title: The protein translocon of the plastid envelopes.
abstract: The Toc and Tic translocon facilitate import of preproteins into chloroplasts. In the past, it was speculated that several translocon subunits act specifically for different types of precursor proteins or in different tissues. To generate a comprehensive picture of the expression and tissue-specific localization of the translocon subunits, their transcript levels were analyzed in roots and leaves. Certain Tocs and Tics were found to be tissue-specific. The protein composition of the transloci in the envelope membranes of chloroplasts was analyzed to describe the function and possible stoichiometry. In contrast to Tic subunits, several Toc subunits seem to have a high turnover.
authors.affiliation: Botanik, LMU München, Menzinger Strasse 67, 80638 Münich, Germany.
authors.forename: Aleksandar
authors.initials: A
authors.lastname: Vojta
authors.forename: Marcel
authors.initials: M
authors.lastname: Alavi
authors.forename: Thomas
authors.initials: T
authors.lastname: Becker
authors.forename: Friederike
authors.initials: F
authors.lastname: Hörmann
authors.forename: Michael
authors.initials: M
authors.lastname: Küchler
authors.forename: Jürgen
authors.initials: J
authors.lastname: Soll
authors.forename: Rowena
authors.initials: R
authors.lastname: Thomson
authors.forename: Enrico
authors.initials: E
authors.lastname: Schleiff
mesh_terms: D017360:Arabidopsis / Q000235:genetics / Q000378:metabolism*; D029681:Arabidopsis Proteins / Q000235:genetics / Q000378:metabolism*; D002736:Chloroplasts / Q000378:metabolism; D018506:Gene Expression Regulation, Plant; D026901:Membrane Transport Proteins / Q000235:genetics / Q000378:metabolism*; D020411:Oligonucleotide Array Sequence Analysis; D018087:Plastids / Q000378:metabolism*; D021122:Protein Subunits / Q000235:genetics / Q000378:metabolism; D021381:Protein Transport; D014157:Transcription Factors; D014158:Transcription, Genetic
chemical_list: D029681:Arabidopsis Proteins; D026901:Membrane Transport Proteins; D021122:Protein Subunits; C411822:TOC1 protein, Arabidopsis; D014157:Transcription Factors