Coding

Part:BBa_K4960004

Designed by: Ruoxi Lv   Group: iGEM23_NUDT-CHINA   (2023-10-10)
Revision as of 18:22, 11 October 2023 by Palpitate (Talk | contribs)


pvc4
Pvc4 is a part of the sheath.

Profile

Name: pvc4
Base Pairs: 1275 bp
Origin: Photorhabdus
Properties: Pvc4 is a part of the sheath.

Usage and Biology

Photorhabdus virulence cassette (PVC) is one group of extracellular Contractile injection systems (CISs) that are cell-puncturing nanodevices and present in both bacteria and archaea.[1]In structure, PVCs are macromolecular complexes containing a rigid tube structure housed in a contractile sheath, which is anchored to a baseplate and sharpened by a spike protein.[2](Figure1)

Figure 1. Schematic of the PVCpnf locus. It contains 16 structural and accessory genes , followed by two payload genes (Pdp1 and Pnf, in red) and four putative regulatory genes (in pink).

The sheath in the pre-contraction state is composed of 23 stacked hexameric rings of sheath proteins, Pvc4, Pvc3, and Pvc2. Among the three, Pvc4 is slightly larger, encircles Pvc5 and forms the first layer of the sheath. Pvc4 is consisted of two major domains (domain I and II). The extra domain of Pvc4, which is smaller than the protrusion domain of Pvc3, lies right below the tail fiber, but no direct interaction is observed. The function of this small protrusion of Pvc4 also remains to be elucidated. In the assembly of the PVC particles, Pvc9 and Pvc4 attach to the initiator tube proteins.to further reinforce the baseplate consisting of Pvc8, Pvc10, Pvc11 and Pvc12.


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]


References

[1]Kreitz J, Friedrich MJ, Guru A, Lash B, Saito M, Macrae RK, Zhang F. Programmable protein delivery with a bacterial contractile injection system. Nature. 2023 Apr;616(7956):357-364. doi: 10.1038/s41586-023-05870-7. Epub 2023 Mar 29.
[2]Jiang F, Li N, Wang X, Cheng J, Huang Y, Yang Y, Yang J, Cai B, Wang YP, Jin Q, Gao N. Cryo-EM Structure and Assembly of an Extracellular Contractile Injection System. Cell. 2019 Apr 4;177(2):370-383.e15. doi: 10.1016/j.cell.2019.02.020. Epub 2019 Mar 21.

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