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Genome-Wide Identification, Expression, and Functional Analysis of the Alkaline/Neutral Invertase Gene Family in Pepper.


ABSTRACT: Alkaline/neutral invertase (NINV) proteins irreversibly cleave sucrose into fructose and glucose, and play important roles in carbohydrate metabolism and plant development. To investigate the role of NINVs in the development of pepper fruits, seven NINV genes (CaNINV1-7) were identified. Phylogenetic analysis revealed that the CaNINV family could be divided into ? and ? groups. CaNINV1-6 had typical conserved regions and similar protein structures to the NINVs of other plants, while CaNINV7 lacked amino acid sequences at the C-terminus and N-terminus ends. An expression analysis of the CaNINV genes in different tissues demonstrated that CaNINV5 is the dominant NINV in all the examined tissues (root, stem, leaf, bud, flower, and developmental pepper fruits stage). Notably, the expression of CaNINV5 was found to gradually increase at the pre-breaker stages, followed by a decrease at the breaker stages, while it maintained a low level at the post-breaker stages. Furthermore, the invertase activity of CaNINV5 was identified by functional complementation of the invertase-deficient yeast strain SEY2102, and the optimum pH of CaNINV5 was found to be ~7.5. The gene expression and enzymatic activity of CaNINV5 suggest that it might be the main NINV enzyme for hydrolysis of sucrose during pepper fruit development.

SUBMITTER: Shen LB 

PROVIDER: S-EPMC5796173 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature

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Genome-Wide Identification, Expression, and Functional Analysis of the Alkaline/Neutral Invertase Gene Family in Pepper.

Shen Long-Bin LB   Yao Yuan Y   He Huang H   Qin Yu-Ling YL   Liu Zi-Ji ZJ   Liu Wei-Xia WX   Qi Zhi-Qiang ZQ   Yang Li-Jia LJ   Cao Zhen-Mu ZM   Yang Yan Y  

International journal of molecular sciences 20180111 1


Alkaline/neutral invertase (NINV) proteins irreversibly cleave sucrose into fructose and glucose, and play important roles in carbohydrate metabolism and plant development. To investigate the role of NINVs in the development of pepper fruits, seven <i>NINV</i> genes (<i>CaNINV1-7</i>) were identified. Phylogenetic analysis revealed that the CaNINV family could be divided into α and β groups. CaNINV1-6 had typical conserved regions and similar protein structures to the NINVs of other plants, whil  ...[more]

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