The hydrophobic core of the Sec61 translocon defines the hydrophobicity threshold for membrane integration.

Abstract:

:The Sec61 translocon mediates the translocation of proteins across the endoplasmic reticulum membrane and the lateral integration of transmembrane segments into the lipid bilayer. The structure of the idle translocon is closed by a lumenal plug domain and a hydrophobic constriction ring. To test the function of the apolar constriction, we have mutated all six ring residues of yeast Sec61p to more hydrophilic, bulky, or even charged amino acids (alanines, glycines, serines, tryptophans, lysines, or aspartates). The translocon was found to be surprisingly tolerant even to the charge mutations in the constriction ring, because growth and translocation efficiency were not drastically affected. Most interestingly, ring mutants were found to affect the integration of hydrophobic sequences into the lipid bilayer, indicating that the translocon does not simply catalyze the partitioning of potential transmembrane segments between an aqueous environment and the lipid bilayer but that it also plays an active role in setting the hydrophobicity threshold for membrane integration.

journal_name

Mol Biol Cell

authors

Junne T,Kocik L,Spiess M

doi

10.1091/mbc.e10-01-0060

subject

Has Abstract

pub_date

2010-05-15 00:00:00

pages

1662-70

issue

10

eissn

1059-1524

issn

1939-4586

pii

E10-01-0060

journal_volume

21

pub_type

杂志文章
  • The Werner syndrome protein is involved in RNA polymerase II transcription.

    abstract::Werner syndrome (WS) is a human progeroid syndrome characterized by the early onset of a large number of clinical features associated with the normal aging process. The complex molecular and cellular phenotypes of WS involve characteristic features of genomic instability and accelerated replicative senescence. The gen...

    journal_title:Molecular biology of the cell

    pub_type: 杂志文章

    doi:10.1091/mbc.10.8.2655

    authors: Balajee AS,Machwe A,May A,Gray MD,Oshima J,Martin GM,Nehlin JO,Brosh R,Orren DK,Bohr VA

    更新日期:1999-08-01 00:00:00

  • Glycoprotein gp130 of dictyostelium discoideum influences macropinocytosis and adhesion.

    abstract::Glycoprotein gp130, found on the plasma membrane of Dictyostelium discoideum amoebae, was postulated previously to play a role in phagocytosis. The gene for gp130 was cloned and when translated, yielded a 768 amino acid preproprotein of 85.3 kDa. It had nearly 40% similarity to the 138 kDa family of glycoproteins impl...

    journal_title:Molecular biology of the cell

    pub_type: 杂志文章

    doi:10.1091/mbc.e04-06-0483

    authors: Chia CP,Gomathinayagam S,Schmaltz RJ,Smoyer LK

    更新日期:2005-06-01 00:00:00

  • Identification and characterization of regulator of G protein signaling 4 (RGS4) as a novel inhibitor of tubulogenesis: RGS4 inhibits mitogen-activated protein kinases and vascular endothelial growth factor signaling.

    abstract::Tubulogenesis by epithelial cells regulates kidney, lung, and mammary development, whereas that by endothelial cells regulates vascular development. Although functionally dissimilar, the processes necessary for tubulation by epithelial and endothelial cells are very similar. We performed microarray analysis to further...

    journal_title:Molecular biology of the cell

    pub_type: 杂志文章

    doi:10.1091/mbc.e04-06-0479

    authors: Albig AR,Schiemann WP

    更新日期:2005-02-01 00:00:00

  • The HIF target ATG9A is essential for epithelial barrier function and tight junction biogenesis.

    abstract::Intestinal epithelial cells (IECs) exist in a metabolic state of low oxygen tension termed "physiologic hypoxia." An important factor in maintaining intestinal homeostasis is the transcription factor hypoxia-inducible factor (HIF), which is stabilized under hypoxic conditions and mediates IEC homeostatic responses to ...

    journal_title:Molecular biology of the cell

    pub_type: 杂志文章

    doi:10.1091/mbc.E20-05-0291

    authors: Dowdell AS,Cartwright IM,Goldberg MS,Kostelecky R,Ross T,Welch N,Glover LE,Colgan SP

    更新日期:2020-09-15 00:00:00

  • gdt1, a new signal transduction component for negative regulation of the growth-differentiation transition in Dictyostelium discoideum.

