151
|
Magendzo K, Shirvan A, Cultraro C, Srivastava M, Pollard HB, Burns AL. Alternative splicing of human synexin mRNA in brain, cardiac, and skeletal muscle alters the unique N-terminal domain. J Biol Chem 1991; 266:3228-32. [PMID: 1825209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Several synexin (annexin VII) mRNAs have been identified by screening a human fibroblast cDNA library. One type of message contained an alternatively spliced cassette exon, predicting two isoforms of synexin differing in the N-terminal domain. Polymerase chain reaction analysis of synexin mRNA from various fetal and adult tissues, from human and monkey, revealed that the alternative splicing event is tissue-regulated; synexin mRNA containing the cassette exon is prevalent in brain, heart, and skeletal muscle. This is supported by Western blot analysis showing that muscle synexin (annexin VIIb) is larger than synexin from lung (annexin VIIa). The muscle and lung isoforms have the same molecular mass as the recombinant synexins expressed in Escherichia coli using cDNAs containing or lacking the cassette exon, respectively. The difference in size is consistent with the molecular masses predicted from the proteins encoded by the alternatively spliced synexin mRNAs. Another type of synexin mRNA contained a longer 3'-noncoding region generated by the selection of an alternate poly(A) signal. Northern analysis of human fibroblast RNA showed the presence of two bands (2.0- and 2.4-kilobase) when hybridized to a cDNA fragment of the coding region of synexin, but only the 2.4-kilobase band hybridized to a probe made from the longer 3' end.
Collapse
|
152
|
Magendzo K, Shirvan A, Cultraro C, Srivastava M, Pollard HB, Burns AL. Alternative splicing of human synexin mRNA in brain, cardiac, and skeletal muscle alters the unique N-terminal domain. J Biol Chem 1991. [DOI: 10.1016/s0021-9258(18)49978-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
|
153
|
Burns AL, Magendzo K, Srivastava M, Rojas E, Parra C, de la Fuente M, Cultraro C, Shirvan A, Vogel T, Heldman J. Human synexin (annexin VII) polymorphisms: tissue specificity and expression in Escherichia coli. Biochem Soc Trans 1990; 18:1118-21. [PMID: 2150946 DOI: 10.1042/bst0181118] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
|
154
|
Srivastava M, McBride OW, Fleming PJ, Pollard HB, Burns AL. Genomic organization and chromosomal localization of the human nucleolin gene. J Biol Chem 1990; 265:14922-31. [PMID: 2394707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Nucleolin, a eukaryotic nucleolar phosphoprotein, is involved in the synthesis and maturation of ribosomes. To characterize the genomic organization and regulatory sequences of this gene, two overlapping lambda clones containing the human nucleolin gene plus flanking regions were isolated from a genomic library using human nucleolin cDNA. Southern blots of genomic DNA from human, several mammals, chicken, and yeast revealed that the nucleolin gene is well conserved across these species. The gene consists of 14 exons with 13 intervening sequences and spans approximately 11 kilobases of DNA. Analysis of the splice junctions indicated that the amino-terminal domain and the four RNA binding domains plus the nuclear localization signal are split into adjacent exons. Sequences from the 5'-flanking and the first intron contain a high content of GC residues which is consistent with nucleolin being a "housekeeping" gene. Promoter elements include an atypical TATA box (GTTA), one CCAAT box much further from the initiation site, three reverse compliments of CCAAT (ATTGG), and two pyrimidine-rich nucleotide stretches. In addition, this region and the first intron contain numerous potential Sp1, GCF, CRE-fos, GCN, AP-1, AP-2, UCE, and sequences similar to the glucocorticoid receptor binding site. The transcription start site was determined by primer extension and S1 nuclease mapping of RNA from human liver. One Kpn and three Alu repeats were found within two of the middle introns. The 3'-untranslated portion of the gene contains five homology blocks in a 100-base pair region that are highly conserved among human, mouse, and hamster genomes. Finally, we have determined that the human nucleolin gene is located on chromosome 2q12-qter and is present at one copy per haploid genome. A restriction fragment length polymorphism with EcoRI has been detected in the gene.
