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022 _a0176-1617
040 _aMSU
_bEnglish
_cMSU
_erda
050 0 0 _aQK711.2 JOU
100 1 _aZhang, Jun
_eauthor
245 1 0 _aTranscriptomic screening for cyclotides and other cysteine-rich proteins in the metallophyte Viola baoshanensis
_ccreated by Jun Zhang, Jintian Li, Zebo Huang, Bing Yang, Xiaojie Zhang, Dehua Li, David J Craik, Alan J M Baker, Wensheng Shu and Bin Liao
264 1 _aAmsterdam:
_bElsevier GmbH,
_c2015.
336 _2rdacontent
_atext
_btxt
337 _2rdamedia
_aunmediated
_bn
338 _2rdacarrier
_avolume
_bnc
440 _aJournal of plant physiology
_vVolume 180
520 3 _aCysteine (Cys)-rich proteins (CRPs) are frequently associated with plant defense and stress resistance. Viola baoshanensis is a cadmium (Cd) hyper-accumulating plant whose CRPs-based defense systems are so far poorly understood. Next generation sequencing (NGS) techniques and a specialist searching tool, CrpExcel, were employed for identifying CRPs in V. baoshanensis. The transcriptome sequences of V. baoshanensis were assembled primarily from 454FLX/Hiseq2000 reads of plant cDNA sequencing libraries. CrpExcel was then used to search the ORFs and 9687 CRPs were identified, and included zinc finger (ZF) proteins, lipid transfer proteins, thaumatins and cyclotide precursors. Real-time PCR results showed that all CRP genes tested are constitutively expressed, but the genes of defensive peptides showed greater up-regulated expression than those of ZF-proteins in Cd- and/or wounding (Wd) treatments of V. baoshanensis seedlings. The NGS-derived sequences of cyclotide precursor genes were verified by RT-PCR and ABI3730 sequencing studies, and 32 novel cyclotides were identified in V. baoshanensis. In general, the metal-binding sites of ZF-containing CRPs also represented the potential vulnerable targets of toxic metals. This study provides broad insights into CRPs-based defense systems and stress-vulnerable targets in V. baoshanensis. It now brings the number of cyclotide sequences in V. baoshanensis to 53 and based on projections from this work, the number of cyclotides in the Violaceae is now conservatively estimated to be >30000.
650 _aCrpExcel
650 _aCyclotides
650 _aCysteine-rich proteins
700 1 _aLi, Jintian
_eco-author
700 1 _aHuang, Zebo
_eco-author
700 1 _aYang, Bing
_eco-author
700 1 _aZhang, Xiaojie
_eco-author
700 1 _aLi, Dehua
_eco-author
700 1 _aCraik, David J
_eco-author
700 1 _aBaker, Alan J M
_eco-author
700 1 _aShu, Wensheng
_eco-author
700 1 _aLiao, Bin
_eco-author
856 _uhttps://doi.org/10.1016/j.jplph.2015.01.017
942 _2lcc
_cJA
999 _c169272
_d169272