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Cheng Y, Lu L, Yang Z, Wu Z, Qin W, Yu D, Ren Z, Li Y, Wang L, Li F, Yang Z. GhCaM7-like, a calcium sensor gene, influences cotton fiber elongation and biomass production. Plant Physiol Biochem 2016; 109:128-136. [PMID: 27669397 DOI: 10.1016/j.plaphy.2016.09.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 08/31/2016] [Accepted: 09/12/2016] [Indexed: 05/26/2023]
Abstract
Calcium signaling regulates many developmental processes in plants. Calmodulin (CaM) is one of the most conserved calcium sensors and has a flexible conformation in eukaryotes. The molecular functions of CaM are unknown in cotton, which is a major source of natural fiber. In this study, a Gossypium hirsutum L.CaM7-like gene was isolated from upland cotton. Bioinformatics analysis indicated that the GhCaM7-like gene was highly conserved as compared with Arabidopsis AtCaM7. The GhCaM7-like gene showed a high expression level in elongating fibers. Expression of β-glucuronidase was observed in trichomes on the stem, leaf and root in transgenic Arabidopsis plants of a PROGhCaM7-like:GUS fusion. Silencing of the GhCaM7-like gene resulted in decreased fiber length, but also caused reduction in stem height, leaf dimensions, seed length and 100-seed weight, in comparison with those of the control. Reduced expression of the GhCaM7-like gene caused decreased Ca2+ influx in cells of the leaf hypodermis and stem apex, and down-regulation of GhIQD1 (IQ67-domain containing protein), GhAnn2 (Annexins) and GhEXP2 (Expansin). These results indicate that the GhCaM7-like gene plays a vital role in calcium signaling pathways, and may regulate cotton fiber elongation and biomass production by affecting Ca2+ signatures and downstream signaling pathways of CaM.
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Affiliation(s)
- Yuan Cheng
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, China; Huazhong Agricultural University, Wuhan 430070, China
| | - Lili Lu
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, China
| | - Zhaoen Yang
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, China
| | - Zhixia Wu
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, China
| | - Wenqiang Qin
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, China
| | - Daoqian Yu
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, China
| | - Zhongying Ren
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, China
| | - Yi Li
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, China
| | - Lingling Wang
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, China
| | - Fuguang Li
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, China.
| | - Zuoren Yang
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, China.
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Kawai-Yamada M, Hori Z, Ogawa T, Ihara-Ohori Y, Tamura K, Nagano M, Ishikawa T, Uchimiya H. Loss of calmodulin binding to Bax inhibitor-1 affects Pseudomonas-mediated hypersensitive response-associated cell death in Arabidopsis thaliana. J Biol Chem 2009; 284:27998-28003. [PMID: 19674971 PMCID: PMC2788852 DOI: 10.1074/jbc.m109.037234] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2009] [Revised: 08/05/2009] [Indexed: 12/18/2022] Open
Abstract
Bax inhibitor-1 (BI-1) is a cell death suppressor protein conserved across a variety of organisms. The Arabidopsis atbi1-1 plant is a mutant in which the C-terminal 6 amino acids of the expressed BI-1 protein have been replaced by T-DNA insertion. This mutant BI-1 protein (AtBI-CM) produced in Escherichia coli can no longer bind to calmodulin. A promoter-reporter assay demonstrated compartmentalized expression of BI-1 during hypersensitive response, introduced by the inoculation of Pseudomonas syringae possessing the avrRTP2 gene, Pst(avrRPT2). In addition, both BI-1 knockdown plants and atbi1-1 showed increased sensitivity to Pst(avrRPT2)-induced cell death. The results indicated that the loss of calmodulin binding reduces the cell death suppressor activity of BI-1 in planta.
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Affiliation(s)
- Maki Kawai-Yamada
- Department of Environmental Science and Technology, Saitama University, 255 Shimo-Okubo, Sakura-ku, Saitama 338-8570; Institute of Molecular and Cellular Biosciences, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-0032; Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), Saitama 332-0012, Japan; Institute for Environmental Science and Technology, Saitama University, 255 Shimo-Okubo, Sakura-ku, Saitama 338-8570.
