151
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Roa RC, Bose SK. Requirement for cellular protein synthesis in reversal of ethidium-bormide-induced inhibition of cell transformation by murine sarcoma virus. Proc Natl Acad Sci U S A 1975; 72:4337-40. [PMID: 172904 PMCID: PMC388716 DOI: 10.1073/pnas.72.11.4337] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Cultures of mouse Balb 3T3 fibroblasts exposed to a noncytotoxic dose of ethidium bromide for 16-18 hr are unable to produce foci after infection with murine sarcoma virus. Such cultures regain susceptibility to infection when incubated for 6-8 hr in drug-free growth medium. Pretreated but not untreated cultures exhibit sensitivity toward brief (6 hr) exposure to cycloheximide, chloramphenicol, and actinomycin D before infection. Pretreatment with cordy-cepin inhibits the ability of cultures to produce foci after infection. The recovery of ethidium-bromide-treated cultures requires the synthesis of cellular proteins which may have some important role in the establishment of RNA tumor virus infection.
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152
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Nandy J, Bose SK. A new method of isolation of versicolin, an antifungal antibiotic. INDIAN JOURNAL OF BIOCHEMISTRY & BIOPHYSICS 1975; 12:72-3. [PMID: 1205493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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153
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Sengupta S, Bose SK. A proline-dependent ATP-32Pi exchange in Bacillus sutilis B3 producing mycobacillin. INDIAN JOURNAL OF BIOCHEMISTRY & BIOPHYSICS 1974; 11:335-6. [PMID: 4219849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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154
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Roa RC, Bose SK. Inhibition by ethidium bromide of the establishment of infection by murine sarcoma virus. J Gen Virol 1974; 25:197-205. [PMID: 4373527 DOI: 10.1099/0022-1317-25-2-197] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
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155
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Zlotnick BJ, Bose SK, Roa RC. Deoxyglucose transport changes in murine sarcoma virus-infected cells-a quantitative assay for virus transforming activity. J Gen Virol 1974; 24:365-8. [PMID: 4368568 DOI: 10.1099/0022-1317-24-2-365] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
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156
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Ray B, Bose SK. Physiology of spores of mycobacillin producer and non-producer mutants of Bacillus sbutilis. Folia Microbiol (Praha) 1974; 19:203-8. [PMID: 4211149 DOI: 10.1007/bf02895019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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157
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Bose SK. Dr. K.C. Chaudhuri--as I saw him. Indian J Pediatr 1974; 41:90-1. [PMID: 4609419 DOI: 10.1007/bf02787326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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158
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Banerjee PC, Bose SK. Studies on mycobacillin derivatives: ester derivatives of mycobacillin. INDIAN JOURNAL OF BIOCHEMISTRY & BIOPHYSICS 1973; 10:302-4. [PMID: 4799822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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159
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Bose SK, Zlotnick BJ. Growth-and density-dependent inhibition of deoxyglucose transport in Balb 3T3 cells and its absence in cells transformed by murine sarcoma virus. Proc Natl Acad Sci U S A 1973; 70:2374-8. [PMID: 4365700 PMCID: PMC433738 DOI: 10.1073/pnas.70.8.2374] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
The earliest measurable parameter that shows density-dependent inhibition is the uptake of [(3)H]deoxyglucose by Balb 3T3 cells. The rate decreases even during the exponential phase of growth and reaches a minimum, about 8- to 10-times lower than maximum, as the culture approaches the saturation density. Cells transformed by murine sarcoma virus fail to show either growth-dependent or density-dependent inhibition of deoxyglucose uptake. Treatment with dibutyryl cyclic AMP in the presence of theophylline results in premature cessation of growth and in an arrest in the decline of deoxyglucose transport. Culture in serum-deficient medium also produces rapid inhibition of growth at low cell density, but these cultures exhibit a markedly decreased rate of deoxyglucose uptake.
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160
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Ghosh SN, Bose SK. 3-Methyleholanthrene induced alterations in a mammalian cell line cultured 'in vitro'. Indian J Cancer 1973; 10:143-54. [PMID: 4797995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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161
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Banerjee PC, Bose SK. Studies on mycobacillin derivatives. I. Acetyl derivatives of mycobacillin. J Antibiot (Tokyo) 1973; 26:257-60. [PMID: 4780809 DOI: 10.7164/antibiotics.26.257] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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162
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Sengupta S, Bose SK. Stereoconfiguration of amino acids in peptides from a mycobacillin-synthesizing cell-free system. Biochem J 1973; 131:623-4. [PMID: 4146454 PMCID: PMC1177512 DOI: 10.1042/bj1310623] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The stereoconfiguration of amino acids, as determined by treatment with L-amino acid oxidase, d-amino acid oxidase and l-glutamate decarboxylase (containing l-aspartate decarboxylase activity), in the peptides from a mycobacillin-synthesizing cell-free system is identical with that of the growing mycobacillin peptide chaid if its synthesis starts from l-proline and is interrupted at various points by amino acid deprivation.
