Cadmium-sulfide crystallites in Cd-. gamma. -glutamyl peptide complexes from Lycopersicon and Daucus

Journal Article · Sat Apr 01 04:00:00 EST 1989 · Plant Physiology, Supplement; (USA)

OSTI ID:6936470

Reese, R N ^[1]; Winge, D R ^[2]

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1. South Dakota State Univ., Brookings (USA)
2. Univ. of Utah, Salt Lake City (USA)

Hydroponically-grown tomato plants (Lycopersicon esculentum P. Mill. cv stone) and suspension-cultured carrot cells (Daucus carota L.) exposed to 100 {mu}M cadmium salts produced metal-{gamma}-glutamyl peptide complexes containing acid labile sulfur. The properties of the complexes resemble the Cd-{gamma}-glutamyl complexes from Schizosaccharomyces pombe and Candida glabrata, known to contain a CdS crystallite core. The crystallite core is stabilized by a coating of peptides of the general structure ({gamma}-Glu-Cys){sub n}-Gly. The Cd-peptide complexes contain predominantly peptides of n{sub 2}, n{sub 3}, n{sub 4} and n{sub 3}desGly. Zn-peptide complexes were also isolated from carrot cultures grown in MS medium supplemented with 2 mM Zn and cysteine. Results of preliminary characterization of these complexes are consistent with the presence of a colloidal particle similar to that of the Cd-complexes.

• OSTI ID: 6936470
• Journal Information: Plant Physiology, Supplement; (USA), Journal Name: Plant Physiology, Supplement; (USA) Vol. 89:4; ISSN PPYSA; ISSN 0079-2241
• Country of Publication: United States
• Language: English

Related Subjects

560300* -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AMINO ACIDS
BIOCHEMICAL REACTION KINETICS
CADMIUM COMPOUNDS
CADMIUM SULFIDES
CARBOXYLIC ACIDS
CARROTS
CHALCOGENIDES
COMPLEXES
CYSTEINE
ELEMENTS
FOOD
FRUITS
INORGANIC PHOSPHORS
KINETICS
MAGNOLIOPHYTA
MAGNOLIOPSIDA
METALS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PEPTIDES
PHOSPHORS
PLANT CELLS
PLANTS
PROTEINS
REACTION KINETICS
SULFIDES
SULFUR COMPOUNDS
THIOLS
TOMATOES
VEGETABLES
ZINC