Pentatricopeptide repeat proteins and their emerging roles in plants

Several protein families with tandem repeat motifs play a very important role in plant development and defense. The pentatricopeptide repeat (PPR) protein family, one of the largest families, is the most perplexing one in plants. PPR proteins have been implicated in many crucial functions broadly in...

Full description

Saved in:
Bibliographic Details
Published in:Plant physiology and biochemistry 2007-08, Vol.45 (8), p.521-534
Main Authors: Saha, D., Prasad, A.M., Srinivasan, R.
Format: Article
Language:English
Subjects:
Amino Acid Motifs
Arabidopsis - metabolism
Biological and medical sciences
Cell biochemistry
Cell physiology
Chloroplast
Chloroplasts - metabolism
Cytoplasmic male sterility
Fertility restoration
Fundamental and applied biological sciences. Psychology
Gene Expression Regulation, Plant
Genes, Plant
Genome, Plant
Mitochondria
Models, Biological
Multigene Family
Peptides - chemistry
Plant development
Plant Physiological Phenomena
Plant physiology and development
Plant Proteins - chemistry
Plant Proteins - physiology
PPR proteins
Protein Structure, Tertiary
RNA - chemistry
RNA processing
RNA, Plant - chemistry
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Several protein families with tandem repeat motifs play a very important role in plant development and defense. The pentatricopeptide repeat (PPR) protein family, one of the largest families, is the most perplexing one in plants. PPR proteins have been implicated in many crucial functions broadly involving organelle biogenesis and plant development. PPR motifs are degenerate motifs, each with 35-amino-acid sequences and are present in tandem arrays of 2–27 repeats per protein. Although PPR proteins are found in other eukaryotes, their large number is probably required in plants to meet the specific needs of organellar gene expression. The repeats of PPR proteins form a superhelical structure to bind a specific ligand, probably a single-stranded RNA molecule, and modulate its expression. Functional studies on different PPR proteins have revealed their role in organellar RNA processing, fertility restoration in CMS plants, embryogenesis, and plant development. Functional genomic techniques can help identify the diverse roles of the PPR family of proteins in nucleus-organelle interaction and in plant development.
ISSN:0981-9428
1873-2690
DOI:10.1016/j.plaphy.2007.03.026