Collapse
|
155
|
Srivastava M, McBride O, Fleming P, Pollard H, Burns A. Genomic organization and chromosomal localization of the human nucleolin gene. J Biol Chem 1990. [DOI: 10.1016/s0021-9258(18)77205-0] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
|
156
|
Gupta CK, Srivastava M, Murthy PK, Tyagi K, Mandal SK, Gunmala, Sen AB. Circadian periodicity in microfilarial counts. THE JOURNAL OF TROPICAL MEDICINE AND HYGIENE 1990; 93:222-4. [PMID: 2348501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
We propose a second-order harmonic model to describe circadian periodicity in the 24-h cycle of microfilarial counts. Rhesus monkeys (Macaca mulatta) were infected with Brugia malayi. Definite evidence of circadian periodicity was found in the microfilarial counts. The estimates of the parameters, periodicity indices and peak hours were determined.
Collapse
|
157
|
Abstract
A cDNA containing the entire coding region for human nucleolin has been isolated from a lambda gt10 human retinal library using a bovine cDNA probe. The cDNA hybridized to a transcript of 3000 bases from fast-dividing cells, as well as terminally differentiated tissues of several species. Translation of the nucleotide sequence revealed a long open reading frame which predicts a 707 amino acid protein with several distinct domains. These include repeating elements, four conserved RNA-binding regions, a glycine-rich carboxy-terminal domain and sites for phosphorylation, glycosylation and dibasic cleavage. Human and bovine nucleolin exhibited more additions and/or substitutions of aspartate, glutamate and serine residues in the chromatin-binding domains by comparison with the hamster and mouse nucleolins. These differences may be related to species-specific functions in transcription.
Collapse
|
158
|
Burns AL, Magendzo K, Shirvan A, Srivastava M, Rojas E, Alijani MR, Pollard HB. Calcium channel activity of purified human synexin and structure of the human synexin gene. Proc Natl Acad Sci U S A 1989; 86:3798-802. [PMID: 2542947 PMCID: PMC287228 DOI: 10.1073/pnas.86.10.3798] [Citation(s) in RCA: 112] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Synexin is a calcium-dependent membrane binding protein that not only fuses membranes but also acts as a voltage-dependent calcium channel. We have isolated and sequenced a set of overlapping cDNA clones for human synexin. The derived amino acid sequence of synexin reveals strong homology in the C-terminal domain with a previously identified class of calcium-dependent membrane binding proteins. These include endonexin II, lipocortin I, calpactin I heavy chain (p36), protein II, and calelectrin 67K. The Mr 51,000 synexin molecule can be divided into a unique, highly hydrophobic N-terminal domain of 167 amino acids and a conserved C-terminal region of 299 amino acids. The latter domain is composed of alternating hydrophobic and hydrophilic segments. Analysis of the entire structure reveals possible insights into such diverse properties as voltage-sensitive calcium channel activity, ion selectivity, affinity for phospholipids, and membrane fusion.
Collapse
|
159
|
Joshi N, Ayesha Q, Mateen MA, Habibullah CM, Srivastava M. "HBV status among mentally retarded". THE JOURNAL OF THE ASSOCIATION OF PHYSICIANS OF INDIA 1988; 36:166-7. [PMID: 3182646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
|
160
|
Haldar-Misra C, Srivastava M. Effect of pinealectomy on photoperiodic gonadal response of Indian palm squirrel, Funambulus pennanti. CAN J ZOOL 1987. [DOI: 10.1139/z87-132] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The role of the pineal gland in mediating the effects of photoperiod on the reproductive axis is not well established in tropical mammals. Indian palm squirrels (Funambulus pennanti) were exposed to experimental long (16L:8D) and short (6L:18D) photoperiods. It was observed that the testes regressed in response to short photoperiod, while during the long photoperiod the gonads were active. When squirrels were maintained for a long experimental period (130 days) under the short photoperiodic schedule (6L:18D), gonadal regrowth eventually occurred even though the photoperiod was the same one that initially induced testicular regression. Pinealectomized animals maintained the gonadal activity even in short photoperiod, suggesting that the effect of photoperiod is mediated through the pineal gland.
