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Li J, Zhang M, Li X, Khan A, Kumar S, Allan AC, Lin-Wang K, Espley RV, Wang C, Wang R, Xue C, Yao G, Qin M, Sun M, Tegtmeier R, Liu H, Wei W, Ming M, Zhang S, Zhao K, Song B, Ni J, An J, Korban SS, Wu J. Pear genetics: Recent advances, new prospects, and a roadmap for the future. HORTICULTURE RESEARCH 2022; 9:uhab040. [PMID: 35031796 PMCID: PMC8778596 DOI: 10.1093/hr/uhab040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 08/23/2021] [Accepted: 08/25/2021] [Indexed: 06/14/2023]
Abstract
Pear, belonging to the genus Pyrus, is one of the most economically important temperate fruit crops. Pyrus is an important genus of the Rosaceae family, subfamily Maloideae, and has at least 22 different species with over 5000 accessions maintained or identified worldwide. With the release of draft whole-genome sequences for Pyrus, opportunities for pursuing studies on the evolution, domestication, and molecular breeding of pear, as well as for conducting comparative genomics analyses within the Rosaceae family, have been greatly expanded. In this review, we highlight key advances in pear genetics, genomics, and breeding driven by the availability of whole-genome sequences, including whole-genome resequencing efforts, pear domestication, and evolution. We cover updates on new resources for undertaking gene identification and molecular breeding, as well as for pursuing functional validation of genes associated with desirable economic traits. We also explore future directions for "pear-omics".
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Affiliation(s)
- Jiaming Li
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China
| | - Mingyue Zhang
- State Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, Shandong 271018, China
| | - Xiaolong Li
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China
| | - Awais Khan
- Plant Pathology & Plant-Microbe Biology Section, Cornell University, Geneva, NY 14456, USA
| | - Satish Kumar
- Hawke’s Bay Research Centre, The New Zealand Institute for Plant and Food Research Limited, Havelock North 4157, New Zealand
| | - Andrew Charles Allan
- The New Zealand Institute for Plant and Food Research Limited, Auckland 1142, New Zealand
| | - Kui Lin-Wang
- The New Zealand Institute for Plant and Food Research Limited, Auckland 1142, New Zealand
| | - Richard Victor Espley
- The New Zealand Institute for Plant and Food Research Limited, Auckland 1142, New Zealand
| | - Caihong Wang
- College of Horticulture, Qingdao Agricultural University, Qingdao, 266109, China
| | - Runze Wang
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China
| | - Cheng Xue
- State Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, Shandong 271018, China
| | - Gaifang Yao
- School of Food and Biological Engineering, Hefei University of Technology, 230009 Hefei, China
| | - Mengfan Qin
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China
| | - Manyi Sun
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China
| | - Richard Tegtmeier
- Plant Pathology & Plant-Microbe Biology Section, Cornell University, Geneva, NY 14456, USA
| | - Hainan Liu
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China
| | - Weilin Wei
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China
| | - Meiling Ming
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China
| | - Shaoling Zhang
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China
| | - Kejiao Zhao
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China
| | - Bobo Song
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China
| | - Jiangping Ni
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China
| | - Jianping An
- State Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, Shandong 271018, China
| | - Schuyler S Korban
- Department of Natural Resources & Environmental Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Jun Wu
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China
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Yu W, Peng F, Wang W, Liang J, Xiao Y, Yuan X. SnRK1 phosphorylation of SDH positively regulates sorbitol metabolism and promotes sugar accumulation in peach fruit. TREE PHYSIOLOGY 2021; 41:1077-1086. [PMID: 33576402 PMCID: PMC8190949 DOI: 10.1093/treephys/tpaa163] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Accepted: 11/11/2020] [Indexed: 05/07/2023]
Abstract
Fruit quality depends largely on the type and amount of sugar accumulated in the fruit. In peach [Prunus persica (L.) Batsch], sorbitol is the main photosynthetic product and plays a crucial role in sugar metabolism. As a conserved energy sensor, SNF1-related kinase 1 (SnRK1) is involved in the regulation of carbon metabolism. In this study, SnRK1 was able to respond to induction by treatment with exogenous trehalose and sorbitol on 'Ruipan 17' peach fruit. After treatment with 100-mM trehalose for 3 h, the SnRK1 activity decreased by 18% and the activities of sorbitol dehydrogenase (SDH) and sucrose synthase (SS) also decreased significantly, but sucrose phosphate synthase (SPS) activity increased significantly; whereas sorbitol treatment under the same conditions resulted in a 12.6% increase in SnRK1 activity and the activities of SDH and SS synthase also increased significantly, compared with the control. The contents of glucose, fructose and sucrose in peach fruit increased significantly after 3 h of sorbitol treatment. In addition, the interactions between PpSnRK1α and enzymes PpSDH and PpSPS were confirmed by yeast two-hybrid method and the phosphorylation of PpSnRK1α and PpSDH was detected in vitro. Taken together, these results suggest that SnRK1 promotes sorbitol metabolism by activating SDH and it also regulates the activities of SS and SPS that enhance sucrose accumulation in peach fruit. SnRK1 protein kinase is involved in sugar metabolism and has the potential to be used for improving fruit quality.
