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Article

Hetero/Homo-Complexes of Sucrose Transporters May Be a Subtle Mode to Regulate Sucrose Transportation in Grape Berries

by
Yumeng Cai
1,2,
Ling Yin
3,
Jie Wang
1,
Wenjie Dong
1,
Han Gao
1,
Jinxu Xu
1,
Zhefang Deng
1,
Wenrui Tu
1,
Jing Yan
1,
Qingyong Meng
4 and
Yali Zhang
1,*
1
College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
2
Tianjin Key Laboratory of Crop Genetics and Breeding, Crops Research Institute, Tianjin Academy of Agricultural Sciences, Tianjin 300384, China
3
Guangxi Crop Genetic Improvement and Biotechnology Key Lab, Guangxi Academy of Agricultural Sciences, Nanning 530007, China
4
The State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China
*
Author to whom correspondence should be addressed.
Int. J. Mol. Sci. 2021, 22(21), 12062; https://doi.org/10.3390/ijms222112062
Submission received: 29 September 2021 / Revised: 2 November 2021 / Accepted: 4 November 2021 / Published: 8 November 2021
(This article belongs to the Special Issue Sugar Transport in Plants)
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Abstract

The sugar distribution mechanism in fruits has been the focus of research worldwide; however, it remains unclear. In order to elucidate the relevant mechanisms in grape berries, the expression, localization, function, and regulation of three sucrose transporters were studied in three representative Vitis varieties. Both SUC11 and SUC12 expression levels were positively correlated with sugar accumulation in grape berries, whereas SUC27 showed a negative relationship. The alignment analysis and sucrose transport ability of isolated SUCs were determined to reflect coding region variations among V. vinifera, V. amurensis Ruper, and V. riparia, indicating that functional variation existed in one SUT from different varieties. Furthermore, potentially oligomerized abilities of VvSUCs colocalized in the sieve elements of the phloem as plasma membrane proteins were verified. The effects of oligomerization on transport properties were characterized in yeast. VvSUC11 and VvSUC12 are high-affinity/low-capacity types of SUTs that stimulate each other by upregulating Vmax and Km, inhibiting sucrose transport, and downregulating the Km of VvSUC27. Thus, changes in the distribution of different SUTs in the same cell govern functional regulation. The activation and inhibition of sucrose transport could be achieved in different stages and tissues of grape development to achieve an effective distribution of sugar.
Keywords: different varieties; Vitis; sucrose transporter; functional variation; oligomerization; functional regulation different varieties; Vitis; sucrose transporter; functional variation; oligomerization; functional regulation

Share and Cite

MDPI and ACS Style

Cai, Y.; Yin, L.; Wang, J.; Dong, W.; Gao, H.; Xu, J.; Deng, Z.; Tu, W.; Yan, J.; Meng, Q.; et al. Hetero/Homo-Complexes of Sucrose Transporters May Be a Subtle Mode to Regulate Sucrose Transportation in Grape Berries. Int. J. Mol. Sci. 2021, 22, 12062. https://doi.org/10.3390/ijms222112062

AMA Style

Cai Y, Yin L, Wang J, Dong W, Gao H, Xu J, Deng Z, Tu W, Yan J, Meng Q, et al. Hetero/Homo-Complexes of Sucrose Transporters May Be a Subtle Mode to Regulate Sucrose Transportation in Grape Berries. International Journal of Molecular Sciences. 2021; 22(21):12062. https://doi.org/10.3390/ijms222112062

Chicago/Turabian Style

Cai, Yumeng, Ling Yin, Jie Wang, Wenjie Dong, Han Gao, Jinxu Xu, Zhefang Deng, Wenrui Tu, Jing Yan, Qingyong Meng, and et al. 2021. "Hetero/Homo-Complexes of Sucrose Transporters May Be a Subtle Mode to Regulate Sucrose Transportation in Grape Berries" International Journal of Molecular Sciences 22, no. 21: 12062. https://doi.org/10.3390/ijms222112062

APA Style

Cai, Y., Yin, L., Wang, J., Dong, W., Gao, H., Xu, J., Deng, Z., Tu, W., Yan, J., Meng, Q., & Zhang, Y. (2021). Hetero/Homo-Complexes of Sucrose Transporters May Be a Subtle Mode to Regulate Sucrose Transportation in Grape Berries. International Journal of Molecular Sciences, 22(21), 12062. https://doi.org/10.3390/ijms222112062

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