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10 resultados
Purification and properties of growth stage-dependent antiviral proteins from the leaves of Celosia cristata.
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Two antiviral glycoproteins, active against mechanical transmission of two tobamoviruses, tobacco mosaic virus and sunnhemp rosette virus, and citrus ring spot virus (ungrouped), were purified from the dried leaves of Celosia cristata. These proteins, called CCP-25 and CCP-27, have M(r) 25 and 27
Antiviral effects of extracts from Celosia cristata and Raphanus sativus roots against viral hemorrhagic septicemia virus.
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The antiviral activity of an extract mixture from Celosia cristata and Raphanus sativus was tested against viral hemorrhagic septicemia virus (VHSV). Pretreatment of EPC cells with this extract up to 72 h before VHSV infection markedly reduced the virus titer, but it had no effect when added after
Depurination of ribosomal RNA and inhibition of viral RNA translation by an antiviral protein of Celosia cristata.
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An antiviral protein (25 kD) isolated from leaves of Celosia cristata (CCP 25) was tested for depurination study on ribosomal RNA from yeast. Ribosomal RNA yielded 360 nucleotide base fragment after treatment with CCP 25 indicating that CCP 25 was a ribosome inactivating protein. CCP 25 also
Cloning and expression of small cDNA fragment encoding strong antiviral peptide from Celosia cristata in Escherichia coli.
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A small cDNA fragment containing a ribosome-inactivating site was isolated from the leaf cDNA population of Celosia cristata by polymerase chain reaction (PCR). PCR was conducted linearly using a degenerate primer designed from the partially conserved peptide of ribosome-inactivating/antiviral
An antiviral protein having deoxyribonuclease and ribonuclease activity from leaves of the post-flowering stage of Celosia cristata.
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An antiviral protein named CCP-27 was purified from the leaves of Celosia cristata at the post-flowering stage by anion-exchange, cation-exchange, and gel-filtration chromatography. It exhibited resistance against sunnhemp rosette virus in its test host Cyamopsis tetragonoloba. It also exhibited
Purification of a ribosome-inactivating protein with antioxidation and root developer potencies from Celosia plumosa.
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Considering Celosia plumosa as a potent antiviral plant, the attempt was made to determine, purify and characterize its proteinaceous antiviral elements against tobacco mosaic virus hypersensitive response on Nicotiana glutinosa. By using 60% ammonium sulphate-precipitation, FPLC-based
Modifications in the purification protocol of Celosia cristata antiviral proteins lead to protein that can be N-terminally sequenced.
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Plants antiviral proteins are being used as anticancer agents and inhibit other viral diseases in humans. We modified the purification protocol of the two N-terminally blocked antiviral glycoproteins, CCP-25 and CCP-27, purified from the leaves of Celosia cristata. This not only gave rise to single
Molecular cloning and functional identification of a ribosome inactivating/antiviral protein from leaves of post-flowering stage of Celosia cristata and its expression in E. coli.
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A full-length cDNA clone, encoding a ribosome inactivating/antiviral protein (RIP/AVP) was isolated from the cDNA library of post-flowering stage of Celosia cristata leaves. The full-length cDNA consisted of 1015 nucleotides, with an open reading frame encoding 283 amino acids. The deduced amino
Cystatins may confer viral resistance in plants by inhibition of a virus-induced cell death phenomenon in which cysteine proteinases are active: cloning and molecular characterization of a cDNA encoding cysteine-proteinase inhibitor (celostatin) from Celosia cristata (crested cock's comb).
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Cystatins (cysteine proteinase inhibitors) have been recently used in plants as antiviral strategy against those viruses whose replication involves cysteine proteinase activity. We proposed an idea that cystatins may confer resistance by inhibition of a virus-induced cell-death phenomenon in which
Isolation and characterization of cDNAs encoding ribosome inactivating protein from Dianthus sinensis L.
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To isolate a ribosome inactivating protein (RIP) gene, six plant species were surveyed for antiviral activity. Crude proteins extracted from these plants were tested for the antiviral activity against tobacco mosaic virus (TMV) in Nicotiana glutinosa. All the plants, Spinacia oleracea, Amaranthus
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