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Affiliation(s)
- Wen Yu
- Key Laboratory of Biology and Molecular Biology in University of Shandong, College of Biological and Agricultural Engineering, Weifang University, Weifang, Shandong 261061, China
- College of Horticulture Science and Engineering, State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an, Shandong 271000, China
| | | | - Wenru Wang
- College of Horticulture Science and Engineering, State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an, Shandong 271000, China
| | - Jiahui Liang
- College of Horticulture Science and Engineering, State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an, Shandong 271000, China
| | | | - Xuefeng Yuan
- College of Plant Protection, Shandong Agricultural University, Tai’an, Shandong 271000, China
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Hartman MD, Minen RI, Iglesias AA, Figueroa CM. Cofactor Specificity Switch on Peach Glucitol Dehydrogenase. Biochemistry 2019; 58:1287-1294. [PMID: 30726068 DOI: 10.1021/acs.biochem.8b01240] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Most oxidoreductases that use NAD+ or NADP+ to transfer electrons in redox reactions display a strong preference for the cofactor. The catalytic efficiency of peach glucitol dehydrogenase (GolDHase) for NAD+ is 1800-fold higher than that for NADP+. Herein, we combined structural and kinetic data to reverse the cofactor specificity of this enzyme. Using site-saturation mutagenesis, we obtained the D216A mutant, which uses both NAD+ and NADP+, although with different catalytic efficiencies (1000 ± 200 and 170 ± 30 M-1 s-1, respectively). This mutant was used as a template to introduce further mutations by site-directed mutagenesis, using information from the fruit fly NADP-dependent GolDHase. The D216A/V217R/D218S triple mutant displayed a 2-fold higher catalytic efficiency with NADP+ than with NAD+. Overall, our results indicate that the triple mutant has the potential to be used for metabolic and cellular engineering and for cofactor recycling in industrial processes.
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Affiliation(s)
- Matías D Hartman
- Instituto de Agrobiotecnología del Litoral, UNL, CONICET, FBCB , 3000 Santa Fe , Argentina
| | - Romina I Minen
- Instituto de Agrobiotecnología del Litoral, UNL, CONICET, FBCB , 3000 Santa Fe , Argentina
| | - Alberto A Iglesias
- Instituto de Agrobiotecnología del Litoral, UNL, CONICET, FBCB , 3000 Santa Fe , Argentina
| | - Carlos M Figueroa
- Instituto de Agrobiotecnología del Litoral, UNL, CONICET, FBCB , 3000 Santa Fe , Argentina
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Cai J, Chen T, Zhang Z, Li B, Qin G, Tian S. Metabolic Dynamics During Loquat Fruit Ripening and Postharvest Technologies. FRONTIERS IN PLANT SCIENCE 2019; 10:619. [PMID: 31178876 PMCID: PMC6543895 DOI: 10.3389/fpls.2019.00619] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2018] [Accepted: 04/25/2019] [Indexed: 05/21/2023]
Abstract
Loquat is an important fruit widely cultivated worldwide with high commercial value. During loquat fruit development, ripening, and storage, many important metabolites undergo dramatic changes, resulting in accumulation of a diverse mixture of nutrients. Given the value of loquat fruit, significant progresses have been achieved in understanding the metabolic changes during fruit ripening and storage, as well as postharvest technologies applied in loquat fruit in recent years. The objective of the present review is to summarize currently available knowledge and provide new references for improving loquat fruit quality.
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Affiliation(s)
- Jianghua Cai
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, China
- College of Life Science, University of Chinese Academy of Sciences, Beijing, China
| | - Tong Chen
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, China
- Key Laboratory of Post-Harvest Handing of Fruits, Ministry of Agriculture, Beijing, China
| | - Zhanquan Zhang
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, China
| | - Boqiang Li
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, China
| | - Guozheng Qin
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, China
- Key Laboratory of Post-Harvest Handing of Fruits, Ministry of Agriculture, Beijing, China
| | - Shiping Tian
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, China
- College of Life Science, University of Chinese Academy of Sciences, Beijing, China
- Key Laboratory of Post-Harvest Handing of Fruits, Ministry of Agriculture, Beijing, China
- *Correspondence: Shiping Tian,
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Zhang W, Zhang X, Wang Y, Zhang N, Guo Y, Ren X, Zhao Z. Potassium fertilization arrests malate accumulation and alters soluble sugar metabolism in apple fruit. Biol Open 2018; 7:bio024745. [PMID: 30404903 PMCID: PMC6310881 DOI: 10.1242/bio.024745] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Accepted: 10/31/2018] [Indexed: 12/28/2022] Open
Abstract
Effects of different potassium (K) levels, which were K0 (no fertilizer), K1 (71.5 g KCl plant-1 year-1), K2 (286.7 g KCl plant-1 year-1), and K3 (434 g KCl plant-1 year-1), were evaluated based on sugar and organic acid metabolism levels from 70-126 days after bloom (DAB) in the developing fruit of potted five-year-old apple (Malus domestica, Borkh.) trees. The results indicate that K fertilization promoted greater fruit mass, higher Ca2+ and soluble solid levels, and lower titratable acid levels, as well as increased pH values at harvest. With the application of different levels of K fertilizer, fructose, sorbitol, glucose and sucrose accumulation rates significantly changed during fruit development. Fruit in the K2 group had higher fructose, sucrose and glucose levels than those in other treatment groups at 126 DAB. These changes in soluble sugar are related to the activity of metabolic enzymes. Sucrose synthase (SS) and sorbitol dehydrogenase (SDH) activity in the K2 treated fruit was significantly higher than those in other treatment groups from 70-126 DAB. Malate levels in K-supplemented fruit were notably lower than those in non K-supplemented fruit, and K3 treated fruit had the lowest malate levels during fruit development. Cytosolic malic enzyme (ME) and phosphoenolpyruvate carboxykinase (PEPCK) activity significantly increased in fruit under the K2 treatment during 112-126 DAB and 98-126 DAB, respectively. In addition, Ca2+ concentration increased with increasing K fertilization levels, which promoted a maximum of 11.72 mg g-1 dry weight in apple fruit. These results show that K levels can alter soluble sugar and malate levels due to the interaction between sugars and acid-metabolic enzymes in fruit.
