phytolacca/protease

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Purification and properties of a protease from the sarcocarp of bead tree fruit.

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A protease was purified from bead tree fruit (Melia azedarach L. var. japonica Makino) in four steps, including HPLC gel-filtration. The M(r) of the enzyme, named melain, was estimated to be 25,000 on SDS-PAGE and on HPLC gel filtration. Melain contained a carbohydrate moiety. Using casein as a

Isolation and characterisation of a cysteine protease (phytolacain G), from Phytolacca americana roots.

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Protein extracts obtained from dried and fresh roots of Phytolacca americana L. (Phytolaccaceae) were examined in order to identify and characterise individual proteins. The extracts were compared with a commercial pokeweed mitogen standard using SDS polyacrylamide gel electrophoresis (SDS-PAGE). A

Amino acid sequence and some properties of phytolacain R, a cysteine protease from full-growth fruits of pokeweed, Phytolacca americana.

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A cysteine protease, phytolacain R from full-growth greenish fruits of pokeweed, Phytolacca americana L, was purified to electrophoretic homogeneity by a simple purification procedure employing CM-Sepharose ion-exchange chromatography. The enzyme was present in low content in the young fruits about

Amino acid sequence and some properties of phytolacain G, a cysteine protease from growing fruit of pokeweed, Phytolacca americana.

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A protease, phytolacain G, has been found to appear on CM-Sepharose ion-exchange chromatography of greenish small-size fruits of pokeweed, Phytolacca americana L, from ca. 2 weeks after flowering, and increases during fruit enlargement. Reddish ripe fruit of the pokeweed contained both phytolacain G

Comparison of phytolacain G, a cysteine protease from fruit of Phytolacca americana, with phytolacain R.

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The enzymatic properties of phytolacain G, a protease isolated from green fruit of pokeweed, were compared with those of phytolacain R, a protease obtained from ripe fruit. The optimum pH of phytolacain G was 7.5-8.0 at 37 degrees C using casein as the substrate. The enzyme was strongly inhibited by

Comparison of phytolacain R, a cysteine protease from Phytolacca americana, with papain.

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Nine sites of oxidized insulin B-chain were cleaved by phytolacain R, isolated from pokeweed, after 20 hr of hydrolysis. Five cleavage sites resembled those of papain. Substrate specificity of phytolacain R was similar to that of papain, preferring hydrophobic P2 residues. The activities of fibrin

Amino acid sequences of two ferredoxins from pokeweed, Phytolacca americana.

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The amino acid sequences of two ferredoxins isolated from pokeweed, Phytolacca americana, were determined. Tryptic peptides of maleyl-carboxymethyl-ferredoxin I and carboxymethyl-ferredoxin II were prepared and analyzed. The large peptides were further digested with staphylococcal protease and

A non-toxic pokeweed antiviral protein mutant inhibits pathogen infection via a novel salicylic acid-independent pathway.

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Pokeweed antiviral protein (PAP), a ribosome-inactivating protein isolated from Phytolacca americana, is characterized by its ability to depurinate the sarcin/ricin (S/R) loop of the large rRNA of prokaryotic and eukaryotic ribosomes. In this study, we present evidence that PAP is associated with

Complete amino acid sequence of chitinase-A from leaves of pokeweed (Phytolacca americana).

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The complete amino acid sequence of pokeweed leaf chitinase-A was determined. First all 11 tryptic peptides from the reduced and S-carboxymethylated form of the enzyme were sequenced. Then the same form of the enzyme was cleaved with cyanogen bromide, giving three fragments. The fragments were

Isolation and characterization of a novel ribosome-inactivating protein from root cultures of pokeweed and its mechanism of secretion from roots.

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Ribosome-inactivating proteins are N-glycosidases that remove a specific adenine from the sarcin/ricin loop of the large rRNA, thus arresting protein synthesis at the translocation step. In the present study, a novel type I ribosome-inactivating protein, termed PAP-H, was purified from Agrobacterium

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