Chapter 23 : Hostile Takeover: Hijacking of Endoplasmic Reticulum Function by T4SS and T3SS Effectors Creates a Niche for Intracellular Pathogens

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Hostile Takeover: Hijacking of Endoplasmic Reticulum Function by T4SS and T3SS Effectors Creates a Niche for Intracellular Pathogens, Page 1 of 2

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Multiple intracellular pathogens utilize the type III secretion system (T3SS) and type IV secretion system (T4SS) to target functions of the host cell’s endoplasmic reticulum (ER). While pathogens such as and have long been known to replicate in association with the ER ( ), the connection of vacuoles containing other intracellular pathogens, such as ( ), spp. ( ), and and its relatives ( ), with the ER has been recognized relatively recently. However, manipulation of ER function is not limited to pathogens that replicate within a vacuole, as cytosolic pathogens such as ( ) and ( ) also target ER-based functions via secreted effectors to promote their intracellular growth.

Citation: Tsai A, English B, Tsolis R. 2019. Hostile Takeover: Hijacking of Endoplasmic Reticulum Function by T4SS and T3SS Effectors Creates a Niche for Intracellular Pathogens, p 291-305. In Sandkvist M, Cascales E, Christie P (ed), Protein Secretion in Bacteria. ASM Press, Washington, DC. doi: 10.1128/microbiolspec.PSIB-0027-2019
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Figure 1

Hijacking of vesicular traffic between ER and Golgi by T4SS effectors of (left) and (right). It has been proposed that like , also intercepts Golgi-ER traffic ( ). Abbreviations: ERGIC, ER-to-Golgi intermediate compartment; ERES, ER exit site; COG, conserved oligomeric Golgi complex.

Citation: Tsai A, English B, Tsolis R. 2019. Hostile Takeover: Hijacking of Endoplasmic Reticulum Function by T4SS and T3SS Effectors Creates a Niche for Intracellular Pathogens, p 291-305. In Sandkvist M, Cascales E, Christie P (ed), Protein Secretion in Bacteria. ASM Press, Washington, DC. doi: 10.1128/microbiolspec.PSIB-0027-2019
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Figure 2

Role of pathogen effectors in tethering of pathogen-containing vacuoles to the ER. Abbreviations: Rtn4, reticulon 4; LCV, large-cell variant; SCV, small-cell variant; RB, reticulate body; EB, elementary body.

Citation: Tsai A, English B, Tsolis R. 2019. Hostile Takeover: Hijacking of Endoplasmic Reticulum Function by T4SS and T3SS Effectors Creates a Niche for Intracellular Pathogens, p 291-305. In Sandkvist M, Cascales E, Christie P (ed), Protein Secretion in Bacteria. ASM Press, Washington, DC. doi: 10.1128/microbiolspec.PSIB-0027-2019
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Secreted pathogen effectors that localize to the ER or modulate its function

Citation: Tsai A, English B, Tsolis R. 2019. Hostile Takeover: Hijacking of Endoplasmic Reticulum Function by T4SS and T3SS Effectors Creates a Niche for Intracellular Pathogens, p 291-305. In Sandkvist M, Cascales E, Christie P (ed), Protein Secretion in Bacteria. ASM Press, Washington, DC. doi: 10.1128/microbiolspec.PSIB-0027-2019

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