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Affiliation(s)
- Wen Zhang
- College of Horticulture, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Xian Zhang
- College of Horticulture, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Yufei Wang
- College of Horticulture, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Nishang Zhang
- Key Laboratory of Horticulture Plant Biology and Germplasm Innovation in Northwest China, Ministry of Agriculture, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Yanping Guo
- College of Horticulture, Northwest A&F University, Yangling 712100, Shaanxi, China
- Key Laboratory of Horticulture Plant Biology and Germplasm Innovation in Northwest China, Ministry of Agriculture, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Xiaolin Ren
- College of Horticulture, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Zhengyang Zhao
- Shaanxi Engineering Research Center for Apple, Northwest A&F University, Yangling 712100, Shaanxi, China
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Reuscher S, Fukao Y, Morimoto R, Otagaki S, Oikawa A, Isuzugawa K, Shiratake K. Quantitative Proteomics-Based Reconstruction and Identification of Metabolic Pathways and Membrane Transport Proteins Related to Sugar Accumulation in Developing Fruits of Pear (Pyrus communis). PLANT & CELL PHYSIOLOGY 2016; 57:505-18. [PMID: 26755692 DOI: 10.1093/pcp/pcw004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Accepted: 01/05/2016] [Indexed: 05/09/2023]
Abstract
During their 6 month development, pear (Pyrus communis) fruits undergo drastic changes in their morphology and their chemical composition. To gain a better understanding of the metabolic pathways and transport processes active during fruit development, we performed a time-course analysis using mass spectrometry (MS)-based protein identification and quantification of fruit flesh tissues. After pre-fractionation of the samples, 2,841 proteins were identified. A principal component analysis (PCA) separated the samples from seven developmental stages into three distinct clusters representing the early, mid and late developmental phase. Over-representation analysis of proteins characteristic of each developmental phase revealed both expected and novel biological processes relevant at each phase. A high abundance of aquaporins was detected in samples from fruits in the cell expansion stage. We were able quantitatively to reconstruct basic metabolic pathways such as the tricarboxylic acid (TCA) cycle, which indicates sufficient coverage to reconstruct other metabolic pathways. Most of the enzymes that presumably contribute to sugar accumulation in pear fruits could be identified. Our data indicate that invertases do not play a major role in the sugar conversions in developing pear fruits. Rather, sucrose might be broken down by sucrose synthases. Further focusing on sugar transporters, we identified several putative sugar transporters from diverse families which showed developmental regulation. In conclusion, our data set comprehensively describes the proteome of developing pear fruits and provides novel insights about sugar accumulation as well as candidate genes for key reactions and transport steps.
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Affiliation(s)
- Stefan Reuscher
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, 464-8601 Japan
| | - Yoichiro Fukao
- College of Life Sciences, Ritsumeikan University, Kusatsu, 525-8577 Japan
| | - Reina Morimoto
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, 464-8601 Japan
| | - Shungo Otagaki
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, 464-8601 Japan
| | - Akira Oikawa
- Faculty of Agriculture, Yamagata University, Tsuruoka, 997-8555 Japan RIKEN Center for Sustainable Resource Science, Yokohama, 230-0045 Japan
| | - Kanji Isuzugawa
- Yamagata Integrated Agricultural Research Center, Sagae, 999-7601 Japan
| | - Katsuhiro Shiratake
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, 464-8601 Japan
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Han P, Yang C, Liang X, Li L. Identification and characterization of a novel chitinase with antifungal activity from 'Baozhu' pear (Pyrus ussuriensis Maxim.). Food Chem 2015; 196:808-14. [PMID: 26593558 DOI: 10.1016/j.foodchem.2015.10.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Revised: 09/22/2015] [Accepted: 10/01/2015] [Indexed: 11/15/2022]
Abstract
A novel chitinase from the 'Baozhu' pear was found, purified, and characterized in this report. This chitinase was a monomer with a molecular mass of 28.9 kDa. Results of the internal peptide sequence analyses classify this chitinase as a class III chitinase. In the enzymatic hydrolytic assay, this chitinase could hydrolyze chitin derivatives into di-N-acetylchitobiose (GlcNAc2) as a major product in the initial phase, as well as hydrolyze GlcNAc2 into N-acetylglucosamine (GlcNAc), which represents both chitobiosidase and β-N-acetylglucosaminase activity. Biological analyses showed that this chitinase exhibits strong antifungal activity toward agricultural pathogenic fungi. In total, chitinase from 'Baozhu' pear is a novel bifunctional chitinase that could be a potential fungicide in the biological control of plant diseases.
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Affiliation(s)
- Peng Han
- Yunnan Institute of Food Safety, Kunming University of Science and Technology, Kunming, Yunnan 650500, China.
| | - Chengcheng Yang
- Yunnan Institute of Food Safety, Kunming University of Science and Technology, Kunming, Yunnan 650500, China
| | - Xiaobo Liang
- Yunnan Institute of Food Safety, Kunming University of Science and Technology, Kunming, Yunnan 650500, China
| | - Lirong Li
- Yunnan Institute of Food Safety, Kunming University of Science and Technology, Kunming, Yunnan 650500, China
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Wu T, Wang Y, Zheng Y, Fei Z, Dandekar AM, Xu K, Han Z, Cheng L. Suppressing Sorbitol Synthesis Substantially Alters the Global Expression Profile of Stress Response Genes in Apple (Malus domestica) Leaves. PLANT & CELL PHYSIOLOGY 2015; 56:1748-61. [PMID: 26076968 DOI: 10.1093/pcp/pcv092] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Accepted: 06/10/2015] [Indexed: 05/21/2023]
Abstract
Sorbitol is a major product of photosynthesis in apple (Malus domestica) that is involved in carbohydrate metabolism and stress tolerance. However, little is known about how the global transcript levels in apple leaves respond to decreased sorbitol synthesis. In this study we used RNA sequencing (RNA-seq) profiling to characterize the transcriptome of leaves from transgenic lines of the apple cultivar 'Greensleeves' exhibiting suppressed expression of aldose-6-phosphate reductase (A6PR) to gain insights into sorbitol function and the consequences of decreased sorbitol synthesis on gene expression. We observed that, although the leaves of the low sorbitol transgenic lines accumulate higher levels of various primary metabolites, only very limited changes were found in the levels of transcripts associated with primary metabolism. We suggest that this is indicative of post-transcriptional and/or post-translational regulation of primary metabolite accumulation and central carbon metabolism. However, we identified significantly enriched gene ontology terms belonging to the 'stress related process' category in the antisense lines (P-value < 0.05). These include genes involved in the synthesis/degradation of abscisic acid, salicylic acid and jasmonic acid, nucleotide-binding site leucine-rich repeat (NBS-LRR) disease resistance genes and ATP-binding cassette (ABC) transporter genes. This suggests that sorbitol plays a role in the responses of apple trees to abiotic and biotic stresses.
