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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_000702065Cyc: Kandleria vitulina DSM 20405 Cellular Overview Connections between pathways are omitted for legibility.

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Bacteria Belonging to Pseudomonas Typographi Sp. Nov. from the Bark Beetle Ips Typographus Have Genomic Potential to Aid in the Host Ecology
insects Article Bacteria Belonging to Pseudomonas typographi sp. nov. from the Bark Beetle Ips typographus Have Genomic Potential to Aid in the Host Ecology Ezequiel Peral-Aranega 1,2 , Zaki Saati-Santamaría 1,2 , Miroslav Kolaˇrik 3,4, Raúl Rivas 1,2,5 and Paula García-Fraile 1,2,4,5,* 1 Microbiology and Genetics Department, University of Salamanca, 37007 Salamanca, Spain; [email protected] (E.P.-A.); [email protected] (Z.S.-S.); [email protected] (R.R.) 2 Spanish-Portuguese Institute for Agricultural Research (CIALE), 37185 Salamanca, Spain 3 Department of Botany, Faculty of Science, Charles University, Benátská 2, 128 01 Prague, Czech Republic; [email protected] 4 Laboratory of Fungal Genetics and Metabolism, Institute of Microbiology of the Academy of Sciences of the Czech Republic, 142 20 Prague, Czech Republic 5 Associated Research Unit of Plant-Microorganism Interaction, University of Salamanca-IRNASA-CSIC, 37008 Salamanca, Spain * Correspondence: [email protected] Received: 4 July 2020; Accepted: 1 September 2020; Published: 3 September 2020 Simple Summary: European Bark Beetle (Ips typographus) is a pest that affects dead and weakened spruce trees. Under certain environmental conditions, it has massive outbreaks, resulting in attacks of healthy trees, becoming a forest pest. It has been proposed that the bark beetle’s microbiome plays a key role in the insect’s ecology, providing nutrients, inhibiting pathogens, and degrading tree defense compounds, among other probable traits. During a study of bacterial associates from I. typographus, we isolated three strains identified as Pseudomonas from different beetle life stages. In this work, we aimed to reveal the taxonomic status of these bacterial strains and to sequence and annotate their genomes to mine possible traits related to a role within the bark beetle holobiont.
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Stereoselective Synthesis of a 4- -Glucoside of Valienamine and Its X
www.nature.com/scientificreports OPEN Stereoselective synthesis of a 4‑⍺‑glucoside of valienamine and its X‑ray structure in complex with Streptomyces coelicolor GlgE1‑V279S Anshupriya Si1,4, Thilina D. Jayasinghe2,4, Radhika Thanvi1, Sunayana Kapil3, Donald R. Ronning2* & Steven J. Sucheck1* Glycoside hydrolases (GH) are a large family of hydrolytic enzymes found in all domains of life. As such, they control a plethora of normal and pathogenic biological functions. Thus, understanding selective inhibition of GH enzymes at the atomic level can lead to the identifcation of new classes of therapeutics. In these studies, we identifed a 4‑⍺‑glucoside of valienamine (8) as an inhibitor of Streptomyces coelicolor (Sco) GlgE1‑V279S which belongs to the GH13 Carbohydrate Active EnZyme family. The results obtained from the dose–response experiments show that 8 at a concentration of 1000 µM reduced the enzyme activity of Sco GlgE1‑V279S by 65%. The synthetic route to 8 and a closely related 4‑⍺‑glucoside of validamine (7) was achieved starting from readily available D‑maltose. A key step in the synthesis was a chelation‑controlled addition of vinylmagnesium bromide to a maltose‑derived enone intermediate. X‑ray structures of both 7 and 8 in complex with Sco GlgE1‑ V279S were solved to resolutions of 1.75 and 1.83 Å, respectively. Structural analysis revealed the valienamine derivative 8 binds the enzyme in an E2 conformation for the cyclohexene fragment. Also, the cyclohexene fragment shows a new hydrogen‑bonding contact from the pseudo‑diaxial C(3)–OH to the catalytic nucleophile Asp 394 at the enzyme active site.
