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Qin D, Liu G, Liu R, Wang C, Xu F, Xu Q, Ling Y, Dong G, Peng Y, Ge S, Guo G, Dong J, Li C. Positional cloning identified HvTUBULIN8 as the candidate gene for round lateral spikelet (RLS) in barley (Hordeum vulgare L.). TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2023; 136:7. [PMID: 36656367 PMCID: PMC9852219 DOI: 10.1007/s00122-023-04272-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Accepted: 11/10/2022] [Indexed: 06/17/2023]
Abstract
Map-based cloning, subcellular localization, virus-induced-gene-silencing and transcriptomic analysis reveal HvTUB8 as a candidate gene with pleiotropic effects on barley spike and leaf development via ethylene and chlorophyll metabolism. Barley lateral spikelet morphology and grain shape play key roles in grain physical quality and yield. Several genes and QTLs for these traits have been cloned or fine mapped previously. Here, we report the phenotypic and genotypic analysis of a barley mutant with round lateral spikelet (rls) from cv. Edamai 934. rls had round lateral spikelet, short but round grain, shortened awn, thick glume and dark green leaves. Histocytologic and ultrastructural analysis revealed that the difference of grain shape of rls was caused by change of cell arrangement in glume, and the dark leaf color resulted from enlarged chloroplast. HvTUBULIN8 (HvTUB8) was identified as the candidate gene for rls by combination of RNA-Seq, map-based-cloning, virus-induced-gene-silencing (VIGS) and protein subcellular location. A single G-A substitution at the third exon of HvTUB8 resulted in change of Cysteine 354 to tyrosine. Furthermore, the mutant isoform Hvtub8 could be detected in both nucleus and cytoplasm, whereas the wild-type protein was only in cytoplasm and granular organelles of wheat protoplasts. Being consistent with the rare phenotype, the "A" allele of HvTUB8 was only detected in rls, but not in a worldwide barley germplasm panel with 400 accessions. VIGS confirmed that HvTUB8 was essential to maintain spike integrity. RNA-Seq results suggested that HvTUB8 may control spike morphogenesis via ethylene homeostasis and signaling, and control leaf color through chlorophyll metabolism. Collectively, our results support HvTUB8 as a candidate gene for barley spike and leaf morphology and provide insight of a novel mechanism of it in barley development.
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Affiliation(s)
- Dandan Qin
- Institute of Food Crops, Hubei Academy of Agricultural Sciences, Wuhan, 430064, Hubei, China
- Key Laboratory for Crop Molecular, Breeding of Ministry of Agriculture and Rural Affairs, Wuhan, 430064, Hubei, China
| | - Gang Liu
- Institute of Food Crops, Hubei Academy of Agricultural Sciences, Wuhan, 430064, Hubei, China
- Key Laboratory for Crop Molecular, Breeding of Ministry of Agriculture and Rural Affairs, Wuhan, 430064, Hubei, China
| | - Rui Liu
- Wuhan Polytechnic University, Wuhan, 430023, Hubei, China
| | - Chunchao Wang
- Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Fuchao Xu
- Institute of Food Crops, Hubei Academy of Agricultural Sciences, Wuhan, 430064, Hubei, China
- Key Laboratory for Crop Molecular, Breeding of Ministry of Agriculture and Rural Affairs, Wuhan, 430064, Hubei, China
| | - Qing Xu
- Institute of Food Crops, Hubei Academy of Agricultural Sciences, Wuhan, 430064, Hubei, China
- Key Laboratory for Crop Molecular, Breeding of Ministry of Agriculture and Rural Affairs, Wuhan, 430064, Hubei, China
| | - Yu Ling
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, 524088, Guangdong, China
| | - Guoqing Dong
- Wuhan Polytechnic University, Wuhan, 430023, Hubei, China
| | - Yanchun Peng
- Institute of Food Crops, Hubei Academy of Agricultural Sciences, Wuhan, 430064, Hubei, China
- Key Laboratory for Crop Molecular, Breeding of Ministry of Agriculture and Rural Affairs, Wuhan, 430064, Hubei, China
| | - Shuangtao Ge
- Institute of Food Crops, Hubei Academy of Agricultural Sciences, Wuhan, 430064, Hubei, China
- Key Laboratory for Crop Molecular, Breeding of Ministry of Agriculture and Rural Affairs, Wuhan, 430064, Hubei, China
| | - Ganggang Guo
- Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Jing Dong
- Institute of Food Crops, Hubei Academy of Agricultural Sciences, Wuhan, 430064, Hubei, China
- Key Laboratory for Crop Molecular, Breeding of Ministry of Agriculture and Rural Affairs, Wuhan, 430064, Hubei, China
| | - Chengdao Li
- Western Crop Genetics Alliance, College of Science, Health, Engineering and Education, Murdoch University, Western Australia, WA, 6150, Australia.
