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Oliveira AP, Lopes AC, Silva M, Andrade PB, Valentão P. Exploring Montagu’s crab: Primary and secondary metabolites and enzyme inhibition. ARAB J CHEM 2019. [DOI: 10.1016/j.arabjc.2016.03.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Baringou S, Rouault JD, Koken M, Hardivillier Y, Hurtado L, Leignel V. Diversity of cytosolic HSP70 Heat Shock Protein from decapods and their phylogenetic placement within Arthropoda. Gene 2016; 591:97-107. [PMID: 27374152 DOI: 10.1016/j.gene.2016.06.061] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Revised: 05/25/2016] [Accepted: 06/29/2016] [Indexed: 01/16/2023]
Abstract
The 70kDa heat shock proteins (HSP70) are considered the most conserved members of the HSP family. These proteins are primordial to the cell, because of their implications in many cellular pathways (e. g., development, immunity) and also because they minimize the effects of multiple stresses (e. g., temperature, pollutants, salinity, radiations). In the cytosol, two ubiquitous HSP70s with either a constitutive (HSC70) or an inducible (HSP70) expression pattern are found in all metazoan species, encoded by 5 or 6 genes (Drosophila melanogaster or yeast and human respectively). The cytosolic HSP70 protein family is considered a major actor in environmental adaptation, and widely used in ecology as an important biomarker of environmental stress. Nevertheless, the diversity of cytosolic HSP70 remains unclear amongst the Athropoda phylum, especially within decapods. Using 122 new and 311 available sequences, we carried out analyses of the overall cytosolic HSP70 diversity in arthropods (with a focus on decapods) and inferred molecular phylogenies. Overall structural and phylogenetic analyses showed a surprisingly high diversity in cytosolic HSP70 and revealed the existence of several unrecognised groups. All crustacean HSP70 sequences present signature motifs and molecular weights characteristic of non-organellar HSP70, with multiple specific substitutions in the protein sequence. The cytosolic HSP70 family in arthropods appears to be constituted of at least three distinct groups (annotated as A, B and C), which comprise several subdivisions, including both constitutive and inducible forms. Group A is constituted by several classes of Arthropods, while group B and C seem to be specific to Malacostraca and Hexapoda/Chelicerata, respectively. The HSP70 organization appeared much more complex than previously suggested, and far beyond a simple differentiation according to their expression pattern (HSC70 versus HSP70). This study proposes a new classification of cytosolic HSP70 and an evolutionary model of the distinct forms amongst the Arthropoda phylum. The observed differences between HSP70 groups will probably have to be linked to distinct interactions with co-chaperones or other co-factors.
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Affiliation(s)
- Stephane Baringou
- Université du Maine, Laboratoire Mer-Molécules-Santé FR-CNRS 3473 IUML, Avenue Olivier Messiaen, 72085 Le Mans, France.
| | - Jacques-Deric Rouault
- Laboratoire Evolution, Génomes et Spéciation, UPR9034, CNRS, 91198 Gif-sur-Yvette, France; Université Paris, Sud 11, 91405, Orsay, France.
| | | | - Yann Hardivillier
- Université du Maine, Laboratoire Mer-Molécules-Santé FR-CNRS 3473 IUML, Avenue Olivier Messiaen, 72085 Le Mans, France.
| | - Luis Hurtado
- Department of Wildlife and Fisheries, Texas A&M University, Old Heep Building 110E, TAMU College Station, TX 77843-2258, USA.
| | - Vincent Leignel
- Université du Maine, Laboratoire Mer-Molécules-Santé FR-CNRS 3473 IUML, Avenue Olivier Messiaen, 72085 Le Mans, France.