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Affiliation(s)
- Ting Wu
- Institute for Horticultural Plants, China Agricultural University, Beijing 100193, PR China Department of Horticulture, Cornell University, Ithaca, NY 14853, USA
| | - Yi Wang
- Institute for Horticultural Plants, China Agricultural University, Beijing 100193, PR China Department of Horticulture, Cornell University, Ithaca, NY 14853, USA
| | - Yi Zheng
- Boyce Thompson Institute for Plant Research, Cornell University, Ithaca, NY 14853, USA
| | - Zhangjun Fei
- Boyce Thompson Institute for Plant Research, Cornell University, Ithaca, NY 14853, USA
| | - Abhaya M Dandekar
- Department of Plant Science, University of California, Davis, CA 95616, USA
| | - Kenong Xu
- Department of Horticulture, Cornell University, Ithaca, NY 14853, USA
| | - Zhenhai Han
- Institute for Horticultural Plants, China Agricultural University, Beijing 100193, PR China
| | - Lailiang Cheng
- Department of Horticulture, Cornell University, Ithaca, NY 14853, USA
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Dai M, Shi Z, Xu C. Genome-Wide Analysis of Sorbitol Dehydrogenase (SDH) Genes and Their Differential Expression in Two Sand Pear (Pyrus pyrifolia) Fruits. Int J Mol Sci 2015; 16:13065-83. [PMID: 26068235 PMCID: PMC4490486 DOI: 10.3390/ijms160613065] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Revised: 05/28/2015] [Accepted: 06/01/2015] [Indexed: 11/16/2022] Open
Abstract
Through RNA-seq of a mixed fruit sample, fourteen expressed sorbitol dehydrogenase (SDH) genes have been identified from sand pear (Pyrus pyrifolia Nakai). Comparative phylogenetic analysis of these PpySDHs with those from other plants supported the closest relationship of sand pear with Chinese white pear (P. bretschneideri). The expression levels varied greatly among members, and the strongest six (PpySDH2, PpySDH4, PpySDH8, PpySDH12, PpySDH13 and PpySDH14) accounted for 96% of total transcript abundance of PpySDHs. Tissue-specific expression of these six members was observed in nine tissues or organs of sand pear, with the greatest abundance found in functional leaf petioles, followed by the flesh of young fruit. Expression patterns of these six PpySDH genes during fruit development were analyzed in two sand pear cultivars, “Cuiguan” and “Cuiyu”. Overall, expression of PpySDHs peaked twice, first at the fruitlet stage and again at or near harvest. The transcript abundance of PpySDHs was higher in “Cuiguan” than in “Cuiyu”, accompanied by a higher content of sugars and higher ratio of fructose to sorbitol maintained in the former cultivar at harvest. In conclusion, it was suggested that multiple members of the SDH gene family are possibly involved in sand pear fruit development and sugar accumulation and may affect both the sugar amount and sugar composition.
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Affiliation(s)
- Meisong Dai
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Zijingang Campus, Hangzhou 310058, China.
- Institute of Horticulture, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China.
| | - Zebin Shi
- Institute of Horticulture, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China.
| | - Changjie Xu
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Zijingang Campus, Hangzhou 310058, China.
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Jia Y, Wong DCJ, Sweetman C, Bruning JB, Ford CM. New insights into the evolutionary history of plant sorbitol dehydrogenase. BMC PLANT BIOLOGY 2015; 15:101. [PMID: 25879735 PMCID: PMC4404067 DOI: 10.1186/s12870-015-0478-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Accepted: 03/23/2015] [Indexed: 05/08/2023]
Abstract
BACKGROUND Sorbitol dehydrogenase (SDH, EC 1.1.1.14) is the key enzyme involved in sorbitol metabolism in higher plants. SDH genes in some Rosaceae species could be divided into two groups. L-idonate-5-dehydrogenase (LIDH, EC 1.1.1.264) is involved in tartaric acid (TA) synthesis in Vitis vinifera and is highly homologous to plant SDHs. Despite efforts to understand the biological functions of plant SDH, the evolutionary history of plant SDH genes and their phylogenetic relationship with the V. vinifera LIDH gene have not been characterized. RESULTS A total of 92 SDH genes were identified from 42 angiosperm species. SDH genes have been highly duplicated within the Rosaceae family while monocot, Brassicaceae and most Asterid species exhibit singleton SDH genes. Core Eudicot SDHs have diverged into two phylogenetic lineages, now classified as SDH Class I and SDH Class II. V. vinifera LIDH was identified as a Class II SDH. Tandem duplication played a dominant role in the expansion of plant SDH family and Class II SDH genes were positioned in tandem with Class I SDH genes in several plant genomes. Protein modelling analyses of V. vinifera SDHs revealed 19 putative active site residues, three of which exhibited amino acid substitutions between Class I and Class II SDHs and were influenced by positive natural selection in the SDH Class II lineage. Gene expression analyses also demonstrated a clear transcriptional divergence between Class I and Class II SDH genes in V. vinifera and Citrus sinensis (orange). CONCLUSIONS Phylogenetic, natural selection and synteny analyses provided strong support for the emergence of SDH Class II by positive natural selection after tandem duplication in the common ancestor of core Eudicot plants. The substitutions of three putative active site residues might be responsible for the unique enzyme activity of V. vinifera LIDH, which belongs to SDH Class II and represents a novel function of SDH in V. vinifera that may be true also of other Class II SDHs. Gene expression analyses also supported the divergence of SDH Class II at the expression level. This study will facilitate future research into understanding the biological functions of plant SDHs.
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Affiliation(s)
- Yong Jia
- School of Agriculture, Food and Wine, University of Adelaide, Adelaide, 5005, Australia.
| | - Darren C J Wong
- School of Agriculture, Food and Wine, University of Adelaide, Adelaide, 5005, Australia.
