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Nedd4 and Nedd4-2: Closely Related Ubiquitin-Protein Ligases with Distinct Physiological Functions
Cell Death and Differentiation (2010) 17, 68–77 & 2010 Macmillan Publishers Limited All rights reserved 1350-9047/10 $32.00 www.nature.com/cdd Review Nedd4 and Nedd4-2: closely related ubiquitin-protein ligases with distinct physiological functions B Yang*,1 and S Kumar*,2 The Nedd4 (neural precursor cell-expressed developmentally downregulated gene 4) family of ubiquitin ligases (E3s) is characterized by a distinct modular domain architecture, with each member consisting of a C2 domain, 2–4 WW domains, and a HECT-type ligase domain. Of the nine mammalian members of this family, Nedd4 and its close relative, Nedd4-2, represent the ancestral ligases with strong similarity to the yeast, Rsp5. In Saccharomyces cerevisiae Rsp5 has a key role in regulating the trafficking, sorting, and degradation of a large number of proteins in multiple cellular compartments. However, in mammals the Nedd4 family members, including Nedd4 and Nedd4-2, appear to have distinct functions, thereby suggesting that these E3s target specific proteins for ubiquitylation. In this article we focus on the biology and emerging functions of Nedd4 and Nedd4-2, and review recent in vivo studies on these E3s. Cell Death and Differentiation (2010) 17, 68–77; doi:10.1038/cdd.2009.84; published online 26 June 2009 Ubiquitylation controls biological signaling in many different ubiquitin-protein ligase (E3). A protein can be monoubiquity- ways.1,2 For example, the ubiquitylation of a misfolded or lated, multi-monoubiquitylated, or polyubiquitylated, and the damaged protein leads to its degradation by the 26S type of ubiquitylation determines the fate of the protein.1,2 proteasome before it can get to its subcellular site where it Ubiquitin itself contains seven lysine residues, all of which can normally functions. -
Ribonuclease and Deoxyribonuclease Activities in Experimental and Human Tumors by the Histochemical Substrate Film Method*
Ribonuclease and Deoxyribonuclease Activities in Experimental and Human Tumors by the Histochemical Substrate Film Method* R. DAOUSTJANDHARUKOAMANOÕ (Laboratoires de Recherche, Institut du Cancer de Montréal,Hôpital Notre-Dame et Universitéde Montréal,Montréal,Canada) SUMMARY The ribonuclease and deoxyribonuclease activities of 65 experimental and human tu mors (32 different types) have been examined by histochemical substrate film methods. A same general pattern was obtained for the distribution of both nucleases in the various types of experimental and human tumors. The connective tissue stroma and the necrotic regions of the tumor masses showed various levels of nuclease activity, whereas the neoplastic cells showed no demonstrable activity. It appears that deficien cies in ribonuclease and deoxyribonuclease activities represent general properties of cancer cells. The possible significance of the losses of nuclease activities in carcinogenesis is dis cussed. Studies on nucleases by histochemical methods MATERIALS AND METHODS have shown that losses of ribonuclease (RNase) The experimental tumors used in the present and deoxyribonuclease (DNase) activities take study were mostly rat, mouse, and hamster trans- place in rat liver during azo-dye carcinogenesis (1, plantable tumors (see Table 1). The tumor-bearing 6). The loss of RNase activity is progressive and animals were obtained from commercial or private occurs before parenchymal cells become cancerous, sources, and the tumors were used as supplied or whereas the loss of DNase activity is abrupt and closely associated with the neoplastic transforma TABLE1 tion of parenchymal cells. EXPERIMENTALTUMORS If a loss of RNase or DNase activity plays an important role in tumor formation, the lack of SpeciesRat"""MouseHamsterTumorPrimary demonstrable nuclease activity observed in rat hepatomaNovikoff primary hepatomas should also be observed in a hepatomaWalker variety of tumors. -