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Zou W, Wan Z, Yu X, Liu Z, Yuan P, Zhang X. Sulfur vacancies affect the environmental fate, corona formation, and microalgae toxicity of molybdenum disulfide nanoflakes. JOURNAL OF HAZARDOUS MATERIALS 2021; 419:126499. [PMID: 34214853 DOI: 10.1016/j.jhazmat.2021.126499] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 06/09/2021] [Accepted: 06/23/2021] [Indexed: 06/13/2023]
Abstract
Sulfur vacancy (SV) defects have been engineered in two-dimensional (2D) transition metal dichalcogenides (TMDs) for high performance applications in various fields involving environmental protection. Understanding the influence of SVs on the environmental fate and toxicity of TMDs is critical for evaluating their risk. Our work discovered that SVs (with S/Mo ratios of 1.65 and 1.32) reduced the dispersibility and promoted aggregation of 2H phase molybdenum disulfide (2H-MoS2, a hot TMD) in aqueous solution. The generation capability of •O2- and •OH was increased and the dissolution of 2H-MoS2 was significantly accelerated after SVs formation. Different with pristine form, S-vacant 2H-MoS2 preferentially harvested proteins (i.e., forming protein corona) involved in antioxidation, photosynthetic electron transport, and the cytoskeleton structure of microalgae. These proteins contain a higher relative number of thiol groups, which exhibited stronger affinity to S-vacant than pristine 2H-MoS2, as elucidated by density functional theory calculations. Notably, SVs aggravated algal growth inhibition, oxidative damage, photosynthetic efficiency and cell membrane permeability reduction induced by 2H-MoS2 due to increased free radical yield and the specific binding of functional proteins. Our findings provide insights into the roles of SVs on the risk of MoS2 while highlighting the importance of rational design for TMDs application.
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Affiliation(s)
- Wei Zou
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, International Joint Laboratory on Key Techniques in Water Treatment, Henan Normal University, Xinxiang 453007, China.
| | - Zepeng Wan
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, International Joint Laboratory on Key Techniques in Water Treatment, Henan Normal University, Xinxiang 453007, China
| | - Xiaoyu Yu
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, International Joint Laboratory on Key Techniques in Water Treatment, Henan Normal University, Xinxiang 453007, China
| | - Zhenzhen Liu
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, International Joint Laboratory on Key Techniques in Water Treatment, Henan Normal University, Xinxiang 453007, China
| | - Peng Yuan
- Henan International Collaborative Laboratory for Health Effects and Intervention of Air Pollution, School of Public Health, Xinxiang Medical University, Xinxiang 453003, China
| | - Xingli Zhang
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, International Joint Laboratory on Key Techniques in Water Treatment, Henan Normal University, Xinxiang 453007, China
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Liu C, Yao J, Yin J, Xue J, Zhang H. Recombinant α- and β-tubulin from Echinococcus granulosus: expression, purification and polymerization. ACTA ACUST UNITED AC 2018; 25:62. [PMID: 30516131 PMCID: PMC6280675 DOI: 10.1051/parasite/2018063] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Accepted: 11/19/2018] [Indexed: 12/29/2022]
Abstract
Echinococcosis, which causes a high disease burden and is of great public health significance, is caused by the larval stage of Echinococcus species. It has been suggested that tubulin is the target of benzimidazoles, the only drugs for the treatment of echinococcosis. This study evaluated the characteristics of tubulins from Echinococcus granulosus. The full-length cDNAs of E. granulosus α- and β-tubulin isoforms were cloned by reverse transcription PCR from protoscolex RNA. Then, these two tubulin isoforms (α9 and β4) were recombinantly expressed as insoluble inclusion bodies in Escherichia coli. Nickel affinity chromatography was used to purify and refold the contents of these inclusion bodies as active proteins. The polymerization of tubulins was monitored by UV spectrophotometry (A350) and confirmed by confocal microscopy and transmission electron microscopy (TEM). Nucleotide sequence analysis revealed that E. granulosus 1356 bp α9-tubulin and 1332 bp β4-tubulin encode corresponding proteins of 451 and 443 amino acids. The average yields of α9- and β4-tubulin were 2.0–3.0 mg/L and 3.5–5.0 mg/L of culture, respectively. Moreover, recombinant α9- and β4-tubulin were capable of polymerizing into microtubule-like structures under appropriate conditions in vitro. These recombinant tubulins could be helpful for screening anti-Echinococcus compounds targeting the tubulins of E. granulosus.
