Photorespiration
uniprot_keyword
KW-0601
canonical
name
Photorespiration
uniprot
definition
Protein involved in a light-dependent process to convert 2-phospho- glycolate (2-PG) into 3-phospho-D-glycerate (3-PG), where oxygen is consumed and carbon dioxide released. It takes place in plants and cyanobacteria during the light period, since in the presence of O(2) their type of Rubisco can catalyze the oxidative fragmentation of ribulose 1,5-biphosphate to 3-PG and 2-PG. 2-PG inhibits the Calvin cycle enzyme triose-phosphate isomerase, and so must be eliminated quickly. In plants 2-PG is recycled to 3-PG via reactions in peroxisomes, mitochondria as well as chloroplasts. For every 2 molecules of 2-PG, one molecule of 3-PG is formed and one molecule of CO(2) is lost. In cyanobacteria it seems there are two mechanisms to deal with 2-PG; a path similar to that described for plants and the bacterial-like glycerate pathway.
uniprot
keywords
is_obsolete
false
uniprot
keywords
ontology_id
uniprot_keywords
uniprot
keywords