E3 Ubiquitin Ligases: Key Regulators of Tgfβ Signaling in Cancer Progression
International Journal of Molecular Sciences Review E3 Ubiquitin Ligases: Key Regulators of TGFβ Signaling in Cancer Progression Abhishek Sinha , Prasanna Vasudevan Iyengar and Peter ten Dijke * Department of Cell and Chemical Biology and Oncode Institute, Leiden University Medical Center, 2300 RC Leiden, The Netherlands; [email protected] (A.S.); [email protected] (P.V.I.) * Correspondence: [email protected]; Tel.: +31-71-526-9271 Abstract: Transforming growth factor β (TGFβ) is a secreted growth and differentiation factor that influences vital cellular processes like proliferation, adhesion, motility, and apoptosis. Regulation of the TGFβ signaling pathway is of key importance to maintain tissue homeostasis. Perturbation of this signaling pathway has been implicated in a plethora of diseases, including cancer. The effect of TGFβ is dependent on cellular context, and TGFβ can perform both anti- and pro-oncogenic roles. TGFβ acts by binding to specific cell surface TGFβ type I and type II transmembrane receptors that are endowed with serine/threonine kinase activity. Upon ligand-induced receptor phosphorylation, SMAD proteins and other intracellular effectors become activated and mediate biological responses. The levels, localization, and function of TGFβ signaling mediators, regulators, and effectors are highly dynamic and regulated by a myriad of post-translational modifications. One such crucial modification is ubiquitination. The ubiquitin modification is also a mechanism by which crosstalk with other signaling pathways is achieved. Crucial effector components of the ubiquitination cascade include the very diverse family of E3 ubiquitin ligases. This review summarizes the diverse roles of E3 ligases that act on TGFβ receptor and intracellular signaling components. -
Smurf2-Mediated Stabilization of DNA Topoisomerase Iiα Controls Genomic Integrity
Published OnlineFirst June 13, 2017; DOI: 10.1158/0008-5472.CAN-16-2828 Cancer Molecular and Cellular Pathobiology Research Smurf2-Mediated Stabilization of DNA Topoisomerase IIa Controls Genomic Integrity Andrea Emanuelli1, Aurora P. Borroni1, Liat Apel-Sarid2, Pooja A. Shah1, Dhanoop Manikoth Ayyathan1, Praveen Koganti1, Gal Levy-Cohen1, and Michael Blank1 Abstract DNA topoisomerase IIa (Topo IIa) ensures genomic integ- pathological chromatin bridges formed during mitosis, a trait rity and unaltered chromosome inheritance and serves as a of Topo IIa–deficient cells and a hallmark of chromosome major target of several anticancer drugs. Topo IIa function is instability. Introducing Topo IIa into Smurf2-depleted cells well understood, but how its expression is regulated remains rescued this phenomenon. Smurf2 was a determinant of Topo unclear. Here, we identify the E3 ubiquitin ligase Smurf2 as a IIa protein levels in normal and cancer cells and tissues, and its physiologic regulator of Topo IIa levels. Smurf2 physically levels affected cell sensitivity to the Topo II–targeting