Toxicological Profile for Benzidine
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The Aryl Hydrocarbon Receptor: Structural Analysis and Activation Mechanisms
The Aryl Hydrocarbon Receptor: Structural Analysis and Activation Mechanisms This thesis is submitted in fulfilment of the requirements for the degree of Doctor of Philosophy in the School of Molecular and Biomedical Sciences (Biochemistry), The University of Adelaide, Australia Fiona Whelan, B.Sc. (Hons) 2009 2 Table of Contents THESIS SUMMARY................................................................................. 6 DECLARATION....................................................................................... 7 PUBLICATIONS ARISING FROM THIS THESIS.................................... 8 ACKNOWLEDGEMENTS...................................................................... 10 ABBREVIATIONS ................................................................................. 12 CHAPTER 1: INTRODUCTION ............................................................. 17 1.1 BHLH.PAS PROTEINS ............................................................................................17 1.1.1 General background..................................................................................17 1.1.2 bHLH.PAS Class I Proteins.........................................................................18 1.2 THE ARYL HYDROCARBON RECEPTOR......................................................................19 1.2.1 Domain Structure and Ligand Activation ..............................................19 1.2.2 AhR Expression and Developmental Activity .......................................21 1.2.3 Mouse AhR Knockout Phenotype ...........................................................23 -
Non-Homologous Isofunctional Enzymes: a Systematic Analysis Of
Omelchenko et al. Biology Direct 2010, 5:31 http://www.biology-direct.com/content/5/1/31 RESEARCH Open Access Non-homologousResearch isofunctional enzymes: A systematic analysis of alternative solutions in enzyme evolution Marina V Omelchenko, Michael Y Galperin*, Yuri I Wolf and Eugene V Koonin Abstract Background: Evolutionarily unrelated proteins that catalyze the same biochemical reactions are often referred to as analogous - as opposed to homologous - enzymes. The existence of numerous alternative, non-homologous enzyme isoforms presents an interesting evolutionary problem; it also complicates genome-based reconstruction of the metabolic pathways in a variety of organisms. In 1998, a systematic search for analogous enzymes resulted in the identification of 105 Enzyme Commission (EC) numbers that included two or more proteins without detectable sequence similarity to each other, including 34 EC nodes where proteins were known (or predicted) to have distinct structural folds, indicating independent evolutionary origins. In the past 12 years, many putative non-homologous isofunctional enzymes were identified in newly sequenced genomes. In addition, efforts in structural genomics resulted in a vastly improved structural coverage of proteomes, providing for definitive assessment of (non)homologous relationships between proteins. Results: We report the results of a comprehensive search for non-homologous isofunctional enzymes (NISE) that yielded 185 EC nodes with two or more experimentally characterized - or predicted - structurally unrelated proteins. Of these NISE sets, only 74 were from the original 1998 list. Structural assignments of the NISE show over-representation of proteins with the TIM barrel fold and the nucleotide-binding Rossmann fold. From the functional perspective, the set of NISE is enriched in hydrolases, particularly carbohydrate hydrolases, and in enzymes involved in defense against oxidative stress. -
Preparation Andspectral Studies of Cr(III), Fe(II) Chelates of Schiff Bases Derived from Benzidine and 2-Nitrobenzaldehyde
