251
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Sarov I, Joklik WK. Studies on the nature and location of the capsid polypeptides of vaccinia virions. Virology 1972; 50:579-92. [PMID: 4117937 DOI: 10.1016/0042-6822(72)90409-6] [Citation(s) in RCA: 108] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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252
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Been AC, Rasch EM. Cellular and secretory proteins of the salivary glands of Sciara coprophila during the larval-pupal transformation. J Cell Biol 1972; 55:420-32. [PMID: 4116523 PMCID: PMC2108802 DOI: 10.1083/jcb.55.2.420] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
The cellular and secretory proteins of the salivary gland of Sciara coprophila during the stages of the larval-pupal transformation were examined by electrophoresis in 0.6 mm sheets of polyacrylamide gel with both SDS-continuous and discontinuous buffer systems. After SDS-electrophoresis, all electrophoretograms of both reduced and nonreduced proteins from single glands stained with Coomassie brilliant blue revealed a pattern containing the same 25 bands during the stages of the larval-pupal transformation. With the staining procedures used in this study, qualitative increases and decreases were detected in existing proteins and enzymes. There was no evidence, however, for the appearance of new protein species that could be correlated with the onset of either pupation or gland histolysis. Electrophoretograms of reduced samples of anterior versus posterior gland parts indicated that no protein in the basic pattern of 25 bands was unique to either the anterior or posterior gland part. Electrophoretograms of reduced samples of secretion collected from either actively feeding or "cocoon"-building animals showed an electrophoretic pattern containing up to six of the 25 protein fractions detected in salivary gland samples, with varied amounts of these same six proteins in electrophoretograms of secretion samples from a given stage. Zymograms of non-specific esterases in salivary gland samples revealed a progressive increase in the amount of esterase reaction produce in one major band and some decrease in the second major band during later stages of the larval-pupal transformation.
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Abstract
SV40 (Simian Virus 40) DNA was pulse-labeled with [(3)H]thymidine in infected monkey cells, and the distribution of label within newly completed molecules was determined by analysis of specific fragments produced by restriction endonuclease from Hemophilus influenzae. From these data, an order of synthesis or temporal order of the fragments was deduced. Comparison of the temporal order with the physical order of the fragments in the SV40 DNA molecule indicates a correspondence in these orders for two separate groups of fragments. From an analysis of the results, we conclude that SV40 DNA replication begins at a specific site and proceeds bidirectionally, terminating about halfway around the circular molecule from the initiation point.
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254
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Brunovskis I, Summers WC. The process of infection with coliphage 17. VI. A phage gene controlling shutoff of host RNA synthesis. Virology 1972; 50:322-7. [PMID: 4564521 DOI: 10.1016/0042-6822(72)90383-2] [Citation(s) in RCA: 46] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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255
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Martin SA, Zweerink HJ. Isolation and characterization of two types of bluetongue virus particles. Virology 1972; 50:495-506. [PMID: 4344192 DOI: 10.1016/0042-6822(72)90400-x] [Citation(s) in RCA: 99] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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256
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Georgopoulos CP, Hendrix RW, Kaiser AD, Wood WB. Role of the host cell in bacteriophage morphogenesis: effects of a bacterial mutation on T4 head assembly. NATURE: NEW BIOLOGY 1972; 239:38-41. [PMID: 4561971 DOI: 10.1038/newbio239038a0] [Citation(s) in RCA: 119] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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257
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258
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Ong BL, Jackson JF. Aspartate transcarbamoylase from Phaseolus aureus. Partial purification and properties. Biochem J 1972; 129:571-81. [PMID: 4658988 PMCID: PMC1174160 DOI: 10.1042/bj1290571] [Citation(s) in RCA: 46] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
1. Aspartate transcarbamoylase from 4-day-old radicles of Phaseolus aureus was purified 190-fold by (NH(4))(2)SO(4) fractionation, DEAE-cellulose and DEAE-Sephadex chromatography and Sephadex-gel filtration. The partially purified enzyme, which required P(i) for maximum stability, had an apparent molecular weight of 83000+/-5000. 2. Uridine nucleotides were found to inhibit the activity; UMP was the most potent inhibitor, followed by UDP and UTP. No other nucleotide was found to affect the enzyme, nor could UMP inhibition be overcome by adding another nucleotide. Aspartate gives a hyperbolic substrate-saturation curve, both with and without UMP. The nucleotide inhibitor is non-competitive with respect to this substrate. Carbamoyl phosphate also yields a hyperbolic substrate-saturation curve in the absence of feedback inhibitor, but when UMP is added a sigmoidal pattern results, and the inhibition is competitive with carbamoyl phosphate. 3. The degree of inhibition by UMP is not affected by p-chloromercuribenzoate, urea, mild heat pretreatment or change in pH over the range 8.5-10.5, but is affected by temperature. 4. The aspartate analogue, succinate, both activates and inhibits the reaction, depending on the concentrations of aspartate and succinate used. 5. Kinetic studies with the partially purified enzyme showed that the K(m) for carbamoyl phosphate (0.091 mm) is much lower than that for aspartate (1.7mm). A sequential reaction mechanism was inferred from product-inhibition kinetics, with carbamoyl phosphate binding to the enzyme before aspartate, and the product, carbamoylaspartate, being released ahead of P(i). Initial-velocity studies gave a set of parallel reciprocal plots, compatible with an essentially irreversible step occurring before the binding of aspartate.
