JPH06113859A - Nib gene of mosaic virus of leaf spot of sweet potato - Google Patents

Nib gene of mosaic virus of leaf spot of sweet potato

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Publication number
JPH06113859A
JPH06113859A JP4289384A JP28938492A JPH06113859A JP H06113859 A JPH06113859 A JP H06113859A JP 4289384 A JP4289384 A JP 4289384A JP 28938492 A JP28938492 A JP 28938492A JP H06113859 A JPH06113859 A JP H06113859A
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JP
Japan
Prior art keywords
sweet potato
mosaic virus
gene
nib
virus
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP4289384A
Other languages
Japanese (ja)
Other versions
JP3103876B2 (en
Inventor
Masamichi Nishiguchi
正通 西口
Masaki Mori
昌樹 森
Junichi Sakai
淳一 酒井
Takaharu Hayashi
隆治 林
Tomio Usugi
富雄 宇杉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NORIN SUISANSYO KYUSHU NOGYO S
NORIN SUISANSYO KYUSHU NOGYO SHIKENJO
Original Assignee
NORIN SUISANSYO KYUSHU NOGYO S
NORIN SUISANSYO KYUSHU NOGYO SHIKENJO
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Priority to JP04289384A priority Critical patent/JP3103876B2/en
Publication of JPH06113859A publication Critical patent/JPH06113859A/en
Application granted granted Critical
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Abstract

PURPOSE:To obtain a gene encoding NIb protein among genes of leaf spot mosaic virus of sweet potato. CONSTITUTION:NIb gene of leaf spot mosaic virus of sweet potato, a gene encoding NIb protein having an amino acid sequence of the formula.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、サツマイモ斑紋モザイ
クウイルスの遺伝子のうち、NIbタンパク質遺伝子に
関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the NIb protein gene of sweet potato mottle mosaic virus genes.

【0002】[0002]

【従来の技術】従来、サツマイモにおいては、塊根部に
おける帯状粗皮病と称される疾病が発生し、問題となっ
ている。本病は、サツマイモ斑紋モザイクウイルス(S
PFMV)の一系統(強毒系統、S)の感染によって生
じることが明らかにされている。本ウイルスは、ウイル
ス分類上ジャガイモYウイルスと同じグループに属する
もので、紐状の形をとり、長さが850〜880ナノメ
ーターである。アブラムシにより非永続的に伝搬され、
ウイルスの構成成分は遺伝子の本体としてRNAとそれ
を取り囲む外被タンパク質(サブユニットが約2,20
0個)を含む。RNA遺伝子にはRNA合成に関与する
とされるタンパク質をコードする領域が含まれ、通常N
Ib(核封入体b)と呼ばれている。
2. Description of the Related Art Conventionally, in sweet potato, a disease called zonal scab in the tuberous root has occurred and has become a problem. This disease is caused by the sweet potato mottle mosaic virus (S
It has been clarified that it is caused by infection of one strain (PFMV) (strongly virulent strain, S). This virus belongs to the same group as the potato Y virus in terms of virus classification, has a string-like shape, and has a length of 850 to 880 nanometers. Non-persistently propagated by aphids,
The components of the virus are RNA, which is the main body of the gene, and the coat protein that surrounds it (subunit is approximately 2,20
0) is included. The RNA gene contains a region encoding a protein that is considered to be involved in RNA synthesis, and is usually N
It is called Ib (nuclear inclusion body b).

【0003】[0003]

【発明が解決しようとする課題】SPFMVゲノムRN
Aのこの領域に関する知見は少なく、その塩基配列も報
告されていない。そこで本発明者らは、サツマイモ斑紋
モザイクウイルスの機能・役割を解明するための手段と
して、本遺伝子のクローニングを計画した。そして、今
回本ウイルスのcDNAクローニングを行い、本タンパ
ク質をコードする領域の遺伝子構造を解明し、本発明を
完成した。
[Problems to be Solved by the Invention] SPFMV Genome RN
There is little knowledge about this region of A, and its base sequence has not been reported. Therefore, the present inventors planned cloning of this gene as a means for elucidating the function / role of sweet potato mottle mosaic virus. Then, this time, the cDNA of the virus was cloned to elucidate the gene structure of the region encoding the protein, thus completing the present invention.

【0004】[0004]

【課題を解決するための手段】その結果、本発明におい
ては、アミノ酸配列を有するNIbタンパク質をコード
する遺伝子を得た。
As a result, in the present invention, a gene encoding an NIb protein having an amino acid sequence was obtained.