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163
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Abstract
In a cell-free system from Bacillus subtilis B(3), ATP-P(i) exchange was catalysed by l-proline at a pH optimum of 7.2. Further stimulation by component amino acids of mycobacillin was inhibited by deprivation from the synthesizing system of even a single amino acid occurring at any point of the cyclic peptide. This inhibition, however, decreased with the distance in the molecule of the given amino acid from l-proline. Peptides containing respectively two, three, four, five and six amino acids were isolated from the mycobacillin-synthesizing system by an amino acid-deprivation technique. The amino acid composition of these peptides and also their N- and C-terminal amino acid residues were the same as those of peptides that would be obtained if mycobacillin synthesis occurred starting from l-proline and was interrupted at various points along the polypeptide chain.
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164
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Verma OP, Bose SK. Development of diploma in public health in India. Indian J Public Health 1972; 16:84-94. [PMID: 4568367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
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165
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Halder A, Bose SK. Reversal of mycobacillin inhibition reactions by sterols and phosholipids. J Antibiot (Tokyo) 1971; 24:779-84. [PMID: 5140525 DOI: 10.7164/antibiotics.24.779] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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166
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Gupta SK, Bose SK. Marginal compression atelectasis in rickets. JOURNAL OF THE INDIAN MEDICAL ASSOCIATION 1971; 57:141-2. [PMID: 5161602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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167
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Sengupta S, Bose SK. Properties and localisation of mycobacillin-synthesising enzyme system in Bacillus subtilis B3. BIOCHIMICA ET BIOPHYSICA ACTA 1971; 237:120-2. [PMID: 4996109 DOI: 10.1016/0304-4165(71)90037-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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168
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Sengupta S, Banerjee AB, Bose SK. Gamma-glutamyl and D- or L-peptide linkages in mycobacillin, a cyclic peptide antibiotic. Biochem J 1971; 121:839-46. [PMID: 4398825 PMCID: PMC1176672 DOI: 10.1042/bj1210839] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Mycobacillin lacks amino groups but contains two free alpha-carboxyl groups, indicating the presence of two side-chain peptide linkages. The five aspartic acid residues of mycobacillin are all in alpha-peptide linkage whereas the two glutamic acid residues are in gamma-linkage. Mycobacillin does not react with hydroxylamine to give hydroxamate, indicating the absence of anhydride, lactone and ester linkages. This is also confirmed by i.r. spectroscopy and titration of the molecule. Of the 15 peptides obtained from partial hydrolysates of mycobacillin, 12 contain aspartic acid. Results obtained by treatment of hydrolysates of aspartic acid-containing peptides with d-amino acid oxidase and l-glutamate decarboxylase (containing l-aspartate decarboxylase activity) indicate that residue 5 is l-aspartic acid and residues 2, 8, 11 and 13 are d-aspartic acid. The d- or l-peptide sequence and nature of peptide linkages in mycobacillin are proposed on the basis of these findings and the amino acid sequence reported earlier.
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169
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Bose SK. Pediatric radiology: yes or no? Indian Pediatr 1970; 7:529-31. [PMID: 5500594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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170
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Bose SK, Andrews J, Roberts PD. Haematological problems in a geriatric unit with special reference to anaemia. GERONTOLOGIA CLINICA 1970; 12:339-46. [PMID: 5503840 DOI: 10.1159/000245299] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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171
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Hughes JR, Sinha DP, Cooper MR, Shah KV, Bose SK. Lung tap in childhood. Bacteria, viruses, and mycoplasmas in acute lower respiratory tract infections. Pediatrics 1969; 44:477-85. [PMID: 4310363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
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172
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Bose SK, Warren RJ. Bacteriophage-induced inhibition of host functions. II. Evidence for multiple, sequential bacteriophage-induced deoxyribonucleases responsible for degradation of cellular deoxyribonucleic acid. J Virol 1969; 3:549-56. [PMID: 4894764 PMCID: PMC375811 DOI: 10.1128/jvi.3.6.549-556.1969] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Degradation of bacterial deoxyribonucleic acid (DNA) after infection with T4 bacteriophage was studied in an endonuclease I-deficient host. The kinetics of degradation were similar to those seen in other hosts with a normal level of this enzyme. Irradiation of extracellular phage with ultraviolet (UV) destroyed the capacity of the infecting virus to induce extensive breakdown of host DNA, which was, however, converted to high-molecular-weight material. Addition of chloramphenicol to T4-infected cells provided data which can be interpreted to indicate the involvement of at least two endodeoxyribonucleases and one exodeoxyribonuclease having a high degree of specificity. A model is proposed showing the sequential action of two endodeoxyribonucleases followed by an exodeoxyribonuclease in the degradation of host DNA. The appearance of these hydrolytic enzymes requires protein synthesis. Infections leading to partial degradation only (UV-irradiated phages, gene 46 mutants) effectively inhibited the synthesis of bacterial messenger ribonucleic acid and of beta-galactosidase.