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Cottin D, Foucreau N, Hervant F, Piscart C. Differential regulation of hsp70 genes in the freshwater key species Gammarus pulex (Crustacea, Amphipoda) exposed to thermal stress: effects of latitude and ontogeny. J Comp Physiol B 2015; 185:303-13. [PMID: 25588676 DOI: 10.1007/s00360-014-0885-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2014] [Revised: 11/17/2014] [Accepted: 12/28/2014] [Indexed: 11/28/2022]
Abstract
Temperature is one of the main abiotic factors influencing the distribution and abundance of organisms. In the Rhône River Valley, populations of the crustacean Gammarus pulex are distributed along a 5 °C thermal gradient from the North to the South of the valley. In this present work, we investigated the heat shock response of G. pulex according to latitudinal distribution (northern vs. southern populations) and ontogeny (adults vs. embryos from early stages). We isolated two isoforms (one constitutive hsc70 and one inducible hsp70) of heat shock proteins 70 (HSP70) and quantitatively compared their amounts of mRNA after heat shocks, using real-time PCR. Whereas the hsc70 (constitutive) gene did not vary between the two populations, a significant effect of the population was observed on the expression of the hsp70 (inducible) gene in adult specimens. The northern population of amphipods showed a greater magnitude of induction and a 2 °C lower onset temperature when compared to the southern population, suggesting that the northern population is more affected by elevated temperature than the southern one. We demonstrated that the expression of hsp70 may play a crucial role in the persistence of biogeographical patterns of G. pulex, since it reflects the natural distribution of this species along the latitudinal thermal gradient. A differential regulation of hsc70 gene was also observed according to the ontogenetic stage, with a switch from heat inducible in early life stages to constitutively and highly expressed in adults. These findings demonstrate the importance of considering the entire life cycle to better understand the adaptive response to thermal stress.
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Affiliation(s)
- Delphine Cottin
- UMR CNRS 5023, ENTPE, Laboratoire d'Écologie des Hydrosystèmes Naturels et Anthropisés, Université de Lyon, Université Lyon 1, 6 rue R. Dubois, 69622, Villeurbanne Cedex, France,
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Knigge T, Bachmann L, Köhler HR. An intron-containing, heat-inducible stress-70 gene in the millipede Tachypodoiulus niger (Julidae, Diplopoda). Cell Stress Chaperones 2014; 19:741-7. [PMID: 24446070 PMCID: PMC4147066 DOI: 10.1007/s12192-014-0494-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Revised: 12/27/2013] [Accepted: 01/01/2014] [Indexed: 10/25/2022] Open
Abstract
The highly conserved part of the nucleotide-binding domain of the hsp70 gene family was amplified from the soil diplopod Tachypodoiulus niger (Julidae, Diplopoda). Genomic DNA yielded 701, 549 and 540 bp sequences, whereas cDNA from heat shocked animals produced only one distinct fragment of 543 bp. The sequences could be classified as a 70 kDa heat shock protein (hsp70), the corresponding 70 kDa heat shock cognate (hsc70) and a glucose-related hsp70 homologue (grp78). Comparisons of genomic and cDNA sequences of hsc70 identified two introns within the consensus sequence. Generally, stress-70 expression levels were low, which hampered successful RT-PCR and subsequent subcloning. Following experimental heat shock, however, the spliced hsc70 was amplified predominantly, instead of its inducible homologue hsp70. This finding suggests that microevolution in this soil-dwelling arthropod is directed towards low constitutive stress-70 levels and that the capacity for stress-70 induction presumably is limited. hsc70, albeit having introns, apparently is inducible and contributes to the stress-70 response.
