Intramembrane translocation and posttranslational palmitoylation of the chloroplast 32-kDa herbicide-binding protein

Journal Article · Sun Mar 01 00:00:00 EST 1987 · Proc. Natl. Acad. Sci. U.S.A.; (United States)

DOI:https://doi.org/10.1073/pnas.84.6.1497· OSTI ID:6526174

Mattoo, A K; Edelman, M

The 32-kDa herbicide-binding protein, a component of photosystem II, is synthesized as a membrane-associated 33.5-kDa precursor within the chloroplast. We show that membrane attachment of the precursor and processing to the 32-kDa form occur in the unstacked stromal lamellae. Once processed, the 32-kDa protein translocates, within the thylakoids, to the topologically distinct stacked granal lamellae. Posttranslational palmitoylation of the processed 32-kDa protein is also shown to occur. This modification takes place in a membrane-protected domain and is mainly confined to the protein assembled in the granal lamellae, where functional photosystem II centers are concentrated.

• Research Organization: Beltsville Agricultural Research Center, MD
• OSTI ID: 6526174
• Journal Information: Proc. Natl. Acad. Sci. U.S.A.; (United States), Vol. 6
• Country of Publication: United States
• Language: English

Related Subjects

59 BASIC BIOLOGICAL SCIENCES
PHOTOSYNTHETIC REACTION CENTERS
BIOCHEMICAL REACTION KINETICS
PROTEINS
ACYLATION
MEMBRANE TRANSPORT
CHLOROPHYLL
CHLOROPLASTS
HERBICIDES
METHIONINE
PHOTOSYNTHETIC MEMBRANES
TRACER TECHNIQUES
TRITIUM COMPOUNDS
AMINO ACIDS
CARBOXYLIC ACIDS
CELL CONSTITUENTS
CHEMICAL REACTIONS
DRUGS
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
ISOTOPE APPLICATIONS
KINETICS
LABELLED COMPOUNDS
LIPOTROPIC FACTORS
MEMBRANES
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PESTICIDES
PHYTOCHROMES
PIGMENTS
PORPHYRINS
REACTION KINETICS
550201* - Biochemistry- Tracer Techniques