IOSR Journal of Applied Chemistry (IOSR-JAC) e-ISSN: 2278-5736.Volume 13, Issue 3 Ser. II (March. 2020), PP 29-35 www.iosrjournals.org Preparation andSpectral Studies of Cr(III), Fe(II) Chelates of Schiff bases Derived from Benzidine and 2-Nitrobenzaldehyde Younis. O.Ben Amer*, Rehab. N. El-daghare, Halima F. Salem, Ahmed N. Hammouda,Rashd. M. El-Ferjani &Fatin M. Elmagbari Chemistry Department, Faculty of Science, Benghazi University, Benghazi, Libya Corresponding author: Younis. O.Ben Amer Abstract In this paper, we report the synthesis andcharacterisation of Bis(2-nitroBenzylidene)benzidine Schiff base was prepared by the reaction of benzidine and2-nitrobenzaldehyde 1:2 reaction. This ligand was used to form two chelates with Cr3+ and Fe2+ ions. The prepared compounds were analysed using elemental analysis, IR spectroscopy, 1H-NMR and mass spectroscopy. The obtained results confirmed the formation of proposed compounds,including the free ligand and the two chelates and were found in a good agreement with theoretical values. Keywords: Schiff base; complexes; spectroscopy; 2-Nitrobenzaldehyde. ----------------------------------------------------------------------------------------------------------------------------- ---------- Date of Submission: 09-03-2020 Date of Acceptance: 23-03-2020 ----------------------------------------------------------------------------------------------------------------------------- ---------- I. Introduction Many variously shaped polydentate chelating ligands have been prepared in the past and successfully -
Biosynthesis in Vitro of Bacillamide Intermediate-Heterocyclic Alacysthiazole by Heterologous Expression of Nonribosomal Peptide Synthetase (NRPS) T
Journal of Biotechnology 292 (2019) 5–11 Contents lists available at ScienceDirect Journal of Biotechnology journal homepage: www.elsevier.com/locate/jbiotec Biosynthesis in vitro of bacillamide intermediate-heterocyclic AlaCysthiazole by heterologous expression of nonribosomal peptide synthetase (NRPS) T Fengli Zhang, Nayila Mulati, Yukun Wang, Yingxin Li, Sanqiang Gong, Loganathan Karthik, ⁎ Wei Sun, Zhiyong Li Marine Biotechnology Laboratory, State Key Laboratory of Microbial Metabolism and School of Life Sciences & Biotechnology, Shanghai Jiao Tong University, Shanghai, China ARTICLE INFO ABSTRACT Keywords: Bacillamide C, a potential natural antialgae active compound, is produced by Bacillus atrophaeus C89 derived Bacillus atrophaeus from marine sponge Dysidea avara. A nonribosomal peptide synthetase (NRPS) cluster is hypothesized to be Bacillamides involved in the biosynthesis of bacillamide C. The NRPS with a domain string of A1-PCP1-Cy-A2-PCP2-C can be Heterologous expression divided into three functional modules. After heterologous expression and purification of module A1-PCP1 and Nonribosomal peptide synthetase (NRPS) module Cy-A2-PCP2, their catalytic activities were biochemically proven in vitro by the reaction with the apo- Thiazole PCP domain transformed to the holo-PCP domain through a phosphopantetheinyl transferase, ATP, and substrate amino acids. Five– membered heterocyclic AlaCysthiazole with molecular weight of 172.0389 was detected. This proved the formation of the heterocyclic dipeptide AlaCysthiazole, which is considered to be a building block for the biosynthesis of bacillamide. This study provides a basis for further biosynthesis of bacillamides. 1. Introduction et al., 2017). Even though the biosynthesis of bacillamide C was opti- mized, the yield was very low (Jin et al., 2011; Yu et al., 2015). -
Benzidine and Dyes Metabolized Cells
Report on Carcinogens, Fourteenth Edition For Table of Contents, see home page: http://ntp.niehs.nih.gov/go/roc Benzidine and Dyes Metabolized cells. It also caused many other types of genetic damage in various to Benzidine test systems, including yeast, cultured human and other mamma- lian cells, and rodents exposed in vivo. The damage included mitotic Introduction gene conversion (in yeast), micronucleus formation, DNA strand breaks, unscheduled DNA synthesis, cell transformation, chromo- Benzidine was first listed in theFirst Annual Report on Carcinogens somal aberrations, sister chromatid exchange, and aneuploidy (IARC (1980), and dyes metabolized to benzidine were first listed as a class 1987). Workers exposed to benzidine and or benzidine-based dyes in the Ninth Report on Carcinogens (2000). The profiles for benzidine had higher levels of chromosomal