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Affiliation(s)
- Thomas Knigge
- Laboratory of Ecotoxicology, EA 3222 PRES Normandie, Le Havre University, 25 Rue Philippe Lebon, F-76058, Le Havre Cedex, France,
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Morris JP, Thatje S, Hauton C. The use of stress-70 proteins in physiology: a re-appraisal. Mol Ecol 2013; 22:1494-502. [PMID: 23599959 DOI: 10.1111/mec.12216] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
There are few factors more important to the mechanisms of evolution than stress. The stress response has formed as a result of natural selection, improving the capacity of organisms to withstand situations that require action.The ubiquity of the cellular stress response suggests that effective mechanisms to counteract stress emerged early in the history of life, and their commonality proves how vital such mechanisms are to operative evolution. The cellular stress response (CSR) has been identified as a characteristic of cells in all three domains of life and consists of a core 44 proteins that are structurally highly conserved and that have been termed the ‘minimal stressproteome’ (MSP). Within the MSP, the most intensely researched proteins are a family of heat-shock proteins known as HSP70. Superficially, correlations between the induction of stress and HSP70 differential expression support the use of HSP70 expression as a nonspecific biomarker of stress. However, we argue that too often authors have failed to question exactly what HSP70 differential expression signifies. Herein, we argue that HSP70 up-regulation in response to stressors has been shown to be far more complex than the commonly accepted quasi-linear relationship. In addition, in many instances, the uncertain identity and function of heat-shock proteins and heat-shock cognates has led to difficulties in interpretation of reports of inducible heat-shock proteins and constitutive heat-shock cognates. We caution against the broad application of HSP70 as a biomarker of stress in isolation and conclude that the application of HSP70 as a meaningful index of stress requires a higher degree of validation than the majority of research currently undertakes.
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Affiliation(s)
- J P Morris
- Ocean and Earth Science, National Oceanography Centre, Southampton, University of Southampton, Southampton, European Way, SO14 3ZH, UK.
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Yang Y, Ye H, Huang H, Li S, Liu X, Zeng X, Gong J. Expression of Hsp70 in the mud crab, Scylla paramamosain in response to bacterial, osmotic, and thermal stress. Cell Stress Chaperones 2013; 18:475-82. [PMID: 23325574 PMCID: PMC3682016 DOI: 10.1007/s12192-013-0402-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2012] [Revised: 12/25/2012] [Accepted: 01/02/2013] [Indexed: 10/27/2022] Open
Abstract
Hsp70 is involved in immune responses against infectious pathogens, thermal, and osmotic stress. To understand the immune defense mechanisms of the mud crab Scylla paramamosain, genomic DNA, transcript level and antimicrobial activities of Hsp70 were analyzed. Genomic DNA sequence analysis revealed one intron in this gene. Furthermore, six SNPs were detected by direct sequencing from 30 samples in this study. Hsp70 mRNA was expressed in almost all tissues examined. By using the quantitative real-time PCR, the expression level of Hsp70 in hemocytes showed a clear time-dependent expression pattern during the 96 h after stimulated by Vibrio alginolyticus. Then, recombinant Hsp70 was obtained by using the bacterial expression system, but no obvious antimicrobial activity has been found for the protein in the antimicrobial tests. After osmotic stress, the expression of Hsp70 in hemocytes showed this gene was induced by the high salinity (30 ‰) for at least 96 h. Hsp70 mRNA expression in hemocytes was analyzed after thermal stress at 6 h, the highest and the lowest expression level of Hsp70 was observed at 36 and 15 °C, respectively. These results indicated that Hsp70 was inducible by bacterial, osmotic, and thermal stress, and therefore plays an important role, different from antibacterial peptide, in innate immune responses of S. paramamosain.