    abstract::Discoidin I expression was used as a marker to screen for mutants affected in the growth-differentiation transition (GDT) of Dictyostelium. By REMI mutagenesis we have isolated mutant 2-9, an overexpressor of discoidin I. It displays normal morphogenesis but shows premature entry into the developmental cycle. The disr...

    journal_title:Molecular biology of the cell

    pub_type: 杂志文章

    doi:10.1091/mbc.11.5.1631

    authors: Zeng C,Anjard C,Riemann K,Konzok A,Nellen W

    更新日期:2000-05-01 00:00:00

  • Myristoylated, alanine-rich C-kinase substrate phosphorylation regulates growth cone adhesion and pathfinding.

    abstract::Repellents evoke growth cone turning by eliciting asymmetric, localized loss of actin cytoskeleton together with changes in substratum attachment. We have demonstrated that semaphorin-3A (Sema3A)-induced growth cone detachment and collapse require eicosanoid-mediated activation of protein kinase C epsilon (PKC epsilon...

    journal_title:Molecular biology of the cell

    pub_type: 杂志文章

    doi:10.1091/mbc.e05-12-1183

    authors: Gatlin JC,Estrada-Bernal A,Sanford SD,Pfenninger KH

    更新日期:2006-12-01 00:00:00

  • Rab11 facilitates cross-talk between autophagy and endosomal pathway through regulation of Hook localization.

    abstract::During autophagy, double-membrane autophagosomes deliver sequestered cytoplasmic content to late endosomes and lysosomes for degradation. The molecular mechanism of autophagosome maturation is still poorly characterized. The small GTPase Rab11 regulates endosomal traffic and is thought to function at the level of recy...

    journal_title:Molecular biology of the cell

    pub_type: 杂志文章

    doi:10.1091/mbc.E13-10-0574

    authors: Szatmári Z,Kis V,Lippai M,Hegedus K,Faragó T,Lorincz P,Tanaka T,Juhász G,Sass M

    更新日期:2014-02-01 00:00:00

  • An interdomain binding site on HIV-1 Nef interacts with PACS-1 and PACS-2 on endosomes to down-regulate MHC-I.

    abstract::The human immunodeficiency virus type 1 (HIV-1) accessory protein Nef directs virus escape from immune surveillance by subverting host cell intracellular signaling and membrane traffic to down-regulate cell-surface major histocompatibility complex class I (MHC-I). The interaction of Nef with the sorting proteins PACS-...

    journal_title:Molecular biology of the cell

    pub_type: 杂志文章

    doi:10.1091/mbc.E11-11-0928

    authors: Dikeakos JD,Thomas L,Kwon G,Elferich J,Shinde U,Thomas G

    更新日期:2012-06-01 00:00:00

  • The cytoplasmic chaperone hsp104 is required for conformational repair of heat-denatured proteins in the yeast endoplasmic reticulum.

    abstract::Severe heat stress causes protein denaturation in various cellular compartments. If Saccharomyces cerevisiae cells grown at 24 degrees C are preconditioned at 37 degrees C, proteins denatured by subsequent exposure to 48-50 degrees C can be renatured when the cells are allowed to recover at 24 degrees C. Conformationa...

    journal_title:Molecular biology of the cell

    pub_type: 杂志文章

    doi:10.1091/mbc.10.11.3623

    authors: Hänninen AL,Simola M,Saris N,Makarow M

    更新日期:1999-11-01 00:00:00

  • Casein kinase II and calcineurin modulate TRPP function and ciliary localization.

    abstract::Cilia serve as sensory devices in a diversity of organisms and their defects contribute to many human diseases. In primary cilia of kidney cells, the transient receptor potential polycystin (TRPP) channels polycystin-1 (PC-1) and polycystin-2 (PC-2) act as a mechanosensitive channel, with defects resulting in autosoma...

    journal_title:Molecular biology of the cell

    pub_type: 杂志文章

    doi:10.1091/mbc.e05-10-0935

    authors: Hu J,Bae YK,Knobel KM,Barr MM

    更新日期:2006-05-01 00:00:00

  • S-phase checkpoint genes safeguard high-fidelity sister chromatid cohesion.

    abstract::Cohesion establishment and maintenance are carried out by proteins that modify the activity of Cohesin, an essential complex that holds sister chromatids together. Constituents of the replication fork, such as the DNA polymerase alpha-binding protein Ctf4, contribute to cohesion in ways that are poorly understood. To ...

