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IUBMB CommentsA 1,6-alpha-D-mannan backbone remains after action on yeast mannan. This is further attacked, but slowly.
The expected taxonomic range for this enzyme is: Bacteria, Eukaryota
Synonyms
alpha-D-mannan mannohydrolase, exo-1,2-1,3-alpha-mannosidase,
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alpha-D-mannan mannohydrolase
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exo-1,2-1,3-alpha-mannosidase
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Manalpha(1-6)[Manalpha(1-2)]Manalpha(1-6)Manalpha(1-6)Manalpha(1-6)[Manalpha(1-3)]Manalpha(1-6)Manalpha + 2 H2O = Manalpha(1-6)Manalpha(1-6)Manalpha(1-6)Manalpha(1-6)Manalpha(1-6)Manalpha + 2 alpha-D-mannopyranose
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hydrolysis of O-glycosyl bond
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(1->2)-(1->3)-alpha-D-mannan mannohydrolase
A 1,6-alpha-D-mannan backbone remains after action on yeast mannan. This is further attacked, but slowly.
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mannan + H2O
mannose + 1,6-alpha-D-mannan-backbone
oligosaccharides from mannan + H2O
mannose + ?
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mannan + H2O
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mannan + H2O
mannose + 1,6-alpha-D-mannan-backbone
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further slow degradation
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mannan + H2O
mannose + 1,6-alpha-D-mannan-backbone
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further slow degradation
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mannan + H2O
mannose + 1,6-alpha-D-mannan-backbone
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further slow degradation
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mannan + H2O
mannose + 1,6-alpha-D-mannan-backbone
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further slow degradation
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mannan + H2O
mannose + 1,6-alpha-D-mannan-backbone
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further slow degradation
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mannan + H2O
mannose + 1,6-alpha-D-mannan-backbone
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further slow degradation
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mannan + H2O
mannose + 1,6-alpha-D-mannan-backbone
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further slow degradation
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mannan + H2O
mannose + 1,6-alpha-D-mannan-backbone
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further slow degradation
?
mannan + H2O
mannose + 1,6-alpha-D-mannan-backbone
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further slow degradation
?
mannan + H2O
mannose + 1,6-alpha-D-mannan-backbone
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further slow degradation
?
mannan + H2O
mannose + 1,6-alpha-D-mannan-backbone
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further slow degradation
?
mannan + H2O
mannose + 1,6-alpha-D-mannan-backbone
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further slow degradation
?
mannan + H2O
mannose + 1,6-alpha-D-mannan-backbone
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further slow degradation
?
mannan + H2O
mannose + 1,6-alpha-D-mannan-backbone
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further slow degradation
?
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mannan + H2O
?
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Ca2+
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restores activity after EDTA treatment
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0.01
Mannan
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based on molecular weight of 22000 from intact S. cerevisiae mannan
0.5 - 2
oligosaccharides from mannan
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molecular weight of mannan multiplied by factor 50 describes molar concentration of side chains in the mannan molecule
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6
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6.5
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5 - 8
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M-30
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brenda
M-30
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brenda
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brenda
M-25
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brenda
M-25
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brenda
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brenda
M-15
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brenda
M-15
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brenda
M-03
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brenda
M-03
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brenda
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brenda
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brenda
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brenda
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60
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completely inactivated
30
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stable for 3 h
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0°C, unstable on storage
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20°C, one drop of toluene, 1 day, 15% decline in activity
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Preston, J.F.; Lapis, E.; Gander, J.E.
The appearence of exo-alpha-mannosidase in cultures of Penicillium charlesii
Arch. Microbiol.
88
71-76
1973
Penicillium charlesii
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Jones, G.H.; Ballou, C.E.
Studies on the structure of yeast mannan. II. Mode of action of the Arthrobacter alpha-mannosidase on yeast mannan
J. Biol. Chem.
244
1052-1059
1969
Arthrobacter sp.
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Jones, G.H.; Ballou, C.E.
Studies on the structure of yeast mannan. I. Purification and some properties of an alpha-mannosidase from an Arthrobacter species
J. Biol. Chem.
244
1043-1051
1969
Arthrobacter sp.
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John, E.; Hampel W.A.
Enzyme formation by a yeast cell wall lytic Arthrobacter species: formation of alpha-mannanase
Appl. Microbiol. Biotechnol.
35
60-64
1991
Arthrobacter sp.
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Wong-Madden S.T.; Landry D.
Purification and characterization of novel glycosidases from the bacterial genus Xanthomonas
Glycobiology
5
19-28
1995
Xanthomonas phaseoli pv. manihotis
brenda
Malek M.A.; Berry D.R.
Isolation and partial characterization of yeast mannan hydrolyzing enzymes from bacterial isolates
Microbios
83
229-241
1995
Acinetobacter sp., Arthrobacter sp., Bacillus sp. (in: Bacteria), Streptomyces sp., Pseudomonas sp., Acinetobacter sp. M-30, Streptomyces sp. M-03, Pseudomonas sp. M-15, Bacillus sp. (in: Bacteria) M-25
brenda
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3.2.1.77 mannan 1,2-(1,3)-alpha-mannosidase
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