TCDB is operated by the Saier Lab Bioinformatics Group
TCIDNameDomainKingdom/PhylumProtein(s)
1.B.29.1.1









OEP21 of 177 aas. Voltage-dependent rectifying anion channel that facilitates the translocation between chloroplast and cytoplasm of phosphorylated carbohydrates such as triosephosphate, 3-phosphoglycerate and inorganic phosphate (Pi), depending on the ATP to triosephosphate ratio in the plastidial intermembrane space.  In high triosephosphate/ATP conditions (e.g. photosynthesis), export of triosphophate from the chloroplast occurs (outward rectifying channels), but in high ATP/triosephosphate conditions (e.g. dark phase), import of phosphosolutes (inward rectifying channels) occurs (Bölter et al. 1999). The
channel is formed by eight beta-strands with a wider pore vestibule of dvest approximately 2.4 nm at the intermembrane site and a narrower filter pore of drestr approximately 1 nm. The Oep21 pore contains two high affinity sites for ATP, one located at a relative transmembrane electrical distance delta = 0.56 and the second close to the vestibule at the intermembrane site. The ATP-dependent current block and reduction in anion selectivity of the Oep21 channel is relieved by the competitive binding of phosphorylated metabolic intermediates like 3-phosphoglycerate and glycerinaldehyde 3-phosphate (Hemmler et al. 2006).

Eukaryota
Viridiplantae
OEP21 of Pisum sativum
1.B.29.1.2









OEP21 homologue

Eukaryota
Viridiplantae
OEP21 homologue of Coccomyxa subellipsoidea
1.B.29.1.3









OEP21 homologue

Eukaryota
Viridiplantae
OEP21 homologue of Chlorella variabilis
1.B.29.1.4









Oep21 of 167 aas is a voltage-dependent rectifying anion channel that facilitates the translocation between the chloroplast and cytoplasm of phosphorylated carbohydrates such as triosephosphate, 3-phosphoglycerate and inorganic phosphate (Pi), depending on the ATP to triosephosphate ratio in the plastidial intermembrane space; in high triosephosphate/ATP conditions (e.g. photosynthesis), export of triosphophate from chloroplasts occurs (outward rectifying channels), but in high ATP/triosephosphate conditions (e.g., the dark phase), import of phosphosolutes occurs (inward rectifying channels).

Eukaryota
Viridiplantae
Oep21 of Arabidopsis thaliana (Mouse-ear cress)
1.B.29.2.1









OEP21 homologue

Eukaryota
Viridiplantae
OEP21 homologue of Chlamydomonas reinhardtii
1.B.29.2.2









OEP21 homologu of 169 aas

Eukaryota
Viridiplantae
OEP21 homologue of Volvox carteri