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Affiliation(s)
- Ya’nan Yang
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361005 China
| | - Haihui Ye
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361005 China
| | - Huiyang Huang
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361005 China
| | - Shaojing Li
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361005 China
| | - Xueliang Liu
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361005 China
| | - Xianglan Zeng
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361005 China
| | - Jie Gong
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361005 China
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Fu W, Zhang F, Liao M, Liu M, Zheng B, Yang H, Zhong M. Molecular cloning and expression analysis of a cytosolic heat shock protein 70 gene from mud crab Scylla serrata. FISH & SHELLFISH IMMUNOLOGY 2013; 34:1306-1314. [PMID: 23481212 DOI: 10.1016/j.fsi.2013.02.027] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2012] [Revised: 02/16/2013] [Accepted: 02/20/2013] [Indexed: 06/01/2023]
Abstract
Heat shock protein 70s (Hsp70s) play important roles in resisting environmental stresses and stimulating innate immune system. To understand the immune defense mechanisms of Scylla serrata, a full-length cytosolic Hsp70 cDNA of S. serrata (designated as SSHsp70) was obtained by reverse transcriptase-polymerase chain reaction (RT-PCR) coupled with rapid amplification of cDNA ends (RACE). The full-length of SSHsp70 cDNA was 2235 bp, with a 5' untranslated region of 105 bp, a 3' untranslated region of 174 bp, and an open reading frame of 1956 bp encoding a polypeptide of 651 amino acids with an estimated molecular mass of 71.3 kDa and an estimated isoelectric point of 5.55. The cloned SSHsp70 belonged to a cytosolic Hsp70 family. Three typical Hsp70 signature motifs were detected in SSHsp70 by InterPro analysis. Quantitative PCR (qPCR) was used to detect tissue distribution and mRNA expression levels of SSHsp70 under different stress conditions. The obviously high levels of SSHsp70 transcript were in hemocyte, heart, hepatopancreas and gill, whereas low levels were detected in muscle, eyestalk, stomach, and gut. In different temperature treatments, the expression levels of SSHsp70 in low or high temperatures were higher than those in temperate temperature. In pathogen challenge treatments, the mRNA expression level of SSHsp70 reached a maximum level after 18 h and then dropped progressively. In different salt concentration treatments, the mRNA expression level of SSHsp70 had a minimum level at 25‰ salt concentration and high expression levels at high or low salt concentration. In different nitrite concentration treatments, the mRNA expression level of SSHsp70 increased progressively with the increase of nitrite concentration. The results confirmed Hsp70 could be used as a tool for evolution and phylogenetic analysis, a kind of potential biomarker, and a disease resistance factor used in application.
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Affiliation(s)
- Wandong Fu
- Zhejiang Marine Development Research Institute, Zhoushan 316100, PR China.
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Rosic NN, Leggat W, Kaniewska P, Dove S, Hoegh-Guldberg O. New-old hemoglobin-like proteins of symbiotic dinoflagellates. Ecol Evol 2013; 3:822-34. [PMID: 23610627 PMCID: PMC3631397 DOI: 10.1002/ece3.498] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2012] [Revised: 01/04/2013] [Accepted: 01/17/2013] [Indexed: 11/24/2022] Open
Abstract
Symbiotic dinoflagellates are unicellular photosynthetic algae that live in mutualistic symbioses with many marine organisms. Within the transcriptome of coral endosymbionts Symbiodinium sp. (type C3), we discovered the sequences of two novel and highly polymorphic hemoglobin-like genes and proposed their 3D protein structures. At the protein level, four isoforms shared between 87 and 97% sequence identity for Hb-1 and 78-99% for Hb-2, whereas between Hb-1 and Hb-2 proteins, only 15-21% sequence homology has been preserved. Phylogenetic analyses of the dinoflagellate encoding Hb sequences have revealed a separate evolutionary origin of the discovered globin genes and indicated the possibility of horizontal gene transfer. Transcriptional regulation of the Hb-like genes was studied in the reef-building coral Acropora aspera exposed to elevated temperatures (6-7°C above average sea temperature) over a 24-h period and a 72-h period, as well as to nutrient stress. Exposure to elevated temperatures resulted in an increased Hb-1 gene expression of 31% after 72 h only, whereas transcript abundance of the Hb-2 gene was enhanced by up to 59% by both 1-day and 3-day thermal stress conditions. Nutrient stress also increased gene expression of Hb-2 gene by 70%. Our findings describe the differential expression patterns of two novel Hb genes from symbiotic dinoflagellates and their polymorphic nature. Furthermore, the inducible nature of Hb-2 gene by both thermal and nutrient stressors indicates a prospective role of this form of hemoglobin in the initial coral-algal responses to changes in environmental conditions. This novel hemoglobin has potential use as a stress biomarker.