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| Hai Lui a Un Acutul Luniit Moonhiti
|HAI LUI AUN ACUTULUS010006055B2 LUNIIT MOONHITI (12 ) United States Patent (10 ) Patent No. : US 10 , 006 , 055 B2 Burk et al. (45 ) Date of Patent: Jun . 26 , 2018 ( 54 ) MICROORGANISMS FOR PRODUCING 2002/ 0168654 A1 11/ 2002 Maranas et al. 2003 / 0059792 Al 3 /2003 Palsson et al . BUTADIENE AND METHODS RELATED 2003 /0087381 A1 5 / 2003 Gokarn THERETO 2003 / 0224363 Al 12 /2003 Park et al . 2003 / 0233218 Al 12 /2003 Schilling (71 ) Applicant: Genomatica , Inc. , San Diego , CA (US ) 2004 / 0009466 AL 1 /2004 Maranas et al. 2004 / 0029149 Al 2 /2004 Palsson et al. ( 72 ) Inventors : Mark J . Burk , San Diego , CA (US ) ; 2004 / 0072723 A1 4 /2004 Palsson et al. Anthony P . Burgard , Bellefonte , PA 2004 / 0152159 Al 8 / 2004 Causey et al . 2005 /0042736 A1 2 / 2005 San et al . (US ) ; Robin E . Osterhout , San Diego , 2005 / 0079482 A1 4 / 2005 Maranas et al . CA (US ) ; Jun Sun , San Diego , CA 2006 / 0046288 Al 3 / 2006 Ka - Yiu et al. ( US ) ; Priti Pharkya , San Diego , CA 2006 / 0073577 A1 4 / 2006 Ka - Yiu et al . (US ) 2007 /0184539 Al 8 / 2007 San et al . 2009 / 0047718 Al 2 / 2009 Blaschek et al . 2009 / 0047719 Al 2 / 2009 Burgard et al . (73 ) Assignee : Genomatica , Inc ., San Diego , CA (US ) 2009 /0191593 A1 7 / 2009 Burk et al . 2010 / 0003716 A1 1 / 2010 Cervin et al. ( * ) Notice : Subject to any disclaimer , the term of this 2010 /0184171 Al 7 /2010 Jantama et al. patent is extended or adjusted under 35 2010 /0304453 Al 12 / 2010 Trawick et al .
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(12) Patent Application Publication (10) Pub. No.: US 2014/0155567 A1 Burk Et Al
US 2014O155567A1 (19) United States (12) Patent Application Publication (10) Pub. No.: US 2014/0155567 A1 Burk et al. (43) Pub. Date: Jun. 5, 2014 (54) MICROORGANISMS AND METHODS FOR (60) Provisional application No. 61/331,812, filed on May THE BIOSYNTHESIS OF BUTADENE 5, 2010. (71) Applicant: Genomatica, Inc., San Diego, CA (US) Publication Classification (72) Inventors: Mark J. Burk, San Diego, CA (US); (51) Int. Cl. Anthony P. Burgard, Bellefonte, PA CI2P 5/02 (2006.01) (US); Jun Sun, San Diego, CA (US); CSF 36/06 (2006.01) Robin E. Osterhout, San Diego, CA CD7C II/6 (2006.01) (US); Priti Pharkya, San Diego, CA (52) U.S. Cl. (US) CPC ................. CI2P5/026 (2013.01); C07C II/I6 (2013.01); C08F 136/06 (2013.01) (73) Assignee: Genomatica, Inc., San Diego, CA (US) USPC ... 526/335; 435/252.3:435/167; 435/254.2: (21) Appl. No.: 14/059,131 435/254.11: 435/252.33: 435/254.21:585/16 (22) Filed: Oct. 21, 2013 (57) ABSTRACT O O The invention provides non-naturally occurring microbial Related U.S. Application Data organisms having a butadiene pathway. The invention addi (63) Continuation of application No. 13/101,046, filed on tionally provides methods of using Such organisms to produce May 4, 2011, now Pat. No. 8,580,543. butadiene. Patent Application Publication Jun. 5, 2014 Sheet 1 of 4 US 2014/O155567 A1 ?ueudos!SMS |?un61– Patent Application Publication Jun. 5, 2014 Sheet 2 of 4 US 2014/O155567 A1 VOJ OO O Z?un61– Patent Application Publication US 2014/O155567 A1 {}}} Hººso Patent Application Publication Jun.