    journal_title:Molecular biology of the cell

    pub_type: 杂志文章

    doi:10.1091/mbc.e03-09-0637

    authors: Warren CD,Eckley DM,Lee MS,Hanna JS,Hughes A,Peyser B,Jie C,Irizarry R,Spencer FA

    更新日期:2004-04-01 00:00:00

  • Cell cycle regulation of VCIP135 deubiquitinase activity and function in p97/p47-mediated Golgi reassembly.

    abstract::In mammalian cells, the inheritance of the Golgi apparatus into the daughter cells during each cycle of cell division is mediated by a disassembly and reassembly process, and this process is precisely controlled by phosphorylation and ubiquitination. VCIP135 (valosin-containing protein p97/p47 complex-interacting prot...

    journal_title:Molecular biology of the cell

    pub_type: 杂志文章

    doi:10.1091/mbc.E15-01-0041

    authors: Zhang X,Wang Y

    更新日期:2015-06-15 00:00:00

  • Neurodegeneration-associated mutant TREM2 proteins abortively cycle between the ER and ER-Golgi intermediate compartment.

    abstract::Triggering receptor expressed on myeloid cells 2 (TREM2) is a transmembrane protein expressed on microglia within the brain. Several rare mutations in TREM2 cause an early-onset form of neurodegeneration when inherited homozygously. Here we investigate how these mutations affect the intracellular transport of TREM2. W...

    journal_title:Molecular biology of the cell

    pub_type: 杂志文章

    doi:10.1091/mbc.E17-06-0423

    authors: Sirkis DW,Aparicio RE,Schekman R

    更新日期:2017-10-01 00:00:00

  • A double-strand break repair component is essential for S phase completion in fission yeast cell cycling.

    abstract::Fission yeast rad22(+), a homologue of budding yeast RAD52, encodes a double-strand break repair component, which is dispensable for proliferation. We, however, have recently obtained a cell division cycle mutant with a temperature-sensitive allele of rad22(+), designated rad22-H6, which resulted from a point mutation...

    journal_title:Molecular biology of the cell

    pub_type: 杂志文章

    doi:10.1091/mbc.10.10.3331

    authors: Suto K,Nagata A,Murakami H,Okayama H

    更新日期:1999-10-01 00:00:00

  • Superresolution microscopy of the β-carboxysome reveals a homogeneous matrix.

    abstract::Carbon fixation in cyanobacteria makes a major contribution to the global carbon cycle. The cyanobacterial carboxysome is a proteinaceous microcompartment that protects and concentrates the carbon-fixing enzyme ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCO) in a paracrystalline lattice, making it possible f...

    journal_title:Molecular biology of the cell

    pub_type: 杂志文章

    doi:10.1091/mbc.E17-01-0069

    authors: Niederhuber MJ,Lambert TJ,Yapp C,Silver PA,Polka JK

    更新日期:2017-10-01 00:00:00

  • Defects in structural integrity of ergosterol and the Cdc50p-Drs2p putative phospholipid translocase cause accumulation of endocytic membranes, onto which actin patches are assembled in yeast.

    abstract::Specific changes in membrane lipid composition are implicated in actin cytoskeletal organization, vesicle formation, and control of cell polarity. Cdc50p, a membrane protein in the endosomal/trans-Golgi network compartments, is a noncatalytic subunit of Drs2p, which is implicated in translocation of phospholipids acro...

    journal_title:Molecular biology of the cell

    pub_type: 杂志文章

    doi:10.1091/mbc.e05-05-0452

    authors: Kishimoto T,Yamamoto T,Tanaka K

    更新日期:2005-12-01 00:00:00

  • Magazine or journal--what is the difference? The role of the monitoring editor.

    abstract::Scientific communication, career advancement, and funding decisions are all dependent on research publications. The way manuscripts are handled by high-visibility, professionally edited magazines differs from the way academic journals evaluate manuscripts, using active scientists as monitoring editors. In this essay, ...

    journal_title:Molecular biology of the cell

    pub_type: 杂志文章

    doi:10.1091/mbc.E12-12-0899

    authors: Bretscher A

    更新日期:2013-04-01 00:00:00

  • Constitutively active G protein-coupled receptor mutants block dictyostelium development.