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Affiliation(s)
- Nedeljka N Rosic
- School of Biological Sciences, The University of Queensland St. Lucia, Qld, 4072, Australia
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Bedulina DS, Evgen'ev MB, Timofeyev MA, Protopopova MV, Garbuz DG, Pavlichenko VV, Luckenbach T, Shatilina ZM, Axenov-Gribanov DV, Gurkov AN, Sokolova IM, Zatsepina OG. Expression patterns and organization of thehsp70genes correlate with thermotolerance in two congener endemic amphipod species (Eulimnogammarus cyaneusandE. verrucosus) from Lake Baikal. Mol Ecol 2013; 22:1416-30. [DOI: 10.1111/mec.12136] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2012] [Revised: 10/09/2012] [Accepted: 10/10/2012] [Indexed: 12/14/2022]
Affiliation(s)
- D. S. Bedulina
- Irkutsk State University; Karl-Marx str. 1 Irkutsk 664003 Russia
- Baikal Research Centre; Lenina str. 3 Irkutsk 664003 Russia
| | - M. B. Evgen'ev
- Engelhardt Institute of Molecular Biology; Russian Academy of Sciences; Vaviolva str. 32 Moscow 119991 Russia
- Institute of Cell Biophysics; Russian Academy of Sciences; Institutskaya str. 3 Pushchino 142290 Russia
| | - M. A. Timofeyev
- Irkutsk State University; Karl-Marx str. 1 Irkutsk 664003 Russia
- Baikal Research Centre; Lenina str. 3 Irkutsk 664003 Russia
| | - M. V. Protopopova
- Irkutsk State University; Karl-Marx str. 1 Irkutsk 664003 Russia
- Siberian Institute of Plant Physiology and Biochemistry; Siberian Branch Russian Academy of Sciences; Lermontov str. 132 Irkutsk 664033 Russia
| | - D. G. Garbuz
- Engelhardt Institute of Molecular Biology; Russian Academy of Sciences; Vaviolva str. 32 Moscow 119991 Russia
| | - V. V. Pavlichenko
- Irkutsk State University; Karl-Marx str. 1 Irkutsk 664003 Russia
- Siberian Institute of Plant Physiology and Biochemistry; Siberian Branch Russian Academy of Sciences; Lermontov str. 132 Irkutsk 664033 Russia
| | - T. Luckenbach
- UFZ Helmholtz Centre for Environmental Research; Department of Bioanalytical Ecotoxicology; Permoserstr.15 Leipzig 04318 Germany
| | - Z. M. Shatilina
- Irkutsk State University; Karl-Marx str. 1 Irkutsk 664003 Russia
- Baikal Research Centre; Lenina str. 3 Irkutsk 664003 Russia
| | - D. V. Axenov-Gribanov
- Irkutsk State University; Karl-Marx str. 1 Irkutsk 664003 Russia
- Baikal Research Centre; Lenina str. 3 Irkutsk 664003 Russia
| | - A. N. Gurkov
- Irkutsk State University; Karl-Marx str. 1 Irkutsk 664003 Russia
- Baikal Research Centre; Lenina str. 3 Irkutsk 664003 Russia
| | - I. M. Sokolova
- Department of Biology; University of North Carolina at Charlotte; 9201 University City Blvd. Charlotte NC 28223 USA
| | - O. G. Zatsepina
- Engelhardt Institute of Molecular Biology; Russian Academy of Sciences; Vaviolva str. 32 Moscow 119991 Russia
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Phylogenetic analysis of genes involved in mycosporine-like amino acid biosynthesis in symbiotic dinoflagellates. Appl Microbiol Biotechnol 2012; 94:29-37. [PMID: 22361857 DOI: 10.1007/s00253-012-3925-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2011] [Revised: 01/23/2012] [Accepted: 01/25/2012] [Indexed: 01/26/2023]
Abstract
