NDLI: SUMO-1 modification of the major immediate-early (IE) 1 and 2 proteins of human cytomegalovirus is regulated by different mechanisms and modulates the intracellular localization of the IE1, but not IE2, protein

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SUMO-1 modification of the major immediate-early (IE) 1 and 2 proteins of human cytomegalovirus is regulated by different mechanisms and modulates the intracellular localization of the IE1, but not IE2, protein

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SUMO-1 modification of the major immediate-early (IE) 1 and 2 proteins of human cytomegalovirus is regulated by different mechanisms and modulates the intracellular localization of the IE1, but not IE2, protein

Content Provider	Springer Nature Link
Author	Sadanari, H. Yamada, R. Ohnishi, K. Matsubara, K. Tanaka, J.
Copyright Year	2005
Abstract	We have previously shown that two proteins with apparent molecular masses of 91- and 102-kDa (p91 and p102, respectively) in human cytomegalovirus (HCMV)-infected cells are antigenically and structurally related to the major immediate-early (IE) 1 and 2 proteins (IE1p68 and IE2p80, respectively) of HCMV, respectively. In this study, we extended the characterization of p91 and p102 and our results were as follows; (i) Lysine at amino acid position 450 in IE1p68 and at amino acid position 175 or 180 in IE2p80, to which SUMO-1 has been shown to be covalently linked, are required for production of p91 and p102, respectively. (ii) A reversal of cycloheximide (CH) block in the presence of actinomycin D imposed at the time of infection inhibited production of p91, but not p102. (iii) The steady-state levels of p91, but not p102, were remarkably decreased by treatment with proteasome inhibitor MG132, but coincubation with CH inhibited this decrease of p91. (iv) Cell fractionation by differential detergent extraction demonstrated that p91 is preferentially found in detergent-insoluble fraction, although p102 as well as IE1p68 and IE2p80 distributes into all fractions. These results demonstrate that p91 and p102 correspond to SUMO-1-modified IE1p68 and IE2p80, respectively, that the production and degradation of SUMO-1-modified IE1p68 is regulated by mechanisms different from those of SUMO-1-modified IE2p80, and that SUMO-1 modification modulates the intracellular localization of IE1p68, but not IE2p80.
Starting Page	1763
Ending Page	1782
Page Count	20
File Format	PDF
ISSN	03048608
Journal	Archives of Virology
Volume Number	150
Issue Number	9
e-ISSN	14328798
Language	English
Publisher	Springer-Verlag
Publisher Date	2005-06-03
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Medical Microbiology Infectious Diseases Virology
Content Type	Text
Resource Type	Article
Subject	Virology Medicine

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SUMO-1 modification of the major immediate-early (IE) 1 and 2 proteins of human cytomegalovirus is regulated by different mechanisms and modulates the intracellular localization of the IE1, but not IE2, protein

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The chromatin-tethering domain of human cytomegalovirus immediate-early (IE) 1 mediates associations of IE1, PML and STAT2 with mitotic chromosomes, but is not essential for viral replication.

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SUMO-1 modification of the major immediate-early (IE) 1 and 2 proteins of human cytomegalovirus is regulated by different mechanisms and modulates the intracellular localization of the IE1, but not IE2, protein