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Affiliation(s)
- Congshan Liu
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Key Laboratory of Parasite and Vector Biology, MOH, National Center for International Research on Tropical Diseases, WHO Collaborating Centre for Tropical Diseases, Shanghai 200025, People's Republic of China
| | - Jiaqing Yao
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Key Laboratory of Parasite and Vector Biology, MOH, National Center for International Research on Tropical Diseases, WHO Collaborating Centre for Tropical Diseases, Shanghai 200025, People's Republic of China
| | - Jianhai Yin
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Key Laboratory of Parasite and Vector Biology, MOH, National Center for International Research on Tropical Diseases, WHO Collaborating Centre for Tropical Diseases, Shanghai 200025, People's Republic of China
| | - Jian Xue
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Key Laboratory of Parasite and Vector Biology, MOH, National Center for International Research on Tropical Diseases, WHO Collaborating Centre for Tropical Diseases, Shanghai 200025, People's Republic of China
| | - Haobing Zhang
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Key Laboratory of Parasite and Vector Biology, MOH, National Center for International Research on Tropical Diseases, WHO Collaborating Centre for Tropical Diseases, Shanghai 200025, People's Republic of China
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Minoura I. Towards an understanding of the isotype-specific functions of tubulin in neurons: Technical advances in tubulin expression and purification. Neurosci Res 2017; 122:1-8. [PMID: 28412269 DOI: 10.1016/j.neures.2017.04.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Revised: 03/29/2017] [Accepted: 04/07/2017] [Indexed: 12/20/2022]
Abstract
Microtubules are cytoskeletal filaments critical for determining the complex morphology of neurons, as well as the basic architecture and organization of mitosis in all eukaryotic cells. Microtubules in humans are composed of 8 α- and 9 β-tubulin isotypes, each of which is encoded by different members of a multi-gene family. The expression pattern of tubulin isotypes, in addition to isotype-specific post-translational modifications, is thought to be critical for the morphogenesis of axons and dendrites. Recent studies revealed that several neurodevelopmental disorders are caused by mutations of specific tubulin isotypes, suggesting that each tubulin isotype has distinct functions. Therefore, in vitro and in vivo functional analyses of tubulin isotypes are important to understand the pathogenesis of developmental disorders. Likewise, analysis of developmental disorders may clarify the function of different tubulin isotypes. In this respect, both the preparation of specific tubulin isotypes and of specific mutant tubulin proteins is critical to understanding the function of tubulin. In the last 20 years, various methods have been developed to study functional differences between tubulin isotypes and the functional defects caused by tubulin mutations. These technical achievements have been discussed in this review. The function of tubulin/microtubules in neuronal morphogenesis as revealed through these techniques has also been described.
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Affiliation(s)
- Itsushi Minoura
- Laboratory for Molecular Biophysics, Brain Science Institute, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan; Goryo Chemical Inc., Earee Bldg. 5F, Kita 8 Nishi 18-35-100, Chuo-ku, Sapporo 060-0008, Japan.
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Zhou Y, Xu J, Zhu Y, Duan Y, Zhou M. Mechanism of Action of the Benzimidazole Fungicide on Fusarium graminearum: Interfering with Polymerization of Monomeric Tubulin But Not Polymerized Microtubule. PHYTOPATHOLOGY 2016; 106:807-813. [PMID: 26976730 DOI: 10.1094/phyto-08-15-0186-r] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Tubulins are the proposed target of clinically relevant anticancer drugs, anthelmintic, and fungicide. β2-tubulin of the plant pathogen Fusarium graminearum was considered as the target of benzimidazole compounds by homology modeling in our previous work. In this study, α1-, α2-, and β2-tubulin of F. graminearum were produced in Escherichia coli. Three benzimidazole compounds (carbendazim, benomyl, and thiabendazole) interacted with the recombinant β2-tubulin and reduced the maximum fluorescence intensity of 2 μM β2-tubulin 47, 50, and 25%, respectively, at saturation of compound-tubulin complexes. Furthermore, carbendazim significantly inhibited the polymerization of α1-/β2-tubulins and α2-/β2-tubulins 90.9 ± 0.4 and 93.5 ± 0.05%, respectively, in vitro. A similar result appeared with benomyl on the polymerization of α1-/β2-tubulins and α2-/β2-tubulins at 89.9 ± 0.1% and 92.6 ± 1.2% inhibition ratios, respectively. In addition, thiabendazole inhibited 81.6 ± 1% polymerization of α1-/β2-tubulins, whereas it had less effect on α2-/β2-tubulin polymerization, with 20.1 ± 1.9% inhibition ratio. However, the three compounds cannot destabilize the polymerized microtubule. To illuminate the issue, mapping the carbendazim binding sites and β/α subunit interface on β/α-tubulin complexes by homology modeling showed that the two domains were closed to each other. Understanding the nature of the interaction between benzimidazole compounds and F. graminearum tubulin is fundamental for the development of tubulin-specific anti-F. graminearum compounds.
