6533b85efe1ef96bd12c078c
RESEARCH PRODUCT
Single-chain antibodies against a plant viral RNA-dependent RNA polymerase confer virus resistance.
Peter D. NagyDanuta GaletzkaKajohn BoonrodGabi KrczalUdo Conradsubject
virusesHepatitis C virusAmino Acid MotifsBiomedical EngineeringNicotiana benthamianaBioengineeringmedicine.disease_causeAntibodies ViralVirus ReplicationApplied Microbiology and BiotechnologyVirusPlant VirusesTombusviruschemistry.chemical_compoundRNA polymerasePlant virusTobaccomedicinePlant DiseasesGeneticsbiologyfungifood and beveragesbiology.organism_classificationPlants Genetically ModifiedRNA-Dependent RNA PolymeraseVirologyTombusviridaechemistryViral replicationMolecular MedicineSingle-Chain AntibodiesBiotechnologydescription
Crop loss due to viral diseases is still a major problem for agriculture today. We present a strategy to achieve virus resistance based on the expression of single-chain Fv fragments (scFvs) against a conserved domain in a plant viral RNA-dependent RNA polymerase (RdRp), a key enzyme in virus replication. The selected scFvs inhibited complementary RNA synthesis of different plant virus RdRps in vitro and virus replication in planta. Moreover, the scFvs also bound to the RdRp of the distantly related hepatitis C virus. T(1) and T(2) progeny of transgenic lines of Nicotiana benthamiana expressing different scFvs either in the cytosol or in the endoplasmic reticulum showed varying degrees of resistance against four plant viruses from different genera, three of which belong to the Tombusviridae family. Virus resistance based on antibodies to RdRps adds another tool to the repertoire for combating plant viruses.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2004-04-13 | Nature biotechnology |