TY - JOUR
T1 - A herpesvirus maturational proteinase, assemblin
T2 - Identification of its gene, putative active site domain, and cleavage site
AU - Welch, Anthony R.
AU - Woods, Amina S.
AU - Mcnally, Lisa M.
AU - Cotter, Robert J.
AU - Gibson, Wade
PY - 1991
Y1 - 1991
N2 - A herpesvirus proteinase activity has been identified and partially characterized by using the cloned enzyme and substrate genes in transient transfection assays. Evidence is presented that the proteinase gene of cytomegalo-virus strain Colburn encodes a 590-amino acid protein whose N-terminal 249 residues contain the proteolytic activity and two domains that are highly conserved in the homologous protein of other herpesviruses. Insertion of a short amino acid sequence between these domains abolished proteinase activity, suggesting that this region constitutes part or all of the enzyme active site. Plasma desorption mass spectrometry was used to identify the C terminus of the mature assembly protein as alanine, enabling the recognition of a consensus proteinase cleavage sequence of V/L-X-A ↓ S/V, near the C-terminal end of all herpesvirus assembly protein homologs. Interestingly, the proteinase and its substrate, the assembly protein precursor, are encoded by opposite halves of the same open reading frame.
AB - A herpesvirus proteinase activity has been identified and partially characterized by using the cloned enzyme and substrate genes in transient transfection assays. Evidence is presented that the proteinase gene of cytomegalo-virus strain Colburn encodes a 590-amino acid protein whose N-terminal 249 residues contain the proteolytic activity and two domains that are highly conserved in the homologous protein of other herpesviruses. Insertion of a short amino acid sequence between these domains abolished proteinase activity, suggesting that this region constitutes part or all of the enzyme active site. Plasma desorption mass spectrometry was used to identify the C terminus of the mature assembly protein as alanine, enabling the recognition of a consensus proteinase cleavage sequence of V/L-X-A ↓ S/V, near the C-terminal end of all herpesvirus assembly protein homologs. Interestingly, the proteinase and its substrate, the assembly protein precursor, are encoded by opposite halves of the same open reading frame.
UR - http://www.scopus.com/inward/record.url?scp=0025721850&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0025721850&partnerID=8YFLogxK
U2 - 10.1073/pnas.88.23.10792
DO - 10.1073/pnas.88.23.10792
M3 - Article
C2 - 1961747
AN - SCOPUS:0025721850
SN - 0027-8424
VL - 88
SP - 10792
EP - 10796
JO - Proceedings of the National Academy of Sciences of the United States of America
JF - Proceedings of the National Academy of Sciences of the United States of America
IS - 23
ER -