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173
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Sengupta S, Bose SK. A new chemical method of assay for mycobacillin. INDIAN JOURNAL OF BIOCHEMISTRY 1969; 6:88-90. [PMID: 4242581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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174
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Majumdar A, Bose SK. Studies on the isolation and properties of drug resistant mutants from a human malignant cell line. Indian J Cancer 1968; 5:282-6. [PMID: 5717328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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175
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Majumdar A, Bose SK. DNA mediated genetic transformation of a human cancerous cell line cultured in vitro. Br J Cancer 1968; 22:603-13. [PMID: 5681019 PMCID: PMC2008394 DOI: 10.1038/bjc.1968.72] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
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176
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Dhar AK, Bose SK. Effect of trace elements upon the fermentation of versicolin. Appl Microbiol 1968; 16:1429-30. [PMID: 5676411 PMCID: PMC547673 DOI: 10.1128/am.16.9.1429-1430.1968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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177
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Dhar AK, Bose SK. Studies on versicolin, a new antifungal antibiotic from Aspergillus versicolor. II. Isolation and purification. Appl Microbiol 1968; 16:749-52. [PMID: 5659366 PMCID: PMC547511 DOI: 10.1128/am.16.5.749-752.1968] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Versicolin is a new antifungal agent isolated from the culture broth of a new strain of Aspergillus versicolor. The antibiotic is specifically active against pathogenic fungi, particularly Trichophyton rubrum which causes 90% of the skin infections occurring in Calcutta and eastern India.
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178
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Warren RJ, Bose SK. Bacteriophage-induced inhibition of host functions. I. Degradation of Escherichia coli deoxyribonucleic acid after T4 infection. J Virol 1968; 2:327-34. [PMID: 4911847 PMCID: PMC375618 DOI: 10.1128/jvi.2.4.327-334.1968] [Citation(s) in RCA: 37] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
The kinetics of degradation of bacterial deoxyribonucleic acid (DNA) after infection of Escherichia coli with T4D, ultraviolet-irradiated T4D, and two amber mutants, N122 and N94, was studied by zone sedimentation through linear glycerol gradients. Within 5 min after infection with any of the bacteriophages, breakdown of host genome was evident. The first product was a high-molecular-weight material (50S to 70S) and further degradation appeared to occur in discrete steps. Rapid and extensive breakdown of bacterial DNA was seen after infection with am N122 and T4D. Infection with ultraviolet-irradiated phage or with am N94 resulted in an accumulation of high-molecular-weight material. These results suggest that the observed degradation of host DNA begins early and requires sequential action of several phage-induced endo- as well as exodeoxyribonucleases.
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179
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Banerjee AB, Bose SK. Biosynthesis of mycobacillin, an antifungal ppetide. 3. Incorporation of constituent D-amino acids. INDIAN JOURNAL OF BIOCHEMISTRY 1968; 5:35-6. [PMID: 4235203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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180
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181
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Dhar AK, Bose SK. Mutagens for regeneration of an antibiotic-producing strain of Aspergillus versicolor. Appl Microbiol 1968; 16:340-2. [PMID: 5645418 PMCID: PMC547408 DOI: 10.1128/am.16.2.340-342.1968] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
The individual colonies of a partially degenerated culture of Aspergillus versicolor vary widely in their ability to produce an antibiotic active against Trichophyton rubrum. Mutagenic treatment with nitrous acid or ultraviolet light gave potent colonies. Nitrous acid gave better results in terms of stability and yield. This treatment may therefore prove useful in the regeneration of partially degenerated cultures.
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182
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Bose SK, Warren RJ. In vitro stability of phage messenger ribonucleic acid. Proc Natl Acad Sci U S A 1967; 58:2408-14. [PMID: 4173586 PMCID: PMC223850 DOI: 10.1073/pnas.58.6.2408] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
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183
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Bhattacharyya P, Bose SK. Amino acid composition of cell wall and spore coat of Bacillus subtilis in relation to mycobacillin production. J Bacteriol 1967; 94:2079-80. [PMID: 4965373 PMCID: PMC276948 DOI: 10.1128/jb.94.6.2079-2080.1967] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
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184
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Bhattacharyya P, Bose SK. Effect of mycobacillin, an antifungal polypeptide antibiotic, on the producer Bacillus subtilis B3. Indian J Med Res 1967; 55:1025-9. [PMID: 4969876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
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185
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Halder A, Bhattacherya P, Banerjee ND, Bose SK. Antagonistic action of cholesterol on mycobacillin. J Bacteriol 1967; 93:2026-8. [PMID: 6026355 PMCID: PMC276726 DOI: 10.1128/jb.93.6.2026-2028.1967] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
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186
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187
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Hughes JR, Bose SK, Kloene W, Sinha DP, Cooper MR. Acute lower respiratory tract infections in Calcutta children: An etiologic study. Indian Pediatr 1966; 3:201-11. [PMID: 5296655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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