X-Nico

unusual facts about Phosphatidylinositol 3,4-bisphosphate


Phosphatidylinositol 3,4-bisphosphate

PtdIns(3,4)P2 is dephophosphorylated by the phosphatase INPP4B on the 4 position of the inositol ring and by the TPTE (transmembrane phosphatases with tensin homology) family of phosphatases on the 3 position of the inositol ring.


Fructose 1,6-bisphosphate

Certain neurodegenerative diseases, like Alzheimer's and Parkinson's, have been linked to metal deposits with high iron content, although it is uncertain whether Fenton chemistry plays a substantial role in these diseases, or whether fructose 1,6-bis(phosphate) is capable of mitigating those effects.

Laminopathy

Nitrogen-containing bisphosphate drugs used in the treatment of osteoporosis reduce farnesyldiphosphate production and thus prelamin A farnesylation.

Phosphatidylinositol 3-phosphate

PtdIns3P is dephosphorylated by the myotubularin family of phosphatases, on the D3 position of the inositol ring, and can be converted to PIKfyve.

Phosphatidylinositol 3,5-bisphosphate

Rather, they are brought together by an associated regulator of PIKfyve, called ArPIKfyve/VAC14, that scaffolds a ternary regulatory complex, known as the PAS complex (from the first letters of PIKfyve/ArPIKfyve/Sac3).

PIKfyve attaches the PAS complex onto Rab5GTP/PtdIns3P-enriched endosomal microdomains via its FYVE finger domain that selectively binds PtdIns3P.

Phosphoribulokinase

:ATP + D-ribulose 5-phosphate \rightleftharpoons ADP + D-ribulose 1,5-bisphosphate

TP53-inducible glycolysis and apoptosis regulator

TIGAR acts as a direct regulator of fructose-2,6-bisphosphate levels and hexokinase 2 activity, and this can lead indirectly to many changes within the cell in a chain of biochemical events.


see also