Longest axes of ATP and the sugars RuBP and G3P

Range ATP ∼1.4 nm: RuBP [Ribulose-1,5-bisphosphate] ∼1.2 nm: G3P [Glyceraldehyde 3-phosphate] ∼0.7 nm nm
Organism Generic
Reference Engel, B. D., Schaffer, M., Kuhn Cuellar, L., Villa, E., Plitzko, J. M., and Baumeister, W. (2015). Native architecture of the Chlamydomonas chloroplast revealed by in situ cryo-electron tomography. Elife 4, 1–29. p.19 top paragraphPubMed ID25584625
Comments "The pyrenoid minitubules identified in this study (Figure 9E–H) form narrow continuous channels between the interthylakoid stromal space and the pyrenoid matrix (Figures 10 and 11). Therefore, [researchers] propose that minitubules facilitate the rapid targeted diffusion of small molecules such as ATP and Calvin–Benson cycle sugars between these two compartments. The minitubule lumen diameter is only 3–4 nm by 8–15 nm, while the longest axes of ATP and the sugars RuBP and G3P measure ~1.4 nm, ~1.2 nm, and ~0.7 nm, respectively. Thus, diffusion of these metabolites through the minitubules would be practically one-dimensional."
Entered by Uri M
ID 111333