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259
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Adenosine 3′,5-Monophosphatedependent Phosphorylation of a Specific Protein in Synaptic Membrane Fractions from Rat Cerebrum. J Biol Chem 1972. [DOI: 10.1016/s0021-9258(20)81153-3] [Citation(s) in RCA: 136] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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260
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Sedwick WD, Wang TSF, Korn D. Purification and Properties of Nuclear and Cytoplasmic Deoxyribonucleic Acid Polymerases from Human KB Cells. J Biol Chem 1972. [DOI: 10.1016/s0021-9258(19)44934-x] [Citation(s) in RCA: 148] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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261
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Baum SG, Horwitz MS, Maizel JV. Studies of the mechanism of enhancement of human adenovirus infection in monkey cells by simian virus 40. J Virol 1972; 10:211-9. [PMID: 4342239 PMCID: PMC356452 DOI: 10.1128/jvi.10.2.211-219.1972] [Citation(s) in RCA: 123] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
The defect which prevents human adenovirus replication in monkey cells and the mechanism whereby this restriction is overcome by coinfection with simian virus 40 (SV40) have been studied. Adenovirus capsid proteins are not synthesized efficiently in monkey cells in the absence of SV40. Adenovirus "enhancement" by SV40 was found to be the product of increased efficiency of replication by a small percentage of cells. This enhancement effect apparently occurred only when SV40 and adenovirus infected the same cells. These findings suggest that the replicative block occurs prior to virion assembly, and an accompanying report seeks to locate the site of restriction more precisely at the post-transcriptional level.
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262
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Shrivastava PK, Goch H, Zakrzewski K. Plurality of human serum albumin. BIOCHIMICA ET BIOPHYSICA ACTA 1972; 271:310-9. [PMID: 4625790 DOI: 10.1016/0005-2795(72)90205-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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263
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Desmond W, Harary I. In vitro studies of beating heart cells in culture. XV. Myosin turnover and the effect of serum. Arch Biochem Biophys 1972; 151:285-94. [PMID: 4261464 DOI: 10.1016/0003-9861(72)90499-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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264
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Mohamed N, Randles J. Effect of tomato spotted wilt virus on ribosomes, ribonucleic acids and fraction I protein in Nicotiana tabacum leaves. ACTA ACUST UNITED AC 1972. [DOI: 10.1016/0048-4059(72)90006-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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265
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Whittaker M, Charlier AR. The effect of phospholipase A on human erythrocyte acetylcholinesterase. FEBS Lett 1972; 22:283-286. [PMID: 11946618 DOI: 10.1016/0014-5793(72)80251-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- M Whittaker
- Department of Chemistry, The University, Stocker Road, EX4 4QD, Exeter, England
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266
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267
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268
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Ritchie GA, Nicholas DJ. Identification of the sources of nitrous oxide produced by oxidative and reductive processes in Nitrosomonas europaea. Biochem J 1972; 126:1181-91. [PMID: 5073730 PMCID: PMC1178541 DOI: 10.1042/bj1261181] [Citation(s) in RCA: 216] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
1. Cells of Nitrosomonas europaea produced N(2)O during the oxidation of ammonia and hydroxylamine. 2. The end-product of ammonia oxidation, nitrite, was the predominant source of N(2)O in cells. 3. Cells also produced N(2)O, but not N(2) gas, by the reduction of nitrite under anaerobic conditions. 4. Hydroxylamine was oxidized by cell-free extracts to yield nitrite and N(2)O aerobically, but to yield N(2)O and NO anaerobically. 5. Cell extracts reduced nitrite both aerobically and anaerobically to NO and N(2)O with hydroxylamine as an electron donor. 6. The relative amounts of NO and N(2)O produced during hydroxylamine oxidation and/or nitrite reduction are dependent on the type of artificial electron acceptor utilized. 7. Partially purified hydroxylamine oxidase retained nitrite reductase activity but cytochrome oxidase was absent. 8. There is a close association of hydroxylamine oxidase and nitrite reductase activities in purified preparations.