aberrations in their white bloods and dyes metabolized to benzidine, which are listed (separately) as cells than did unexposed workers (Choudhary 1996). known to be human carcinogens, follow this introduction. Properties Benzidine Benzidine is a biphenyl amine that exists at room temperature as a white to slightly reddish crystalline powder (ATSDR 2001). It is CAS No. 92-87-5 slightly soluble in cold water, more soluble in hot water, and read- ily soluble in less-polar solvents, such as diethyl ether and ethanol. Known to be a human carcinogen It darkens on exposure to air and light (Akron 2009). Physical and First listed in the First Annual Report on Carcinogens (1980) chemical properties of benzidine are listed in the following table. Also known as 4,4′-diaminobiphenyl Property Information Molecular weight 184.2a Specific gravity 1.250 at 20°C/4°Ca H2N NH2 Melting point 120°Ca Boiling point 401°Ca Log K 1.34a Carcinogenicity ow Water solubility 0.322 g/L at 25°Ca Benzidine is known to be a human carcinogen based on sufficient ev- Vapor pressure 8.98 × 10–7 mm Hg at 25°Cb idence of carcinogenicity from studies in humans. -
The Microbiota-Produced N-Formyl Peptide Fmlf Promotes Obesity-Induced Glucose
Page 1 of 230 Diabetes Title: The microbiota-produced N-formyl peptide fMLF promotes obesity-induced glucose intolerance Joshua Wollam1, Matthew Riopel1, Yong-Jiang Xu1,2, Andrew M. F. Johnson1, Jachelle M. Ofrecio1, Wei Ying1, Dalila El Ouarrat1, Luisa S. Chan3, Andrew W. Han3, Nadir A. Mahmood3, Caitlin N. Ryan3, Yun Sok Lee1, Jeramie D. Watrous1,2, Mahendra D. Chordia4, Dongfeng Pan4, Mohit Jain1,2, Jerrold M. Olefsky1 * Affiliations: 1 Division of Endocrinology & Metabolism, Department of Medicine, University of California, San Diego, La Jolla, California, USA. 2 Department of Pharmacology, University of California, San Diego, La Jolla, California, USA. 3 Second Genome, Inc., South San Francisco, California, USA. 4 Department of Radiology and Medical Imaging, University of Virginia, Charlottesville, VA, USA. * Correspondence to: 858-534-2230, [email protected] Word Count: 4749 Figures: 6 Supplemental Figures: 11 Supplemental Tables: 5 1 Diabetes Publish Ahead of Print, published online April 22, 2019 Diabetes Page 2 of 230 ABSTRACT The composition of the gastrointestinal (GI) microbiota and associated metabolites changes dramatically with diet and the development of obesity. Although many correlations have been described, specific mechanistic links between these changes and glucose homeostasis remain to be defined. Here we show that blood and intestinal levels of the microbiota-produced N-formyl peptide, formyl-methionyl-leucyl-phenylalanine (fMLF), are elevated in high fat diet (HFD)- induced obese mice. Genetic or pharmacological inhibition of the N-formyl peptide receptor Fpr1 leads to increased insulin levels and improved glucose tolerance, dependent upon glucagon- like peptide-1 (GLP-1). Obese Fpr1-knockout (Fpr1-KO) mice also display an altered microbiome, exemplifying the dynamic relationship between host metabolism and microbiota. -
Benzidine-Based Chemical Substances
Environmental Protection Agency § 721.1660 (b), (c), and (k) are applicable to manu- the significant new uses described in facturers, importers, and processors of paragraph (a)(2) of this section. this substance. (2) The significant new uses are any (2) Limitations or revocation of certain use other than as a reagent to test for notification requirements. The provisions hydrogen peroxide in milk; a reagent of § 721.185 apply to this section. to test for hydrogen sulfate, hydrogen [65 FR 367, Jan. 5, 2000] cyanide, and nicotine; a stain in mi- croscopy; a reagent for detecting blood; § 721.1660 Benzidine-based chemical an analytical standard; and also for substances. Colour Index (C.I.) Direct Red 28 (a) Chemical substances and significant (Congo Red, CAS No. 573-58-0) as an in- new uses subject to reporting. (1) The dicator dye. benzidine-based chemical substances (b) List of substances. The following listed in table 1 of this section are sub- table 1 lists the benzidine-based chem- ject to reporting under this section for ical substances covered by this section. TABLE 1—BENZIDINE-BASED CHEMICAL SUBSTANCES CAS number C.I. name C.I. number Chemical Name 92–87–5 Benzidine 0N/A [1,1′-Biphenyl]-4,4′-diamine 531–85–1 Benzidine · 2HCL N/A [1,1′-Biphenyl]-4,4′-diamine, dihydrochloride 573–58–0 C.I. Direct Red 28 22120 1- Naphthalenesulfonic acid, 3,3′-[[1,1′-biphenyl]-4,4′-diylbis(azo)]bis[4- amino-, disodium salt 1937–37–7 C.I. Direct Black 38 30235 2,7-Naphthalenedisulfonic acid, 4-amino-3-[[4′-[(2, 4- diaminophenyl)azo][1,1′-biphenyl]-4-yl]azo]-5-hydroxy-6-(phenylazo)-, disodium salt 2302–97–8 C.I. -