drug interacted with Topo IIa and modified its ubiquitination status etoposide. Our results identified Smurf2 as an essential regu- to protect Topo IIa from the proteasomal degradation in dose- lator of Topo IIa, providing novel insights into its control and catalytically dependent manners. Smurf2-depleted cells and into the suggested tumor-suppressor functions of Smurf2. exhibited a reduced ability to resolve DNA catenanes and Cancer Res; 77(16); 1–11. Ó2017 AACR. Introduction mice knockout for Smurf2 develop a wide spectrum of tumors in different organs and tissues. These and other studies estab- DNA topoisomerase IIa (Topo IIa) is the major form of the lished Smurf2 as an important regulator of genomic integrity, Topo II enzyme in cycling vertebrate cells that acts to untangle whose inactivation results in carcinogenesis (7). -
HOXB6 Homeo Box B6 HOXB5 Homeo Box B5 WNT5A Wingless-Type
5 6 6 5 . 4 2 1 1 1 2 4 6 4 3 2 9 9 7 0 5 7 5 8 6 4 0 8 2 3 1 8 3 7 1 0 0 4 0 2 5 0 8 7 5 4 1 1 0 3 6 0 4 8 3 7 4 7 6 9 6 7 1 5 0 8 1 4 1 1 7 1 0 0 4 2 0 8 1 1 1 2 5 3 5 0 7 2 6 9 1 2 1 8 3 5 2 9 8 0 6 0 9 5 1 9 9 2 1 1 6 0 2 3 0 3 6 9 1 6 5 5 7 1 1 2 1 1 7 5 4 6 6 4 1 1 2 8 4 7 1 6 2 7 7 5 4 3 2 4 3 6 9 4 1 7 1 3 4 1 2 1 3 1 1 4 7 3 1 1 1 1 5 3 2 6 1 5 1 3 5 4 5 2 3 1 1 6 1 7 3 2 5 4 3 1 6 1 5 3 1 7 6 5 1 1 1 4 6 1 6 2 7 2 1 2 e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S HOXB6 homeo box B6 HOXB5 homeo box B5 WNT5A wingless-type MMTV integration site family, member 5A WNT5A wingless-type MMTV integration site family, member 5A FKBP11 FK506 binding protein 11, 19 kDa EPOR erythropoietin receptor SLC5A6 solute carrier family 5 sodium-dependent vitamin transporter, member 6 SLC5A6 solute carrier family 5 sodium-dependent vitamin transporter, member 6 RAD52 RAD52 homolog S. -
The UBE2L3 Ubiquitin Conjugating Enzyme: Interplay with Inflammasome Signalling and Bacterial Ubiquitin Ligases
The UBE2L3 ubiquitin conjugating enzyme: interplay with inflammasome signalling and bacterial ubiquitin ligases Matthew James George Eldridge 2018 Imperial College London Department of Medicine Submitted to Imperial College London for the degree of Doctor of Philosophy 1 Abstract Inflammasome-controlled immune responses such as IL-1β release and pyroptosis play key roles in antimicrobial immunity and are heavily implicated in multiple hereditary autoimmune diseases. Despite extensive knowledge of the mechanisms regulating inflammasome activation, many downstream responses remain poorly understood or uncharacterised. The cysteine protease caspase-1 is the executor of inflammasome responses, therefore identifying and characterising its substrates is vital for better understanding of inflammasome-mediated effector mechanisms. Using unbiased proteomics, the Shenoy grouped identified the ubiquitin conjugating enzyme UBE2L3 as a target of caspase-1. In this work, I have confirmed UBE2L3 as an indirect target of caspase-1 and characterised its role in inflammasomes-mediated immune responses. I show that UBE2L3 functions in the negative regulation of cellular pro-IL-1 via the ubiquitin- proteasome system. Following inflammatory stimuli, UBE2L3 assists in the ubiquitylation and degradation of newly produced pro-IL-1. However, in response to caspase-1 activation, UBE2L3 is itself targeted for degradation by the proteasome in a caspase-1-dependent manner, thereby liberating an additional pool of IL-1 which may be processed and released. UBE2L3 therefore acts a molecular rheostat, conferring caspase-1 an additional level of control over this potent cytokine, ensuring that it is efficiently secreted only in appropriate circumstances. These findings on UBE2L3 have implications for IL-1- driven pathology in hereditary fever syndromes, and autoinflammatory conditions associated with UBE2L3 polymorphisms. -