| | - Zenta Hori
- Institute of Molecular and Cellular Biosciences, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-0032
| | - Taro Ogawa
- Institute of Molecular and Cellular Biosciences, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-0032
| | - Yuri Ihara-Ohori
- Institute of Molecular and Cellular Biosciences, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-0032
| | - Katsunori Tamura
- Institute of Molecular and Cellular Biosciences, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-0032
| | - Minoru Nagano
- Institute of Molecular and Cellular Biosciences, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-0032
| | - Toshiki Ishikawa
- Department of Environmental Science and Technology, Saitama University, 255 Shimo-Okubo, Sakura-ku, Saitama 338-8570; Institute of Molecular and Cellular Biosciences, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-0032; Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), Saitama 332-0012, Japan
| | - Hirofumi Uchimiya
- Institute of Molecular and Cellular Biosciences, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-0032; Iwate Biotechnology Research Center, Kitakami, Iwate 024-0003
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Abstract
The intracellular calcium sensor protein calmodulin (CaM) interacts with a large number of proteins to regulate their biological functions in response to calcium stimulus. This molecular recognition process is diverse in its mechanism, but can be grouped into several classes based on structural and sequence information. We have developed a web-based database (http://calcium.uhnres.utoronto.ca/ctdb) for this family of proteins containing CaM binding sites or, as we propose to call it herein, CaM recruitment signaling (CRS) motifs. At present the CRS motif found in approximately 180 protein sequences in the databases can be divided into four subclasses, each subclass representing a distinct structural mode of molecular recognition involving CaM. The database can predict a putative CRS location within a given protein sequence, identify the subclass to which it may belong, and structural and biophysical parameters such as hydrophobicity, hydrophobic moment, and propensity for alpha-helix formation.
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Affiliation(s)
- K L Yap
- Division of Molecular and Structural Biology, Ontario Cancer Institute and Department of Medical Biophysics, University of Toronto, 610 University Avenue, Toronto, Ontario, M5G 2M9, Canada
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Itabashi T, Mikami K, Asai H. Characterization of the spasmin 1 gene in Zoothamnium arbuscula strain Kawagoe (protozoa, ciliophora) and its relation to other spasmins and centrins. Res Microbiol 2003; 154:361-7. [PMID: 12837512 DOI: 10.1016/s0923-2508(03)00050-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Zoothamnium arbuscula strain Kawagoe is a giant sessile peritrich ciliated protozoa that possesses a contractile organelle called a spasmoneme. We report here on the molecular characterization and provide an opportunity to discuss the evolutionary relationships of the Z. arbuscula spasmin; spasmins belong to the calmodulin superfamily and are the major components of spasmoneme filaments. We analysed and obtained the whole sequence of the spasmin 1 gene and a partial sequence of the spasmin 2 gene. It is surprising that the sequence of spasmin 1 does not contain introns and encodes an open reading frame of 531 bp. It predicts a product of 177 amino acids with a calculated molecular mass of 19659 Da and a pI of 4.68. The amino acid sequence has two putative calcium-binding domains. One of them is a functional domain, as defined by the EF-hand consensus. The varieties of spasmins were revealed by comparison with amino acid components and molecular relationships of spasmin 1 protein and other spasmins. A comparison of the amino acid sequence between the Z. arbuscula spasmin and known centrins indicates that spasmins have a one residue deletion in the EF-hand domain-2 and four residue insertions in domain-4, as does the Vorticella spasmin. However, there are large variations in the amino acid sequence at domain-4 within spasmin 1, spasmin 2 and the Vorticella spasmin.
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Affiliation(s)
- Takeshi Itabashi
- Department of Physics, School of Science and Engineering, Waseda University, 169-8555, Tokyo, Japan.
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Abstract
Calmodulin is a major calcium-binding protein in the mammalian brain, playing an important role in neuronal cell function. Its amino acid sequence is highly conserved and the protein is encoded by multiple genes. In the mouse brain, as well as in the rat and the human brain, three different genes have been detected for calmodulin, CaM I, CaM II and CaM III, all of which encode an identical protein. We studied the pattern of expression of the three calmodulin genes and the pattern of calmodulin distribution in the mouse brain by in situ hybridization histochemistry and immunohistochemistry. We found that calmodulin messenger RNAs from the three calmodulin genes were widely expressed in the mouse brain. Nevertheless, there were differences in their patterns of distribution. In general, all calmodulin messenger RNAs were preferentially distributed in hippocampus, cerebral cortex and cerebellar cortex, and CaM II messenger RNA also in caudate-putamen. However, all messenger RNAs showed clearly differentiated patterns of distribution in the hippocampus and the cerebellar cortex. Calmodulin immunoreactivity was present in all cells so far examined. Immunostaining was observed both in the cell nucleus, where it was especially strong, and in the cytoplasm. Our results suggest that the three calmodulin genes are differentially regulated in the mouse brain and also that, although all calmodulin genes have a basal expression, precise regulation of calmodulin levels might be attained through the different contribution of the three calmodulin genes.
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Affiliation(s)
- C Solà
- Department of Pharmacology and Toxicology, Institut d'Investigacions Biomèdiques de Barcelona, CSIC, Spain
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