1301
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Banerjee A, Levy HR, Levy GC, Chan WW. Conformations of bound nucleoside triphosphate effectors in aspartate transcarbamylase. Evidence for the London-Schmidt model by transferred nuclear Overhauser effects. Biochemistry 1985; 24:1593-8. [PMID: 4005218 DOI: 10.1021/bi00328a003] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Transferred nuclear Overhauser effects were used to determine the conformations of ATP, CTP, and ITP bound to the regulatory site of aspartate transcarbamylase. The results are in accord with the predictions of the London-Schmidt model [London, R. E., & Schmidt, P. G. (1972) Biochemistry 11, 3136] and show that ATP and CTP bind in the anti conformation while ITP binds in the syn conformation.
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1302
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Banerjee A, Veliath AJ, Ratnakar C. Malignant fibrous histiocytoma of the lung. Indian Pediatr 1985; 22:246-8. [PMID: 2993166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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1303
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Banerjee A, Brown CJ. Picric acid–naphthalene 1/1 π complex, C6H3N3O7.C10H8. A disordered structure. Acta Crystallogr C 1985. [DOI: 10.1107/s0108270185002840] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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1304
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Dutta S, Banerjee A, Sharma A, Talukder G, Chowdhury AN. Certain genetic markers in psychotic disorders. THE JOURNAL OF THE ASSOCIATION OF PHYSICIANS OF INDIA 1984; 32:961-4. [PMID: 6597184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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1305
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Grace M, Bagchi M, Ahmad F, Yeager T, Olson C, Chakravarty I, Nasrin N, Banerjee A, Gupta NK. Protein synthesis in rabbit reticulocytes: a study of the mechanism of action of the protein factor RF that reverses protein synthesis inhibition in heme-deficient reticulocyte lysates. Proc Natl Acad Sci U S A 1984; 81:5379-83. [PMID: 6591195 PMCID: PMC391707 DOI: 10.1073/pnas.81.17.5379] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
A eukaryotic initiation factor 2 (eIF-2)-ancillary protein factor Co-eIF-2 promotes displacement of GDP from eIF-2 X GDP and facilitates ternary complex (Met-tRNAf X eIF-2 X GTP) formation in the presence of Mg2+. Heme-regulated protein synthesis inhibitor, HRI, phosphorylates the alpha-subunit of eIF-2 and thus inhibits ternary complex formation as Co-eIF-2 does not displace GDP from eIF-2 alpha (P) X GDP. RF, a high molecular weight cell supernatant factor, reverses protein synthesis inhibition in heme-deficient reticulocyte lysates and also reverses HRI inhibition of ternary complex formation. RF contains Co-eIF-2 activity. In addition, an active RF preparation contains excess alpha-subunit of eIF-2 in the free and unphosphorylated form and this alpha-subunit of eIF-2 is not phosphorylated by HRI and ATP. In this paper we report (i) an active RF preparation contains excess alpha-subunit of eIF-2 and this alpha-subunit can be phosphorylated by HRI and ATP in the presence of GDP; (ii) RF promotes ternary complex formation by eIF-2 X [3H]GDP with accompanying GDP displacement; (iii) in the presence of HRI and ATP, RF promotes ternary complex formation by eIF-2 X [3H]GDP without accompanying GDP displacement; (iv) in the presence of HRI and ATP, the ternary complex formed using RF is active in Met-tRNAf X 40S initiation complex formation; (v) both the ternary complex and the Met-tRNAf X 40S complex formation in the presence of HRI and ATP are completely inhibited by prior incubation of RF with GDP; (vi) upon further fractionation of an active RF fraction, a preparation can be obtained that contains HRI-sensitive Co-eIF-2 activity. However, this preparation does not efficiently reverse protein synthesis inhibition in heme-deficient reticulocyte lysates and does not contain excess alpha-subunit of eIF-2. Based on these observations, we have suggested (a) RF provides the unphosphorylated alpha-subunit to eIF-2 alpha (P) X GDP and restores eIF-2 activity. This RF activity is inhibited as the alpha-subunit in the RF preparation becomes phosphorylated by HRI and ATP in the presence of GDP; (b) RF contains Co-eIF-2 activity, which has dual functions: (i) stimulation of ternary complex formation by eIF-2 and (ii) GDP displacement from eIF-2 X GDP during ternary complex formation. In the presence of HRI and ATP, Co-eIF-2 but does not displace GDP from eIF-2 alpha(P) X GDP.
