Part:BBa_K1769000
Dimeric FYVE
Dimeric Hrs FYVE is a small binding molecule that can bind to phosphatidylinositol 3-phosphate (PtdIns(3)P), a receptor that exists on endosome. Since it is more stable then monomeric FYVE, it is widely used to recognize and locate PtdIns(3)P.
Usage and Biology
Many pathogen, such as Plasmodium falciparum<i> that causes malaria and <i>Phytophthora<i> spp. that cause a wide range of plant disaeses,inhibits the immune system of host cell by secreting effector proteins. These effector protein translocate into host cell by binding to a outer membrane receptor, PI3P. This biobrick can not only serve as a useful tool to study the signal transduction pathway of PI3P but can also be a weapon to stop these pathogen's infection.
Introduction
To stop the effector protein secreted by P.infestans from binding to PI3P receptor and translocate into the cell, we designed a competitive inhibitor called FYVE protein domain. This protein domain was obtained from Hrs gene from mice. However, a monomeric FYVE protein domain is not stable in plant cell and the affinity for PI3P is not high enough to compete with effector protien, Avr3, as you can see in figure1. Therefore we designed a linker region to connect the two protein domain together.(Fig2)
=='''Results'''==
We test this part in BY-2 tobacoo cell line. First we construct this part in vector PSAT6. It has a promoter CAMV35S that act as a consitiutive promoter in plat cells. To see if the dimeric FYVE protein domain really binds to PI3P receptor on the endosome of plant cell, we added a Phosphoinositide-3-kinase(PI3K) inhibitor, wortmannin, that can inhibit PI3K from turning PI3P precursor into PI3P.
Sequence and Features
- 10COMPATIBLE WITH RFC[10]
- 12COMPATIBLE WITH RFC[12]
- 21INCOMPATIBLE WITH RFC[21]Illegal BglII site found at 110
Illegal BglII site found at 329 - 23COMPATIBLE WITH RFC[23]
- 25COMPATIBLE WITH RFC[25]
- 1000COMPATIBLE WITH RFC[1000]
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