Evidence for nucleotide-dependent processes in the thylakoid lumen of plant chloroplasts--an update.
The thylakoid lumen is an aqueous chloroplast compartment enclosed by the thylakoid membrane network. Bioinformatic and proteomic studies indicated the existence of 80-90 thylakoid lumenal proteins in Arabidopsis thaliana, having photosynthetic, non-photosynthetic or unclassified functions. None of the identified lumenal proteins had canonical nucleotide-binding motifs. It was therefore suggested that, in contrast to the chloroplast stroma harboring nucleotide-dependent enzymes and other proteins, the thylakoid lumen is a nucleotide-free compartment. Based on recent findings, we provide here an updated view about the presence of nucleotides in the thylakoid lumen of plant chloroplasts, and their role in function and dynamics of photosynthetic complexes.
Department of Biological and Environmental Sciences, University of Gothenburg, 405 30 Gothenburg, Sweden. cornelia.spetea.wiklund@bioenv.gu.se
Cornelia
C
Spetea
Björn
B
Lundin
D000135:Acid Phosphatase / Q000378:metabolism; D000244:Adenosine Diphosphate / Q000378:metabolism; D000255:Adenosine Triphosphate / Q000378:metabolism; D017360:Arabidopsis / Q000378:metabolism*; D002736:Chloroplasts / Q000378:metabolism*; D009711:Nucleotides / Q000378:metabolism*; D010766:Phosphorylation; D010788:Photosynthesis; D040901:Proteomics; D020524:Thylakoids / Q000378:metabolism*
D009711:Nucleotides; D000244:Adenosine Diphosphate; D000255:Adenosine Triphosphate; D000135:Acid Phosphatase