Harmonization Project Document No. 4
This report contains the collective views of an international group of experts and does not necessarily represent the decisions or the stated policy of the World Health Organization, the International Labour Organization, or the United Nations Environment Programme. Harmonization Project Document No. 4 PART 1: IPCS FRAMEWORK FOR ANALYSING THE RELEVANCE OF A CANCER MODE OF ACTION FOR HUMANS AND CASE-STUDIES PART 2: IPCS FRAMEWORK FOR ANALYSING THE RELEVANCE OF A NON-CANCER MODE OF ACTION FOR HUMANS This project was conducted within the IPCS project on the Harmonization of Approaches to the Assessment of Risk from Exposure to Chemicals. Published under the joint sponsorship of the World Health Organization, the International Labour Organization, and the United Nations Environment Programme, and produced within the framework of the Inter-Organization Programme for the Sound Management of Chemicals. The International Programme on Chemical Safety (IPCS), established in 1980, is a joint venture of the United Nations Environment Programme (UNEP), the International Labour Organization (ILO), and the World Health Organization (WHO). The overall objectives of the IPCS are to establish the scientific basis for assessment of the risk to human health and the environment from exposure to chemicals, through international peer review processes, as a prerequisite for the promotion of chemical safety, and to provide technical assistance in strengthening national capacities for the sound management of chemicals. The Inter-Organization Programme for the Sound Management of Chemicals (IOMC) was established in 1995 by UNEP, ILO, the Food and Agriculture Organization of the United Nations, WHO, the United Nations Industrial Development Organization, the United Nations Institute for Training and Research, and the Organisation for Economic Co-operation and Development (Participating Organizations), following recommendations made by the 1992 UN Conference on Environment and Development to strengthen cooperation and increase coordination in the field of chemical safety. -
Generate Metabolic Map Poster
Authors: Pallavi Subhraveti Ron Caspi Peter Midford Peter D Karp An online version of this diagram is available at BioCyc.org. Biosynthetic pathways are positioned in the left of the cytoplasm, degradative pathways on the right, and reactions not assigned to any pathway are in the far right of the cytoplasm. Transporters and membrane proteins are shown on the membrane. Ingrid Keseler Periplasmic (where appropriate) and extracellular reactions and proteins may also be shown. Pathways are colored according to their cellular function. Gcf_003855395Cyc: Shewanella livingstonensis LMG 19866 Cellular Overview Connections between pathways are omitted for legibility. -
Maine Remedial Action Guidelines (Rags) for Contaminated Sites
Maine Department of Environmental Protection Remedial Action Guidelines for Contaminated Sites (RAGs) Effective Date: May 1, 2021 Approved by: ___________________________ Date: April 27, 2021 David Burns, Director Bureau of Remediation & Waste Management Executive Summary MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION 17 State House Station | Augusta, Maine 04333-0017 www.maine.gov/dep Maine Department of Environmental Protection Remedial Action Guidelines for Contaminated Sites Contents 1 Disclaimer ...................................................................................................................... 1 2 Introduction and Purpose ............................................................................................... 