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2-Carboxy-D-arabitinol 1-phosphate

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2-Carboxy-D-arabitinol 1-phosphate
Names
IUPAC name
2-C-[(Phosphonooxy)methyl]-D-ribonic acid
Systematic IUPAC name
(2R,3R,4R)-2,3,4,5-Tetrahydroxy-2-[(phosphonooxy)methyl]pentanoic acid
Other names
CA1P
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
KEGG
UNII
  • InChI=1S/C6H13O10P/c7-1-3(8)4(9)6(12,5(10)11)2-16-17(13,14)15/h3-4,7-9,12H,1-2H2,(H,10,11)(H2,13,14,15)/t3-,4-,6-/m1/s1
    Key: UJTMIRNFEXKGMS-ZMIZWQJLSA-N
  • OC[C@@H](O)[C@@H](O)[C@](O)(COP(O)(O)=O)C(O)=O
Properties
C6H13O10P
Molar mass 276.134 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

2-Carboxy-D-arabitinol 1-phosphate (or CA1P) is a molecule produced in plants that inhibits RuBisCO, a key enzyme in the Calvin cycle and carbon fixation. In dark conditions, this molecule binds to RuBisCO, preventing it from participating in chemical reactions. As the amount of light present increases, CA1P levels decrease, freeing RuBisCO's reactive ends, allowing more of the molecules to participate in chemical reactions. It can be broken down by the enzyme 2-carboxy-D-arabinitol-1-phosphatase into 2-carboxy-D-arabinitol.[1]

References

[edit]
  1. ^ Servaites JC (1990). "Inhibition of ribulose 1,5-bisphosphate carboxylase/oxygenase by 2-carboxyarabinitol-1-phosphate". Plant Physiol. 92 (4): 867–70. doi:10.1104/pp.92.4.867. PMC 1062388. PMID 16667398.