コロナウイルス
English Journal
- PCR amplification of the hrcV gene through specific primers for detecting Pseudomonas syringae pathovars.
- Vaseghi A, Bakhshinejad B, Safaie N, Parchin RA, Sadeghizadeh M.Author information Department of Genetics, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran.AbstractPseudomonas syringae pathovars are important pathogens among phytopathogenic bacteria causing a variety of diseases in plants. These pathogens can rapidly disseminate in a large area leading to infection and destruction of plants. To prevent the incidence of the bacteria, appropriate detection methods should be employed. Routinely serological tests, being time-consuming and costly, are exploited to detect these pathogens in plants, soil, water and other resources. Over the recent years, DNA-based detection approaches which are stable, rapid, specific and reliable have been developed and sequence analysis of various genes are widely utilized to identify different strains of P. syringe. However, the greatest limitation of these genes is inability to detect numerous pathovars of P. syringae. Herein, by using bioinformatic analysis, we found the hrcV gene located at pathogenicity islands of bacterial genome with the potential of being used as a new marker for phylogenetic detection of numerous pathovars of P. syringae. Following design of specific primers to hrcV, we amplified a 440 bp fragment. Of 13 assayed pathovars, 11 were detected. Also, through experimental procedures and bioinformatic analysis it was revealed that the designed primers have the capacity to detect 19 pathovars. Our findings suggest that hrcV could be used as a gene with the merit of detecting more pathovars of P. syringae in comparison with other genes used frequently for detection purposes.
- World journal of microbiology & biotechnology.World J Microbiol Biotechnol.2014 Feb;30(2):413-21. doi: 10.1007/s11274-013-1438-6. Epub 2013 Aug 11.
- Pseudomonas syringae pathovars are important pathogens among phytopathogenic bacteria causing a variety of diseases in plants. These pathogens can rapidly disseminate in a large area leading to infection and destruction of plants. To prevent the incidence of the bacteria, appropriate detection metho
- PMID 23933804
- The inner membrane protein HrcV from Xanthomonas spp. is involved in substrate docking during type III secretion.
- Hartmann N, Büttner D.AbstractPathogenicity of the gram-negative plant-pathogenic bacterium Xanthomonas campestris pv. vesicatoria depends on a membrane-spanning type III secretion (T3S) system, which translocates effector proteins into eukaryotic host cells. In this study, we characterized the T3S system component HrcV, which is a member of the YscV/FlhA family of inner membrane proteins. HrcV consists of eight transmembrane helices and a cytoplasmic region (HrcVC). Mutant and protein-protein interaction studies showed that HrcVC is essential for protein function and binds to T3S substrates, including the early substrate HrpB2, the pilus protein HrpE, and effector proteins. Furthermore, HrcVC interacts with itself and with components and control proteins of the T3S apparatus. The interaction of HrcVC with HrpB2, HrpE, and T3S system components depends on amino acid residues in a conserved motif, designated flagella/hypersensitive response/invasion proteins export pore (FHIPEP), which is located in a cytoplasmic loop between transmembrane helix four and five of HrcV. Mutations in the FHIPEP motif abolish HrcV function but do not affect the interaction of HrcVC with effector proteins.
- Molecular plant-microbe interactions : MPMI.Mol Plant Microbe Interact.2013 Oct;26(10):1176-89. doi: 10.1094/MPMI-01-13-0019-R.
- Pathogenicity of the gram-negative plant-pathogenic bacterium Xanthomonas campestris pv. vesicatoria depends on a membrane-spanning type III secretion (T3S) system, which translocates effector proteins into eukaryotic host cells. In this study, we characterized the T3S system component HrcV, which i
- PMID 23777429
- Identification of HrpX regulon genes in Xanthomonas oryzae pv. oryzicola using a GFP visualization technique.
- Li Y, Xiao Y, Zou L, Zou H, Chen G.Author information Department of Agriculture and Biology, Shanghai Jiao Tong University, China.AbstractXanthomonas oryzae pv. oryzicola is the causal agent of bacterial leaf streak in rice and injects repertoires of T3S effectors (T3SEs), which are normally regulated by a global regulator HrpX, into plant cells to suppress plant innate immunity for disease development. To establish a visualization technique to identify HrpX regulon genes in this pathogen, we chose six known or unknown T3SE genes of X. oryzae pv. oryzicola (strain RS105) as the targets in this report. The promoters of these candidates, whether or not containing a PIP-box, were fused with the gfp (green fluorescent protein) reporter gene, and the gfp reporters were introduced into the wild-type RS105 and the hrpX mutant RΔhrpX. GFP expression in the wild-type strain could be observed under fluorescence microscopy, but fluorescence was not observed in the hrpX mutant. Consequently, transcription and secretion detection demonstrated that these HrpX regulon members were repressed when hrpX was mutated and were not secreted into the hrp-inducing medium XOM3 because of a mutation in hrcV (T3SS deficient). These data suggest that the gfp reporter system is a feasible visualization tool for the identification of HrpX regulon genes and discovery of new T3SEs in the X. oryzae pv. oryzicola-rice pathosystem.