1 2.1 Purpose ......................................................................................................................................... 1 2.2 Consistency with Superfund Risk Assessment .............................................................................. 1 2.3 When to Use RAGs and When to Develop a Site-Specific Risk Assessment ................................. 1 3 Applicability ................................................................................................................... 2 3.1 Applicable Programs & DEP Approval Process ............................................................................. 2 3.1.1 Uncontrolled Hazardous Substance Sites ............................................................................. 2 3.1.2 Voluntary Response Action Program -
The Hazard of Benzidine to Criminal Justice Personnel
NBS Ref Publi cations The Hazard of ubiication Benzidine to 0-21 "in„l 2i;rcati of Standards Criminal Justice A111Q3 mi717 Personnel nmr 19087G QC\0O 051 Law Enforcement Equipment Technology U.S. DEPARTMENT OF COMMERCE National Bureau of Standards h80-21 7 JUN 1 4 1977 BS Special The Hazard of tiJf : publication Benzidine to loa "^^^ 21 Criminal Justice a, Personnel '^^^ by Harold Steinberg Center for Consumer Product Technology National Bureau of Standards Washington, D.C. 20234 prepared by Law Enforcement Standards Laboratory Center for Consumer Product Technology National Bureau of Standards Washington, D.C. 20234 prepared for National Institute of Law Enforcement and Criminal Justice Law Enforcement Assistance Administration U.S. Department of Justice Washington, D. C. 20531 U.S. DEPARTMENT OF COMMERCE, Juanita M. Kreps, Secretary Sidney Harman, Under Secretary Issued May 1 977 NATIONAL BUREAU OF STANDARDS, Ernest Ambler, Acting Director Library of Congress Cataloging in Publication Data Steinberg, Harold, 1934- The hazard of benzidine to criminal justice personnel. (Law enforcement equipment technology) (NBS special publica- tion ; 480-21) Supt. of Docs. no. : €13.10:480-21. 1. Benzidine. 2. Criminal justice personnel— Diseases and hygiene. 3. Carcinogenesis. 4. Forensic hematology. L Law Enforce- ment Standards Laboratory. IL National Institute of Law Enforce- ment and Criminal Justice. IIL Title. IV. Series. V. Series: United States. National Bureau of Standards. Special publication ; 480-21. QC100.U57 no. 480-21 602Ms [364.12'5] 77-608086 National Bureau of Standards Special Publication 480-21 Nat. Bur. Stand. (U.S.), Spec. Publ. 480-21, 16 pages CODEN:XNBSAV U.S. -
Auxiliary Table 2 Proteomics.Xlsx
Gene names log2(fold-Change) -Log(p-value) Significant Protein IDs Majority protein IDs Protein names gatZ -3.515 2.827 + P0C8J8;P0C8K0 P0C8J8 D-tagatose-1,6-bisphosphate aldolase subunit GatZ dps -3.362 4.596 + P0ABT2 P0ABT2 DNA protection during starvation protein sstT -3.219 3.423 + P0AGE4 P0AGE4 Ser/Thr transporter SstT iraP -3.074 3.623 + P0AAN9 P0AAN9 Anti-adapter protein IraP ilvC -3.054 3.692 + P05793 P05793 Ketol-acid reductoisomerase rfbB -3.006 4.290 + P37759 P37759 dTDP-glucose 4,6-dehydratase 1 gdhA -2.847 5.732 + P00370 P00370 NADP-specific glutamate dehydrogenase rstA -2.796 3.542 + P52108 P52108 Transcriptional regulatory protein RstA ompT -2.790 4.251 + P09169 P09169 Protease 7 uspF -2.719 4.817 + P37903 P37903 Universal stress protein F crl -2.649 4.248 + P24251 P24251 σ factor-binding protein Crl yncE -2.514 1.994 + P76116 P76116 Uncharacterized protein YncE yiiS -2.507 4.223 + P32162 P32162 UPF0381 protein YiiS yagU -2.494 2.430 + P0AAA1 P0AAA1 Inner membrane protein YagU stpA -2.488 3.540 + P0ACG1 P0ACG1 DNA-binding protein StpA ydgJ -2.476 3.366 + P77376 P77376 Uncharacterized oxidoreductase YdgJ kgtP -2.462 2.665 + P0AEX3 P0AEX3 α-ketoglutarate permease sodB -2.436 3.704 + P0AGD3 P0AGD3 Superoxide dismutase [Fe] purT -2.386 2.851 + P33221 P33221 Phosphoribosylglycinamide formyltransferase 2 trpA -2.371 3.261 + P0A877 P0A877 Trp synthase α chain acnB -2.319 2.707 + P36683 P36683 Aconitate hydratase B iadA -2.316 4.127 + P39377 P39377 Isoaspartyl dipeptidase modF -2.244 2.107 + P31060 P31060 Putative molybdenum transport