Escherichia coli K-12 substr. MG1655 Compound Class: maltose

Synonyms: α-D-glucopyranose-(1→4)-D-glucopyranose, maltose

Superclasses: all carbohydrates a carbohydrate a glycan an oligosaccharide a disaccharide
all carbohydrates a carbohydrate a glycan an oligosaccharide a malto-oligosaccharide a linear malto-oligosaccharide

Maltose is composed of two glucose molecules linked by an α 1,4-glycosidic linkage. Maltose is produced by the hydrolysis of starch and similar compounds, and can be hydrolyzed to glucose by the enzyme maltase.

maltose compound structure

maltose compound structure

Chemical Formula: C12H22O11

Citations: [Stryer88]

Molecular Weight: 342.3 Daltons

Monoisotopic Molecular Weight: 342.11621154930003 Daltons


InChI: InChI=1S/C12H22O11/c13-1-3-5(15)6(16)9(19)12(22-3)23-10-4(2-14)21-11(20)8(18)7(10)17/h3-20H,1-2H2/t3-,4-,5-,6+,7-,8-,9-,10-,11?,12-/m1/s1


Unification Links: CAS:69-79-4 , ChEBI:17306 , ChemSpider:6019

Standard Gibbs Free Energy of Change Formation (ΔfG in kcal/mol): -363.9 [Forsythe97]

Reactions known to consume the compound:

glycogen degradation I (bacterial) :
maltotetraose + D-glucopyranose ← maltotriose + maltose

Reactions known to produce the compound:

glycogen degradation I (bacterial) :
maltotriose + H2O → maltose + D-glucopyranose

Reactions known to both consume and produce the compound:

Not in pathways:
maltose + acetyl-CoA ↔ acetylmaltose + coenzyme A

In Reactions of unknown directionality:

Not in pathways:
maltohexaose + β-D-glucopyranose = maltopentaose + maltose
maltopentaose + D-glucopyranose = maltotetraose + maltose
maltose + maltohexaose = maltoheptaose + β-D-glucopyranose

In Transport reactions:
maltose[extracellular space]maltose[periplasmic space] ,
maltose[periplasmic space] + ATP + H2O → maltose[cytosol] + ADP + phosphate + H+ ,
maltose[periplasmic space]maltose[cytosol]

This compound has been characterized as an alternative substrate of the following enzymes: maltodextrin glucosidase , aldose sugar dehydrogenase

In Growth Media: PMA carbon source test + maltose


Forsythe97: Forsythe RG, Karp PD, Mavrovouniotis ML (1997). "Estimation of Equilibrium Constants Using Automated Group Contribution Methods." CABIOS 13(5):537-543.

Stryer88: Stryer L "Biochemistry." WH Freeman and Co., 3rd edition, New York, 1988.

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Please cite the following article in publications resulting from the use of EcoCyc: Nucleic Acids Research 41:D605-12 2013
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