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Updated: Aug 18, 2026

Use of Arabidopsis eceriferum Mutants to Explore Plant Cuticle Biosynthesis
11:02

Use of Arabidopsis eceriferum Mutants to Explore Plant Cuticle Biosynthesis

Published on: May 31, 2008

プラスティド一般タンパク質輸入装置に欠陥のあるアラビドプシス変異体

P Jarvis1, L J Chen, H Li

  • 1Plant Biology Laboratory, Salk Institute, 10010 North Torrey Pines Road, La Jolla, CA 92037, USA.

Science (New York, N.Y.)
|October 2, 1998
PubMed
まとめ

研究者らは,クロロプラストの外包膜にある新しいタンパク質,トランスロコン (Toc33) を特定し,プラスティドにタンパク質をインポートするのに不可欠である. この発見は,植物の早期発達の重要なプロセスにおけるトランスロコン成分のインビボの役割を証明している.

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Cell Specific Analysis of Arabidopsis Leaves Using Fluorescence Activated Cell Sorting

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Analysis of Protein Import into Chloroplasts Isolated from Stressed Plants10:18

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Protein Transport to the Stroma01:24

Protein Transport to the Stroma

Chloroplasts are triple membrane structures with an outer membrane, an inner membrane, and a thylakoid membrane, each containing distinct metabolite transporters, membrane translocons, and enzymes. Appropriate sorting and translocating these proteins to their correct membrane systems is essential for chloroplast function.
Protein complexes called the translocon of the outer chloroplast membrane or TOC complex, and the translocon of the inner chloroplast membrane or TIC complex mediate the...
Protein Transport to the Outer Chloroplast Membrane01:11

Protein Transport to the Outer Chloroplast Membrane

Chloroplast outer membrane proteins encoded by the nucleus are synthesized in the cytosol. Soon after synthesis, they bind cytosolic factors such as 14-3-3 protein and the Hsp70 chaperones that keep these precursors in an unfolded state until their translocation.
Two models describe the mechanism of precursor recognition and entry across the outer membrane through the TOC complex. Model 1 suggests the newly synthesized precursor binds to the TOC receptor 159 and forms a complex.
Protein Transport to the Thylakoids01:22

Protein Transport to the Thylakoids

Thylakoids are membrane-bound sac-like structures within the chloroplast that serve as sites for photosynthesis. Thylakoid lumen contains many electron transport proteins and is enclosed by a thylakoid membrane rich in the light-harvesting complex. Proteins targeted to the thylakoids are transported as precursors and are sorted by the general TOC/TIC import pathway. Once the precursor reaches the stroma, stromal processing peptidases remove their transit signal and expose thylakoid signal...
Protein Transport to the Inner Chloroplast Membrane01:18

Protein Transport to the Inner Chloroplast Membrane

Proteins targeted to the inner chloroplast membrane, or plastid proteins, are transported by two general pathways: the stop-transfer and the re-insertion or post-import pathways. Most plastid proteins carry N-terminal transit sequences and internal import sequences targeting it to the specific chloroplast subcompartment. Proteins targeted by the stop-transfer pathway have internal hydrophobic sequences that inhibit their translocation into the stroma. As a result, these precursors are arrested...