Acta Agriculturae Boreali-Sinica ›› 2023, Vol. 38 ›› Issue (2): 85-92. doi: 10.7668/hbnxb.20192958

Special Issue: Biotechnology

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Cloning and Expression Analysis of Castor Calcium Dependent Protein Kinase 29 Gene

WANG Ying, WANG Xiaoyu, SUN Dehui, HUO Hongyan, LIU Haichen, XU Hui, ZHANG Jixing   

  1. College of Life Sciences and Food Engineering,Inner Mongolia Minzu University,Tongliao 028000,China
  • Received:2022-10-17 Published:2023-04-28

Abstract:

To investigate the role of RcCDPK29 in salt tolerance of castor, we designed specific primers to clone the calcium-dependent protein kinase 29 gene (RcCDPK29) from castor leaves and performed bioinformatics analysis of the resulting sequence. The results showed that the sequence of RcCDPK29 was 1 590 bp, encoding 528 amino acids, with a molecular weight of 59.74 ku and an isoelectric point (pI) value of 6.21. It is a typical non-transmembrane protein with a negative hydrophilic value and a hydrophilic protein with a maximum of 228 α-helices. The similarity of RcCDPK29 to Arabidopsis CDPK (SMTL ID: 3q5i.1) was 40.41% with high confidence(>30%). The amino acid sequences of Manihot esculenta, Jatropha curcas,Hevea Brasiliensis,Citrus sinensis,Punica granatum,Populus trichocarpa and Ricinus communis RcCDPK29 were compared for homology. Among them, the highest homology with Jatropha was 82.29%. The RcCDPK29 protein contained a Ser/Thr protein kinase catalytic domain and four Ca2+-binding EF-hand-type structural domains. The expression of RcCDPK29 in different tissues of castor under different levels of salt stress was analyzed by qRT-PCR. The results showed that the RcCDPK29 gene was mainly expressed in the stem, with the highest expression at 12 h of salt treatment. With the extension of salt treatment time, the expression of RcCDPK29 gene in roots gradually decreased and reached the lowest at 2, 8,24 h, respectively,with significant differences from 0 h;the expression of leaves was the lowest at 2 h and significantly different compared with 0 h. The full length of RcCDPK29 was amplified by designing primers with SmaⅠand XbaⅠdigestion sites, and then ligated with the expression vector pCG-3300 after double digestion with SmaⅠand XbaⅠ. The expression vector of RcCDPK29 was successfully constructed. Thus, RcCDPK29 plays an important role when castor is subjected to salt stress.

Key words: Castor, Calcium dependent protein kinase, Gene cloning, Bioinformatics analysis, Eexpression vector

Cite this article

WANG Ying, WANG Xiaoyu, SUN Dehui, HUO Hongyan, LIU Haichen, XU Hui, ZHANG Jixing. Cloning and Expression Analysis of Castor Calcium Dependent Protein Kinase 29 Gene[J]. Acta Agriculturae Boreali-Sinica, 2023, 38(2): 85-92. doi: 10.7668/hbnxb.20192958.

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