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The process of directing proteins towards the chloroplast, usually using signals contained within the protein. Imported proteins are synthesized as cytosolic precursors containing N-terminal uptake-targeting sequences that direct each protein to its correct subcompartment and are subsequently cleaved. The import of proteins into the chloroplast stroma. Import depends on ATP hydrolysis catalyzed by stromal chaperones. Chloroplast stromal proteins, such as the S subunit of rubisco, have a N-terminal stromal-import sequence of about 44 amino acids which is cleaved from the protein precursor after import. The import of proteins into the chloroplast thylakoid membranes. Proteins that are destined for the thylakoid lumen require two uptake-targeting sequences: the first targets the protein to the stroma, and the second targets the protein from the stroma to the thylakoid lumen. Four separate thylakoid-import systems deal with the proteins once they are in the stroma. The process of targeting specific proteins to particular membrane-bounded subcellular organelles. Usually requires an organelle specific protein sequence motif. The directed movement of proteins in a cell, including the movement of proteins between specific compartments or structures within a cell, such as organelles of a eukaryotic cell.

View Gene Ontology (GO) Term

GO TERM SUMMARY
Name: protein targeting to chloroplast
Acc: GO:0045036
Aspect: Biological Process
Desc: The process of directing proteins towards the chloroplast, usually using signals contained within the protein. Imported proteins are synthesized as cytosolic precursors containing N-terminal uptake-targeting sequences that direct each protein to its correct subcompartment and are subsequently cleaved.
Synonyms:
  • protein-chloroplast targeting
Proteins in PDR annotated with:
   This term: 11 [Search]
   Term or descendants: 23 [Search]


[geneontology.org]
INTERACTIVE GO GRAPH

GO:0045036 - protein targeting to chloroplast (interactive image map)
YRC Informatics Platform - Version 3.0
Created and Maintained by: Michael Riffle