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1306
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Banerjee A, Subbarao KS, Ratnakar C, Mahadevan KM, Reddy KS. Primary lymphoblastic lymphosarcoma of the lung. Indian Pediatr 1984; 21:738-40. [PMID: 6549175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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1307
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Banerjee A, De A, Chakraborty S, Sugar D, Chandrasekharan R, Arnott S. Structure of single-stranded poly(2′- o-ethylcytidylic acid) – the effect of alkylation on poly(C). Acta Crystallogr A 1984. [DOI: 10.1107/s0108767384098433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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1308
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Hazra B, Sur P, Roy DK, Sur B, Banerjee A. Biological activity of diospyrin towards Ehrlich ascites carcinoma in Swiss A mice. PLANTA MEDICA 1984; 50:295-297. [PMID: 6505078 DOI: 10.1055/s-2007-969713] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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1309
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Banerjee A, Brown CJ, Jain PC, Gautam P. Tris(2,6-dimethyl-4H-pyran-4-one)dinitratocadmium(II), [Cd(NO3)2(C7H8O2)3]. Acta Crystallogr C 1984. [DOI: 10.1107/s0108270184007186] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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1310
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Banerjee A, Subbarao KS, Venkatarman S. Tracheo-oesophageal fistula following blunt trauma. J Laryngol Otol 1984; 98:743-4. [PMID: 6747457 DOI: 10.1017/s0022215100147371] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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1311
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Pähler A, Banerjee A, Dattagupta JK, Fujiwara T, Lindner K, Pal GP, Suck D, Weber G, Saenger W. Three-dimensional structure of fungal proteinase K reveals similarity to bacterial subtilisin. EMBO J 1984; 3:1311-4. [PMID: 6378621 PMCID: PMC557514 DOI: 10.1002/j.1460-2075.1984.tb01968.x] [Citation(s) in RCA: 67] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The three-dimensional structure of the fungal serine protease proteinase K has been determined at 3.3 A resolution by single crystal X-ray diffraction analysis. The enzyme crystallizes in the tetragonal space group P4(3)2(1)2 with cell constants a = b = 68.3 A, c = 108.5 A. The asymmetric unit consists of one monomer of 27 000 daltons mol. wt., approximately 50% higher than the so far assumed value of 18 500 daltons. The main chain fold of proteinase K shows a high degree of tertiary homology with the corresponding bacterial subtilisin BPN'. Proteinase K is the second enzyme in this family of serine proteases to be studied by X-ray diffraction, thus confirming the existence of two unrelated families of serine proteases in pro-and eukaryotes.
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1312
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Banerjee A, Khanna SK, Malhotra V, Narayanan PS. Surgical haemodynamic problems in a case of Uhl's anomaly. Indian Heart J 1984; 36:182-5. [PMID: 6386671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
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1313
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Benedict WF, Banerjee A, Kangalingam KK, Dansie DR, Kouri RE, Henry CJ. Increased sister-chromatid exchange in bone-marrow cells of mice exposed to whole cigarette smoke. Mutat Res 1984; 136:73-80. [PMID: 6717473 DOI: 10.1016/0165-1218(84)90136-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Using defined cigarette smoke exposure conditions, BC3F1/Cum mice were exposed nose-only to two different types of whole cigarette smoke on a daily basis for 1 week and up to 46 weeks. The number of sister-chromatid exchanges (SCEs) per metaphase was determined in bone-marrow cells. Studies were scheduled so that all cytogenetic observations were made 2-3 days after the last smoke exposure. Exposure to either type of smoke on a daily basis for 1 week or up to 46 weeks resulted in a 2-fold increase in SCEs over sham-exposed control mice. In animals exposed either chronically or for 1 week to either type of smoke, the increase in SCEs persisted for at least 1 week after cessation of smoke exposure. This is the first demonstration of the induction of SCEs in laboratory animals that have been exposed to cigarette smoke in vivo.