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Affiliation(s)
- Yujun Zhou
- All authors: College of Plant Protection, Nanjing Agricultural University, Key Laboratory of Monitoring and Management of Crop Diseases and Pest Insects, Ministry of Agriculture, Nanjing, China; and second author: College of Forestry, Henan University of Science and Technology, Tianjing Rd No 70, 471003, Luoyang, People's Republic of China
| | - Jianqiang Xu
- All authors: College of Plant Protection, Nanjing Agricultural University, Key Laboratory of Monitoring and Management of Crop Diseases and Pest Insects, Ministry of Agriculture, Nanjing, China; and second author: College of Forestry, Henan University of Science and Technology, Tianjing Rd No 70, 471003, Luoyang, People's Republic of China
| | - Yuanye Zhu
- All authors: College of Plant Protection, Nanjing Agricultural University, Key Laboratory of Monitoring and Management of Crop Diseases and Pest Insects, Ministry of Agriculture, Nanjing, China; and second author: College of Forestry, Henan University of Science and Technology, Tianjing Rd No 70, 471003, Luoyang, People's Republic of China
| | - Yabing Duan
- All authors: College of Plant Protection, Nanjing Agricultural University, Key Laboratory of Monitoring and Management of Crop Diseases and Pest Insects, Ministry of Agriculture, Nanjing, China; and second author: College of Forestry, Henan University of Science and Technology, Tianjing Rd No 70, 471003, Luoyang, People's Republic of China
| | - Mingguo Zhou
- All authors: College of Plant Protection, Nanjing Agricultural University, Key Laboratory of Monitoring and Management of Crop Diseases and Pest Insects, Ministry of Agriculture, Nanjing, China; and second author: College of Forestry, Henan University of Science and Technology, Tianjing Rd No 70, 471003, Luoyang, People's Republic of China
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Kudo Y, Abe A, Ito K, Cho Y, Yotsu-Yamashita M, Konoki K. Expression of recombinant alpha and beta tubulins from the yew Taxus cuspidata and analysis of the microtubule assembly in the presence of taxol. Biosci Biotechnol Biochem 2014; 78:1887-94. [PMID: 25070196 DOI: 10.1080/09168451.2014.940837] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Taxol was originally isolated from the yew Taxus brevifolia. Because taxol inhibits the depolymerization of microtubules, the presence of a self-resistance mechanism in Taxus spp. was hypothesized. The cloning of the cDNA for alpha and beta tubulins from Taxus cuspidata and those from the human embryonic kidney cell line HEK293T revealed that the (26)Asp, (359)Arg, and (361)Leu residues in the human beta tubulin, which are important for taxol binding, were replaced with Glu, Trp, and Met in the beta tubulin of T. cuspidata, respectively. The microtubule assembly of the recombinant alpha and beta tubulins was monitored turbidimetrically, and the results clearly demonstrated that the microtubule from T. cuspidata is less sensitive to taxol than that from HEK293T cells. The Taxus microtubule composed of the wild-type alpha tubulin and the beta tubulin with the E26D mutation restored the sensitivity to taxol. We thus postulated that the mutation identified in the beta tubulin of T. cuspidata plays a role in the self-resistance of this species against taxol.