Collapse
|
161
|
Srivastava M, Dua RD. Characterization of prosthetic groups of naphthalene oxygenase from Corynebacterium renale. INDIAN JOURNAL OF BIOCHEMISTRY & BIOPHYSICS 1985; 22:13-7. [PMID: 4030001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
162
|
Srivastava M, Vivekanand T, Malik GK, Bhadury S, Srivastava VK. Retinoblastoma. Indian Pediatr 1984; 21:875-9. [PMID: 6534882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
|
163
|
Srivastava M, Nityanand S, Kapoor NK. Effect of high fat diet on biogenic monoamine levels of rhesus monkeys. INDIAN JOURNAL OF EXPERIMENTAL BIOLOGY 1984; 22:599-602. [PMID: 6534847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
|
164
|
Virk DS, Singh NB, Srivastava M, Harinarayana G. Regression analysis for general adaptation in pearl millet using different environmental indices. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 1984; 68:509-513. [PMID: 24257822 DOI: 10.1007/bf00284999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/1984] [Accepted: 05/24/1984] [Indexed: 06/02/2023]
Abstract
Regression analyses on grain yield of 20 hybrid and 13 composite varieties of pearl millet (Pennisetum typhoides (Burm. S. & H.)) evaluated at 19 sites in India were performed to assess their relative stability and to compare different measures of environmental values. A large portion of the significant genotype X environment interactions was attributed to the non-linear component and deviations mean squares (Sdi (2)) were a very important parameter for selection of stable varieties. The mean grain yield was positively associated with regression coefficients and deviations mean squares. The hybrids MH 31, MH 35, MH 36 and MH 62 and composite populations MP 16, MP 31 and MP 36 possessed general adaptability. The use of dependent, independent and near-independent measures of environmental values has been found to have little influence on the general interpretation of regression analysis in pearl millet.
Collapse
|
165
|
Srivastava M, Duong LT, Fleming PJ. Cytochrome b561 catalyzes transmembrane electron transfer. J Biol Chem 1984; 259:8072-5. [PMID: 6330096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Purified cytochrome b561 from bovine adrenal medulla chromaffin vesicles has been reconstituted into phosphatidylcholine vesicles by a detergent-dialysis method. When the reconstituted cytochrome-containing vesicles were preloaded with ascorbic acid and cytochrome c was added to the external medium, the internal ascorbic acid was able to reduce the external cytochrome c. This reduction of cytochrome c was dependent on the presence of cytochrome b561 in the membrane and was not due to leakage of ascorbate from the vesicles. These results demonstrate that cytochrome b561 catalyzes a transmembrane electron transfer.
Collapse
|
166
|
Srivastava M, Duong LT, Fleming PJ. Cytochrome b561 catalyzes transmembrane electron transfer. J Biol Chem 1984. [DOI: 10.1016/s0021-9258(17)39692-8] [Citation(s) in RCA: 70] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
|
167
|
Schoor WP, Srivastava M. Position-specific induction of benzo(a)pyrene metabolism by 3-methylcholanthrene and phenobarbital in mullet (Mugil cephalus), a marine fish. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. C, COMPARATIVE PHARMACOLOGY AND TOXICOLOGY 1984; 78:391-6. [PMID: 6149086 DOI: 10.1016/0742-8413(84)90104-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Mullet (Mugil cephalus), a marine fish, were treated with 3-methylcholanthrene and phenobarbital by i.p. injection and the effects on the metabolism of benzo(a)pyrene by isolated liver microsomes were evaluated. The most significant effect found in treated fish was an increase in the oxidation of benzo(a)pyrene at the bay region, a position-specific increase which was not reflected in an increase in the total activity. Comparison of metabolite patterns of the dihydrodiols of benzo(a)pyrene in the presence and absence of trichloropropene oxide showed that predicted inhibitions were observed in control as well as treated animals. No significant differences in metabolite patterns were found between the 3-methylcholanthrene- and phenobarbital-treated fish in either the presence or absence of trichloropropene oxide. Comparison is made to published data on similar position-specific effects observed in rats.
