Protein phosphatase 1 (PP1) is a post-translational regulator of the mammalian circadian clock.
Circadian clocks coordinate the timing of important biological processes. Interconnected transcriptional and post-translational feedback loops based on a set of clock genes generate and maintain these rhythms with a period of about 24 hours. Many clock proteins undergo circadian cycles of post-trans...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Public Library of Science (PLoS)
2011-01-01
|
| Series: | PLoS ONE |
| Online Access: | http://europepmc.org/articles/PMC3119686?pdf=render |
| _version_ | 1818670070862184448 |
|---|---|
| author | Isabelle Schmutz Sabrina Wendt Anna Schnell Achim Kramer Isabelle M Mansuy Urs Albrecht |
| author_facet | Isabelle Schmutz Sabrina Wendt Anna Schnell Achim Kramer Isabelle M Mansuy Urs Albrecht |
| author_sort | Isabelle Schmutz |
| collection | DOAJ |
| description | Circadian clocks coordinate the timing of important biological processes. Interconnected transcriptional and post-translational feedback loops based on a set of clock genes generate and maintain these rhythms with a period of about 24 hours. Many clock proteins undergo circadian cycles of post-translational modifications. Among these modifications, protein phosphorylation plays an important role in regulating activity, stability and intracellular localization of clock components. Several protein kinases were characterized as regulators of the circadian clock. However, the function of protein phosphatases, which balance phosphorylation events, in the mammalian clock mechanism is less well understood. Here, we identify protein phosphatase 1 (PP1) as regulator of period and light-induced resetting of the mammalian circadian clock. Down-regulation of PP1 activity in cells by RNA interference and in vivo by expression of a specific inhibitor in the brain of mice tended to lengthen circadian period. Moreover, reduction of PP1 activity in the brain altered light-mediated clock resetting behavior in mice, enhancing the phase shifts in either direction. At the molecular level, diminished PP1 activity increased nuclear accumulation of the clock component PER2 in neurons. Hence, PP1, may reduce PER2 phosphorylation thereby influencing nuclear localization of this protein. This may at least partially influence period and phase shifting properties of the mammalian circadian clock. |
| first_indexed | 2024-12-17T07:02:16Z |
| format | Article |
| id | doaj.art-7ea007d2a4694bbf82c2ba5beb63b0a7 |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-17T07:02:16Z |
| publishDate | 2011-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-7ea007d2a4694bbf82c2ba5beb63b0a72022-12-21T21:59:15ZengPublic Library of Science (PLoS)PLoS ONE1932-62032011-01-0166e2132510.1371/journal.pone.0021325Protein phosphatase 1 (PP1) is a post-translational regulator of the mammalian circadian clock.Isabelle SchmutzSabrina WendtAnna SchnellAchim KramerIsabelle M MansuyUrs AlbrechtCircadian clocks coordinate the timing of important biological processes. Interconnected transcriptional and post-translational feedback loops based on a set of clock genes generate and maintain these rhythms with a period of about 24 hours. Many clock proteins undergo circadian cycles of post-translational modifications. Among these modifications, protein phosphorylation plays an important role in regulating activity, stability and intracellular localization of clock components. Several protein kinases were characterized as regulators of the circadian clock. However, the function of protein phosphatases, which balance phosphorylation events, in the mammalian clock mechanism is less well understood. Here, we identify protein phosphatase 1 (PP1) as regulator of period and light-induced resetting of the mammalian circadian clock. Down-regulation of PP1 activity in cells by RNA interference and in vivo by expression of a specific inhibitor in the brain of mice tended to lengthen circadian period. Moreover, reduction of PP1 activity in the brain altered light-mediated clock resetting behavior in mice, enhancing the phase shifts in either direction. At the molecular level, diminished PP1 activity increased nuclear accumulation of the clock component PER2 in neurons. Hence, PP1, may reduce PER2 phosphorylation thereby influencing nuclear localization of this protein. This may at least partially influence period and phase shifting properties of the mammalian circadian clock.http://europepmc.org/articles/PMC3119686?pdf=render |
| spellingShingle | Isabelle Schmutz Sabrina Wendt Anna Schnell Achim Kramer Isabelle M Mansuy Urs Albrecht Protein phosphatase 1 (PP1) is a post-translational regulator of the mammalian circadian clock. PLoS ONE |
| title | Protein phosphatase 1 (PP1) is a post-translational regulator of the mammalian circadian clock. |
| title_full | Protein phosphatase 1 (PP1) is a post-translational regulator of the mammalian circadian clock. |
| title_fullStr | Protein phosphatase 1 (PP1) is a post-translational regulator of the mammalian circadian clock. |
| title_full_unstemmed | Protein phosphatase 1 (PP1) is a post-translational regulator of the mammalian circadian clock. |
| title_short | Protein phosphatase 1 (PP1) is a post-translational regulator of the mammalian circadian clock. |
| title_sort | protein phosphatase 1 pp1 is a post translational regulator of the mammalian circadian clock |
| url | http://europepmc.org/articles/PMC3119686?pdf=render |
| work_keys_str_mv | AT isabelleschmutz proteinphosphatase1pp1isaposttranslationalregulatorofthemammaliancircadianclock AT sabrinawendt proteinphosphatase1pp1isaposttranslationalregulatorofthemammaliancircadianclock AT annaschnell proteinphosphatase1pp1isaposttranslationalregulatorofthemammaliancircadianclock AT achimkramer proteinphosphatase1pp1isaposttranslationalregulatorofthemammaliancircadianclock AT isabellemmansuy proteinphosphatase1pp1isaposttranslationalregulatorofthemammaliancircadianclock AT ursalbrecht proteinphosphatase1pp1isaposttranslationalregulatorofthemammaliancircadianclock |