organization of the S. cerevisiae Phosphorylation Network journal March 2009
A set of epitope-tagging integration vectors for functional analysis in journal July 2005
Genetic Control of the Cell Division Cycle in Yeast: A model to account for the order of cell cycle events is deduced from the phenotypes of yeast mutants journal January 1974
The septin cortex at the yeast mother–bud neck journal December 2001
Structural Insights into Microtubule Function journal June 2000
Iqg1p links spatial and secretion landmarks to polarity and cytokinesis journal November 2002
GTP-induced conformational changes in septins and implications for function journal September 2009
Direct Phosphorylation and Activation of a Nim1-related Kinase Gin4 by Elm1 in Budding Yeast journal July 2006
Spatial Coordination of Cytokinetic Events by Compartmentalization of the Cell Cortex journal July 2004
Conquering the complex world of human septins: implications for health and disease journal February 2010
Genetic control of the cell division cycle in yeast *1IV. Genes controlling bud emergence and cytokinesis journal December 1971
A Septin Diffusion Barrier at the Base of the Primary Cilium Maintains Ciliary Membrane Protein Distribution journal June 2010
The Caenorhabditis elegans septin complex is nonpolar journal June 2007
Computer Visualization of Three-Dimensional Image Data Using IMOD journal January 1996
A highly ordered ring of membrane-associated filaments in budding yeast. journal June 1976
EMAN: Semiautomated Software for High-Resolution Single-Particle Reconstructions journal December 1999
Diversity of septin scaffolds journal February 2006
Structural insights into yeast septin organization from polarized fluorescence microscopy journal September 2006
Actin and Septin Ultrastructures at the Budding Yeast Cell Cortex journal January 2005
Role of the Yeast Gin4p Protein Kinase in Septin Assembly and the Relationship between Septin Assembly and Septin Function journal November 1998
Structural insights shed light onto septin assemblies and function journal February 2008
Planar Cell Polarity Acts Through Septins to Control Collective Cell Movement and Ciliogenesis journal July 2010
Cell Cycle-dependent Assembly of a Gin4-Septin Complex journal June 2002
Analysis of septins across kingdoms reveals orthology and new motifs journal January 2007
Some assembly required: yeast septins provide the instruction manual journal August 2005
Hsl7 Localizes to a Septin Ring and Serves as an Adapter in a Regulatory Pathway That Relieves Tyrosine Phosphorylation of Cdc28 Protein Kinase inSaccharomyces cerevisiae journal October 1999
Structural insight into filament formation by mammalian septins journal July 2007
Symmetry of Septin Hourglass and Ring Structures journal September 2007
The septin family of GTPases: architecture and dynamics journal May 2008
Saccharomyces cerevisiae septins: Supramolecular organization of heterooligomers and the mechanism of filament assembly journal June 2008
Phosphorylation of the Septin Cdc3 in G1 by the Cdc28 Kinase Is Essential for Efficient Septin Ring Disassembly journal January 2002
Cytoskeletal modification of Rho guanine nucleotide exchange factor activity: identification of a Rho guanine nucleotide exchange factor as a binding partner for Sept9b, a mammalian septin journal November 2004
Immunofluorescence localization of the Saccharomyces cerevisiae CDC12 gene product to the vicinity of the 10-nm filaments in the mother-bud neck. journal October 1987
Protein–Protein Interactions Governing Septin Heteropentamer Assembly and Septin Filament Organization in Saccharomyces cerevisiae journal October 2004
Shs1 Plays Separable Roles in Septin Organization and Cytokinesis in Saccharomyces cerevisiae journal September 2007
The Septins Function in G1 Pathways that Influence the Pattern of Cell Growth in Budding Yeast journal April 2008
Targeting Metastable Coiled-Coil Domains by Computational Design journal August 2008
Correction for non-perpendicularity of beam and tilt axis in tomographic reconstructions with the IMOD package: NON-PERPENDICULARITY OF BEAM AND TILT AXIS journal April 2008
