RESUMO
A putative chrysovirus recovered from Brassica campestris var. purpurea and provisionally named "Brassica campestris chrysovirus 1" (BrcCV1) was sequenced. The genome of the putative BrcCV1 consists of three double-stranded RNAs (dsRNAs) comprising 3,639 (dsRNA 1), 3,567 (dsRNA 2) and 3,337 (dsRNA 3) base pairs, respectively, each containing a single open reading frame (ORF 1-3). The putative proteins encoded by ORF 1-3 show homologies to RdRp, CP and chryso-P3 of approved or tentative chrysoviruses. In addition, the three dsRNAs of BrcCV1 contain highly conserved 5' and 3' untranslated regions (UTRs) in a way similar to known chrysoviruses. In a phylogenetic tree based on the conserved amino acid sequences of the RdRps of chrysoviruses, totiviruses and partitiviruses, the putative BrcCV1 formed a separate clade with Raphanus sativus chrysovirus 1 (RasCV1), a putative trisegmented, plant-infecting chrysovirus, in the family Chrysoviridae.
Assuntos
Brassica/virologia , Genoma Viral , Doenças das Plantas/virologia , Vírus de RNA/genética , Vírus de RNA/isolamento & purificação , Regiões 3' não Traduzidas , Sequência de Bases , Fases de Leitura Aberta , Filogenia , Vírus de RNA/classificação , Vírus de RNA/fisiologia , RNA Viral/genética , Proteínas Virais/genéticaRESUMO
A double-stranded RNA (dsRNA) HBJZ1506 recovered from the phytopathogenic fungus Erysiphe cichoracearum infecting Calendula officinalis in Jingzhou, Hubei Province, China, was sequenced. HBJZ1506 comprises 11,908 nucleotides (nt) and contains a 11,859-nt-long open reading frame (ORF) coding for a polypeptide that is 61 % identical to that of a putative endornavirus named grapevine endophyte endornavirus (GeEV). The putative polyprotein has an RNA-dependent RNA polymerase (RdRp) domain and an RNA helicase domain, which show homology to and have an arrangement that is similar to that of their counterparts in approved or putative endornaviruses. In a phylogenetic tree constructed using amino acid sequences of the RdRp region of HBJZ1506 and selected endornaviruses, HBJZ1506 clustered with endornaviruses and formed a well-supported monophyletic branch with GeEV. These results suggest that HBJZ1506 might represent a novel endornavirus, for which the name Erysiphe cichoracearum endornavirus (EcEV) is proposed.
Assuntos
Ascomicetos/virologia , Genoma Viral , Vírus de RNA/genética , RNA de Cadeia Dupla/genética , Sequência de Bases , China , Genômica , Dados de Sequência Molecular , Fases de Leitura Aberta , Filogenia , Vírus de RNA/classificação , Vírus de RNA/isolamento & purificação , RNA Viral/genética , Proteínas Virais/genéticaRESUMO
A double-stranded RNA (dsRNA), PN-S, isolated from Panax notoginseng was sequenced and characterized. dsRNA PN-S was determined to be 5003 base pairs (bp) in length and to have a genome organization similar to that of totiviruses. The two deduced proteins encoded by dsRNA PN-S have the highest amino acid (aa) sequence identity to CP and RNA-dependent RNA polymerase (RdRp) of black raspberry virus F (BrVF), a tentative member of the genus Totivirus, family Totiviridae, at 39% and 54%, respectively. In a phylogenetic tree based on an alignment of the RdRp amino acid sequences of dsRNA PN-S and selected totiviruses, dsRNA PN-S formed a monophyletic clade with dsRNA viruses belonging to the genus Totivirus. These data suggest that dsRNA PN-S may represent the genome of a member of a novel species of the genus Totivirus, family Totiviridae, for which we propose the name Panax notoginseng virus A (PnVA).
Assuntos
Genoma Viral , Panax notoginseng/virologia , RNA Viral/genética , Análise de Sequência de DNA , Totiviridae/classificação , Totiviridae/isolamento & purificação , Proteínas do Capsídeo/genética , Análise por Conglomerados , Ordem dos Genes , Dados de Sequência Molecular , Fases de Leitura Aberta , Filogenia , RNA Polimerase Dependente de RNA/genética , Homologia de Sequência , Totiviridae/genéticaRESUMO
To evaluate and compare the clinical effect of camphophenic (CP) and iodoform used as intracanal medication in root canal therapy for periapical periodontitis, 305 teeth suffering from periapical periodontitis in 245 subjects were divided into two groups. The experimental group of 163 teeth was treated with CP and iodoform, while the control group of 142 teeth was treated with CP alone. The clinical effect after 10 days was observed. The result showed that the response rate in the teeth treated with CP and iodoform was 92.64%, significantly higher than that in the teeth treated with CP alone (79.58%), P<0.01.