【0005】[0005]

【作用】上記の手段によって、本発明のサツマイモ斑紋
モザイクウイルスのNIb遺伝子は、SPFMV抵抗性
植物を作出することが可能となる。
By the means described above, the NIb gene of the sweet potato mottle mosaic virus of the present invention makes it possible to produce SPFMV resistant plants.

【0006】[0006]

【実施例】以下、本発明の一実施例を具体的に説明す
る。本発明におけるSPFMVのRNAのコードするc
DNAのクローニングは、化1ないし化3に示す遺伝子
情報に基づいて適当なプローブを作成し、ウイルスRN
Aから得られるcDNAライブラリーから、あるいは逆
転写PCR法を用いてウィルスRNAから直接得ること
ができる。
EXAMPLE An example of the present invention will be specifically described below. C encoded by SPFMV RNA in the present invention
For cloning DNA, an appropriate probe is prepared based on the gene information shown in Chemical formula 1 to Chemical formula 3,
It can be obtained directly from the cDNA library obtained from A or from viral RNA using the reverse transcription PCR method.

【0007】また、化1ないし化3の情報を利用しない
場台、例えば本発明者らが用いた以下の方法に従い、あ
るいはこの方法を必要に応じて修飾した方法で行うこと
もできる。
It is also possible to carry out the method without using the information of Chemical formulas 1 to 3, for example, according to the following method used by the present inventors, or by modifying this method as necessary.

【0008】まず、普通系のSPFMV株(O株)感染
アサガオ葉からウイルス粒子を精製し、さらにそれから
RNAを抽出する。このRNAを鋳型にしてcDNAを
合成した。このcDNAファージミドベクターpBlu
escriptに組み込み、大腸菌を形質転換すること
によりcDNAライブラリーを得た。形質転換した大腸
菌を個別に培養し、プラスミドを抽出、インサートの有
無を調べることにより、約0.8Kbpのインサートを
もつcDNAクローンを得た。これをプローブとしてコ
ロニーハイブリダイゼーションを行った結果、最大約
2.3Kbpのインサー−卜を含むクローンが得られ
た。
First, virus particles are purified from morning glory leaves infected with a normal SPFMV strain (O strain), and RNA is extracted therefrom. CDNA was synthesized using this RNA as a template. This cDNA phagemid vector pBlue
A cDNA library was obtained by incorporating it into escript and transforming E. coli. The transformed E. coli was individually cultured, the plasmid was extracted, and the presence or absence of the insert was examined to obtain a cDNA clone having an insert of about 0.8 Kbp. As a result of colony hybridization using this as a probe, a clone containing an inserter of about 2.3 Kbp at maximum was obtained.

【0009】さらに上記インサートがSPFMV−Sの
RNAとハイブリダイズすることを確認した後、このc
DNAをプローブにして、同様に作成したSPFMV−
SのcDNAライブラリーから最長約3.5Kbpのイ
ンサートを含むクローンが得られ、その塩基配列を決定
した。その結果、化1ないし化3に示すようなNIbタ
ンパク質の遺伝子の塩基配列が明らかになった。
Further, after confirming that the above-mentioned insert hybridizes with SPFMV-S RNA, this c
SPFMV- prepared in the same manner using DNA as a probe
A clone containing an insert of up to about 3.5 Kbp was obtained from the S cDNA library, and its nucleotide sequence was determined. As a result, the nucleotide sequences of the NIb protein genes shown in Chemical formulas 1 to 3 were clarified.

【0010】この塩基配列から明らかとなったNIbタ
ンパク質のアミノ酸配列と、タバコエッチウイルス(T
EV)(Allisonら、1986)、夕バコベイン
モットリングウイルス(TVMV)(Domierら、
1986)、PVY(Robagliaら、1989)
およびプラムポックスウイルス(PPV)(Teych
eneyら、1989)由来の同クンパク質のアミノ酸
配列と比較した。
The amino acid sequence of the NIb protein revealed from this nucleotide sequence and the tobacco etch virus (T
EV) (Allison et al., 1986), Yu Bacobein Mottling virus (TVMV) (Domier et al.,
1986), PVY (Robaglia et al., 1989).
And plumpox virus (PPV) (Teych
The amino acid sequence of the same protein from eney et al., 1989) was compared.

【0011】PPVとの間のホモロジーが最も高く約6
8%、そのほかのウイルス(TEV、TVMV、PV
Y)では60〜61%であった。
The highest homology with PPV is about 6
8%, other viruses (TEV, TVMV, PV
In Y), it was 60 to 61%.