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Affiliation(s)
- Yuma Kudo
- a Graduate School of Agricultural Science , Tohoku University , Sendai , Japan
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Dempsey E, Prudêncio M, Fennell BJ, Gomes-Santos CS, Barlow JW, Bell A. Antimitotic herbicides bind to an unidentified site on malarial parasite tubulin and block development of liver-stage Plasmodium parasites. Mol Biochem Parasitol 2013; 188:116-27. [PMID: 23523992 DOI: 10.1016/j.molbiopara.2013.03.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2012] [Revised: 03/07/2013] [Accepted: 03/14/2013] [Indexed: 02/04/2023]
Abstract
Malarial parasites are exquisitely susceptible to a number of microtubule inhibitors but most of these compounds also affect human microtubules. Herbicides of the dinitroaniline and phosphorothioamidate classes however affect some plant and protozoal cells but not mammalian ones. We have previously shown that these herbicides block schizogony in erythrocytic parasites of the most lethal human malaria, Plasmodium falciparum, disrupt their mitotic spindles, and bind selectively to parasite tubulin. Here we show for the first time that the antimitotic herbicides also block the development of malarial parasites in the liver stage. Structure-based design of novel antimalarial agents binding to tubulin at the herbicide site, which presumably exists on (some) parasite and plant tubulins but not mammalian ones, can therefore constitute an important transmission blocking approach. The nature of this binding site is controversial, with three overlapping but non-identical locations on α-tubulin proposed in the literature. We tested the validity of the three sites by (i) using site-directed mutagenesis to introduce six amino acid changes designed to occlude them, (ii) producing the resulting tubulins recombinantly in Escherichia coli and (iii) measuring the affinity of the herbicides amiprophosmethyl and oryzalin for these proteins in comparison with wild-type tubulins by fluorescence quenching. The changes had little or no effect, with dissociation constants (Kd) no more than 1.3-fold (amiprophosmethyl) or 1.6-fold (oryzalin) higher than wild-type. We conclude that the herbicides impair Plasmodium liver stage as well as blood stage development but that the location of their binding site on malarial parasite tubulin remains to be proven.
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Affiliation(s)
- Enda Dempsey
- Department of Microbiology, School of Genetics & Microbiology, Moyne Institute of Preventive Medicine, Trinity College Dublin, Dublin 2, Ireland
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Expression profile analysis of genes involved in horizontal gravitropism bending growth in the creeping shoots of ground-cover chrysanthemum by suppression subtractive hybridization. Mol Biol Rep 2012; 40:237-46. [DOI: 10.1007/s11033-012-2054-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2012] [Accepted: 10/02/2012] [Indexed: 10/27/2022]
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Umezu N, Hanzawa N, Yamada MD, Kondo K, Mitsui T, Maruta S. Biochemical characterization of the novel rice kinesin K23 and its kinetic study using fluorescence resonance energy transfer between an intrinsic tryptophan residue and a fluorescent ATP analogue. J Biochem 2011; 149:539-50. [PMID: 21278385 DOI: 10.1093/jb/mvr012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We previously demonstrated that the rice kinesin K16, which belongs to the kinesin-7 subfamily, has unique enzymatic properties and atomic structure within key functional regions. In this study, we focused on a novel rice plant kinesin, K23, which also belongs to the kinesin-7 subfamily. The biochemical characterization of the K23 motor domain (K23MD) was studied and compared with the rice kinesin K16 and other related kinesins. K23 exhibits ∼45-fold (1.3 Pi mol(-1) site mol(-1) s(-1)) lower microtubule-dependent ATPase activity than conventional kinesins, whereas its affinity for microtubules is comparable with conventional kinesins. MgADP-free K23 is unstable compared with the unusually stable MgADP-free K16MD. The enzymatic properties of K23MD are somewhat different from those of K16. We used a fluorescent ATP analogue 2'(3')-O-(N'-methylanthraniloyl)-ATP (mant-ATP) for the kinetic characterization of K23. The fluorescence of mant-ATP was not significantly altered during its hydrolysis by K23. However, significant fluorescence resonance energy transfer (FRET) between mant-ATP and W21 in the motor domain was observed. The kinetic study using FRET revealed that K23 has unique kinetic characteristics when compared with other kinesins.
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Affiliation(s)
- Nozomi Umezu
- Division of Bioengineering, Graduate School of Engineering, Soka University, Hachioji, Tokyo 192-8577, Japan
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Umezu N, Umeki N, Mitsui T, Kondo K, Maruta S. Characterization of a novel rice kinesin O12 with a calponin homology domain. J Biochem 2011; 149:91-101. [PMID: 21047815 DOI: 10.1093/jb/mvq122] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Genomic analysis predicted that the rice (Oryza sativa var. japonica) genome encodes at least 41 kinesin-like proteins including the novel kinesin O12, which is classified as a kinesin-14 family member. O12 has a calponin homology (CH) domain that is known as an actin-binding domain. In this study, we expressed the functional domains of O12 in Escherichia coli and determined its enzymatic characteristics compared with other kinesins. The microtubule-dependent ATPase activity of recombinant O12 containing the motor and CH domains was significantly reduced in the presence of actin. Interestingly, microtubule-dependent ATPase activity of the motor domain was also affected by actin in the absence of the CH domain. Our findings suggest that the motor activity of the rice plant-specific kinesin O12 may be regulated by actin.
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Affiliation(s)
- Nozomi Umezu
- Division of Bioengineering, Graduate School of Engineering, Soka University, Hachioji, Tokyo 192-8577, Japan
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