Collapse
|
168
|
Yadava VN, Srivastava M, Garg RK, Kumar M. Clinical study of the role of collagen sheet cover in the management of burn wounds. JOURNAL OF THE INDIAN MEDICAL ASSOCIATION 1983; 80:112-113. [PMID: 6644039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
|
169
|
Srivastava VK, Nath C, Srivastava M. Hypersensitivity to certain drugs in a rural population. Indian J Med Res 1981; 73:801-4. [PMID: 7262955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
|
170
|
Srivastava M, Kapoor NK. Regulation of dopamine-beta-hydroxylase in vitro in rat heart & adrenal tissue. INDIAN JOURNAL OF EXPERIMENTAL BIOLOGY 1980; 18:647-9. [PMID: 6254872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
|
171
|
Srivastava M, Kapoor NK. Levels of biogenic amines in the different tissues of developing rats. INDIAN JOURNAL OF EXPERIMENTAL BIOLOGY 1979; 17:1413-4. [PMID: 540996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|
172
|
Srivastava M, Gupta SP. Polyphenol oxidase and scleroprotein/melanin pigments of Isoparorchis hypselobagri. ZEITSCHRIFT FUR PARASITENKUNDE (BERLIN, GERMANY) 1978; 55:55-8. [PMID: 207031 DOI: 10.1007/bf00383475] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The polyphenol oxidase activity of Isoparorchis hypselobagri was estimated biochemically and was believed to be associated with egg-shell formation in the parasite. The eggs gave positive tests to color reaction of scleroprotein/melanin.
Collapse
|
173
|
Srivastava M, Gupta SP. Studies on in vitro survival of Isoparorchis hypselobagri. ZEITSCHRIFT FUR PARASITENKUNDE (BERLIN, GERMANY) 1977; 52:61-8. [PMID: 18849 DOI: 10.1007/bf00380559] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Adult parasites, Isoparorchis hypselobagri were maintained in vitro in four basic salt solutions, viz. Stephenson saline, AB saline, Tyrode's solution and Locke's solution. Survival was prolonged by adding sugars to Tyrode's solution. Of all the sugars, glucose was found most effective and parasites survived for 39 days in solution containing glucose, 6 days in galactose and sucrose, 10 days in fructose and lactose and 12 days in maltose. The parasites absorb carbohydrates through the cuticle. Ligated parasites survived for a longer period than unligated parasites. The pH 9 was considered as an optimum for maximum survival of the parasites Isoparorchis hypselobagri for 39 days.
Collapse
|
174
|
Srivastava M, Gupta SP. Amino acid composition in Isoparorchis hypselobagri. ZEITSCHRIFT FUR PARASITENKUNDE (BERLIN, GERMANY) 1976; 49:183-5. [PMID: 1274387 DOI: 10.1007/bf00382425] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The free amino acids of Isoparorchis hypselobagri have been determined by the chromatographic method (two-dimensional ascending). These are: leucine, valine, proline, alanine, glycine, glutamic acid and aspartic acid.
Collapse
|
175
|
Srivastava M, Gupta SP. Protein metabolism in Isoparorchis hypselobagri. ZEITSCHRIFT FUR PARASITENKUNDE (BERLIN, GERMANY) 1976; 49:179-82. [PMID: 1274386 DOI: 10.1007/bf00382424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Isoparorchis hypselobagri was maintained in a non-nutrient medium containing streptomycin and penicillin to prevent bacterial growth for a period of 12 hours. The parasites were kept under aerobic conditions at a suitable temperature of 30 degrees C. The protein content in Isoparorchis hypselobagri ranged from 56.25% to 67.5% with an average of 63.5%+/-4.6 of dry seight of the tissue. The nitrogen of Isoparorchis hypselobagri excreted as ammonia, after 12 hours of starvation was 3.04% of the total body nitrogen and as uric acid 1.6% of total body nitrogen.
Collapse
|