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BEN-ISHAI R, GOLDIN CH, KERPEL S. ON THE MECHANISM OF 5-FLUOROURACIL-INDUCED RESISTANCE TO ULTRAVIOLET IRRADIATION IN ESCHERICHIA COLI. ACTA ACUST UNITED AC 1996; 95:291-301. [PMID: 14293703 DOI: 10.1016/0005-2787(65)90493-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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BURKA ER, MARKS PA. CONTROL OF HAEMOGLOBIN A AND F SYNTHESIS: HAEMOGLOBIN FORMATION IN FOETAL AND ADULT ERYTHROID CELLS. Nature 1996; 204:659-61. [PMID: 14236282 DOI: 10.1038/204659a0] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Abstract
Apparently the leucine and tryptophan gene clusters are polarized in opposite directions on the Salmonella chromosome. Either the direction of polarity is independently determined for each operon or the bacterial chromosome may consist of more than one multi-operon unit of DNA, each such unit determining the direction of polarity of its constituent genes. Each hypothesis results in a different prediction concerning the distribution of operon polarity directions on the chromosome and the functional status of chromosomal inversions.
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MANSON LA, PELMONT J, YAPO A, ROCHE C, NISMAN B. THE BIOSYNTHESIS OF ALKALINE PHOSPHATASE WITH A PARTICULATE FRACTION OF ESCHERICHIA COLI. Biochem J 1996; 95:215-25. [PMID: 14333560 PMCID: PMC1215196 DOI: 10.1042/bj0950215] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
1. By digitonin lysis of penicillin spheroplasts of Escherichia coli a particulate fraction P(1) was previously obtained that supported the sustained synthesis of alkaline phosphatase when supplied with amino acids, nucleotide triphosphates and other cofactors. This P(1) fraction, when subjected to mild ultrasonic treatment in the presence of sucrose and Mg(2+), yielded the P(1)(S) fraction, consisting of integrated particulate subcellular particles containing DNA and RNA. 2. The P(1)(S) fraction from E. coli K10 wild type (R(+) (1)R(+) (2)P(+)) grown under repressed conditions supported the immediate synthesis of alkaline phosphatase in vitro. The synthesis occurred in phases. The first was followed by a lag, and then there was a linear rapid phase that continued for at least 3hr. Actinomycin D inhibited the appearance of the second phase. It was concluded that the particles are programmed to synthesize enzyme even when prepared from repressed cells, and therefore that synthesis of the specific messenger RNA for alkaline phosphatase in vivo was not inhibited when the bacteria were grown in an excess of inorganic phosphate. 3. Phosphate inhibited synthesis of enzyme to the same extent with the P(1)(S) fractions of two constitutive strains as with the P(1)(S) fraction of the wild-type strain. 4. Inorganic phosphate inhibited amino acid incorporation with the P(1)(S) fraction and also inhibited enzyme synthesis in vitro. The effect on amino acid incorporation could be partially overcome by adding Mn(2+) to the incubation mixtures. However, Mn(2+) inhibited the synthesis of alkaline phosphatase. Also, inhibition of the incorporation of [(32)P]CTP into RNA was overcome by Mn(2+). The effect of phosphate on amino acid uptake was most probably due to a phosphorolysis of RNA by polynucleotide phosphorylase, also present in the P(1)(S) fraction. This phosphorolysis may be responsible for the instability of messenger RNA in vitro and in vivo. 5. Phosphate also specifically inhibited the formation of alkaline phosphatase, since it did not affect markedly the induced formation of beta-galactosidase by the same P(1)(S) fraction. The specific effect is attributed to the prevention of formation of the enzymically active dimer from precursors, a Zn(2+)-dependent reaction. It is suggested that the repression of the synthesis of alkaline phosphatase in vivo in the wild-type strain was the sum of these two effects.