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Generate Metabolic Map Poster
Authors: Peter D. Karp Suzanne Paley Julio Collado-Vides John L Ingraham Ingrid Keseler Markus Krummenacker Cesar Bonavides-Martinez Robert Gunsalus 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. Carol Fulcher Ian Paulsen Socorro Gama-Castro Robert LaRossa Periplasmic (where appropriate) and extracellular reactions and proteins may also be shown. Pathways are colored according to their cellular function. EcoCyc: Escherichia coli K-12 substr. MG1655 Cellular Overview Connections between pathways are omitted for legibility. Anamika Kothari Amanda Mackie Alberto Santos-Zavaleta succinate phosphate succinate N-acetyl-DL-methionine + L-ornithine glutathione + L-methionine S-oxide D-fructofuranose γ Ag+ molybdate ferroheme b L,L-homocystine asp lys cys L-alanyl- -D- D-mannopyranose 6-phosphate 2+ 2+ H D-methionine 2-deoxy-D-glucose succinate formate formate succinate D-tartrate putrescine agmatine cadaverine L-tartrate D-fructofuranose 6-phosphate + nitrate nitrate Cu thiosulfate deoxycholate L,L-homocystine D-cystine D-cycloserine methyl β-D-glucoside putrescine asp spermidine (S)-2-hydroxybutanoate (S)-2-hydroxybutanoate arg L-homoserine lactone magnesium hydrogenphosphate magnesium hydrogenphosphate antimonous acid glutamyl-meso- Co2+ Cd2+ lactulose poly-β-1,6- met cob(I)inamide 2,3-dioxo-
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Towards the molecular understanding of glycogen elongation by amylosucrase. Cécile Albenne, Lars K Skov, Vinh Tran, Michael Gajhede, Pierre Monsan, Magali Remaud Simeon, Gwenaëlle André-Leroux To cite this version: Cécile Albenne, Lars K Skov, Vinh Tran, Michael Gajhede, Pierre Monsan, et al.. Towards the molecular understanding of glycogen elongation by amylosucrase.. Proteins - Structure, Function and Bioinformatics, Wiley, 2007, 66 (1), pp.118-26. 10.1002/prot.21083. hal-02663870 HAL Id: hal-02663870 https://hal.inrae.fr/hal-02663870 Submitted on 31 May 2020 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Distributed under a Creative Commons Attribution - ShareAlike| 4.0 International License PROTEINS: Structure, Function, and Bioinformatics 66:118–126 (2007) Towards the Molecular Understanding of Glycogen Elongation by Amylosucrase Cećile Albenne,1 Lars K. Skov,2 Vinh Tran,3 Michael Gajhede,2 Pierre Monsan,4 Magali Remaud-Simeón,4* and Gweńae¨lle Andre´-Leroux5 1Laboratoire Surfaces Cellulaires et Signalisation chez les Ve´ge´taux, UMR 5546
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Flavonoid Glucodiversification with Engineered Sucrose-Active Enzymes Yannick Malbert
Flavonoid glucodiversification with engineered sucrose-active enzymes Yannick Malbert To cite this version: Yannick Malbert. Flavonoid glucodiversification with engineered sucrose-active enzymes. Biotechnol- ogy. INSA de Toulouse, 2014. English. NNT : 2014ISAT0038. tel-01219406 HAL Id: tel-01219406 https://tel.archives-ouvertes.fr/tel-01219406 Submitted on 22 Oct 2015 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Last name: MALBERT First name: Yannick Title: Flavonoid glucodiversification with engineered sucrose-active enzymes Speciality: Ecological, Veterinary, Agronomic Sciences and Bioengineering, Field: Enzymatic and microbial engineering. Year: 2014 Number of pages: 257 Flavonoid glycosides are natural plant secondary metabolites exhibiting many physicochemical and biological properties. Glycosylation usually improves flavonoid solubility but access to flavonoid glycosides is limited by their low production levels in plants. In this thesis work, the focus was placed on the development of new glucodiversification routes of natural flavonoids by taking advantage of protein engineering. Two biochemically and structurally characterized recombinant transglucosylases, the amylosucrase from Neisseria polysaccharea and the α-(1→2) branching sucrase, a truncated form of the dextransucrase from L. Mesenteroides NRRL B-1299, were selected to attempt glucosylation of different flavonoids, synthesize new α-glucoside derivatives with original patterns of glucosylation and hopefully improved their water-solubility.
