NDLI: Testifying the rice bacterial blight resistance gene xa5 by genetic complementation and further analyzing xa5 (Xa5) in comparison with its homolog TFIIAγ1

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Testifying the rice bacterial blight resistance gene xa5 by genetic complementation and further analyzing xa5 (Xa5) in comparison with its homolog TFIIAγ1

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Testifying the rice bacterial blight resistance gene xa5 by genetic complementation and further analyzing xa5 (Xa5) in comparison with its homolog TFIIAγ1

Content Provider	Springer Nature Link
Author	Jiang, Guang Huai Xia, Zhi Hui Zhou, Yong Li Wan, Jia Li, Da Yong Chen, Run Sheng Zhai, Wen Xue Zhu, Li Huang
Copyright Year	2006
Abstract	The recessive gene xa5 for resistance to bacterial blight resistance of rice is located on chromosome 5, and evidence based on genetic recombination has been shown to encode a small subunit of the basal transcription factor IIA (Iyer and McCouch in MPMI 17(12):1348–1354, 2004). However, xa5 has not been demonstrated by a complementation test. In this study, we introduced the dominant allele Xa5 into a homozygous xa5-line, which was developed from a cross between IRBB5 (an indica variety with xa5) and Nipponbare (a japonica variety with Xa5). Transformation of Xa5 and subsequent segregation analysis confirmed that xa5 is a V39E substitution variant of the gene for TFIIAγ on chromosome 5 (TFIIAγ5 or Xa5). The rice has an addition gene for TFIIAγ exists on chromosome 1 (TFIIAγ1). Analysis of the expression patterns of Xa5 (TFIIAγ5)/xa5 and TFIIAγ1 revealed that both the genes are constitutively expressed in different rice organs. However, no expression of TFIIAγ1 could be detected in the panicle by reverse transcriptase-polymerase chain reaction. To compare the structural difference between the Xa5/xa5 and TFIIAγ1 proteins, 3-D structures were predicted using computer-aided modeling techniques. The modeled structures of Xa5 (xa5) and TFIIAγ1 fit well with the structure of TFIIA small subunit from human, suggesting that they may all act as a small subunit of TFIIA. The E39V substitution in the xa5 protein occurs in the α-helix domain, a supposed conservative substitutable site, which should not affect the basal transcription function of TFIIAγ. The structural analysis indicates that xa5 and Xa5 potentially retain their basic transcription factor function, which, in turn, may mediate the novel pathway for bacterial blight resistance and susceptibility, respectively.
Starting Page	354
Ending Page	366
Page Count	13
File Format	PDF
ISSN	16174615
Journal	Molecular and General Genetics MGG
Volume Number	275
Issue Number	4
e-ISSN	16174623
Language	English
Publisher	Springer-Verlag
Publisher Date	2006-01-28
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Bacterial blight resistance Recessive resistance gene Basal transcription factor IIA Gene duplication rice (Oryza sativa L.) Animal Genetics and Genomics Plant Genetics & Genomics Microbial Genetics and Genomics Biochemistry Cell Biology
Content Type	Text
Resource Type	Article
Subject	Genetics Medicine Molecular Biology

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Testifying the rice bacterial blight resistance gene xa5 by genetic complementation and further analyzing xa5 (Xa5) in comparison with its homolog TFIIAγ1

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IN SILICO ANALYSIS OF CONTIGS AROUND RECESSIVE RESISTANCE GENE xa5 AND MARKER ASSISTED SELECTION OF BACTERIAL BLIGHT RESISTANCE IN RICE (Oryza sativa L.)

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