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MARUSHIGE K, YURA T, IMAI M. THE ROLE OF RIBOSOMES IN THE CELL-FREE FORMATION OF TRYPTOPHAN SYNTHETASE IN ESCHERICHIA COLI. ACTA ACUST UNITED AC 1996; 87:90-100. [PMID: 14167435 DOI: 10.1016/0926-6550(64)90050-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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HASELKORN R, FRIED VA. CELL-FREE PROTEIN SYNTHESIS: MESSENGER COMPETITION FOR RIBOSOMES. Proc Natl Acad Sci U S A 1996; 51:1001-7. [PMID: 14215620 PMCID: PMC300201 DOI: 10.1073/pnas.51.6.1001] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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BECKER Y, JOKLIK WK. MESSENGER RNA IN CELLS INFECTED WITH VACCINIA VIRUS. Proc Natl Acad Sci U S A 1996; 51:577-85. [PMID: 14166765 PMCID: PMC300120 DOI: 10.1073/pnas.51.4.577] [Citation(s) in RCA: 100] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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SONNEBORN TM. THE DETERMINANTS AND EVOLUTION OF LIFE. THE DIFFERENTIATION OF CELLS. Proc Natl Acad Sci U S A 1996; 51:915-29. [PMID: 14173011 PMCID: PMC300186 DOI: 10.1073/pnas.51.5.915] [Citation(s) in RCA: 99] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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WOOL IG, MOYER AN. EFFECT OF ACTINOMYCIN AND INSULIN ON THE METABOLISM OF ISOLATED RAT DIAPHRAGM. ACTA ACUST UNITED AC 1996; 91:248-56. [PMID: 14240642 DOI: 10.1016/0926-6550(64)90248-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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SMITH-KIELLAND I. EFFECT OF MITOMYCIN C ON THE SYNTHESIS OF MESSENGER RNA IN ESCHERICHIA COLI. ACTA ACUST UNITED AC 1996; 91:360-2. [PMID: 14240663 DOI: 10.1016/0926-6550(64)90270-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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PALM P, DOERFLER W, TRAUB P, ZILLIG W. INHIBITION OF THE FORMATION IN VITRO OF POLYSOMES BY SUPERNATANT FACTORS FROM ESCHERICHIA COLI. ACTA ACUST UNITED AC 1996; 91:522-4. [PMID: 14254023 DOI: 10.1016/0926-6550(64)90082-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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REVEL M, HIATT HH. MAGNESIUM REQUIREMENT FOR THE FORMATION OF AN ACTIVE MESSENGER RNA-RIBOSOME-S-RNA COMPLEX. J Mol Biol 1996; 11:467-75. [PMID: 14267269 DOI: 10.1016/s0022-2836(65)80003-1] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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WEISBERGER AS, WOLFE S, ARMENTROUT S. INHIBITION OF PROTEIN SYNTHESIS IN MAMMALIAN CELL-FREE SYSTEMS BY CHLORAMPHENICOL. ACTA ACUST UNITED AC 1996; 120:161-81. [PMID: 14206438 PMCID: PMC2137725 DOI: 10.1084/jem.120.2.161] [Citation(s) in RCA: 68] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Chloramphenicol can inhibit protein synthesis in mammalian cell-free systems as effectively as it inhibits protein synthesis in analogous microbial systems. Significant inhibition in mammalian systems was obtained only when protein synthesis was stimulated by the addition of template RNA to the system, there being comparatively little inhibition of protein synthesis by ribosomes in the absence of stimulatory RNA. It is postulated that chloramphenicol may inhibit the function of messenger or template RNA by successfully competing for ribosomal binding sites, thereby preventing the attachment of RNA to ribosomes. The apparent discrepancy in the sensitivity of mammalian and microbial cells to chloramphenicol may be related to differences in turnover or stability of ribosomal template RNA rather than to intrinsic differences in mechanism of protein synthesis. These observations are in accord with the suggestion that protein synthesis in intact mammalian cells may be susceptible to chloramphenicol inhibition only at the time that new messenger or template RNA is being deposited on ribosomes and that more mature cells may be resistant because informative RNA already deposited on ribosomes is not accessible to chloramphenicol inhibition. The inhibitory effect of chloramphenicol on protein synthesis in proliferating cells may be an important factor in hematologic toxicity attributable to chloramphenicol.
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DAS CC, KAUFMANN BP, GAY H. HISTONE PROTEIN TRANSITION IN DROSOPHILA MELANOGASTER. II. CHANGES DURING EARLY EMBRYONIC DEVELOPMENT. ACTA ACUST UNITED AC 1996; 23:423-30. [PMID: 14245430 PMCID: PMC2106538 DOI: 10.1083/jcb.23.3.423] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Employing cytochemical methods it was found that during the early embryonic development of Drosophila melanogaster the nuclei contain in sequence two kinds of chromosomal proteins. The cleavage nuclei (as also the pronuclei), until shortly before the blastoderm stage, contain an atypical (or juvenile) histone, stainable with bromophenol blue but not with alkaline fast green. The typical fast green-positive histone appears at the close of the period of the synchronized cleavage mitoses, just before blastulation, when nucleoli are first produced. The amount of DNA of the cleavage nuclei, as determined cytophotometrically, is nearly constant; therefore, the DNA moiety of the nucleohistone complex seems to remain unaffected by the protein shift during embryonic development. The implications of the protein shift in relation to the histone control of gene expression are discussed.
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Abstract
In germinating cotton embryos the partial inhibition of RNA synthesis by actinomycin D does not inhibit the incorporation of leucine-(14)C into soluble protein nor cause a loss of polyribosomes during the first 16 hours of germination. This suggests that the protein synthesis observed during this period is directed by messenger RNA which exists in the mature seed and which is not rapidly degraded and resynthesized.