Datasheet for T7 Exonuclease (M0263; Lot 0031212)
Source: Purified from an E. coli strain containing a Unit Assay Conditions: 50 mM potassium Physical Purity: Purified to > 95% homogeneity TYB12 intein fusion acetate, 20 mM Tris-acetate, 10 mM magnesium as determined by SDS-PAGE analysis using T7 Exonuclease acetate, 1mM dithiothreitol (pH 7.9) and 0.15 mM Coomassie Blue detection. Supplied in: 10 mM Tris-HCl (pH 8.0), sonicated duplex [3H] DNA. 0.1 mM EDTA, 5 mM DTT and 50% glycerol. RNase Activity (Extended Digestion): A 10 µl Quality Control Assays 1-800-632-7799 reaction in NEBuffer 4 containing 40 ng of [email protected] Reagents Supplied with Enzyme: Single Stranded Deoxyribonuclease Activity flourescein labeled RNA transcript and 10 units www.neb.com 10X NEBuffer 4. (FAM Labeled Oligo): A 50 µl reaction in of T7 Exonuclease incubated at 37°C. After M0263S 003121214121 NEBuffer 4 containing a 20 nM solution of a incubation for 4 hours, > 90% of the substrate Reaction Conditions: fluorescent internal labeled oligonucleotide and a RNA remains intact as determined by gel minimum of 50 units of T7 Exonuclease incubated 1X NEBuffer 4. electrophoresis using fluorescence detection. M0263S Incubate at 25°C. for 16 hours at 37°C yields < 5% degradation as determined by capillary electrophoresis. 1,000 units 10,000 U/ml Lot: 0031212 Heat Inactivation: No 1X NEBuffer 4: RECOMBINANT Store at –20°C Exp: 12/14 50 mM potassium acetate Endonuclease Activity: Incubation of a 50 µl References: reaction containing 100 units of T7 Exonuclease Description: T7 Exonuclease acts in the 5´ to 20 mM Tris-acetate 1. -
Structural Characterization and Subunit Communication Of
STRUCTURAL CHARACTERIZATION AND SUBUNIT COMMUNICATION OF ESCHERICHIA COLI PYRUVATE DEHYDROGENASE MULTIENZYME COMPLEX By Jaeyoung Song A dissertation submitted to the Graduate School-Newark Rutgers, The State University of New Jersey In partial fulfillment of requirements for the degree of Doctor of Philosophy Graduate Program in Chemistry Written under the direction of Professor Frank Jordan and approved by Newark, New Jersey May, 2011 ABSTRACT OF THE THESIS Structural Characterization and Subunit Communication of Escherichia coli Pyruvate Dehydrogenase Multienzyme Complex By Jaeyoung Song Thesis Director: Professor Frank Jordan The pyruvate dehydrogenase multienzyme complex (PDHc) from Escherichia coli (E. coli) is the best characterized of the 2-oxoacid dehydrogenase complexes. The complex plays a role as catalyst for the conversion of pyruvate to acetyl Coenzyme A (acetylCoA) by three enzyme components in the complex. The complex is comprised of 24 copies of the dimeric pyruvate dehydrogenase (E1ec; 99,474 Da), a cubic core of 24 copies of dihydrolipoamide acetyltransferase (E2ec; 65,959 Da), and 12 copies of dihydrolipoamide dehydrogenase (E3ec; 50,554 Da) (1-3). The crystal structure of the E. coli pyruvate dehydrogenase complex E1 subunit (E1ec) has been deterimined, and there were three missing regions (residues 1-55, 401-413, and 541-557) remaining absent in the model due to high flexibilities of these regions (4). Most bacterial pyruvate dehydrogenase complexes from either Gram-positive or Gram-negative bacteria have E1 components with an 2 homodimeric quaternary structure. In a sequel to our previous publications (5-8), the first NMR study on the flexible regions of the E1 component from Escherichia coli and its biological relevance ii was presented. -
