{"title":"Modification of the esteratic activity of acetylcholinesterase by alkylation with 1,1-dimethyl-2-phenylaziridinium ion","authors":"Jocelyn E. Purdie, Robert A. McIvor","doi":"10.1016/0926-6593(66)90025-7","DOIUrl":"10.1016/0926-6593(66)90025-7","url":null,"abstract":"","PeriodicalId":100160,"journal":{"name":"Biochimica et Biophysica Acta (BBA) - Enzymology and Biological Oxidation","volume":"128 3","pages":"Pages 590-593"},"PeriodicalIF":0.0,"publicationDate":"1966-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0926-6593(66)90025-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75094054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effect of various bivalent cations and chelating agents on oxidative decarboxylation of α-keto acids","authors":"Taro Hayakawa, Masahiro Hirashima, Minoru Hamada, Masahiko Koike","doi":"10.1016/0926-6593(66)90019-1","DOIUrl":"10.1016/0926-6593(66)90019-1","url":null,"abstract":"","PeriodicalId":100160,"journal":{"name":"Biochimica et Biophysica Acta (BBA) - Enzymology and Biological Oxidation","volume":"128 3","pages":"Pages 574-576"},"PeriodicalIF":0.0,"publicationDate":"1966-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0926-6593(66)90019-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84249099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Das redoxpotential der glukoseoxydase aus Aspergillus niger (Nigerin) in abhängigkeit vom pH","authors":"M.J. Walter","doi":"10.1016/0926-6593(66)90011-7","DOIUrl":"10.1016/0926-6593(66)90011-7","url":null,"abstract":"<div><p>The oxidation-reduction potential of the glucose oxidase from <em>Aspergillus niger</em> was determined by titration with leucosafranine in the pH range 4.5–7.5. The results are compared with the oxidation-reduction potential values reported by K<span>e</span><sup>1</sup> for FAD. Possibilities for the binding between the apoprotein and the prosthetic group are discussed.</p></div>","PeriodicalId":100160,"journal":{"name":"Biochimica et Biophysica Acta (BBA) - Enzymology and Biological Oxidation","volume":"128 3","pages":"Pages 504-509"},"PeriodicalIF":0.0,"publicationDate":"1966-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0926-6593(66)90011-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89191444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Masataka Mori , Hiroshi Taniuchi , Yutaka Kojima , Osamu Hayaishi
{"title":"Studies on kynurenate hydroxylase: requirement for iron and flavin nucleotide","authors":"Masataka Mori , Hiroshi Taniuchi , Yutaka Kojima , Osamu Hayaishi","doi":"10.1016/0926-6593(66)90014-2","DOIUrl":"10.1016/0926-6593(66)90014-2","url":null,"abstract":"<div><p></p><ul><li><span>1.</span><span><p>1. Kynurenate hydroxylase (kynurenate, NAD(P)H:O<sub>2</sub> oxidoreductase (hydroxylating), EC 1.14.1.3), an enzyme which catalyzes the conversion of kynurenate to kynurenate-7,8-dihydrodiol, has been purified from Pseudomonas.</p></span></li><li><span>2.</span><span><p>2. The partially purified enzyme preparation is stimulated 6–8 fold by the addition of ferrous ion. It is strongly inhibited by <span><math><mtext>o-</mtext><mtext>phenanthroline</mtext></math></span> and α,α′-dipyridyl and its activity is specifically restored by the addition of ferrous ion.</p></span></li><li><span>3.</span><span><p>3. Flavin nucleotides were shown to participate in the kynurenate hydroxylase reaction. After acid ammonium sulfate treatment of the enzyme, it is active only upon the addition of flavin nucleotides.</p></span></li><li><span>4.</span><span><p>4. The enzyme is unstable but is fairly well protected from inactivation by some reducing agents, heated extracts, or in an atmosphere of nitrogen. The enzyme, once inactivated by oxygen, can be reactivated almost to the original level by the addition of sodium borohydride. The effects of various reducing agents and conditions required for this reactivation have been studied. required for this reactivation have been studied.</p></span></li></ul></div>","PeriodicalId":100160,"journal":{"name":"Biochimica et Biophysica Acta (BBA) - Enzymology and Biological Oxidation","volume":"128 3","pages":"Pages 535-546"},"PeriodicalIF":0.0,"publicationDate":"1966-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0926-6593(66)90014-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81925490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Luz Maria Del Castillo, Yoloxóchitl Bustamante, M. Castañeda-Agulló