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FRIEDMAN SM, WEINSTEIN IB. LACK OF FIDELITY IN THE TRANSLATION OF SYNTHETIC POLYRIBONUCLEOTIDES. Proc Natl Acad Sci U S A 1996; 52:988-96. [PMID: 14224404 PMCID: PMC300383 DOI: 10.1073/pnas.52.4.988] [Citation(s) in RCA: 93] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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WAXMAN HS, RABINOVITZ M. IRON SUPPLEMENTATION IN VITRO AND THE STATE OF AGGREGATION AND FUNCTION OF RETICULOCYTE RIBOSOMES IN HEMOGLOBIN SYNTHESIS. Biochem Biophys Res Commun 1996; 19:538-45. [PMID: 14339004 DOI: 10.1016/0006-291x(65)90159-2] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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COLEMAN G, ELLIOTT WH. EXTRACELLULAR RIBONUCLEASE FORMATION IN BACILLUS SUBTILIS AND ITS STIMULATION BY ACTINOMYCIN D. Biochem J 1996; 95:699-706. [PMID: 14342505 PMCID: PMC1206796 DOI: 10.1042/bj0950699] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
1. Extracellular ribonuclease is produced linearly for at least 3hr. by washed post-logarithmic-phase cells of Bacillus subtilis suspended in a medium containing maltose (1%) and casein hydrolysate (0.5%). 2. Low concentrations of actinomycin D (less than 2mug./ml.) stimulate ribonuclease formation, the maximum effect being observed with a concentration of 1mug./ml. Concentrations greater than 2mug./ml. are inhibitory. There is no parallel stimulation of alpha-amylase formed under the same conditions, and [(14)C]uracil incorporation into a perchloric acid-insoluble form is inhibited. 3. The actinomycin D-induced stimulation is not due to the presence of an activator, nor is the inhibition due to the release of an inhibitor by the cells. The effect is on the amount of ribonuclease produced in the medium. 4. Extracellular ribonuclease formation is partially inhibited by anaerobiosis, 2,4-dinitrophenol, sodium azide and by chloramphenicol and puromycin. 5. High concentrations of antibiotic do not completely inhibit ribonuclease formation, but a basal amount of enzyme representing 20min. synthesis in an uninhibited system is always produced. This ;antibiotic-insensitive' enzyme could possibly represent preformed enzyme ;in the pipe-line' en route to secretion. 6. The stimulated appearance of ribonuclease in the presence of 1mug. of actinomycin D/ml. is shown to be dependent on enzyme synthesis. The mechanism of this effect is discussed.
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SARGENT JR, CAMPBELL PN. THE SEQUENTIAL SYNTHESIS OF THE POLYPEPTIDE CHAIN OF SERUM ALBUMIN BY THE MICROSOME FRACTION OF RAT LIVER. Biochem J 1996; 96:134-46. [PMID: 14343122 PMCID: PMC1206914 DOI: 10.1042/bj0960134] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
1. The isolated microsome fraction of regenerating rat liver was incubated with cell sap, a source of energy and [(35)S]methionine, [(14)C]isoleucine or [(14)C]leucine for different periods of time, and microsomal albumin isolated. 2. The distribution of these isotopes in albumin was determined by separation of tryptic peptides from the protein. Radioactivity was measured in peptides either qualitatively by radioautography or quantitatively by labelling with both (3)H and (14)C. 3. A gradient of radioactivity existed at all times in albumin isolated after incubating microsomes. 4. The shorter the incubation time the fewer the peptides labelled in albumin, but the peptides with highest specific activity after short incubation times corresponded to those with highest specific activities after long incubation times. 5. Leucine released from the C-terminus of albumin had a higher specific activity than the mean specific activity of the remaining leucine residues in albumin. 6. The peptide with the highest specific activity in albumin is probably derived from the C-terminus of the protein. 7. [(14)C]Glutamic acid is incorporated into the N-terminus of albumin after incubating the microsome fraction with this isotopically labelled amino acid, cell sap and a source of energy. The specific activity of the N-terminal glutamic acid under these conditions is less than the mean specific activity of the remaining glutamic acid and glutamine residues in albumin. 8. The results are interpreted as reflecting a sequential synthesis of serum albumin in the isolated microsome fraction of rat liver. The direction of synthesis of albumin is from the N-terminus towards the C-terminus. 9. The bulk of incorporation of radioactive amino acid into albumin in the isolated microsome fraction is due to completion of partially completed, pre-existing peptide and polypeptide chains. A limited synthesis of new chains of albumin does, however, occur.
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ARONSON AI, ROSASDELVALLE M. RNA AND PROTEIN SYNTHESIS REQUIRED FOR BACTERIAL SPORE FORMATION. ACTA ACUST UNITED AC 1996; 87:267-76. [PMID: 14192366 DOI: 10.1016/0926-6550(64)90222-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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HAYASHI M, HAYASHI MN, SPIEGELMAN S. DNA CIRCULARITY AND THE MECHANISM OF STRAND SELECTION IN THE GENERATION OF GENETIC MESSAGES. Proc Natl Acad Sci U S A 1996; 51:351-9. [PMID: 14124333 PMCID: PMC300072 DOI: 10.1073/pnas.51.2.351] [Citation(s) in RCA: 74] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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ARTMAN M, ENGELBERG H. DEGRADATION OF RAPIDLY-TURNED-OVER RIBONUCLEIC ACID TO ACID-SOLUBLE COMPOUNDS BY ESCHERICHIA COLI RIBOSOMES. ACTA ACUST UNITED AC 1996; 80:517-20. [PMID: 14153858 DOI: 10.1016/0926-6550(64)90158-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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