Part:BBa_K1679029

ftnA

FtnA is a bacterial ferritin with a protein shell is assembled from 24 identical 19.4 kDa FtnA monomers. Its central cavity is around 7.5 nm in diameter and can be loaded with iron when cells grow under iron-rich conditions[1]. The iron is stored in the form of ferrihydrite iron cores normally that with superparamagnetic properties[2]. The iron contained ferritin can generate heat in response to electromagnetic signal[3]. For the reasons above, we design it as our magnetic receiver which can turn electromagnetic signal into heat.

[1]Smith J L. The physiological role of ferritin-like compounds in bacteria[J]. Critical reviews in microbiology, 2004, 30(3): 173-185. [2] Papaefthymiou G C, Viescas A J, Devlin E, et al. Electronic and magnetic characterization of in vivo produced vs. in vitro reconstituted horse spleen ferritin[C]//MRS Proceedings. Cambridge University Press, 2007, 1056: 1056-HH03-27. [3] Stanley S A, Sauer J, Kane R S, et al. Remote regulation of glucose homeostasis in mice using genetically encoded nanoparticles[J]. Nature medicine, 2015, 21(1): 92-98.

Fig.1. Schema of ferritin

Usage and Biology

Figure 2. Native PAGE analysis of mineralized FtnA Gel was stained with (A) potassium ferrocyanide and (B) Coomassie Brilliant Blue R250. Control, HFn; lane 1, concentrated ferritin which purified and concentrated from group 1; lane 2, bacterium sediment of group 1; lane 3, concentrated ferritin which purified and concentrated from group 3; lane 4, bacterium sediment of group 3.

Sequence and Features

Assembly Compatibility:

• 10
  COMPATIBLE WITH RFC[10]
• 12
  COMPATIBLE WITH RFC[12]
• 21
  COMPATIBLE WITH RFC[21]
• 23
  COMPATIBLE WITH RFC[23]
• 25
  COMPATIBLE WITH RFC[25]
• 1000
  COMPATIBLE WITH RFC[1000]