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Literature summary extracted from

  • Szuwart, M.; Starzynska, E.; Pietrowska-Borek, M.; Guranowski, A.
    Calcium-stimulated guanosine--inosine nucleosidase from yellow lupin (Lupinus luteus) (2006), Phytochemistry, 67, 1476-1485.
    View publication on PubMed

Inhibitors

EC Number Inhibitors Comment Organism Structure
3.2.2.2 2'-deoxyguanosine competitive Lupinus luteus
3.2.2.2 2'-methylguanosine competitive Lupinus luteus
3.2.2.2 adenosine competitive Lupinus luteus
3.2.2.2 guanine competitive Lupinus luteus
3.2.2.2 Mn2+
-
Lupinus luteus
3.2.2.2 Zn2+
-
Lupinus luteus

KM Value [mM]

EC Number KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
3.2.2.2 0.0027
-
Inosine pH 4.8 Lupinus luteus
3.2.2.2 0.0027
-
guanosine pH 4.8 Lupinus luteus

Metals/Ions

EC Number Metals/Ions Comment Organism Structure
3.2.2.2 Ca2+ up to 6fold activation by exogenous CaCl2 or Ca(NO3)2 Lupinus luteus

Molecular Weight [Da]

EC Number Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
3.2.2.2 80000
-
gel filtration Lupinus luteus

Organism

EC Number Organism UniProt Comment Textmining
3.2.2.2 Lupinus luteus
-
-
-

Purification (Commentary)

EC Number Purification (Comment) Organism
3.2.2.2
-
Lupinus luteus

Source Tissue

EC Number Source Tissue Comment Organism Textmining
3.2.2.2 cotyledon 5fold increase in activity during seed germination Lupinus luteus
-
3.2.2.2 seed
-
Lupinus luteus
-
3.2.2.2 seedling
-
Lupinus luteus
-

Specific Activity [micromol/min/mg]

EC Number Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
3.2.2.2 9.25
-
pH 4.8 Lupinus luteus

Substrates and Products (Substrate)

EC Number Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
3.2.2.2 1-methylguanosine + H2O
-
Lupinus luteus 1-methylguanine + D-ribose
-
?
3.2.2.2 1-N2-ethenoguanosine + H2O
-
Lupinus luteus 1-N2-ethenoguanine + D-ribose
-
?
3.2.2.2 1-N2-isopropenoguanosine + H2O
-
Lupinus luteus 1-N2-isopropenoguanine + D-ribose
-
?
3.2.2.2 7-methylguanosine + H2O
-
Lupinus luteus 7-methylguanine + D-ribose
-
?
3.2.2.2 guanosine + H2O guanosine is hydrolyzed 12% faster than inosine Lupinus luteus guanine + D-ribose
-
?
3.2.2.2 inosine + H2O guanosine is hydrolyzed 12% faster than inosine Lupinus luteus hypoxanthine + D-ribose
-
?
3.2.2.2 additional information adenosine and xanthosine are poor substrates. No substrate are: 2'-deoxyguanosine, 2'-deoxyinosine, 2'-methylguanosine, pyrimidine nucleosides and 5'-GMP Lupinus luteus ?
-
?

Subunits

EC Number Subunits Comment Organism
3.2.2.2 monomer 1 * 80000, SDS-PAGE Lupinus luteus

Synonyms

EC Number Synonyms Comment Organism
3.2.2.2 guanosine-inosine-preferring nucleoside N-ribohydrolase
-
Lupinus luteus

pH Optimum

EC Number pH Optimum Minimum pH Optimum Maximum Comment Organism
3.2.2.2 4.7 5.5
-
Lupinus luteus

IC50 Value

EC Number IC50 Value IC50 Value Maximum Comment Organism Inhibitor Structure
3.2.2.2 0.0015
-
pH 4.8 Lupinus luteus 2'-deoxyguanosine
3.2.2.2 0.0036
-
pH 4.8 Lupinus luteus 2'-methylguanosine
3.2.2.2 0.0097
-
pH 4.8 Lupinus luteus guanine
3.2.2.2 0.021
-
pH 4.8 Lupinus luteus adenosine
3.2.2.2 0.06
-
pH 4.8 Lupinus luteus Mn2+
3.2.2.2 0.06
-
pH 4.8 Lupinus luteus Zn2+