【0012】以下に本発明の実施例をさらに詳細に説明
する。操作の手順は特に記述しない限りマニアチスらの
記載(MoreculaerCloning:A La
boratory Manual)[ゴ−ルド・スプリ
ング・ハーバー ・ラボラトリー、1982]に従っ
た。
Examples of the present invention will be described in more detail below. The procedure of operation is described by Maniatis et al. (Molecular Cloning: A La) unless otherwise stated.
Beverage Manual [Gold Spring Harbor Laboratory, 1982].

【0013】[実験例l] SPFMVのNIb遺伝子
のcDNAクロ−ニング (1)SPFMV−RNAの調製 材料はSPFMV−Oおよび−S株に感染したアサガオ
を用いた。接種約2週間後のアサガオをUsugiら
(1991)の方法を用いてウイルス粒了を精製した。
さらにウイルス粒子からMoyerおよびCali(1
985)の方法を一部修正してRNAを抽出した。ウイ
ルス溶液(0.3〜0.4mg/ml)に等量のRNA
拙出液(0.2M 炭酸アンモニウム,pH9.2%S
DS、2mM EDTAおよび0.05%プロテナーゼ
K)を加え、約20分間室温で振とうした。ついでフェ
ノール処理を約10分行い、低速遠心分離により水層部
分を得た。
[Experimental Example 1] cDNA cloning of the NIb gene of SPFMV (1) Preparation of SPFMV-RNA The materials used were morning glory infected with SPFMV-O and -S strains. About 2 weeks after the inoculation, morning glory was purified by using the method of Usugi et al. (1991).
Furthermore, from virus particles, Moyer and Cali (1
RNA was extracted by partially modifying the method of 985). Equal amount of RNA in virus solution (0.3-0.4 mg / ml)
Liquid (0.2M ammonium carbonate, pH 9.2% S
DS, 2 mM EDTA and 0.05% proteinase K) were added and shaken for about 20 minutes at room temperature. Next, phenol treatment was performed for about 10 minutes, and low-speed centrifugation was performed to obtain a water layer portion.

【0014】この操作を2回繰り返し、エーテル処埋を
2回行った後、水層に対し1/10量の3M酢酸ナトリ
ウムを加え、さらに2.5倍量のエタノールを加えるこ
とによりRNAを沈殿化させた。遠心分離によりエタノ
ールを取り除いたあと、トリス・FDTA緩衝液に溶か
した。
After repeating this operation twice and carrying out ether treatment twice, RNA was precipitated by adding 1/10 amount of 3M sodium acetate to the aqueous layer and further adding 2.5 times amount of ethanol. Made into After removing ethanol by centrifugation, it was dissolved in Tris-FDTA buffer.

【0015】 (2)cDNAライブラリーの作成とスクリーニング はじめにポティウイルスRNAは3′末端にポリA配列
をもつので、オリゴdTをプライマーとする二本鎖cD
NAを合成した。さらにcDNAの両末端を平滑にした
あと、EcoRIおよびNotIの切断部位をもつリン
カーを結合した。この一連の過程は市販のcDNA合成
キット(ファルマシア社製)を利用し、キッ卜の説明書
の通りに処理した。リンカーを両末端に持つcDNAを
ファージミドベクターpBluescript(Str
ategene社製)のEcoRIサイトに挿入した。
この反応はライゲーションキット(TAKARA社製)
を用い、キッ卜の説明書に示された方法によった。この
反応産物を大腸菌、JMl09またはHB101へHa
nahan(1986)の方法により形質転換した。
(2) Preparation and screening of cDNA library First, since potyvirus RNA has a poly A sequence at the 3'end, double-stranded cD using oligo dT as a primer
NA was synthesized. After blunting both ends of the cDNA, linkers having EcoRI and NotI cleavage sites were ligated. In this series of processes, a commercially available cDNA synthesis kit (Pharmacia) was used and processed according to the instructions of the kit. A cDNA having a linker at both ends is used as a phagemid vector pBluescript (Str
Eatgene's EcoRI site.
This reaction is a ligation kit (manufactured by TAKARA)
Was used according to the method indicated in the instruction manual of the kit. The reaction product was transformed into E. coli, JM109 or HB101 with Ha.
Transformation was carried out by the method of nahan (1986).