Mycosporine-like amino acids (MAAs) are multifunctional secondary metabolites involved in photoprotection in many marine organisms. As well as having broad ultraviolet (UV) absorption spectra (310-362 nm), these biological sunscreens are also involved in the prevention of oxidative stress. More than 20 different MAAs have been discovered so far, characterized by distinctive chemical structures and a broad ecological distribution. Additionally, UV-screening MAA metabolites have been investigated and used in biotechnology and cosmetics. The biosynthesis of MAAs has been suggested to occur via either the shikimate or pentose phosphate pathways. Despite their wide distribution in marine and freshwater species and also the commercial application in cosmetic products, there are still a number of uncertainties regarding the genetic, biochemical, and evolutionary origin of MAAs. Here, using a transcriptome-mining approach, we identify the gene counterparts from the shikimate or pentose phosphate pathway involved in MAA biosynthesis within the sequences of the reef-building coral symbiotic dinoflagellates (genus Symbiodinium). We also report the highly similar sequences of genes from the proposed MAA biosynthetic pathway involved in the metabolism of 4-deoxygadusol (direct MAA precursor) in various Symbiodinium strains confirming their algal origin and conserved nature. Finally, we reveal the separate identity of two O-methyltransferase genes, possibly involved in MAA biosynthesis, as well as nonribosomal peptide synthetase and adenosine triphosphate grasp homologs in symbiotic dinoflagellates. This study provides a biochemical and phylogenetic overview of the genes from the proposed MAA biosynthetic pathway with a focus on coral endosymbionts.
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Rosic NN, Pernice M, Dove S, Dunn S, Hoegh-Guldberg O. Gene expression profiles of cytosolic heat shock proteins Hsp70 and Hsp90 from symbiotic dinoflagellates in response to thermal stress: possible implications for coral bleaching. Cell Stress Chaperones 2011; 16:69-80. [PMID: 20821176 PMCID: PMC3024090 DOI: 10.1007/s12192-010-0222-x] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2010] [Revised: 08/12/2010] [Accepted: 08/13/2010] [Indexed: 02/07/2023] Open
Abstract
Unicellular photosynthetic dinoflagellates of the genus Symbiodinium are the most common endosymbionts of reef-building scleractinian corals, living in a symbiotic partnership known to be highly susceptible to environmental changes such as hyperthermic stress. In this study, we identified members of two major heat shock proteins (HSPs) families, Hsp70 and Hsp90, in Symbiodinium sp. (clade C) with full-length sequences that showed the highest similarity and evolutionary relationship with other known HSPs from dinoflagellate protists. Regulation of HSPs gene expression was examined in samples of the scleractinian coral Acropora millepora subjected to elevated temperatures progressively over 18 h (fast) and 120 h (gradual thermal stress). Moderate to severe heat stress at 26°C and 29°C (+3°C and +6°C above average sea temperature) resulted in an increase in algal Hsp70 gene expression from 39% to 57%, while extreme heat stress (+9°C) reduced Hsp70 transcript abundance by 60% (after 18 h) and 70% (after 120 h). Elevated temperatures decreased an Hsp90 expression under both rapid and gradual heat stress scenarios. Comparable Hsp70 and Hsp90 gene expression patterns were observed in Symbiodinium cultures and in hospite, indicating their independent regulation from the host. Differential gene expression profiles observed for Hsp70 and Hsp90 suggests diverse roles of these molecular chaperones during heat stress response. Reduced expression of the Hsp90 gene under heat stress can indicate a reduced role in inhibiting the heat shock transcription factor which may lead to activation of heat-inducible genes and heat acclimation.
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Affiliation(s)
- Nedeljka N Rosic
- Global Change Institute, The University of Queensland, St. Lucia, 4072, Queensland, Australia.