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Characterization of Human UMP/CMP Kinase and Its Phosphorylation of D- and 1 L-Form Deoxycytidine Analogue Monophosphates
[CANCER RESEARCH 62, 1624–1631, March 15, 2002] Characterization of Human UMP/CMP Kinase and Its Phosphorylation of D- and 1 L-Form Deoxycytidine Analogue Monophosphates Jieh-Yuan Liou, Ginger E. Dutschman, Wing Lam, Zaoli Jiang, and Yung-Chi Cheng2 Department of Pharmacology, Yale University School of Medicine, New Haven, Connecticut 06520 ABSTRACT with leukemia, lymphoma, or solid tumors (11). Deoxycytidine ana- logues, such as ␤-D-2Ј,3Ј-dideoxycytidine and L-(Ϫ)-SddC (Lamivu- Pyrimidine nucleoside monophosphate kinase [UMP/CMP kinase dine), have been shown to have anti-HIV and antihuman hepatitis B (UMP/CMPK); EC 2.7.4.14] plays a crucial role in the formation of UDP, virus activities (12–17). L-(Ϫ)-SddC was the first nucleoside analogue CDP, and dCDP, which are required for cellular nucleic acid synthesis. Several cytidine and deoxycytidine analogues are important anticancer with an L configuration to show therapeutic activity and, thus, defined ␤ Ј Ј and antiviral drugs. These drugs require stepwise phosphorylation to their a new category for the design of nucleoside analogues. -L-2 ,3 - triphosphate forms to exert their therapeutic effects. The role of UMP/ dideoxy-5-fluoro-3Ј-thia-cytidine and ␤-L-2Ј,3Ј-dideoxy-2Ј,3Ј-dide- CMPK for the phosphorylation of nucleoside analogues has been indi- hydro-5-fluorocytidine have been shown to be potent antihuman hep- cated. Thus, we cloned the human UMP/CMPK gene, expressed it in atitis B virus agents in vitro and in animal studies (18–22). In studies Escherichia coli, and purified it to homogeneity. Its kinetic properties of other ␤-L-(Ϫ)-2Ј,3Ј-dideoxycytidine analogues, it was observed were determined.
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The Role of the Salvage Pathway in Nucleotide Sugar Biosynthesis
THE ROLE OF THE SALVAGE PATHWAY IN NUCLEOTIDE SUGAR BIOSYNTHESIS: IDENTIFICATION OF SUGAR KINASES AND NDP-SUGAR PYROPHOSPHORYLASES by TING YANG (Under the Direction of Maor Bar-Peled) ABSTRACT The synthesis of polysaccharides, glycoproteins, glycolipids, glycosylated secondary metabolites and hormones requires a large number of glycosyltransferases and a constant supply of nucleotide sugars. In plants, photosynthesis and the NDP-sugar inter-conversion pathway are the major entry points to form NDP-sugars. In addition to these pathways is the salvage pathway, a less understood metabolism that provides the flux of NDP-sugars. This latter pathway involves the hydrolysis of glycans to free sugars, sugar transport, sugar phosphorylation and nucleotidylation. The balance between glycan synthesis and recycling as well as its regulation at various plant developmental stages remains elusive as many of the molecular components are unknown. To understand how the salvage pathway contributes to the sugar flux and cell wall biosynthesis, my research focused on the functional identification of salvage pathway sugar kinases and NDP-sugar pyrophosphorylases. This research led to the first identification and enzymatic characterization of galacturonic acid kinase (GalA kinase), galactokinase (GalK), a broad UDP-sugar pyrophosphorylase (sloppy), two promiscuous UDP-GlcNAc pyrophosphorylases (GlcNAc-1-P uridylyltransferases), as well as UDP-sugar pyrophosphorylase paralogs from Trypanosoma cruzi and Leishmania major. To evaluate the salvage pathway in plant biology, we further investigated a sugar kinase mutant: galacturonic acid kinase mutant (galak) and determined if and how galak KO mutant affects the synthesis of glycans in Arabidopsis. Feeding galacturonic acid to the seedlings exhibited a 40-fold accumulation of free GalA in galak mutant, while the wild type (WT) plant readily metabolizes the fed-sugar.