- Present address: Wine Research Center, Faculty of Land and Food Systems, University of British Columbia, Vancouver, V6T 1Z4, BC, Canada.
| | - Crystal Sweetman
- School of Agriculture, Food and Wine, University of Adelaide, Adelaide, 5005, Australia.
- Present address: School of Biological Sciences, Flinders University, GPO Box 2100, Adelaide, 5001, Australia.
| | - John B Bruning
- School of Biological Sciences, University of Adelaide, Adelaide, 5005, Australia.
| | - Christopher M Ford
- School of Agriculture, Food and Wine, University of Adelaide, Adelaide, 5005, Australia.
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Aguayo MF, Cáceres JC, Fuentealba M, Muñoz R, Stange C, Cabrera R, Handford M. Polyol specificity of recombinant Arabidopsis thaliana sorbitol dehydrogenase studied by enzyme kinetics and in silico modeling. FRONTIERS IN PLANT SCIENCE 2015; 6:91. [PMID: 25755662 PMCID: PMC4337239 DOI: 10.3389/fpls.2015.00091] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Accepted: 02/03/2015] [Indexed: 05/24/2023]
Abstract
Polyols are enzymatically-produced plant compounds which can act as compatible solutes during periods of abiotic stress. Nicotinamide adenine dinucleotide(+)-dependent SORBITOL DEHYDROGENASE (SDH, E. C. 1.1.1.14) from Arabidopsis thaliana L. sorbitol dehydrogenase (AtSDH) is capable of oxidizing several polyols including sorbitol, ribitol, and xylitol. In the present study, enzymatic assays using recombinant AtSDH demonstrated a higher specificity constant for xylitol compared to sorbitol and ribitol, all of which are C2 (S) and C4 (R) polyols. Enzyme activity was reduced by preincubation with ethylenediaminetetraacetic acid, indicating a requirement for zinc ions. In humans, it has been proposed that sorbitol becomes part of a pentahedric coordination sphere of the catalytic zinc during the reaction mechanism. In order to determine the validity of this pentahedric coordination model in a plant SDH, homology modeling, and Molecular Dynamics simulations of AtSDH ternary complexes with the three polyols were performed using crystal structures of human and Bemisia argentifolii (Genn.) (Hemiptera: Aleyrodidae) SDHs as scaffolds. The results indicate that the differences in interaction with structural water molecules correlate very well with the observed enzymatic parameters, validate the proposed pentahedric coordination of the catalytic zinc ion in a plant SDH, and provide an explanation for why AtSDH shows a preference for polyols with a chirality of C2 (S) and C4 (R).
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Affiliation(s)
| | | | | | | | | | | | - Michael Handford
- Departamento de Biología, Facultad de Ciencias, Universidad de ChileSantiago, Chile
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Hartman MD, Figueroa CM, Piattoni CV, Iglesias AA. Glucitol Dehydrogenase from Peach (Prunus persica) Fruits is Regulated by Thioredoxin h. ACTA ACUST UNITED AC 2014; 55:1157-68. [DOI: 10.1093/pcp/pcu055] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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13
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Suzuki Y, Dandekar AM. Sucrose induces expression of the sorbitol-6-phosphate dehydrogenase gene in source leaves of loquat. PHYSIOLOGIA PLANTARUM 2014; 150:355-362. [PMID: 24102486 DOI: 10.1111/ppl.12106] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2013] [Accepted: 08/27/2013] [Indexed: 06/02/2023]
Abstract
Rosaceae fruit trees use sorbitol and sucrose as translocating sugars and the sorbitol-to-sucrose ratio in source leaves determines apple fruit quality. Here, we investigate the effects of sugars on the expression of genes encoding key photosynthetic enzymes, including sorbitol-6-phosphate dehydrogenase (S6PDH, EC 1.1.1.200), sucrose phosphate synthase (SPS, EC 2.4.1.14), and ADP-glucose pyrophosphorylase (ADPGPPase, EC 2.7.7.27) to understand the sugar-signaling mechanism in Rosaceae fruit trees. Mature leaf-petiole cuttings of loquat (Eriobotrya japonica Lindl. cv. Mogi) were supplied with a water, sorbitol or sucrose solution for 2 days at 20°C. The relative levels of the transcripts were analyzed by real-time polymerase chain reaction (PCR). S6PDH transcription was decreased by sorbitol but drastically increased by sucrose. SPS and ADPGPPase large subunit transcription were decreased by sucrose and sorbitol. The simultaneous application of sorbitol and sucrose revealed that S6PDH transcription increased in a dose-dependent manner with sucrose. These results show that both sorbitol and sucrose work as signaling molecules in source organs of Rosaceae fruit trees. These trees have mechanisms to positively keep sorbitol as the dominant translocating sugar, suggesting that sorbitol plays an important role in their survival strategy. Effects of various sugars on S6PDH expression were investigated. Palatinose, a sucrose analog, increased S6PDH transcription much more drastically than sucrose. Mannose and 3-O-methylglucose, glucose analogs, also increased S6PDH transcription; however, glucose did not. Models of sugar signaling in source organs of Rosaceae fruit trees are discussed.