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Yang JS, Nagasawa H, Fujiwara Y, Tsuchida S, Yang WJ. The complete mitogenome of the hydrothermal vent crab Gandalfus yunohana (Crustacea: Decapoda: Brachyura): a link between the Bythograeoidea and Xanthoidea. ZOOL SCR 2010. [DOI: 10.1111/j.1463-6409.2010.00442.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Colson-Proch C, Morales A, Hervant F, Konecny L, Moulin C, Douady CJ. First cellular approach of the effects of global warming on groundwater organisms: a study of the HSP70 gene expression. Cell Stress Chaperones 2010; 15:259-70. [PMID: 19777376 PMCID: PMC2867000 DOI: 10.1007/s12192-009-0139-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2009] [Accepted: 08/17/2009] [Indexed: 10/20/2022] Open
Abstract
Whereas the consequences of global warming at population or community levels are well documented, studies at the cellular level are still scarce. The study of the physiological or metabolic effects of such small increases in temperature (between +2 degrees C and +6 degrees C) is difficult because they are below the amplitude of the daily or seasonal thermal variations occurring in most environments. In contrast, subterranean biotopes are highly thermally buffered (+/-1 degrees C within a year), and underground water organisms could thus be particularly well suited to characterise cellular responses of global warming. To this purpose, we studied genes encoding chaperone proteins of the HSP70 family in amphipod crustaceans belonging to the ubiquitous subterranean genus Niphargus. An HSP70 sequence was identified in eight populations of two complexes of species of the Niphargus genus (Niphargus rhenorhodanensis and Niphargus virei complexes). Expression profiles were determined for one of these by reverse transcription and quantitative polymerase chain reaction, confirming the inducible nature of this gene. An increase in temperature of 2 degrees C seemed to be without effect on N. rhenorhodanensis physiology, whereas a heat shock of +6 degrees C represented an important thermal stress for these individuals. Thus, this study shows that although Niphargus individuals do not undergo any daily or seasonal thermal variations in underground water, they display an inducible HSP70 heat shock response. This controlled laboratory-based physiological experiment constitutes a first step towards field investigations of the cellular consequences of global warming on subterranean organisms.
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Clark MS, Peck LS. Triggers of the HSP70 stress response: environmental responses and laboratory manipulation in an Antarctic marine invertebrate (Nacella concinna). Cell Stress Chaperones 2009; 14:649-60. [PMID: 19404777 PMCID: PMC2866954 DOI: 10.1007/s12192-009-0117-x] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2009] [Revised: 04/06/2009] [Accepted: 04/15/2009] [Indexed: 10/20/2022] Open
Abstract
The Antarctic limpet, Nacella concinna, exhibits the classical heat shock response, with up-regulation of duplicated forms of the inducible heat shock protein 70 (HSP70) gene in response to experimental manipulation of seawater temperatures. However, this response only occurs in the laboratory at temperatures well in excess of any experienced in the field. Subsequent environmental sampling of inter-tidal animals also showed up-regulation of these genes, but at temperature thresholds much lower than those required to elicit a response in the laboratory. It was hypothesised that this was a reflection of the complexity of the stresses encountered in the inter-tidal region. Here, we describe a further series of experiments comprising both laboratory manipulation and environmental sampling of N. concinna. We investigate the expression of HSP70 gene family members (HSP70A, HSP70B, GRP78 and HSC70) in response to a further suite of environmental stressors: seasonal and experimental cold, freshwater, desiccation, chronic heat and periodic emersion. Lowered temperatures (-1.9 degrees C and -1.6 degrees C), generally produced a down-regulation of all HSP70 family members, with some up-regulation of HSC70 when emerging from the winter period and increasing sea temperatures. There was no significant response to freshwater immersion. In response to acute and chronic heat treatments plus simulated tidal cycles, the data showed a clear pattern. HSP70A showed a strong but very short-term response to heat whilst the duplicated HSP70B also showed heat to be a trigger, but had a more sustained response to complex stresses. GRP78 expression indicates that it was acting as a generalised stress response under the experimental conditions described here. HSC70 was the major chaperone invoked in response to long-term stresses of varying types. These results provide intriguing clues not only to the complexity of HSP70 gene expression in response to environmental change but also insights into the stress response of a non-model species.
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Affiliation(s)
- Melody S Clark
- Biological Sciences Division, British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, UK.