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New Computational Approaches for Investigating the Impact of Mutations on the Transglucosylation Activity of Sucrose Phosphorylase Enzyme
Thesis submitted to the Université de la Réunion for award of Doctor of Philosophy in Sciences speciality in bioinformatics New computational approaches for investigating the impact of mutations on the transglucosylation activity of sucrose phosphorylase enzyme Mahesh VELUSAMY Thesis to be presented on 18th December 2018 in front of the jury composed of Mme Isabelle ANDRE, Directeur de Recherche CNRS, INSA de TOULOUSE, Rapporteur M. Manuel DAUCHEZ, Professeur, Université de Reims Champagne Ardennes, Rapporteur M. Richard DANIELLOU, Professeur, Université d'Orléans, Examinateur M. Yves-Henri SANEJOUAND, Directeur de Recherche CNRS, Université de Nantes, Examinateur Mme Irène MAFFUCCI, Maître de Conférences, Université de Technologie de Compiègne, Examinateur Mme Corinne MIRAL, Maître de Conférences HDR, Université de Nantes, Examinateur M. Frédéric CADET, Professeur, Université de La Réunion, Co-directeur de thèse M. Bernard OFFMANN, Professeur, Université de Nantes, Directeur de thèse ெ்்ந்ி ிைு்ூுத் ெ்யாம் ெ்த உதி்ு ையகு் ானகு் ஆ்ற் அிு. -ிு்ு் ுதி் அ்ப் ுுக், எனு த்ைத ேுாி, தா் க்ூி, அ்ண் ு்ு்ுமா், த்ைக பா்பா, ஆ்தா ுு்மா், ீனா, அ்ண் ்ுக், ெபிய்பா, ெபிய்மா ம்ு் உுுைணயா் இு்த அைண்ு ந்ப்கு்ு் எனு மனமா்்த ந்ி. இ்த ஆ்ி்ைக ுுைம அை3த்ு ுுுத்்காரண், எனு ஆ்ி்ைக இய்ுன் ேபராிிய் ெப்னா்் ஆஃ்ேம். ப்ேு துண்கி் நா் மனதாு், ெபாுளாதார அளிு் க்3்ி் இு்தேபாு, என்ு இ்ெனாு த்ைதயாகே இு்ு எ்ைன பா்்ு்ெகா்3ா். ுி்பாக, எனு ூ்றா் ஆ்ு இுிி், அ்்ு எ்ளோ தி்ப்3 க3ைமக் ம்ு் ிர்ிைனக் இு்தாு், அைத்ெபாு்பு்தாு, அ் என்ு ெ்த ெபாுளாதார உதி, ப்கைB்கழக பிு ம்ு் இதர ி்ாக ்ப்த்ப்3 உதிகு்ு எ்ன ைகமா்ு ெகாு்தாு் ஈ3ாகாு.
