Protein interactions among the vaccinia virus late transcription factors.
The viral proteins A1L, A2L, G8R, and H5R positively modulate vaccinia virus late gene expression. Host-encoded proteins hnRNP A2 and RBM3 may also interact with these viral factors to influence late gene expression. In these studies, a yeast two-hybrid screen and in vitro pulldown and crosslinking experiments were used to investigate protein--protein interactions among these factors. These studies confirmed a previous observation that G8R interacts with itself and A1L. However, self-interactions of A1L and H5R, and interactions between A2L and G8R, A2L and H5R, and H5R and G8R were also observed. In addition, the proteins hnRNP A2 and RBM3 both showed some interaction with A2L. Illustration of these interactions is a step toward understanding the architecture of the late gene transcription complex as it occurs in poxviruses.
Dellis
Stephanie
S
Biology Department, College of Charleston, Charleston, SC 29401, USA.
Strickland
Kyle C
KC
McCrary
William J
WJ
Patel
Ashwin
A
Stocum
Eileen
E
Wright
Cynthia F
CF
D000818:Animals; D004268:DNA-Binding Proteins / Q000378:metabolism; D015870:Gene Expression; D034481:Heterogeneous-Nuclear Ribonucleoprotein Group A-B / Q000378:metabolism; D006801:Humans; D011485:Protein Binding; D016601:RNA-Binding Proteins / Q000378:metabolism; D015534:Trans-Activators / Q000378:metabolism; D014157:Transcription Factors / Q000378:metabolism*; D014616:Vaccinia virus / Q000235:genetics / Q000378:metabolism*; D014764:Viral Proteins / Q000378:metabolism
C081259:A1L protein, Vaccinia virus; C081260:A2L protein, Vaccinia virus; D004268:DNA-Binding Proteins; C091945:H5R protein, Vaccinia virus; D034481:Heterogeneous-Nuclear Ribonucleoprotein Group A-B; C099506:RBM3 protein, human; D016601:RNA-Binding Proteins; D015534:Trans-Activators; D014157:Transcription Factors; D014764:Viral Proteins; C439768:hnRNP A2