- Archives of microbiology.Arch Microbiol.2012 Apr;194(4):281-91. doi: 10.1007/s00203-011-0758-x. Epub 2011 Oct 11.
- Xanthomonas oryzae pv. oryzicola is the causal agent of bacterial leaf streak in rice and injects repertoires of T3S effectors (T3SEs), which are normally regulated by a global regulator HrpX, into plant cells to suppress plant innate immunity for disease development. To establish a visualization te
- PMID 21987378
Japanese Journal
- 小児呼吸器感染症のウイルス学的サーベイランス:III. ヒト呼吸器コロナウイルス
- 松本 一郎,川名 林治
- 感染症学雑誌 66(3), 319-326, 1992
- … 小児急性呼吸器感染症の病原ウイルス学的サーベイランスにおいて, 5株のヒト呼吸器コロナウイルス (HRCV) が, L132細胞で, 分離された. …
- NAID 130004329926
Related Links
- The latest Tweets from *MA$UCAMBA* (@hrcv__). uprh842 Twitter Search query Search Twitter Saved searches Remove Verified account @ Suggested users Verified account @ Verified account @ Language: English Norsk ...
- Connect with artists such as hrcv. Join pixiv to comment, rate work, and interact with members. Remember me Forgot ID or password? Secure sign-in through SSL (https) Register for a free pixiv account with your email! Sign Up ...
Related Pictures
★リンクテーブル★
[★]
- 英
- coronavirus
- 同
- ヒト呼吸器コロナウイルス, human respiratory coronavirus, HRCV
- 関
- SARSコロナウイルス、ウイルス、SARS-CoV-2
- ニドウイルス目 Nidovirales コロナウイルス科 Coronaviridae コロナウイルス属に所属するウイルスである。
- コロナウイルスは直径80-160nmのエンベロープに包まれたウイルス(粒子)である。
- ウイルス粒子の表面には12-24nmのスパイク(ペプロマー peplomer)の突起を有しており、これが太陽のコロナに似ることからコロナウイルスと命名されている。
- ゲノムは一本鎖のプラス鎖であり、5'末端にcap構造、3'末端にpoly A構造を有している。
- ゲノムRNAの大きさは、6~9x10^6 Daであり、20-30kbの大きさを有する。
- ゲノムRNAはカプシドと結合してらせん対称のヌクレオカプシドをなしており、エンベロープ下に配置されている。
- ウイルス粒子の密度は1.15~1.18g/cm3程度である。
- ゲノムRNAはウイルスRNAポリメラーゼにより感染細胞中でマイナス鎖RNAに転写され、それを鋳型に3'末端が揃った複数のmRNAが合成される。
- 脂質二重膜上にはスパイク(S)、膜(M)などの蛋白質が存在する。種よっては血球凝集素・エステラーゼ(hemagglutinin-erastase, HE)も存在する(OC43株など)。
- S蛋白とHE蛋白が中和に関する主な抗原決定基となりうる
- ヒトには鼻かぜを起こし、その他の動物にも感染しうる;マウス(マウス肝炎ウイルス, mouse hepatitis virus, MHV)、ラット、イヌ、ウシ、鳥類(ニワトリ伝染性気管支炎ウイルス, avian infectious bronchitis virus, AIV)。
- ヒト呼吸器コロナウイルス human respiratory coronavirus HRCVには229E株とOC43株が代表的なものである。OC43株は赤血球凝固能を有する。
- ヒトに風邪症状を引きおこすウイルスは、αコロナウイルスの22E株、NL63株、βコロナウイルスのOC43株、HKU1株であり、これら4種類が風邪の原因の10-15%を占める(流行期35%)。
- コロナウイルスには4種の血清型を有しており、αコロナウイルス(I群)には229E株・NL63株・ブタ伝染性胃腸炎ウイルス、βコロナウイルス(II群)にはOC32株・HKU1株・・マウス肝炎ウイルス、γコロナウイルス(III群)にはニワトリ伝染性気管支炎ウイルス、δコロナウイルス(IV群)には七面鳥コロナウイルスが属する。
- 2002年11月に中国で始まり、2003年に世界に広まったsevere acute respiratory syndrome SARSの原因ウイルスであるSARSコロナウイルスは遺伝的にこれまでのいずれのコロナウイルスとも抗原性が異なる。現在ではβコロナウイルスに属するとされている。
- 2012年中東で流行したMERSコロナウイルスはもβコロナウイルス属に所属する。
- 致死率はいずれも高くSARSコロナウイルス感染症は10%、MERSコロナウイルス感染症は30%とされる。
- 2019年末から2020年初頭に中国で始まり世界に広まった新型コロナウイルス感染症(COVID-19)の原因ウイルス SARS-CoV-2はβコロナウイルスに属する。
コロナウイルス感染症の特徴
[★]