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Literature summary for 3.2.2.22 extracted from

  • Ling, J.; Liu, W.Y.; Wang, T.P.
    Simultaneous existence of two types of ribosome-inactivating proteins in the seeds of Cinnamonum camphora-characterization of the enzymatic activities of these cytotoxic proteins (1995), Biochim. Biophys. Acta, 1252, 15-22.
    View publication on PubMed

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.0011
-
rRNA pH 7.6, 35°C, 80S ribosome, cinnamomin Cinnamomum camphora
0.0015
-
rRNA pH 7.6, 35°C, naked RNA, cinnamomin Cinnamomum camphora

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
22500
-
1 * 22500, camphorin, SDS-PAGE Cinnamomum camphora
23000
-
type I RIP, camphorin, gel filtration Cinnamomum camphora
30000
-
1 * 33000 + 1 * 30000, cinnamomin, SDS-PAGE Cinnamomum camphora
33000
-
1 * 33000 + 1 * 30000, cinnamomin, SDS-PAGE Cinnamomum camphora
61000
-
type II RIP, cinnamomin, gel filtration Cinnamomum camphora

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
rRNA + H2O Cinnamomum camphora
-
?
-
?

Organism

Organism UniProt Comment Textmining
Cinnamomum camphora
-
camphor tree, 2 types of ribosome-inactivating proteins: camphorin and cinnamomin (3 isoforms)
-

Posttranslational Modification

Posttranslational Modification Comment Organism
glycoprotein camphorin and cinnamomin Cinnamomum camphora

Purification (Commentary)

Purification (Comment) Organism
2 types of ribosome-inactivating proteins: camphorin and cinnamomin Cinnamomum camphora

Source Tissue

Source Tissue Comment Organism Textmining
seed
-
Cinnamomum camphora
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
additional information
-
specific activity 257.8 units for cinnamomin, 213.2 units for camphorin, 1 unit is the amount of protein necessary for inhibiting protein synthesis by 50% in 0.1 ml rabbit-reticulocyte lysate Cinnamomum camphora

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
additional information damages eukaryotic ribosomes by cleaving the N-glycosidic bond at A4324 of the 28 S rRNA Cinnamomum camphora ?
-
?
rRNA + H2O
-
Cinnamomum camphora ?
-
?
supercoiled double-stranded DNA + H2O
-
Cinnamomum camphora nicked and linear forms of DNA
-
?

Subunits

Subunits Comment Organism
dimer 1 * 33000 + 1 * 30000, cinnamomin, SDS-PAGE Cinnamomum camphora
monomer 1 * 22500, camphorin, SDS-PAGE Cinnamomum camphora

Synonyms

Synonyms Comment Organism
camphorin
-
Cinnamomum camphora
cinnamomin
-
Cinnamomum camphora

pI Value

Organism Comment pI Value Maximum pI Value
Cinnamomum camphora camphorin, isoelectric focusing analysis
-
6.1
Cinnamomum camphora cinnamomin 2, isoelectric focusing analysis
-
7.82
Cinnamomum camphora cinnamomin 1, isoelectric focusing analysis
-
8.1