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Affiliation(s)
- Yasuo Suzuki
- Graduate School of Agricultural Science, Kobe University, Kobe, 657-8501, Japan
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14
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Canesin RCFS, Isique WD, Buzetti S, Souza JAD. Derivation Method for Determining Sorbitol in Fruit Trees. ACTA ACUST UNITED AC 2014. [DOI: 10.4236/ajps.2014.523361] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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15
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Aguayo MF, Ampuero D, Mandujano P, Parada R, Muñoz R, Gallart M, Altabella T, Cabrera R, Stange C, Handford M. Sorbitol dehydrogenase is a cytosolic protein required for sorbitol metabolism in Arabidopsis thaliana. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2013; 205-206:63-75. [PMID: 23498864 DOI: 10.1016/j.plantsci.2013.01.012] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2012] [Revised: 01/11/2013] [Accepted: 01/15/2013] [Indexed: 05/08/2023]
Abstract
Sorbitol is converted to fructose in Rosaceae species by SORBITOL DEHYDROGENASE (SDH, EC 1.1.1.14), especially in sink organs. SDH has also been found in non-Rosaceae species and here we show that the protein encoded by At5g51970 in Arabidopsis thaliana (L.) Heynh. possesses the molecular characteristics of an SDH. Using a green fluorescent protein-tagged version and anti-SDH antisera, we determined that SDH is cytosolically localized, consistent with bioinformatic predictions. We also show that SDH is widely expressed, and that SDH protein accumulates in both source and sink organs. In the presence of NAD+, recombinant SDH exhibited greatest oxidative activity with sorbitol, ribitol and xylitol as substrates; other sugar alcohols were oxidized to a lesser extent. Under standard growth conditions, three independent sdh- mutants developed as wild-type. Nevertheless, all three exhibited reduced dry weight and primary root length compared to wild-type when grown in the presence of sorbitol. Additionally, under short-day conditions, the mutants were more resistant to dehydration stress, as shown by a reduced loss of leaf water content when watering was withheld, and a greater survival rate on re-watering. This evidence suggests that limitations in the metabolism of sugar alcohols alter the growth of Arabidopsis and its response to drought.
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16
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Abstract
Stress is an important factor for many diseases in living metabolisms. The mini pathway named as polyol is a critical junction for stress factors. This pathway has two enzymes: aldose reductase (AR) and sorbitol dehydrogenase (SDH). It is linked with some diseases such as diabetes mellitus and some cancer types. In particular, SDH is very sensitive and unstable in in vitro conditions. In this study, SDH was purified by using simple and rapid chromatographic methods such as DEAE-Sephadex and CM-Sephadex C-50 columns. Subunit and active form molecular weights were found as 39.8 kDa and 150 kDa, respectively. The in vitro effects of some antineoplastic drugs were investigated. IC(50) values were 0.025, 0.081, 0.291, 1.62, 4.86, 6.54 mM for dacarbazine, methotrexate, epirubicin hydrochloride, calcium folinate, gemcitabine hydrochloride, oxaliplatin, respectively. From these results, dacarbazine was lowest IC(50) value and it is the strongest inhibitor for liver SDH enzyme activity compared to the other drugs.
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Affiliation(s)
- Zuhal Alim
- Atatürk University, Faculty of Sciences, Department of Chemistry, Biochemistry Division, 25240, Turkey-Erzurum
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17
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Guo ZX, Pan TF, Li KT, Zhong FL, Lin L, Pan DM, Lu LX. Cloning of NAD-SDH cDNA from plum fruit and its expression and characterization. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2012; 57:175-180. [PMID: 22721947 DOI: 10.1016/j.plaphy.2012.05.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2012] [Accepted: 05/21/2012] [Indexed: 06/01/2023]
Abstract
A full-length cDNA consisting of 1444 bp for NAD dependent sorbitol dehydrogenase (NAD-SDH) was cloned from fruit of plum (Prunus salicina var. cordata cv. Younai) by means of RT-PCR and RACE. The cDNA containing an open reading frame (ORF) of 1101 bp encoded a polypeptide of 367 amino acid residues. The maltose binding protein fusion SDH (MBP-SDH) was expressed and partially purified from Escherichia coli cells, and biochemical properties of MBP-SDH and SDH cleaved from the fusion protein by factor Xa were characterized. The MBP-SDH had the specific affinity for NAD and was able to oxidize sorbitol, xylitol, l-ribitol and mannitol but not ethyl alcohol, arabitol and other polyols. The optimum pH for the oxidation of sorbitol and the reduction of fructose was 9.0 and 7.0, respectively; the maximum reaction rate occurred when temperature increased up to 50 °C in the presence of sorbitol. The MBP-SDH with a subunit of 80 kDa appears to be a hexamer. Its molecular weight was 478.6 kDa estimated by gel filtration and 493.2 kDa estimated using native linear gradient PAGE. The K(m) values for sorbitol, NAD, fructose and NADH were 95.86 mM, 0.31 mM, 1.04 M and 0.038 mM, respectively. However, when MBP was cleaved from the fusion enzyme, the SDH exists as a homotetramer with the native molecular weight of 164.8 kDa estimated by gel filtration. The K(m) values were 111.8 mM, 0.35 mM, 1.25 M and 0.048 mM for sorbitol, NAD, fructose and NADH, respectively. The MBP-SDH and the SDH were similar with respect to their kinetic characteristics despite their difference in quaternary structures.
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Affiliation(s)
- Zhi-Xiong Guo
- Institute of Postharvest Science and Technology of Horticultural Products, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian Province, PR China.
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18
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Nosarzewski M, Downie AB, Wu B, Archbold DD. The role of SORBITOL DEHYDROGENASE in Arabidopsis thaliana. FUNCTIONAL PLANT BIOLOGY : FPB 2012; 39:462-470. [PMID: 32480797 DOI: 10.1071/fp12008] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2012] [Accepted: 04/04/2012] [Indexed: 06/11/2023]
Abstract
SORBITOL DEHYDROGENASE (SDH, EC 1.1.1.14) catalyses the interconversion of polyols and ketoses (e.g. sorbitol ⟷ fructose). Using two independent Arabidopsis thaliana (L.) Heynh. sdh knockout mutants, we show that SDH (At5g51970) plays a primary role in sorbitol metabolism as well as an unexpected role in ribitol metabolism. Sorbitol content increased in both wild-type (WT) and mutant plant leaves during drought stress, but mutants showed a dramatically different phenotype, dying even if rewatered. The lack of functional SDH in mutant plants was accompanied by accumulation of foliar sorbitol and at least 10-fold more ribitol, neither of which decreased in mutant plants after rewatering. In addition, mutant plants were uniquely sensitive to ribitol in a concentration-dependent manner, which either prevented them from completing seed germination or inhibited seedling development, effects not observed with other polyols or with ribitol-treated WT plants. Ribitol catabolism may occur solely through SDH in A. thaliana, though at only 30% the rate of that for sorbitol. The results indicate a role for SDH in metabolism of sorbitol to fructose and in ribitol conversion to ribulose in A. thaliana during recovery from drought stress.