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1314
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Banerjee A, Burg J, Conzelmann E, Carroll M, Sandhoff K. Enzyme-linked immunosorbent assay for the ganglioside GM2-activator protein. Screening of normal human tissues and body fluids, of tissues of GM2 gangliosidosis, and for its subcellular localization. HOPPE-SEYLER'S ZEITSCHRIFT FUR PHYSIOLOGISCHE CHEMIE 1984; 365:347-56. [PMID: 6724528 DOI: 10.1515/bchm2.1984.365.1.347] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
An enzyme-linked immunosorbent assay was developed for the quantitation of the human activator protein for ganglioside GM2 degradation by beta-N-acetyl-D-hexosaminidase A. With this assay, various tissues and body fluids of normal subjects and of patients with variant forms of GM2 gangliosidosis were screened for their GM2-activator content. The highest content of this protein was found in kidney. Tissues from patients with variant AB of infantile GM2 gangliosidosis contained only low levels (up to 5% of that of normal controls) of cross-reacting material. On subcellular fractionation of normal human skin fibroblasts, the activator was found to co-distribute with the lysosomal marker enzyme beta-hexosaminidase.
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1315
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Banerjee A, Khanna SK, Narayanan PS. Use of Fogarty catheters for removal of tracheobronchial foreign bodies. Chest 1984; 85:452. [PMID: 6697812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
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1316
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Thiyagarajan P, Borso CS, Banerjee A, Cooperman BS. Small-angle X-ray scattering studies on yeast inorganic pyrophosphatase and its interactions with divalent metal ions, inorganic phosphate, and hydroxymethane bisphosphonate. Biopolymers 1984; 23:159-65. [PMID: 6141817 DOI: 10.1002/bip.360230112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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1317
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Banerjee A, Subbarao KS, Reddy KS, Baliga BN, Venkataraman S, Vivekanandan S, Venkataramamurthy E. Tracheal obstruction from a malignant growth--secondary or primary? THE INDIAN JOURNAL OF CHEST DISEASES & ALLIED SCIENCES 1984; 26:57-9. [PMID: 6510990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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1318
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Benedict WF, Banerjee A, Mark C, Murphree AL. Nonrandom chromosomal changes in untreated retinoblastomas. CANCER GENETICS AND CYTOGENETICS 1983; 10:311-33. [PMID: 6652613 DOI: 10.1016/0165-4608(83)90090-0] [Citation(s) in RCA: 76] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The karyotypic patterns of 15 retinoblastomas were examined. Five tumors were found to have two distinct stem lines and, therefore, the chromosomal patterns of 20 tumor cell lines are reported. Three nonrandom chromosomal changes, namely, a loss of a chromosome #13, the presence of an i(6p), or a trisomy of 1q were observed. The potential importance of these chromosomal changes in tumor development is discussed, particularly the loss of a chromosome #13 or the gain of an i(6p). At least one of the three chromosomal changes was found in 75% of the tumor lines analyzed.
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1319
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Banerjee A, Subbarao KS. Use of povidone iodine for the management of post-pneumonectomy empyema. Chest 1983; 84:507-8. [PMID: 6617295 DOI: 10.1378/chest.84.4.507b] [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: 01/21/2023] Open
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1320
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Banerjee A, Sobell HM. Presence of nonlinear excitations in DNA structure and their relationship to DNA premelting and to drug intercalation. J Biomol Struct Dyn 1983; 1:253-62. [PMID: 6400873 DOI: 10.1080/07391102.1983.10507438] [Citation(s) in RCA: 32] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
We propose that collectively localized nonlinear excitations (solitons) exist in DNA structure. These arise as a consequence of an intrinsic nonlinear ribose inversion instability that results in a modulated beta alternation in sugar puckering along the polymer backbone. In their bound state, soliton-antisoliton pairs contain beta premelted core regions capable of undergoing breathing motions that facilitate drug intercalation. We call such bound state structures--beta premeltons. The stability of a beta premelton is expected to reflect the collective properties of extended DNA regions and to be sensitive to temperature, pH, ionic strength and other thermodynamic factors. Its tendency to localize at specific nucleotide base sequences may serve to initiate site-specific DNA premelting and melting. We suggest that beta premeltons provide nucleation centers important for RNA polymerase-promoter recognition. Such nucleation centers could also correspond to nuclease hypersensitive sites.