Plasma Membrane Compartmentalization in Yeast by Messenger RNA Transport and a Septin Diffusion Barrier journal October 2000
The Septins Are Required for the Mitosis-specific Activation of the Gin4 Kinase journal November 1998
Septin Filament Formation Is Essential in Budding Yeast journal April 2011
Nis1 encoded by YNL078W: a new neck protein of Saccharomyces cerevisiae. journal January 2001
Septins journal May 2011
Interaction Trap/Two‐Hybrid System to Identify Interacting Proteins journal April 2011
The septins: roles in cytokinesis and other processes journal February 1996
Compartmentalization of the Cell Cortex by Septins Is Required for Maintenance of Cell Polarity in Yeast journal May 2000
Phosphorylation-Dependent Regulation of Septin Dynamics during the Cell Cycle journal March 2003
Septin Function in Candida albicans Morphogenesis journal August 2002
Septins, under Cla4p Regulation, and the Chitin Ring Are Required for Neck Integrity in Budding Yeast journal May 2003
Deciphering the rules governing assembly order of mammalian septin complexes journal September 2011
Formation of septum-like structures at locations remote from the budding sites in cytokinesis-defective mutants of Saccharomyces cerevisiae. journal January 1985
Immunofluorescence Localization of the Saccharomyces cerevisiae CDC12 Gene Product to the Vicinity of the 10-nm Filaments in the Mother-Bud Neck journal October 1987
Structural Insights into Microtubule Function journal June 2001
Nucleotide binding and filament assembly of recombinant yeast septin complexes journal January 2005
New insights into the phylogenetic distribution and evolutionary origins of the septins journal August 2011
Polymerization of Purified Yeast Septins: Evidence That Organized Filament Arrays May Not Be Required for Septin Function text January 1998

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An amphipathic helix enables septins to sense micrometer-scale membrane curvature journal January 2019
Persistent actin depolarization caused by ethanol induces the formation of multiple small cortical septin rings in yeast journal January 2018
Polarization of the Endoplasmic Reticulum by ER-Septin Tethering journal July 2014
Architectural Insights into a Ciliary Partition journal February 2013
Cytoskeleton: Cirque du Septins journal June 2014
Daughter Cell Identity Emerges from the Interplay of Cdc42, Septins, and Exocytosis journal July 2013
Architecture and dynamic remodelling of the septin cytoskeleton during the cell cycle journal December 2014
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Septin ring size scaling and dynamics require the coiled-coil region of Shs1p journal September 2012
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Aim44p regulates phosphorylation of Hof1p to promote contractile ring closure during cytokinesis in budding yeast journal March 2014
Cell type–specific expression of SEPT3-homology subgroup members controls the subunit number of heteromeric septin complexes journal May 2014
Detection of protein–protein interactions at the septin collar inSaccharomyces cerevisiaeusing a tripartite split-GFP system journal September 2016
Interplay of septin amphipathic helices in sensing membrane-curvature and filament bundling journal May 2020
Choanoflagellate transfection illuminates their cell biology and the ancestry of animal septins journal August 2018
The Long and Viscous Road: Uncovering Nuclear Diffusion Barriers in Closed Mitosis journal July 2014
A Single Nucleotide Polymorphism Uncovers a Novel Function for the Transcription Factor Ace2 during Candida albicans Hyphal Development journal April 2015
Distinct Septin Heteropolymers Co-Exist during Multicellular Development in the Filamentous Fungus Aspergillus nidulans journal March 2014
Phosphorylation of Pnut in the Early Stages ofDrosophilaEmbryo Development Affects Association of the Septin Complex with the Membrane and Is Important for Viability journal January 2018
Higher-Order Septin Assembly Is Driven by GTP-Promoted Conformational Changes: Evidence From Unbiased Mutational Analysis in Saccharomyces cerevisiae journal January 2014
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