    abstract::cAR1, a G protein-coupled receptor (GPCR) for cAMP, is required for the multicellular development of Dictyostelium. The activation of multiple pathways by cAR1 is transient because of poorly defined adaptation mechanisms. To investigate this, we used a genetic screen for impaired development to isolate four dominant-n...

    journal_title:Molecular biology of the cell

    pub_type: 杂志文章

    doi:10.1091/mbc.e04-06-0456

    authors: Zhang M,Goswami M,Hereld D

    更新日期:2005-02-01 00:00:00

  • Nab2 functions in the metabolism of RNA driven by polymerases II and III.

    abstract::Gene expression in eukaryotes is an essential process that includes transcription, RNA processing, and export. One important player in this interface is the poly(A)(+)-RNA-binding protein Nab2, which regulates the mRNA poly(A)(+)-tail length and export. Here we show that Nab2 has additional roles during mRNA transcrip...

    journal_title:Molecular biology of the cell

    pub_type: 杂志文章

    doi:10.1091/mbc.E11-01-0055

    authors: González-Aguilera C,Tous C,Babiano R,de la Cruz J,Luna R,Aguilera A

    更新日期:2011-08-01 00:00:00

  • TOR1 and TOR2 are structurally and functionally similar but not identical phosphatidylinositol kinase homologues in yeast.

    abstract::The Saccharomyces cerevisiae genes TOR1 and TOR2 were originally identified by mutations that confer resistance to the immunosuppressant rapamycin. TOR2 was previously shown to encode an essential 282-kDa phosphatidylinositol kinase (PI kinase) homologue. The TOR1 gene product is also a large (281 kDa) PI kinase homol...

    journal_title:Molecular biology of the cell

    pub_type: 杂志文章

    doi:10.1091/mbc.5.1.105

    authors: Helliwell SB,Wagner P,Kunz J,Deuter-Reinhard M,Henriquez R,Hall MN

    更新日期:1994-01-01 00:00:00

  • Mitotic chromosome condensation requires Brn1p, the yeast homologue of Barren.

    abstract::In vitro studies suggest that the Barren protein may function as an activator of DNA topoisomerase II and/or as a component of the Xenopus condensin complex. To better understand the role of Barren in vivo, we generated conditional alleles of the structural gene for Barren (BRN1) in Saccharomyces cerevisiae. We show t...

    journal_title:Molecular biology of the cell

    pub_type: 杂志文章

    doi:10.1091/mbc.11.4.1293

    authors: Lavoie BD,Tuffo KM,Oh S,Koshland D,Holm C

    更新日期:2000-04-01 00:00:00

  • Transfection of choanoflagellates illuminates their cell biology and the ancestry of animal septins.

    abstract::As the closest living relatives of animals, choanoflagellates offer unique insights into animal origins and core mechanisms underlying animal cell biology. However, unlike traditional model organisms, such as yeast, flies, and worms, choanoflagellates have been refractory to DNA delivery methods for expressing foreign...

    journal_title:Molecular biology of the cell

    pub_type: 杂志文章

    doi:10.1091/mbc.E18-08-0514

    authors: Booth DS,Szmidt-Middleton H,King N

    更新日期:2018-12-01 00:00:00

  • Iterative sorting of apical and basolateral cargo in Madin-Darby canine kidney cells.

    abstract::For several decades, the trans-Golgi network (TGN) was considered the most distal stop and hence the ultimate protein-sorting station for distinct apical and basolateral transport carriers that reach their respective surface domains in the direct trafficking pathway. However, recent reports of apical and basolateral c...

    journal_title:Molecular biology of the cell

    pub_type: 杂志文章

    doi:10.1091/mbc.E16-02-0096

    authors: Treyer A,Pujato M,Pechuan X,Müsch A

    更新日期:2016-07-15 00:00:00

  • Diacylglycerol kinase ζ regulates RhoA activation via a kinase-independent scaffolding mechanism.

    abstract::Rho GTPases share a common inhibitor, Rho guanine nucleotide dissociation inhibitor (RhoGDI), which regulates their expression levels, membrane localization, and activation state. The selective dissociation of individual Rho GTPases from RhoGDI ensures appropriate responses to cellular signals, but the underlying mech...