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Affiliation(s)
- Marta Nosarzewski
- University of Kentucky, Department of Horticulture, N318 Agricultural Science Center North, Lexington, KY 40546, USA
| | - A Bruce Downie
- University of Kentucky, Department of Horticulture, N318 Agricultural Science Center North, Lexington, KY 40546, USA
| | - Benhong Wu
- University of Kentucky, Department of Horticulture, N318 Agricultural Science Center North, Lexington, KY 40546, USA
| | - Douglas D Archbold
- University of Kentucky, Department of Horticulture, N318 Agricultural Science Center North, Lexington, KY 40546, USA
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19
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Yamaki S. Metabolism and Accumulation of Sugars Translocated to Fruit and Their Regulation. ACTA ACUST UNITED AC 2010. [DOI: 10.2503/jjshs1.79.1] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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21
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Sutsawat D, Yamada K, Shiratake K, Kanayama Y, Yamaki S. Properties of Sorbitol Dehydrogenase in Strawberry Fruit and Enhancement of the Activity by Fructose and Auxin. ACTA ACUST UNITED AC 2008. [DOI: 10.2503/jjshs1.77.318] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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22
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Deguchi M, Bennett AB, Yamaki S, Yamada K, Kanahama K, Kanayama Y. An engineered sorbitol cycle alters sugar composition, not growth, in transformed tobacco. PLANT, CELL & ENVIRONMENT 2006; 29:1980-8. [PMID: 16930323 DOI: 10.1111/j.1365-3040.2006.01573.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Many efforts have been made to engineer stress tolerance by accumulating polyols. Transformants that accumulate polyols often show growth inhibition, because polyols are synthesized as a dead-end product in plants that do not naturally accumulate polyols. Here, we show a novel strategy in which a sorbitol cycle was engineered by introducing apple cDNA encoding NAD-dependent sorbitol dehydrogenase (SDH) in addition to sorbitol-6-phosphate dehydrogenase (S6PDH). Tobacco plants transformed only with S6PDH showed growth inhibition, and very few transformants were obtained. In contrast, many transgenic plants with both S6PDH and SDH were easily obtained, and their growth was normal despite their accumulation of sorbitol. Interestingly, the engineered sorbitol cycle enhanced the accumulation of sucrose instead of fructose that was expected to be increased. Sucrose, rather than fructose, was also increased in the immature fruit of tomato plants transformed with an antisense fructokinase gene in which the phosphorylation of fructose was inhibited. A common phenomenon was observed in the metabolic engineering of two different pathways, showing the presence of homeostatic regulation of fructose levels.
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Affiliation(s)
- Michihito Deguchi
- Graduate School of Agricultural Science, Tohoku University, Sendai 981-8555, Japan
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23
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Suzue Y, Tsukuda M, Hatano S, Kanayama Y, Yamada K, Shiratake K, Yamaki S. Changes in the Activity and Gene Expression of Sorbitol- and Sucrose-related Enzymes with Leaf Development of 'La France' Pear. ACTA ACUST UNITED AC 2006. [DOI: 10.2503/jjshs.75.45] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Ohta K, Moriguchi R, Kanahama K, Yamaki S, Kanayama Y. Molecular evidence of sorbitol dehydrogenase in tomato, a non-Rosaceae plant. PHYTOCHEMISTRY 2005; 66:2822-8. [PMID: 16289145 DOI: 10.1016/j.phytochem.2005.09.033] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2005] [Revised: 09/25/2005] [Accepted: 09/28/2005] [Indexed: 05/05/2023]
Abstract
The enzyme NAD-dependent sorbitol dehydrogenase (SDH) is well characterized in the Rosaceae family of fruit trees, which synthesizes sorbitol as a translocatable photosynthate. Expressed sequence tags of SDH-like sequences have also been generated from various non-Rosaceae species that do not synthesize sorbitol as a primary photosynthetic product, but the physiological roles of the encoded proteins in non-Rosaceae plants are unknown. Therefore, we isolated an SDH-like cDNA (SDL) from tomato (Lycopersicon esculentum Mill.). Genomic Southern blot analysis suggested that SDL exists in the tomato genome as a single-copy gene. Northern blot analysis showed that SDL is ubiquitously expressed in tomato plants. Recombinant SDL protein was produced and purified for enzymatic characterization. SDL catalyzed the interconversion of sorbitol and fructose with NAD (H). SDL showed highest activity for sorbitol among the several substrates tested. SDL showed no activity with NADP+. Thus, SDL was identified as a SDH, although the Km values and substrate specificity of SDL were significantly different from those of SDH purified from the Japanese pear (Pyrus pyrifolia), a Rosaceae fruit tree. In addition, tomato was transformed with antisense SDL to evaluate the contribution of SDL to SDH activity in tomato. The transformation decreased SDH activity to approximately 50% on average. Taken together, these results provide molecular evidence of SDH in tomato, and SDL was renamed LeSDH.
