Colicin E3

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Colicin E3 is a type of Colicin, a bacteriocin made by E. Coli which acts against other nearby E. Coli to kill them with its 16s rRNase activity; it digests the 16s ribosomal subunit, ultimately leading to the death of the cell.

Contents

Synthesis and release

Mechanism of uptake

PDB ID 1ujw

Drag the structure with the mouse to rotate
1ujw, resolution 2.75Å ()
Ligands: , , , ,
Related: 1nqe, 1jch
Resources: FirstGlance, OCA, PDBsum, RCSB
Coordinates: save as pdb, mmCIF, xml


ColE3 initially binds to the BtuB vitamin B12 receptor. Formation of this complex leads to the unfolding of the N terminal receptor binding coiled-coil domain of ColE3. [1]

The structure shows the complex formed between BtuB and the ColE3 translocation domain [2]

Killing Activities

References

  1. ↑ Masi M, Vuong P, Humbard M, Malone K, Misra R. Initial steps of colicin E1 import across the outer membrane of Escherichia coli. J Bacteriol. 2007 Apr;189(7):2667-76. Epub 2007 Feb 2. PMID:17277071 doi:10.1128/JB.01448-06
  2. ↑ Kurisu G, Zakharov SD, Zhalnina MV, Bano S, Eroukova VY, Rokitskaya TI, Antonenko YN, Wiener MC, Cramer WA. The structure of BtuB with bound colicin E3 R-domain implies a translocon. Nat Struct Biol. 2003 Nov;10(11):948-54. Epub 2003 Oct 5. PMID:14528295 doi:10.1038/nsb997

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Gemma McGoldrick

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