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Supporting Information High-Throughput Virtual Screening
Supporting Information High-Throughput Virtual Screening of Proteins using GRID Molecular Interaction Fields Simone Sciabola, Robert V. Stanton, James E. Mills, Maria M. Flocco, Massimo Baroni, Gabriele Cruciani, Francesca Perruccio and Jonathan S. Mason Contents Table S1 S2-S21 Figure S1 S22 * To whom correspondence should be addressed: Simone Sciabola, Pfizer Research Technology Center, Cambridge, 02139 MA, USA Phone: +1-617-551-3327; Fax: +1-617-551-3117; E-mail: [email protected] S1 Table S1. Description of the 990 proteins used as decoy for the Protein Virtual Screening analysis. PDB ID Protein family Molecule Res. (Å) 1n24 ISOMERASE (+)-BORNYL DIPHOSPHATE SYNTHASE 2.3 1g4h HYDROLASE 1,3,4,6-TETRACHLORO-1,4-CYCLOHEXADIENE HYDROLASE 1.8 1cel HYDROLASE(O-GLYCOSYL) 1,4-BETA-D-GLUCAN CELLOBIOHYDROLASE I 1.8 1vyf TRANSPORT PROTEIN 14 KDA FATTY ACID BINDING PROTEIN 1.85 1o9f PROTEIN-BINDING 14-3-3-LIKE PROTEIN C 2.7 1t1s OXIDOREDUCTASE 1-DEOXY-D-XYLULOSE 5-PHOSPHATE REDUCTOISOMERASE 2.4 1t1r OXIDOREDUCTASE 1-DEOXY-D-XYLULOSE 5-PHOSPHATE REDUCTOISOMERASE 2.3 1q0q OXIDOREDUCTASE 1-DEOXY-D-XYLULOSE 5-PHOSPHATE REDUCTOISOMERASE 1.9 1jcy LYASE 2-DEHYDRO-3-DEOXYPHOSPHOOCTONATE ALDOLASE 1.9 1fww LYASE 2-DEHYDRO-3-DEOXYPHOSPHOOCTONATE ALDOLASE 1.85 1uk7 HYDROLASE 2-HYDROXY-6-OXO-7-METHYLOCTA-2,4-DIENOATE 1.7 1v11 OXIDOREDUCTASE 2-OXOISOVALERATE DEHYDROGENASE ALPHA SUBUNIT 1.95 1x7w OXIDOREDUCTASE 2-OXOISOVALERATE DEHYDROGENASE ALPHA SUBUNIT 1.73 1d0l TRANSFERASE 35KD SOLUBLE LYTIC TRANSGLYCOSYLASE 1.97 2bt4 LYASE 3-DEHYDROQUINATE DEHYDRATASE
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Saccharomyces Cerevisiae Aspartate Kinase Mechanism and Inhibition
In compliance with the Canadian Privacy Legislation some supporting forms may have been removed from this dissertation. While these forms may be included in the document page count, their removal does not represent any loss of content from the dissertation. Ph.D. Thesis - D. Bareich McMaster University - Department of Biochemistry FUNGAL ASPARTATE KINASE MECHANISM AND INHIBITION By DAVID C. BAREICH, B.Sc. A Thesis Submitted to the School of Graduate Studies in Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy McMaster University © Copyright by David C. Bareich, June 2003 1 Ph.D. Thesis - D. Bareich McMaster University - Department of Biochemistry FUNGAL ASPARTATE KINASE MECHANISM AND INHIBITION Ph.D. Thesis - D. Bareich McMaster University - Department of Biochemistry DOCTOR OF PHILOSOPHY (2003) McMaster University (Biochemistry) Hamilton, Ontario TITLE: Saccharomyces cerevisiae aspartate kinase mechanism and inhibition AUTHOR: David Christopher Bareich B.Sc. (University of Waterloo) SUPERVISOR: Professor Gerard D. Wright NUMBER OF PAGES: xix, 181 11 Ph.D. Thesis - D. Bareich McMaster University - Department of Biochemistry ABSTRACT Aspartate kinase (AK) from Saccharomyces cerevisiae (AKsc) catalyzes the first step in the aspartate pathway responsible for biosynthesis of L-threonine, L-isoleucine, and L-methionine in fungi. Little was known about amino acids important for AKsc substrate binding and catalysis. Hypotheses about important amino acids were tested using site directed mutagenesis to substitute these amino acids with others having different properties. Steady state kinetic parameters and pH titrations of the variant enzymes showed AKsc-K18 and H292 to be important for binding and catalysis. Little was known about how the S. cerevisiae aspartate pathway kinases, AKsc and homoserine kinase (HSKsc), catalyze the transfer of the y-phosphate from adenosine triphosphate (ATP) to L-aspartate or L-homoserine, respectively.
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