UBE2L3 (Ubch7) [6His-Tagged] E2 – Ubiquitin Conjugating Enzyme
UBE2L3 (UbcH7) [6His-tagged] E2 – Ubiquitin Conjugating Enzyme Alternate Names: E2-F1, EC 6.3.2.19, L-UBC, UbcH7, UbcM4, Ubiquitin conjugating enzyme E2-18 kDa UbcH7, Ubiquitin conjugating enzyme UbcH7 Cat. No. 62-0040-020 Quantity: 20 µg Lot. No. 1376 Storage: -70˚C FOR RESEARCH USE ONLY NOT FOR USE IN HUMANS CERTIFICATE OF ANALYSIS - Page 1 of 2 Background Physical Characteristics The enzymes of the ubiquitylation path- Species: human Protein Sequence: way play a pivotal role in a number of cel- MGSSHHHHHHSSGLEVLFQGPGSMAAS lular processes including regulated and Source: E. coli expression RRLMKELEEIRKCGMKNFRNIQVDEAN targeted proteosomal degradation of sub- LLTWQGLIVPDNPPYDKGAFRIEINFPAEYPFKPP strate proteins. Three classes of enzymes Quantity: 20 µg KITFKTKIYHPNIDEKGQVCLPVISAENWKPATK are involved in the process of ubiquityla- TDQVIQSLIALVNDPQPEHPLRADLAEEYSKDRK tion; activating enzymes (E1s), conjugat- Concentration: 1 mg/ml KFCKNAEEFTKKYGEKRPVD ing enzymes (E2s) and protein ligases (E3s). UBE2L3 is a member of the E2 con- Formulation: 50 mM HEPES pH 7.5, Tag (bold text): N-terminal His jugating enzyme family and cloning of the 150 mM sodium chloride, 2 mM Protease cleavage site: PreScission™ (LEVLFQtGP) human gene was first described by Moyni- dithiothreitol, 10% glycerol UBE2L3 (regular text): Start bold italics (amino acid han et al. (1996). Human UBE2L3 has residues 1-154) Accession number: AAH53368 been mapped to chromosome 22q11.2- Molecular Weight: ~20 kDa q13.1 and shares 97% homology with its mouse homologue (Moynihan et al., Purity: >85% by InstantBlue™ SDS-PAGE 1996; Moynihan et al., 1998). UBE2L3 efficiently mediates the ubiquitylation of Stability/Storage: 12 months at -70˚C; E6AP (Nuber et al., 1996). A protein com- aliquot as required plex comprising UBE2L3, the E3 ligase Parkin and alpha synuclein (alpha-Sp22) has been identified in which the substrate Quality Assurance alpha-Sp22 becomes polyubiquitylated in normal human brains and targeted Purity: Protein Identification: for degradation. -
Substrate Specificity and Regulation of Nedd4 Proteins
SUBSTRATE SPECIFICITY AND REGULATION OF NEDD4 PROTEINS by Mary Christine Bruce A thesis submitted in conformity with the requirements for the Degree of Doctor of Philosophy Graduate Department of Biochemistry University of Toronto © Copyright by Mary Christine Bruce 2009 Substrate Specificity and Regulation of Nedd4 proteins Doctor of Philosophy, 2009 Mary Christine Bruce, Department of Biochemistry, University of Toronto Abstract Nedd4-1 and Nedd4-2 are closely related E3 ubiquitin protein ligases that contain a C2 domain, 3-4 WW domains, and a catalytic ubiquitin ligase HECT domain. The WW domains of Nedd4 proteins recognize substrates for ubiquitination by binding the sequence L/PPxY (the PY-motif) found in target proteins. Nedd4-2 functions as a suppressor of the epithelial Na+ channel (ENaC), which interacts with Nedd4-2 WW domains via PY-motifs located at its C-terminus. The importance of Nedd4-2 mediated ENaC regulation is highlighted by the fact that mutations affecting the ENaC PY-motifs cause Liddle syndrome, a hereditary hypertension. Since all Nedd4 family members recognize the same core sequence in their target proteins, the question was raised of how substrate specificity for Nedd4 family members is achieved. Using intrinsic tryptophan florescence to measure the binding affinity of Nedd4-1/-2 WW domains for their substrate PY-motifs, we demonstrate the importance of both PY-motif and WW domain residues, outside the core binding residues, in determining the specificity of WW domain-ligand interactions. Little was known about regulation of catalytic activity for this family of E3 ligases, and hence was the second focus of my work. -
