title: Molecular cloning, encoding sequence, and expression of vaccinia virus nucleic acid-dependent nucleoside triphosphatase gene.
abstract: A rabbit poxvirus genomic library contained within the expression vector lambda gt11 was screened with polyclonal antiserum prepared against vaccinia virus nucleic acid-dependent nucleoside triphosphatase (NTPase)-I enzyme. Five positive phage clones containing from 0.72- to 2.5-kilobase-pair (kbp) inserts expressed a beta-galactosidase fusion protein that was reactive by immunoblotting with the NTPase-I antibody. Hybridization analysis allowed the location of this gene within the vaccinia HindIIID restriction fragment. From the known nucleotide sequence of the 16-kbp vaccinia HindIIID fragment, we identified a region that contains a 1896-base open reading frame coding for a 631-amino acid protein. Analysis of the complete sequence revealed a highly basic protein, with hydrophilic COOH and NH2 termini, various hydrophobic domains, and no significant homology to other known proteins. Translational studies demonstrate that NTPase-I belongs to a late class of viral genes. This protein is highly conserved among Orthopoxviruses.
mesh_terms: D000255:Adenosine Triphosphate / Q000378:metabolism; D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D002874:Chromosome Mapping; D003001:Cloning, Molecular; D004279:DNA, Viral / Q000235:genetics; D005786:Gene Expression Regulation; D005814:Genes, Viral; D043583:Nucleoside-Triphosphatase; D010744:Phosphoric Monoester Hydrolases / Q000235:genetics* / Q000276:immunology; D011817:Rabbits; D012995:Solubility; D014616:Vaccinia virus / Q000235:genetics*
chemical_list: D004279:DNA, Viral; D000255:Adenosine Triphosphate; D010744:Phosphoric Monoester Hydrolases; D043583:Nucleoside-Triphosphatase