    journal_title:Molecular biology of the cell

    pub_type: 杂志文章

    doi:10.1091/mbc.E12-01-0026

    authors: Ard R,Mulatz K,Abramovici H,Maillet JC,Fottinger A,Foley T,Byham MR,Iqbal TA,Yoneda A,Couchman JR,Parks RJ,Gee SH

    更新日期:2012-10-01 00:00:00

  • Regulation of cyclin-dependent kinase 4 translation through CUG-binding protein 1 and microRNA-222 by polyamines.

    abstract::The amino acid-derived polyamines are organic cations that are essential for growth in all mammalian cells, but their exact roles at the molecular level remain largely unknown. Here we provide evidence that polyamines promote the translation of cyclin-dependent kinase 4 (CDK4) by the action of CUG-binding protein 1 (C...

    journal_title:Molecular biology of the cell

    pub_type: 杂志文章

    doi:10.1091/mbc.E11-01-0069

    authors: Xiao L,Cui YH,Rao JN,Zou T,Liu L,Smith A,Turner DJ,Gorospe M,Wang JY

    更新日期:2011-09-01 00:00:00

  • The GTPase SPAG-1 orchestrates meiotic program by dictating meiotic resumption and cytoskeleton architecture in mouse oocytes.

    abstract::In mammals, a finite population of oocytes is generated during embryogenesis, and proper oocyte meiotic divisions are crucial for fertility. Sperm-associated antigen 1 (SPAG-1) has been implicated in infertility and tumorigenesis; however, its relevance in cell cycle programs remains rudimentary. Here we explore a nov...

    journal_title:Molecular biology of the cell

    pub_type: 杂志文章

    doi:10.1091/mbc.E16-02-0132

    authors: Huang C,Wu D,Khan FA,Jiao X,Guan K,Huo L

    更新日期:2016-06-01 00:00:00

  • Differential phosphorylation signals control endocytosis of GPR15.

    abstract::GPR15 is an orphan G protein-coupled receptor (GPCR) that serves for an HIV coreceptor and was also recently found as a novel homing receptor for T-cells implicated in colitis. We show that GPR15 undergoes a constitutive endocytosis in the absence of ligand. The endocytosis was clathrin dependent and partially depende...

    journal_title:Molecular biology of the cell

    pub_type: 杂志文章

    doi:10.1091/mbc.E16-09-0627

    authors: Okamoto Y,Shikano S

    更新日期:2017-08-15 00:00:00

  • Cell cycle-regulated trafficking of Chs2 controls actomyosin ring stability during cytokinesis.

    abstract::Cytokinesis requires the coordination of many cellular complexes, particularly those involved in the constriction and reconstruction of the plasma membrane in the cleavage furrow. We have investigated the regulation and function of vesicle transport and fusion during cytokinesis in budding yeast. By using time-lapse c...

    journal_title:Molecular biology of the cell

    pub_type: 杂志文章

    doi:10.1091/mbc.e04-12-1090

    authors: VerPlank L,Li R

    更新日期:2005-05-01 00:00:00

  • Fibroblast growth factor receptor-1 (FGFR1) nuclear dynamics reveal a novel mechanism in transcription control.

    abstract::Nuclear FGFR1 acts as a developmental gene regulator in cooperation with FGF-2, RSK1, and CREB-binding protein (CBP). FRAP analysis revealed three nuclear FGFR1 populations: i) a fast mobile, ii) a slower mobile population reflecting chromatin-bound FGFR1, and iii) an immobile FGFR1 population associated with the nucl...

    journal_title:Molecular biology of the cell

    pub_type: 杂志文章

    doi:10.1091/mbc.e08-06-0600

    authors: Dunham-Ems SM,Lee YW,Stachowiak EK,Pudavar H,Claus P,Prasad PN,Stachowiak MK

    更新日期:2009-05-01 00:00:00

  • Of microtubules and memory: implications for microtubule dynamics in dendrites and spines.

    abstract::Microtubules (MTs) are cytoskeletal polymers composed of repeating subunits of tubulin that are ubiquitously expressed in eukaryotic cells. They undergo a stochastic process of polymerization and depolymerization from their plus ends termed dynamic instability. MT dynamics is an ongoing process in all cell types and h...

    journal_title:Molecular biology of the cell

    pub_type: 杂志文章,评审

    doi:10.1091/mbc.E15-11-0769

    authors: Dent EW

    更新日期:2017-01-01 00:00:00