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Gene Review:

DPE1 - 4-alpha-glucanotransferase DPE1

Arabidopsis thaliana

Synonyms: MXK3.9, MXK3_9, disproportionating enzyme

Chia, T. et al., Lu, Y. et al., Critchley, J.H. et al.

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High impact information on DPE1

To investigate its fate in the cytosol, we characterised plants with mutations in a gene encoding a putative glucanotransferase (disproportionating enzyme; DPE2), a protein similar to the maltase Q (MalQ) gene product involved in maltose metabolism in bacteria [1].
Using a reverse genetics approach we have isolated a mutant of Arabidopsis thaliana in which the gene encoding this enzyme (DPE1) is disrupted by a T-DNA insertion [2].

Anatomical context of DPE1

Two mutants of Arabidopsis thaliana (L) Heynh. were identified in which the gene encoding a putative amylomaltase enzyme [ disproportionating enzyme 2, DPE2 (DPE1 refers to the plastid version of this enzyme)] was disrupted by a T-DNA insertion [3].

References

A cytosolic glucosyltransferase is required for conversion of starch to sucrose in Arabidopsis leaves at night. Chia, T., Thorneycroft, D., Chapple, A., Messerli, G., Chen, J., Zeeman, S.C., Smith, S.M., Smith, A.M. Plant J. (2004) [Pubmed]
A critical role for disproportionating enzyme in starch breakdown is revealed by a knock-out mutation in Arabidopsis. Critchley, J.H., Zeeman, S.C., Takaha, T., Smith, A.M., Smith, S.M. Plant J. (2001) [Pubmed]
The role of amylomaltase in maltose metabolism in the cytosol of photosynthetic cells. Lu, Y., Sharkey, T.D. Planta (2004) [Pubmed]

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