A Bemisia tabaci midgut protein interacts with begomoviruses and plays a role in virus transmission.
Begomoviruses are a major group of plant viruses, transmitted exclusively by Bemisia tabaci (Gennadius) in a persistent circulative non-propagative manner. The information regarding molecular and cellular basis underlying Begomovirus - whitefly interaction is very scarce. Evidences have suggested that the insect gut possesses some crucial protein receptors that allow specific entry of virus into the insect haemolymph. We have performed yeast two hybrid gut cDNA expression library screening against coat protein of Tomato leaf curl New Delhi virus (ToLCV) and Cotton leaf curl Rajasthan virus (CLCuV) as bait. Midgut protein (MGP) was the common protein found interacting with both ToLCV and CLCuV. MGP was localized in whole mount B. tabaci as well as in dissected guts through confocal microscopy. Pull down and dot blot assays confirmed in vitro interaction between ToLCV/CLCuV coat protein and MGP. Immunolocalization analysis also showed colocalization of ToLCV/CLCuV particles and MGP within insect's gut. Finally, anti-MGP antibody fed B. tabaci, exhibited 70% reduction in ToLCV transmission, suggesting a supportive role for MGP in virus transmission.
Department of Zoology, University of Delhi, Delhi, 110007, India.
Vipin Singh
VS
Rana
Department of Zoology, University of Delhi, Delhi, 110007, India.
Sonam
S
Popli
Department of Zoology, University of Delhi, Delhi, 110007, India.
Gunjan Kumar
GK
Saurav
Department of Zoology, University of Delhi, Delhi, 110007, India.
Harpreet Singh
HS
Raina
Division of Entomology, Indian Agricultural Research Institute, New Delhi, 110012, India.
Rahul
R
Chaubey
Division of Entomology, Indian Agricultural Research Institute, New Delhi, 110012, India.
V V
VV
Ramamurthy
Department of Zoology, University of Delhi, Delhi, 110007, India.
R
R
Rajagopal
D000818:Animals; D053839:Begomovirus / Q000378:metabolism* / Q000472:pathogenicity; D004064:Digestive System / Q000821:virology; D006430:Hemiptera / Q000378:metabolism / Q000821:virology; D006458:Hemolymph / Q000378:metabolism / Q000821:virology; D007194:India; D019476:Insect Proteins / Q000096:biosynthesis* / Q000378:metabolism; D007303:Insect Vectors / Q000378:metabolism / Q000821:virology; D010935:Plant Diseases / Q000235:genetics / Q000821:virology*; D013559:Symbiosis / Q000235:genetics*; D053586:Virus Internalization
D019476:Insect Proteins
B. tabaci; Begomovirus; receptor