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ROLE AND REGULATION OF SUCROSE-PHOSPHATE SYNTHASE IN HIGHER PLANTS
Abstract
▪ Abstract Sucrose-phosphate synthase (SPS; E.C. 2.4.1.14) is the plant enzyme thought to play a major role in sucrose biosynthesis. In photosynthetic and nonphotosynthetic tissues, SPS is regulated by metabolites and by reversible protein phosphorylation. In leaves, phosphorylation modulates SPS activity in response to light/dark signals and end-product accumulation. SPS is phosphorylated on multiple seryl residues in vivo, and the major regulatory phosphorylation site involved is Ser158 in spinach leaves and Ser162 in maize leaves. Regulation of the enzymatic activity of SPS appears to involve calcium, metabolites, and novel “coarse” control of the protein phosphatase that activates SPS. Activation of SPS also occurs during osmotic stress of leaf tissue in darkness, which may function to facilitate sucrose formation for osmoregulation. Manipulation of SPS expression in vivo confirms the role of this enzyme in the control of sucrose biosynthesis.
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Citations
Cited by
Lawlor, D. W., & Cornic, G. (2002) · Plant, Cell & Environment · doi:10.1046/j.0016-8025.2001.00814.x · Cited by 1,994
STITT, M., & KRAPP, A. (1999) · Plant, Cell & Environment · doi:10.1046/j.1365-3040.1999.00386.x · Cited by 1,044
Lawlor, D. W., & Tezara, W. (2009) · Annals of Botany · doi:10.1093/aob/mcn244 · Cited by 852
Grain filling of cereals under soil drying
Yang, J., & Zhang, J. (2006) · New Phytologist · doi:10.1111/j.1469-8137.2005.01597.x · Cited by 787
Phosphoproteomics of the Arabidopsis Plasma Membrane and a New Phosphorylation Site Database[W]
Nühse, T. S., Stensballe, A., Jensen, O. N., & Peck, S. C. (2004) · The Plant Cell · doi:10.1105/tpc.104.023150 · Cited by 478
Metadata
- Authors
- Huber, S. C., & Huber, J. L.
- Venue
- Annual Review of Plant Physiology and Plant Molecular Biology
- Publisher
- Annual Reviews
- Published
- 1996-06
- Volume
- 47
- Issue
- 1
- Pages
- 431-444
- ISSN
- 1040-2519 (ISSN-L)
- OpenAlex
- W2138672323
- Cited by
- 643
- References
- 0
- FWCI
- 25.59
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: ROLE AND REGULATION OF SUCROSE-PHOSPHATE SYNTHASE IN HIGHER PLANTS. https://app.cochat.ai/papers/10.1146/annurev.arplant.47.1.431
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- Huber, S. C., & Huber, J. L. (1996). ROLE AND REGULATION OF SUCROSE-PHOSPHATE SYNTHASE IN HIGHER PLANTS. Annual Review of Plant Physiology and Plant Molecular Biology. https://doi.org/10.1146/annurev.arplant.47.1.431
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