【0016】このようにして得られたSPFMV−Oの
cDNAライブラリーよりプラスミドを少量迅速調製
し、インサートをもつクローン(約0.8KbpのcD
NA)を得た。このcDNAをプローブとして放射性[
32P]で標識し、コロニーハイブリダイゼーションを行
なった結果、最大約2.3 KbpのcDNAクローン
を得た。さらに本cDNAがSPFMXV−SのRNA
とハイブリダイズすることを確認した後に、本cDNA
をプローブとしてSPFMV−SのcDNAライブラリ
ーをスクリ−ニングし、最大約3.5KbpのcDNA
クローンを得た。
A small amount of a plasmid was rapidly prepared from the SPFMV-O cDNA library thus obtained, and a clone having an insert (cD of about 0.8 Kbp was prepared.
NA) was obtained. Using this cDNA as a probe
As a result of colony hybridization after labeling with [ 32 P], a cDNA clone with a maximum of about 2.3 Kbp was obtained. Further, this cDNA is RNA of SPFMXV-S.
After confirming that it hybridizes with
The SPFMV-S cDNA library was screened using
I got a clone.

【0017】このcDNAを、常法に従いダイデオキシ
法により塩基配列を決定したところ、一つの大きな読み
取り枠が見い出され、その一部がTEV,PPV,TV
MV,PVYのゲノムRNAで見い出されているNIb
のタンバク質をコードしている領域であることを明らか
にした。
When the nucleotide sequence of this cDNA was determined by the dideoxy method according to the conventional method, one large open reading frame was found, and a part of it was TEV, PPV, TV.
NIb found in MV and PVY genomic RNA
It was revealed that it is a region encoding the protein of.

【0018】[0018]

【発明の効果】以上説明したように本発明のサツマイモ
斑紋モザイクウイルスのNIb遺伝子によれば、サツマ
イモ斑紋モザイクウイルスとは分類学上異なるグループ
のウィルスである,タバコモザイクウィルス(TMV)
(Golemboskiら、1990)、キュウリモザ
イクウイルス(CMV)(Andersonら、199
2)、ピーアーリ一ブラウニングウイルス(PEBV)
(MackFalaneand Davies,199
2)のもつRNA合成関与遺伝子の完全長あるいは一部
の遺伝子を植物へ導入することによりウイルス抵抗性を
示すことが報告されており、遺伝子組換え技術を用い
て、本遺伝子を植物へ組み込み、SPFMV抵抗性植物
を作出することが可能である。
INDUSTRIAL APPLICABILITY As described above, according to the NIb gene of sweet potato mottle mosaic virus of the present invention, tobacco mosaic virus (TMV), which is a group of viruses taxonomically different from sweet potato mottle mosaic virus
(Golemboski et al., 1990), cucumber mosaic virus (CMV) (Anderson et al., 199).
2), Pearly Browning Virus (PEBV)
(MackFalane and Davies, 199
It has been reported that virus resistance is exhibited by introducing a full-length or a part of the genes involved in RNA synthesis in 2) into plants, and this gene is incorporated into plants by gene recombination technology. It is possible to create SPFMV resistant plants.

フロントページの続き (72)発明者 林 隆治 茨城県つくば市東新井11−4 (72)発明者 宇杉 富雄 沖縄県石垣市字登城911熱研宿舎13Front Page Continuation (72) Inventor Ryuji Hayashi 11-4 Higashiarai, Tsukuba City, Ibaraki Prefecture (72) Inventor Tomio Usugi 911 Thermal Research Camp, Ishigaki City, Okinawa Prefecture 13

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 【化1】 【化2】 【化3】 化1〜化3に示すアミノ酸配列を有するNIbタンパク
質をコードする遺伝子であることを特徴とするサツマイ
モ斑紋モザイクウイルスのNIb遺伝子。
Claims: [Chemical 2] [Chemical 3] A NIb gene of sweet potato mottle mosaic virus, which is a gene encoding an NIb protein having the amino acid sequences shown in Chemical formulas 1 to 3.
JP04289384A 1992-10-01 1992-10-01 Nucleotide sequence of NIb gene of sweet potato mottled mosaic virus virulent strain (SPFMV-S) and method for producing same plant Expired - Lifetime JP3103876B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP04289384A JP3103876B2 (en) 1992-10-01 1992-10-01 Nucleotide sequence of NIb gene of sweet potato mottled mosaic virus virulent strain (SPFMV-S) and method for producing same plant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP04289384A JP3103876B2 (en) 1992-10-01 1992-10-01 Nucleotide sequence of NIb gene of sweet potato mottled mosaic virus virulent strain (SPFMV-S) and method for producing same plant

Publications (2)

Publication Number Publication Date
JPH06113859A true JPH06113859A (en) 1994-04-26
JP3103876B2 JP3103876B2 (en) 2000-10-30

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Country Link
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Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PHYTOPATHOLOGY=1992 *

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