Anti-SMURF 2 Antibody Catalog # ABO12778
10320 Camino Santa Fe, Suite G San Diego, CA 92121 Tel: 858.875.1900 Fax: 858.622.0609 Anti-SMURF 2 Antibody Catalog # ABO12778 Specification Anti-SMURF 2 Antibody - Product Information Application WB Primary Accession Q9HAU4 Host Rabbit Reactivity Human Clonality Polyclonal Format Lyophilized Description Rabbit IgG polyclonal antibody for E3 ubiquitin-protein ligase SMURF2(SMURF2) detection. Tested with WB in Human. Reconstitution Add 0.2ml of distilled water will yield a concentration of 500ug/ml. Western blot analysis of SMURF2 expression Anti-SMURF 2 Antibody - Additional Information in SMMC whole cell lysates (lane 1). SMURF2 at 86KD was detected using rabbit anti- SMURF2 Antigen Affinity purified polyclonal Gene ID 64750 antibody (Catalog # ABO12778) at0.5 ??g/mL. The blot was developed using Other Names chemiluminescence (ECL) method . E3 ubiquitin-protein ligase SMURF2, hSMURF2, 2.3.2.26, HECT-type E3 ubiquitin transferase SMURF2, SMAD ubiquitination regulatory factor 2, SMAD-specific E3 Anti-SMURF 2 Antibody - Background ubiquitin-protein ligase 2, SMURF2 E3 ubiquitin-protein ligase SMURF2 is an Calculated MW enzyme that in humans is encoded by the 86196 MW KDa SMURF2 gene. The SMURF2 gene is mapped to chromosome 17q22-q23 based on sequence Application Details similarity between the SMURF2 sequence and Western blot, 0.1-0.5 µg/ml, Human<br> a genomic contig. SMURF2 is a HECT domain E3 ubiquitin ligase involved in degradation of Subcellular Localization SMADs, TGF-beta receptor (TGFBR), and other Nucleus . Cytoplasm . Cell membrane . substrates. It also functions in regulation of Membrane raft . Cytoplasmic in the neuronal and planar cell polarity, induction of presence of SMAD7. -
Q 297 Suppl USE
The following supplement accompanies the article Atlantic salmon raised with diets low in long-chain polyunsaturated n-3 fatty acids in freshwater have a Mycoplasma dominated gut microbiota at sea Yang Jin, Inga Leena Angell, Simen Rød Sandve, Lars Gustav Snipen, Yngvar Olsen, Knut Rudi* *Corresponding author: [email protected] Aquaculture Environment Interactions 11: 31–39 (2019) Table S1. Composition of high- and low LC-PUFA diets. Stage Fresh water Sea water Feed type High LC-PUFA Low LC-PUFA Fish oil Initial fish weight (g) 0.2 0.4 1 5 15 30 50 0.2 0.4 1 5 15 30 50 80 200 Feed size (mm) 0.6 0.9 1.3 1.7 2.2 2.8 3.5 0.6 0.9 1.3 1.7 2.2 2.8 3.5 3.5 4.9 North Atlantic fishmeal (%) 41 40 40 40 40 30 30 41 40 40 40 40 30 30 35 25 Plant meals (%) 46 45 45 42 40 49 48 46 45 45 42 40 49 48 39 46 Additives (%) 3.3 3.2 3.2 3.5 3.3 3.4 3.9 3.3 3.2 3.2 3.5 3.3 3.4 3.9 2.6 3.3 North Atlantic fish oil (%) 9.9 12 12 15 16 17 18 0 0 0 0 0 1.2 1.2 23 26 Linseed oil (%) 0 0 0 0 0 0 0 6.8 8.1 8.1 9.7 11 10 11 0 0 Palm oil (%) 0 0 0 0 0 0 0 3.2 3.8 3.8 5.4 5.9 5.8 5.9 0 0 Protein (%) 56 55 55 51 49 47 47 56 55 55 51 49 47 47 44 41 Fat (%) 16 18 18 21 22 22 22 16 18 18 21 22 22 22 28 31 EPA+DHA (% diet) 2.2 2.4 2.4 2.9 3.1 3.1 3.1 0.7 0.7 0.7 0.7 0.7 0.7 0.7 4 4.2 Table S2.