Leaf-Specific Upregulation of Chloroplast Translocon Genes by a CCT Motif–Containing Protein, CIA 2
AUTOR(ES)
Sun, Chih-Wen
FONTE
American Society of Plant Biologists
RESUMO
Chloroplasts are a major destination of protein traffic within leaf cells. Protein import into chloroplasts is mediated by a set of translocon complexes at the chloroplast envelope. Current data indicate that the expression of translocon genes is regulated in a tissue-specific manner, possibly to accommodate the higher import demand of chloroplasts in leaves and the lower demand of plastids in other tissues. We have designed a transgene-based positive screen to isolate mutants disrupted in protein import into plastids. The first locus we isolated, CIA2, encodes a protein containing a motif conserved within the CCT family of transcription factors. Biochemical analysis indicates that CIA2 is responsible for specific upregulation of the translocon genes atToc33 and atToc75 in leaves. Identification of CIA2 provides new insights into the tissue-specific regulation of translocon gene expression.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=139451Documentos Relacionados
- Thyroid hormone receptor-binding protein, an LXXLL motif-containing protein, functions as a general coactivator
- Recombinant PhpA Protein, a Unique Histidine Motif-Containing Protein from Streptococcus pneumoniae, Protects Mice against Intranasal Pneumococcal Challenge
- Peri-Implantation Lethality in Mice Lacking the Sm Motif-Containing Protein Lsm4
- The PB1 domain and the PC motif-containing region are structurally similar protein binding modules
- Two Yeast La Motif-containing Proteins Are RNA-binding Proteins that Associate with Polyribosomes