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Affiliation(s)
- Kazuhiro Ohta
- Graduate School of Agricultural Science, Tohoku University, Sendai 981-8555, Japan
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25
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Karacaoğlan V, Ozer I. Steady-state kinetic properties of sorbitol dehydrogenase from chicken liver. Comp Biochem Physiol B Biochem Mol Biol 2005; 140:309-12. [PMID: 15649778 DOI: 10.1016/j.cbpc.2004.10.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2004] [Revised: 10/25/2004] [Accepted: 10/26/2004] [Indexed: 10/26/2022]
Abstract
The steady-state kinetic properties of partially purified chicken liver sorbitol dehydrogenase (SDH) were determined spectrophotometrically at 25 degrees C, in 50 mM 3-(N-morpholino)propanesulfonic acid (MOPS) buffer, pH 8.0. In the sorbitol-to-fructose direction, analysis was based on initial rate data obtained at [NAD(+)](o)=0.1-0.4 mM and [sorbitol](o)=1.25-10 mM. The reverse process was analyzed by recording progress curves for NADH consumption, starting with [NADH](o)=0.2 mM and [fructose](o)=66.7-267 mM. The kinetics conformed to an ordered sequential model, with the cofactors adding first. The steady-state parameters in the forward direction, K(NAD(+)), K(iNAD(+)) and K(sorbitol), were found to be 210+/-62 muM, 220+/-69 microM and 3.2+/-0.54 mM, respectively. The corresponding parameters in the reverse direction were K(NADH)=240+/-58 microM, K(iNADH)=10+/-2.8 microM and K(fructose)=1000+/-140 mM. The results indicated a close parallelism with human SDH, yet up to 40-fold differences were observed when compared to related reports on other mammalian species. The structural and adaptive bases of the variation in substrate and cofactor affinities need to be accounted for.
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Affiliation(s)
- Volkan Karacaoğlan
- Department of Biochemistry, School of Pharmacy, Hacettepe University, 06100 Ankara, Turkey
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Lin SK, Chang MC, Tsai YG, Lur HS. Proteomic analysis of the expression of proteins related to rice quality during caryopsis development and the effect of high temperature on expression. Proteomics 2005; 5:2140-56. [PMID: 15852341 DOI: 10.1002/pmic.200401105] [Citation(s) in RCA: 126] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Proteins are essential to rice caryopsis development and quality formation. High temperature is an important environmental factor, which may decrease grain quality. In the present study rice caryopsis proteins were profiled by two-dimensional polyacrylamide gel electrophoresis, and differentially expressed proteins were analyzed by liquid chromatography/tandem mass spectrometry. Expressions of more than 400 polypeptide spots during caryopsis development, in response to temperature treatments or between varieties were monitored. Among them, more than 70 differentially expressed polypeptides were analyzed by liquid chromatography/tandem mass spectrometry. We identified 54 proteins with known functions. Of these, 21 were involved with carbohydrate metabolism, 14 with protein synthesis and sorting, and 9 with stress responses. Waxy (Wx) proteins and glutelins were the most significant spots, which increased significantly during development. Allergen-like proteins, PPDK and NADH-SDH, also were expressed during development, implying their physiological roles in caryopsis. Expression of large isoforms of Wx proteins was correlated with the amylose content of rice caryopses. One protein with high GC content in its DNA sequence was correlated with the chalky trait of kernels. High temperature (35/30 degrees C) decreased the expression of Wx proteins, allergen-like proteins, and elongation factor 1beta, but increased the expression of small heat shock proteins (sHSP), glyceraldehyde-3-phosphate dehydrogenase, and prolamin. sHSP was positively correlated with the appearance of chalky kernels. During development, glutelins were phosphorylated and glycosylated, indicating that these molecules were post-translationally modified. Possible functions of the expression of candidate proteins on the grain quality are discussed.
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Affiliation(s)
- Shao-Kai Lin
- Department of Agronomy, National Taiwan University, Taipei, Republic of China
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Kanayama Y, Kogawa M, Yamaguchi M, Kanahama K. Fructose Content and the Activity of Fructose-related Enzymes in the Fruit of Eating-quality Peach Cultivars and Native-type Peach Cultivars. ACTA ACUST UNITED AC 2005. [DOI: 10.2503/jjshs.74.431] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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28
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Riveros-Rosas H, Julián-Sánchez A, Villalobos-Molina R, Pardo JP, Piña E. Diversity, taxonomy and evolution of medium-chain dehydrogenase/reductase superfamily. EUROPEAN JOURNAL OF BIOCHEMISTRY 2003; 270:3309-34. [PMID: 12899689 DOI: 10.1046/j.1432-1033.2003.03704.x] [Citation(s) in RCA: 85] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
A comprehensive, structural and functional, in silico analysis of the medium-chain dehydrogenase/reductase (MDR) superfamily, including 583 proteins, was carried out by use of extensive database mining and the blastp program in an iterative manner to identify all known members of the superfamily. Based on phylogenetic, sequence, and functional similarities, the protein members of the MDR superfamily were classified into three different taxonomic categories: (a) subfamilies, consisting of a closed group containing a set of ideally orthologous proteins that perform the same function; (b) families, each comprising a cluster of monophyletic subfamilies that possess significant sequence identity among them and might share or not common substrates or mechanisms of reaction; and (c) macrofamilies, each comprising a cluster of monophyletic protein families with protein members from the three domains of life, which includes at least one subfamily member that displays activity related to a very ancient metabolic pathway. In this context, a superfamily is a group of homologous protein families (and/or macrofamilies) with monophyletic origin that shares at least a barely detectable sequence similarity, but showing the same 3D fold. The MDR superfamily encloses three macrofamilies, with eight families and 49 subfamilies. These subfamilies exhibit great functional diversity including noncatalytic members with different subcellular, phylogenetic, and species distributions. This results from constant enzymogenesis and proteinogenesis within each kingdom, and highlights the huge plasticity that MDR superfamily members possess. Thus, through evolution a great number of taxa-specific new functions were acquired by MDRs. The generation of new functions fulfilled by proteins, can be considered as the essence of protein evolution. The mechanisms of protein evolution inside MDR are not constrained to conserve substrate specificity and/or chemistry of catalysis. In consequence, MDR functional diversity is more complex than sequence diversity. MDR is a very ancient protein superfamily that existed in the last universal common ancestor. It had at least two (and probably three) different ancestral activities related to formaldehyde metabolism and alcoholic fermentation. Eukaryotic members of this superfamily are more related to bacterial than to archaeal members; horizontal gene transfer among the domains of life appears to be a rare event in modern organisms.
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Affiliation(s)
- Héctor Riveros-Rosas
- Depto. Bioquímica, Fac. Medicina, UNAM, Cd. Universitaria, México D.F., México; Depto. Farmacobiología, CINVESTAV-Sede Sur, México D.F., México
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