Abstract
Heat shock protein 40 (HSP40), as an essential co-chaperone of HSP70, has been poorly investigated in planarians. In this study, a full-length cDNA of a HSP40 gene from planarian Dugesia japonica (designated Djhsp40) was identified and its expression pattern during planarian regeneration was examined. Its cDNA is 1,378 bp, which includes an open reading frame of 1,236 bp encoding 411 amino acids with a molecular weight of 46.2 kDa. DjHSP40 contains three conserved DNAJ domains belonging to the Type I HSP40/DNAJ family. After amputation is performed, Djhsp40 is up-regulated and the transcripts are specifically expressed in the blastema, and its inhibition by siRNA strongly delays the blastema growth. Interestingly, the silencing of Djhsp40 does not affect the expression level of neoblast-specific proliferation marker (Dj-mcm2 and DjpiwiB), but reduces Dj-mt-mmpA expression significantly. Our work provides a crucial clue for the study of the function of HSP40 in planarian regeneration.
Acknowledgements
We are grateful to Prof. Wei Wu and Dr. Hanxia Su (School of Life Sciences, Tsinghua University) for technical assistance with the in situ hybridization and microinjection. This work was supported by the National Natural Science Foundation of China (No. 31572267, 31471965, 31702010, 31170357), the Ph.D. Programs Foundation of Ministry of Education of China (No. 200804760003), the Outstanding Young Scientists Foundation of Henan Province (No. 0312001100), the Innovation Foundation of Henan Province (No. 2005126), and the Doctoral Scientific Research Startup Foundation of Henan Normal University (qd14173).
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- Abbreviations
- EST
expressed sequence tag
- HSP
heat shock protein
- MMP
matrix metalloproteinases
- qPCR
quantitative real-time RT-PCR
- RACE
rapid amplification of cDNA ends
- siRNA
small interfering RNA
- WISH
whole-mount in situ hybridization.
© 2017 Institute of Molecular Biology, Slovak Academy of Sciences
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- Zoology
- Identifying white spots on the roadmap of Late Pleistocene and Holocene palaeolimnology in Slovakia: Review and future directions
- Cellular and Molecular Biology
- Purification of small-size acidic proteoglycan-like domain of carbonic anhydrase IX fused with thioredoxine expressed in Escherichia coli for structural characterization
- Botany
- Functional and morphological traits of epiphytic lichens in the Western Carpathian oak forests reflect the influence of air quality and forest history
- Botany
- Clonostachys rosea associated with ponderosa and Coulter pine needles in Slovakia
- Botany
- First signs of old-growth structure and composition of an oak forest after four decades of abandonment
- Botany
- Factors responsible for the distribution of invasive plant species in the surroundings of railway areas. A case study from SE Poland
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- The role of lipids and polysaccharides in model root mucilage with implications for the surface activity of the rhizosphere
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- Physiological and proteomic changes in Zizania latifolia under chilling stress
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- Novel polymorphic EST-based microsatellite markers characterized in lettuce (Lactuca sativa)
- Cellular and Molecular Biology
- Identification of a HSP40 gene involved in planarian regeneration
- Zoology
- A new species of Bothropolys and a new record of Lithobius magnitergiferous (Lithobiidae) from the Qinghai-Tibet Plateau, China
- Zoology
- Myriapod (Chilopoda, Diplopoda) communities in hedgerows of upland agricultural landscape
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- A new cockroach, with bipectinate antennae,(Blattaria: Olidae fam. nov.) further highlights the differences between the Burmite and other faunas
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- Genetic structure of Apis mellifera carnica in Slovakia based on microsatellite DNA polymorphism
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