Virus-Induced Chaperone-Enriched (VICE) domains function as nuclear protein quality control centers during HSV-1 infection.
Virus-Induced Chaperone-Enriched (VICE) domains form adjacent to nuclear viral replication compartments (RC) during the early stages of HSV-1 infection. Between 2 and 3 hours post infection at a MOI of 10, host protein quality control machinery such as molecular chaperones (e.g. Hsc70), the 20S prot...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Public Library of Science (PLoS)
2009-10-01
|
| Series: | PLoS Pathogens |
| Online Access: | http://europepmc.org/articles/PMC2752995?pdf=render |
| _version_ | 1818504615091503104 |
|---|---|
| author | Christine M Livingston Marius F Ifrim Ann E Cowan Sandra K Weller |
| author_facet | Christine M Livingston Marius F Ifrim Ann E Cowan Sandra K Weller |
| author_sort | Christine M Livingston |
| collection | DOAJ |
| description | Virus-Induced Chaperone-Enriched (VICE) domains form adjacent to nuclear viral replication compartments (RC) during the early stages of HSV-1 infection. Between 2 and 3 hours post infection at a MOI of 10, host protein quality control machinery such as molecular chaperones (e.g. Hsc70), the 20S proteasome and ubiquitin are reorganized from a diffuse nuclear distribution pattern to sequestration in VICE domains. The observation that VICE domains contain putative misfolded proteins suggests that they may be similar to nuclear inclusion bodies that form under conditions in which the protein quality control machinery is overwhelmed by the presence of misfolded proteins. The detection of Hsc70 in VICE domains, but not in nuclear inclusion bodies, indicates that Hsc70 is specifically reorganized by HSV-1 infection. We hypothesize that HSV-1 infection induces the formation of nuclear protein quality control centers to remodel or degrade aberrant nuclear proteins that would otherwise interfere with productive infection. Detection of proteolytic activity in VICE domains suggests that substrates may be degraded by the 20S proteasome in VICE domains. FRAP analysis reveals that GFP-Hsc70 is dynamically associated with VICE domains, suggesting a role for Hsc70 in scanning the infected nucleus for misfolded proteins. During 42 degrees C heat shock, Hsc70 is redistributed from VICE domains into RC perhaps to remodel viral replication and regulatory proteins that have become insoluble in these compartments. The experiments presented in this paper suggest that VICE domains are nuclear protein quality control centers that are modified by HSV-1 to promote productive infection. |
| first_indexed | 2024-12-10T21:39:29Z |
| format | Article |
| id | doaj.art-0632de2c7dee4785848f141650c9d596 |
| institution | Directory Open Access Journal |
| issn | 1553-7366 1553-7374 |
| language | English |
| last_indexed | 2024-12-10T21:39:29Z |
| publishDate | 2009-10-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS Pathogens |
| spelling | doaj.art-0632de2c7dee4785848f141650c9d5962022-12-22T01:32:33ZengPublic Library of Science (PLoS)PLoS Pathogens1553-73661553-73742009-10-01510e100061910.1371/journal.ppat.1000619Virus-Induced Chaperone-Enriched (VICE) domains function as nuclear protein quality control centers during HSV-1 infection.Christine M LivingstonMarius F IfrimAnn E CowanSandra K WellerVirus-Induced Chaperone-Enriched (VICE) domains form adjacent to nuclear viral replication compartments (RC) during the early stages of HSV-1 infection. Between 2 and 3 hours post infection at a MOI of 10, host protein quality control machinery such as molecular chaperones (e.g. Hsc70), the 20S proteasome and ubiquitin are reorganized from a diffuse nuclear distribution pattern to sequestration in VICE domains. The observation that VICE domains contain putative misfolded proteins suggests that they may be similar to nuclear inclusion bodies that form under conditions in which the protein quality control machinery is overwhelmed by the presence of misfolded proteins. The detection of Hsc70 in VICE domains, but not in nuclear inclusion bodies, indicates that Hsc70 is specifically reorganized by HSV-1 infection. We hypothesize that HSV-1 infection induces the formation of nuclear protein quality control centers to remodel or degrade aberrant nuclear proteins that would otherwise interfere with productive infection. Detection of proteolytic activity in VICE domains suggests that substrates may be degraded by the 20S proteasome in VICE domains. FRAP analysis reveals that GFP-Hsc70 is dynamically associated with VICE domains, suggesting a role for Hsc70 in scanning the infected nucleus for misfolded proteins. During 42 degrees C heat shock, Hsc70 is redistributed from VICE domains into RC perhaps to remodel viral replication and regulatory proteins that have become insoluble in these compartments. The experiments presented in this paper suggest that VICE domains are nuclear protein quality control centers that are modified by HSV-1 to promote productive infection.http://europepmc.org/articles/PMC2752995?pdf=render |
| spellingShingle | Christine M Livingston Marius F Ifrim Ann E Cowan Sandra K Weller Virus-Induced Chaperone-Enriched (VICE) domains function as nuclear protein quality control centers during HSV-1 infection. PLoS Pathogens |
| title | Virus-Induced Chaperone-Enriched (VICE) domains function as nuclear protein quality control centers during HSV-1 infection. |
| title_full | Virus-Induced Chaperone-Enriched (VICE) domains function as nuclear protein quality control centers during HSV-1 infection. |
| title_fullStr | Virus-Induced Chaperone-Enriched (VICE) domains function as nuclear protein quality control centers during HSV-1 infection. |
| title_full_unstemmed | Virus-Induced Chaperone-Enriched (VICE) domains function as nuclear protein quality control centers during HSV-1 infection. |
| title_short | Virus-Induced Chaperone-Enriched (VICE) domains function as nuclear protein quality control centers during HSV-1 infection. |
| title_sort | virus induced chaperone enriched vice domains function as nuclear protein quality control centers during hsv 1 infection |
| url | http://europepmc.org/articles/PMC2752995?pdf=render |
| work_keys_str_mv | AT christinemlivingston virusinducedchaperoneenrichedvicedomainsfunctionasnuclearproteinqualitycontrolcentersduringhsv1infection AT mariusfifrim virusinducedchaperoneenrichedvicedomainsfunctionasnuclearproteinqualitycontrolcentersduringhsv1infection AT annecowan virusinducedchaperoneenrichedvicedomainsfunctionasnuclearproteinqualitycontrolcentersduringhsv1infection AT sandrakweller virusinducedchaperoneenrichedvicedomainsfunctionasnuclearproteinqualitycontrolcentersduringhsv1infection |