{"title":"Dielectric constant and enzyme kinetics solvent effects on the esterolytic activity of trypsin","authors":"Luz Maria Del Castillo, Yoloxóchitl Bustamante, M. Castañeda-Agulló","doi":"10.1016/0926-6593(66)90021-X","DOIUrl":"10.1016/0926-6593(66)90021-X","url":null,"abstract":"","PeriodicalId":100160,"journal":{"name":"Biochimica et Biophysica Acta (BBA) - Enzymology and Biological Oxidation","volume":"128 3","pages":"Pages 578-581"},"PeriodicalIF":0.0,"publicationDate":"1966-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0926-6593(66)90021-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85471598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Metabolit-induzierte inaktivierung von glutaminsynthetase aus Escherichia coli im zellfreien system","authors":"Dieter Mecke, Karl Wulff, Helmut Holzer","doi":"10.1016/0926-6593(66)90016-6","DOIUrl":"10.1016/0926-6593(66)90016-6","url":null,"abstract":"<div><p>A system is described in which glutaminine synthetase (EC 6.3.1.2) from <em>Escherichia coli</em> B is irreversibly inactivated by incubation with ATP, Mg<sup>2+</sup> and gluatmine or glutamate <em>in vitro</em>. Under the conditions chose, the glutamyl transferase activity does not change significantly.</p><p>Mechanisms are discussed for the in activation of glutamine synthetase <em>in vitro</em> as well as the relationship of this process to the inactivation of the enzyme by NH<sub>4</sub><sup>+</sup> in intact cells.</p></div>","PeriodicalId":100160,"journal":{"name":"Biochimica et Biophysica Acta (BBA) - Enzymology and Biological Oxidation","volume":"128 3","pages":"Pages 559-567"},"PeriodicalIF":0.0,"publicationDate":"1966-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0926-6593(66)90016-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83351176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Paolo Truffa-Bachi, Gisèle Le Bras, Georges N. Cohen
{"title":"The threonine-sensitive homoserine dehydrogenase and aspartokinase activities of Escherichia coli","authors":"Paolo Truffa-Bachi, Gisèle Le Bras, Georges N. Cohen","doi":"10.1016/0926-6593(66)90005-1","DOIUrl":"10.1016/0926-6593(66)90005-1","url":null,"abstract":"<div><p></p><ul><li><span>1.</span><span><p>1. Homoserine dehydrogenase I (<span>l</span>-homoserine:NADP<sup>+</sup> oxidoreductase, EC 1.1.1.3) of <em>Escherichia coli</em> is inactivated with apparent first-order kinetics by exposure at pH 9 in Tris buffer. This inactivation is accompanied by desensitization of the enzyme towards threonine.</p></span></li><li><span>2.</span><span><p>2. <span>L</span>-Aspartate and ATP, the substrates of the associated activity, β-aspartokinase I (ATP:<span>L</span>-aspartate 4-phosphotransferase, EC 2.7.2.4) protect against the desensitization of homoserine dehydrogenase.</p></span></li></ul></div>","PeriodicalId":100160,"journal":{"name":"Biochimica et Biophysica Acta (BBA) - Enzymology and Biological Oxidation","volume":"128 3","pages":"Pages 450-453"},"PeriodicalIF":0.0,"publicationDate":"1966-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0926-6593(66)90005-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86818248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Isolation and purification of an acid phosphatase from baker's yeast (Saccharomyces cerevisiae)","authors":"P. Boer, Elizabeth P. Steyn-Parvé","doi":"10.1016/0926-6593(66)90189-5","DOIUrl":"10.1016/0926-6593(66)90189-5","url":null,"abstract":"","PeriodicalId":100160,"journal":{"name":"Biochimica et Biophysica Acta (BBA) - Enzymology and Biological Oxidation","volume":"128 2","pages":"Pages 400-402"},"PeriodicalIF":0.0,"publicationDate":"1966-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0926-6593(66)90189-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17043481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The effect of K+ on dephosphorylation of an acid stable phosphorylated intermediate of the (Na+-K+)-requiring ATPase activity","authors":"R. Rendi","doi":"10.1016/0926-6593(66)90187-1","DOIUrl":"10.1016/0926-6593(66)90187-1","url":null,"abstract":"","PeriodicalId":100160,"journal":{"name":"Biochimica et Biophysica Acta (BBA) - Enzymology and Biological Oxidation","volume":"128 2","pages":"Pages 394-396"},"PeriodicalIF":0.0,"publicationDate":"1966-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0926-6593(66)90187-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"15336351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}