Cloning and characterization of endo-β-1,4-glucanase genes in the common wheat line three pistils

Genetics and Molecular Biology

Zaijun Yang¹  Zhengsong Peng¹  Shuhong Wei¹  Yan Yu¹ 

[1],China West Normal University Key Laboratory of Southwest China Wildlife Resources Conservation Nanchong City Sichuan ,People's Republic of China

关键词: cloning;    endo-β-1;    4-glucanase;    three pistils line;    wheat;   

DOI  :  10.1590/S1415-47572013000300015

来源: SciELO

【 摘 要 】

In this work, we report the cloning and characterization of endo-β-1,4-glucanase (EGase) genes (TaEG) in the common wheat line three pistils. Three TaEG homoeologous genes (TaEG-4A, TaEG-4B and TaEG-4D) were isolated and found to be located on chromosomes 4AL, 4BS and 4DS, respectively. The three genes showed high conservation of their coding nucleotide sequences and 3 untranslated region. The putative TaEG protein had a molecular mass of 69 kDa, a theoretical pI of 9.39 and a transmembrane domain of 74-96 amino acids in the N-terminus that anchored the protein to the membrane. The genome sequences of TaEG-4A, TaEG-4B and TaEG-4D contained six exons and five introns. All of the introns, except for intron IV, varied in length and sequence composition. Phylogenetic analysis revealed that TaEG was most closely related to rice (Oryza sativa) OsGLU1. The TaEG transcript levels increased significantly during the subsidiary pistil primordium differentiation phase (spike size ~7-10 mm) in Chuanmai 28 TP (CM28TP). These data provide a basis for future research into the function of TaEG and offer insights into the molecular mechanism of the three pistils mutation in wheat.

【 授权许可】

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