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Literature summary for 3.1.3.16 extracted from

  • Pato, M.D.
    Properties of the smooth muscle phosphatase from turkey gizzard (1985), Adv. Protein Phosphatases, 1, 367-382.
No PubMed abstract available

Inhibitors

Inhibitors Comment Organism Structure
ATP phosphatases SMP-I and SMP-II Meleagris gallopavo
diphosphate
-
Meleagris gallopavo
F- phosphatase SMP-II Meleagris gallopavo

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.0015 0.0095 myosin light chain
-
Meleagris gallopavo
0.0059
-
heavy meromyosin
-
Meleagris gallopavo

Metals/Ions

Metals/Ions Comment Organism Structure
Mg2+
-
Meleagris gallopavo
Mn2+ activation Meleagris gallopavo

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
150000 165000 phosphatase SMP-I, sedimentation equilibrium centrifugation Meleagris gallopavo
220000 230000 phosphatase SMP-I, gel filtration Meleagris gallopavo

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
phosphoprotein + H2O Meleagris gallopavo role of phosphatases in smooth muscle contractile systems protein + phosphate
-
?

Organism

Organism UniProt Comment Textmining
Meleagris gallopavo
-
-
-

Purification (Commentary)

Purification (Comment) Organism
3 forms Meleagris gallopavo

Source Tissue

Source Tissue Comment Organism Textmining
gizzard
-
Meleagris gallopavo
-

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
heavy meromyosin + H2O
-
Meleagris gallopavo ?
-
?
phosphohistone + H2O
-
Meleagris gallopavo histone + phosphate
-
?
phosphomyosin light chain + H2O
-
Meleagris gallopavo myosin light chain + phosphate
-
?
phosphoprotein + H2O role of phosphatases in smooth muscle contractile systems Meleagris gallopavo protein + phosphate
-
?
phosphoproteins + H2O
-
Meleagris gallopavo proteins + phosphate
-
?
phosphorylase a + H2O
-
Meleagris gallopavo phosphorylase b + phosphate
-
?

Subunits

Subunits Comment Organism
dimer AB, phosphatase 2B, i.e. calcineurin, A: 61000, catalytic subunit, calmodulin and cation binding, SDS-PAGE Meleagris gallopavo
dimer phosphatase SMP-IV Meleagris gallopavo
trimer phosphatase SMP-I Meleagris gallopavo
trimer alpha: 32000-38000, beta: 60000-69000, gamma: 54000-57000, delta: 74000 Meleagris gallopavo

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
7 7.5 phosphatase SMP-IV Meleagris gallopavo
7.5
-
phosphatase SMP-II Meleagris gallopavo
8
-
phosphatase SMP-I Meleagris gallopavo