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269
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Vasiletz IM, Shavlovsky MM, Neifakh SA. The study of the active center of human ceruloplasmin by iodination. EUROPEAN JOURNAL OF BIOCHEMISTRY 1972; 25:498-504. [PMID: 5043318 DOI: 10.1111/j.1432-1033.1972.tb01721.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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270
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271
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Bedford JJ. Osmoregulation in Melanopsis trifasciata gray 1843—III. The intracellular nitrogenous compounds. ACTA ACUST UNITED AC 1971. [DOI: 10.1016/0300-9629(71)90279-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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272
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Boime I, Aviv H, Leder P. Protein synthesis directed by encephalomyocarditis virus RNA. II. The in vitro synthesis of high molecular weight proteins and elements of the viral capsid. Biochem Biophys Res Commun 1971; 45:788-95. [PMID: 4331472 DOI: 10.1016/0006-291x(71)90486-4] [Citation(s) in RCA: 35] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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273
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Hill RJ, Poccia DL, Doty P. Towards a total macromolecular analysis of sea urchin embryo chromatin. J Mol Biol 1971; 61:445-62. [PMID: 5130301 DOI: 10.1016/0022-2836(71)90392-5] [Citation(s) in RCA: 105] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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274
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275
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Williams K, Kunz W, Petersen K, Schnieders B. Changes in mouse liver RNA induced by ethyl carbamate (urethane) and methyl carbamate. ZEITSCHRIFT FUR KREBSFORSCHUNG UND KLINISCHE ONKOLOGIE. CANCER RESEARCH AND CLINICAL ONCOLOGY 1971; 76:69-82. [PMID: 4255592 DOI: 10.1007/bf00304289] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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276
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Polyacrylamide Gel Electrophoresis of Viral RNA. ACTA ACUST UNITED AC 1971. [DOI: 10.1016/b978-0-12-470205-9.50010-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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277
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278
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Reid MS, Bieleski RL. Changes in phosphatase activity in phosphorus-deficient Spirodela. PLANTA 1970; 94:273-281. [PMID: 24496971 DOI: 10.1007/bf00385759] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/1970] [Indexed: 06/03/2023]
Abstract
Onset of phosphorus deficiency in Spirodela oligorrhiza was accompanied by a 50-fold increase in phosphatase activity of cell extracts. The enzyme behaved like other plant acid phosphatase, and was both inhibited and repressed by inorganic phosphate. The phosphatase activity comprised at least three isozymes. Two, of low molecular weight, were present only in P-deficient Spirodela; one of high molecular weight was also present, though in smaller amounts, in normal Spirodela. Presence of 2-thiouracil during onset of P-deficiency partly inhibited the development of phosphatase activity. The nature and role of the increased phosphatase activity in P-deficient plants are discussed.
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Affiliation(s)
- M S Reid
- Fruit Research Division, Department of Scientific and Industrial Research, Auckland, New Zealand
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279
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Billington RW, Heyes JK. Effects of Inhibitors on Light-stimulated Synthesis in Radish Hypocotyl. Nature 1970; 227:858-60. [PMID: 16058175 DOI: 10.1038/227858a0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Revised: 05/11/1970] [Indexed: 11/08/2022]
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280
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Randles JW, Coleman DF. Loss of ribosomes in Nicotiana glutinosa L. infected with lettuce necrotic yellows virus. Virology 1970; 41:459-64. [PMID: 5424815 DOI: 10.1016/0042-6822(70)90167-4] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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281
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282
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McDowall MA. Anionic proteinase from Actinidia chinensis. Preparation and properties of the crystalline enzyme. EUROPEAN JOURNAL OF BIOCHEMISTRY 1970; 14:214-21. [PMID: 5506167 DOI: 10.1111/j.1432-1033.1970.tb00280.x] [Citation(s) in RCA: 89] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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283
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Abstract
1. Plasma membranes were isolated from crude nuclear sediments from mouse and rat liver by a rate-dependent centrifugation through a sucrose density gradient contained in the ;A' type zonal rotor. 2. The membranes were further purified by isopycnic centrifugation, and characterized enzymically, chemically and morphologically. 3. When the plasma-membrane fraction of sucrose density 1.17g/cm(3) was dispersed in a tight-fitting homogenizer, two subfractions of densities 1.12 and 1.18 were obtained by isopycnic centrifugation. 4. The light subfraction contained 5'-nucleotidase, nucleoside diphosphatase, leucine naphthylamidase and Mg(2+)-stimulated adenosine triphosphatase activities at higher specific activities than unfractionated membranes. The heavy subfraction was deficient in the above enzymes but contained higher Na(+)+K(+)-stimulated adenosine triphosphatase activity. 5. The light subfraction contained twice as much phospholipid and cholesterol, and three times as much N-acetylneuraminic acid relative to unit protein weight as the heavy subfraction. Polyacrylamide-gel electrophoresis indicated differences in protein composition. 6. Electron microscopy showed the light subfraction to be vesicular. The heavy subfraction contained membrane strips with junctional complexes in addition to vesicles.
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Randles JW. Ribonuclease isozymes in Chinese cabbage systemically infected with turnip yellow mosaic virus. Virology 1968; 36:556-63. [PMID: 5723669 DOI: 10.1016/0042-6822(68)90187-6] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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