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1321
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Choudhury GG, Banerjee A, Bhattacharyya B, Biswas BB. Interaction of colchicine analogues with purified tubulin. FEBS Lett 1983; 161:55-9. [PMID: 6884527 DOI: 10.1016/0014-5793(83)80729-7] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Binding of two colchicine analogues, desacetamidocolchicine and 2-methoxy-5-(2',3',4'-trimethoxyphenyl) tropone to purified tubulin have been studied. Both analogues bind to tubulin with a significant increase in fluorescence polarization of the drugs in solutions containing tubulin. The Kd for tubulin-drug complexes were found to be 1.25 X 10(-6) M and 1.08 X 10(-6) M for desacetamidocolchicine and 2-methoxy-5-(2',3',4'-trimethoxyphenyl) tropone, respectively. Scatchard analysis of the fluorescence titration curve of drug tubulin interaction also gives the values of stoichiometry and affinity constant. These were 0.8 and 1.6 X 10(6) M-1 for desacetamidocolchicine, and 0.9 and 0.58 X 10(6) M-1 for 2-methoxy-5-(2',3',4'-trimethoxyphenyl) tropone.
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1322
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Bandyopadhyay AK, Dasgupta M, Banerjee A. Effect of drugs on the activity of fungal limit dextrinase & alpha-amylase. Indian J Med Res 1983; 78:284-6. [PMID: 6360862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
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1323
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Burg J, Banerjee A, Conzelmann E, Sandhoff K. Activating proteins for ganglioside GM2 degradation by beta-hexosaminidase isoenzymes in tissue extracts from different species. HOPPE-SEYLER'S ZEITSCHRIFT FUR PHYSIOLOGISCHE CHEMIE 1983; 364:821-9. [PMID: 6225718 DOI: 10.1515/bchm2.1983.364.2.821] [Citation(s) in RCA: 34] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The existence of activator proteins that stimulate hydrolysis of ganglioside GM2 by beta-hexosaminidase was demonstrated in kidney extracts from four species (rat, mouse, cattle and pig). The extent to which these preparations, as well as their human counterpart, promote ganglioside GM2 catabolism by autologous and heterologous hexosaminidase isoenzymes was compared. It was found that these activators can replace each other functionally, although the animal activator proteins do not cross-react immunochemically with an antiserum against the human protein. All preparations examined catalysed the transfer of ganglioside GM2 between liposomal membranes, indicating that the animal activator proteins act by a mechanism similar to the human GM2 activator.
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1324
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Roychowdhuri S, Banerjee A, Bhattacharyya B. Charge effect on the colchicine binding-site of tubulin. Biochem Biophys Res Commun 1983; 113:384-90. [PMID: 6870862 DOI: 10.1016/0006-291x(83)91738-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Poly(L-lysine) was found to enhance colchicine binding activity of brain tubulin to a several folds. Bases of biological interests that were tested and found to be inactive were spermine, spermidine and even L-lysine. Part of this enhance binding is due to the increase in the affinity of colchicine-tubulin interaction in the presence of poly(L-lysine). Moreover, poly(L-lysine) stabilized the colchicine binding site of tubulin against thermal denaturation.
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1325
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Gomer CJ, Rucker N, Banerjee A, Benedict WF. Comparison of mutagenicity and induction of sister chromatid exchange in Chinese hamster cells exposed to hematoporphyrin derivative photoradiation, ionizing radiation, or ultraviolet radiation. Cancer Res 1983; 43:2622-7. [PMID: 6850580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Cell culture studies have been performed to compare the mutagenic potential and the induction of sister chromatid exchanges for hematoporphyrin derivative photoradiation, ionizing radiation, and UV radiation. The mutation frequency in Chinese hamster ovary cells at the hypoxanthine-guanine phosphoribosyltransferase locus was measured using resistance to 6-thioguanine. Phenotypic expression time prior to mutation selection was also examined. Treatment with either X-rays or UV was effective in producing mutants resistant to 6-thioguanine, but treatment with hematoporphyrin derivative photoradiation (at comparable toxicity levels) did not induce any mutagenic activity above background levels. The hematoporphyrin derivative incubation and photosensitization conditions used in this study did induce sister chromatid exchanges at frequencies comparable to those induced by X-rays but at lower frequencies than for UV treatments.
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