高级检索+

裸燕麦Ty1-copia类反转录转座子反转录酶序列的分离、鉴定与分析

Isolation, identification and characterization of reverse transcriptase sequence from Ty1-copia retrotransposon in Avena nuda

  • 摘要: 本研究根据Ty1-copia类反转录转座子反转录酶的保守区设计简并引物,通过PCR扩增,从裸燕麦(Avena nuda L.)品种‘品燕1号’基因组中分离获得23条Ty1-copia类反转录转座子序列,并对序列特征、系统发育关系及其转录活性进行分析。结果显示,23条Ty1-copia类反转录转座子存在较高的异质性,序列间的一致性为45%~98%,存在插入、移码和终止密码突变,但频率不高;系统发育分析结果表明,燕麦Ty1-copia类反转录转座子在进化过程中主要为垂直传递。本研究通过检索燕麦基因表达数据库,发现了5个有转录活性的Ty1-copia类反转录转座子。

     

    Abstract: Using degenerate oligonucleotide primers corresponding to the conserved domains of the Ty1-copia retrotransposon reverse transcriptase, 23 Ty1-copia retrotransposons reverse transcriptase sequences were isolated by polymerase chain reaction (PCR) from the genome of Avena nuda L., and characterization, phylogeny and transcriptional activities of these sequences were carried out. Results showed that the retrotransposons had high heterogeneity, with 45%-98% identity between sequences. The DNA sequences displayed mutations, including insertions, frameshifts, and stop codons, but the frequencies were not high. Phylogenetic analysis showed that the Ty1-copia retrotransposons of oats were mainly transmitted vertically during evolution. Five Ty1-copia retrotransposons with transcriptional activity were found by searching the oat gene expression database.

     

/

返回文章
返回