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Marchand J, Leignel V, Moreau B, Chénais B. Characterization and sequence analysis of manganese superoxide dismutases from Brachyura (Crustacea: Decapoda): Hydrothermal Bythograeidae versus littoral crabs. Comp Biochem Physiol B Biochem Mol Biol 2009; 153:191-9. [DOI: 10.1016/j.cbpb.2009.02.019] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2008] [Revised: 02/26/2009] [Accepted: 02/28/2009] [Indexed: 11/30/2022]
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Clark MS, Peck LS. HSP70 heat shock proteins and environmental stress in Antarctic marine organisms: A mini-review. Mar Genomics 2009; 2:11-8. [DOI: 10.1016/j.margen.2009.03.003] [Citation(s) in RCA: 127] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2008] [Revised: 02/03/2009] [Accepted: 03/02/2009] [Indexed: 11/25/2022]
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Cottin D, Ravaux J, Léger N, Halary S, Toullec JY, Sarradin PM, Gaill F, Shillito B. Thermal biology of the deep-sea vent annelidParalvinella grasslei:in vivostudies. J Exp Biol 2008; 211:2196-204. [DOI: 10.1242/jeb.018606] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
SUMMARYThe annelid Paralvinella grasslei is a deep-sea vent endemic species that colonizes the wall of active chimneys. We report here the first data on its thermal biology based on in vivo experiments in pressurized aquaria. Our results demonstrate that P. grassleisurvives a 30 min exposure at 30°C, and suggest that the upper thermal limit of this species is slightly above this temperature. The first signs of stress were noticed at 30°C, such as a significant increase in the animal's activity and the expression of HSP70 stress proteins. A preliminary investigation of the kinetics of stress protein expression surprisingly showed high levels of HSP70 proteins as late as 3.5 h after the heat shock. Finally,we provide here the first sequences for vent annelid hsp70 (P. grasslei, Hesiolyra bergi and Alvinella pompejana). These constitute valuable tools for future studies on the thermal biology of these annelids.
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Affiliation(s)
- Delphine Cottin
- UPMC Université Paris 6, UMR 7138, `Systématique, Adaptation et Evolution', F-75005 Paris, France
- CNRS UMR 7138, `Systématique, Adaptation et Evolution', F-75005, Paris,France
| | - Juliette Ravaux
- UPMC Université Paris 6, UMR 7138, `Systématique, Adaptation et Evolution', F-75005 Paris, France
- CNRS UMR 7138, `Systématique, Adaptation et Evolution', F-75005, Paris,France
| | - Nelly Léger
- UPMC Université Paris 6, UMR 7138, `Systématique, Adaptation et Evolution', F-75005 Paris, France
- CNRS UMR 7138, `Systématique, Adaptation et Evolution', F-75005, Paris,France
| | - Sébastien Halary
- UPMC Université Paris 6, UMR 7138, `Systématique, Adaptation et Evolution', F-75005 Paris, France
- CNRS UMR 7138, `Systématique, Adaptation et Evolution', F-75005, Paris,France
| | - Jean-Yves Toullec
- UPMC Université Paris 6, FRE 2852 `Protéines: Biochimie Structurale et Fonctionnelle', F-75005 Paris, France
- CNRS FRE 2852 `Protéines: Biochimie Structurale et Fonctionnelle',F-75005 Paris, France
| | - Pierre-Marie Sarradin
- DEEP/Laboratoire Environnement Profond, Centre IFREMER de Brest, bp 70, 29280 Plouzané, Cedex, France
| | - Françoise Gaill
- UPMC Université Paris 6, UMR 7138, `Systématique, Adaptation et Evolution', F-75005 Paris, France
- CNRS UMR 7138, `Systématique, Adaptation et Evolution', F-75005, Paris,France
| | - Bruce Shillito
- UPMC Université Paris 6, UMR 7138, `Systématique, Adaptation et Evolution', F-75005 Paris, France
- CNRS UMR 7138, `Systématique, Adaptation et Evolution', F-75005, Paris,France
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