PPP1R12A

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Identifiers
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External IDsGeneCards: [1]
Orthologs
SpeciesHumanMouse
Entrez
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RefSeq (mRNA)

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RefSeq (protein)

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Protein phosphatase 1 regulatory subunit 12A is an enzyme that in humans is encoded by the PPP1R12A gene.[1][2]

Myosin phosphatase target subunit 1, which is also called the myosin-binding subunit of myosin phosphatase, is one of the subunits of myosin phosphatase. Myosin phosphatase regulates the interaction of actin and myosin downstream of the guanosine triphosphatase Rho. The small guanosine triphosphatase Rho is implicated in myosin light chain (MLC) phosphorylation, which results in contraction of smooth muscle [3] and interaction of actin and myosin in nonmuscle cells. The guanosine triphosphate (GTP)-bound, active form of RhoA (GTP.RhoA) specifically interacted with the myosin-binding subunit (MBS) of myosin phosphatase, which regulates the extent of phosphorylation of MLC. Rho-associated kinase (Rho-kinase), which is activated by GTP. RhoA, phosphorylated MBS and consequently inactivated myosin phosphatase. Overexpression of RhoA or activated RhoA in NIH 3T3 cells increased phosphorylation of MBS and MLC. Thus, Rho appears to inhibit myosin phosphatase through the action of Rho-kinase.[2]

Interactions

PPP1R12A has been shown to interact with Interleukin 16.[4]

References

  1. Takahashi N, Ito M, Tanaka J, Nakano T, Kaibuchi K, Odai H, Takemura K (Nov 1997). "Localization of the gene coding for myosin phosphatase, target subunit 1 (MYPT1) to human chromosome 12q15-q21". Genomics. 44 (1): 150–2. doi:10.1006/geno.1997.4859. PMID 9286714.
  2. 2.0 2.1 "Entrez Gene: PPP1R12A protein phosphatase 1, regulatory (inhibitor) subunit 12A".
  3. Michael P. Walsh; et all. "Thromboxane A2-induced contraction of rat caudal arterial smooth muscle involves activation of Ca2+ entry and Ca2+sensitization: Rho-associated kinase-mediated phosphorylation of MYPT1 at Thr-855 but not Thr-697" (PDF). Archived from the original (PDF) on 2011-07-13.
  4. Bannert, Norbert; Vollhardt Karin; Asomuddinov Bakhtier; Haag Marion; König Herbert; Norley Stephen; Kurth Reinhard (Oct 2003). "PDZ Domain-mediated interaction of interleukin-16 precursor proteins with myosin phosphatase targeting subunits". J. Biol. Chem. United States. 278 (43): 42190–9. doi:10.1074/jbc.M306669200. ISSN 0021-9258. PMID 12923170.

Further reading

External links