MX2 Viral Substrate Breadth and Inhibitory Activity Are Regulated by Protein Phosphorylation.
MX2 Viral Substrate Breadth and Inhibitory Activity Are Regulated by Protein Phosphorylation.
复制标题
DOI:
10.1128/mbio.01714-22
复制
发表时间:
2022-08-30
期刊:
影响因子:
6.4
通讯作者:
Malim, Michael H.
中科院分区:
文献类型:
--
作者:
Betancor, Gilberto;Bangham, Madeleine;Jeon, Jun Ki;Shah, Kanisha;Lynham, Steven;Jimenez-Guardeno, Jose M.;Malim, Michael H.
Human immunodeficiency virus type-1 (HIV-1) infection is potently inhibited by human myxovirus resistance 2 (MX2/MxB), which binds to the viral capsid and blocks the nuclear import of viral DNA. We have recently shown that phosphorylation is a key regulator of MX2 antiviral activity, with phosphorylation of serine residues at positions 14, 17, and 18 repressing MX2 function. Here, we extend the study of MX2 posttranslational modifications and identify serine and threonine phosphorylation in all domains of MX2. By substituting these residues with aspartic acid or alanine, hence mimicking the presence or absence of a phosphate group, respectively, we identified key positions that control MX2 antiviral activity. Aspartic acid substitutions of residues Ser306 or Thr334 and alanine substitutions of Thr343 yielded proteins with substantially reduced antiviral activity, whereas the presence of aspartic acid at positions Ser28, Thr151, or Thr343 resulted in enhanced activity: referred to as hypermorphic mutants. In some cases, these hypermorphic mutations, particularly when paired with other MX2 mutations (e.g., S28D/T151D or T151D/T343A) acquired the capacity to inhibit HIV-1 capsid mutants known to be insensitive to wild-type MX2, such as P90A or T210K, as well as MX2-resistant retroviruses such as equine infectious anemia virus (EIAV) and murine leukemia virus (MLV). This work highlights the complexity and importance of MX2 phosphorylation in the regulation of antiviral activity and in the selection of susceptible viral substrates.
登录
查看更多内容
影响因子:
5.4
作者:
Goujon C;Greenbury RA;Papaioannou S;Doyle T;Malim MH
通讯作者:
Malim MH
影响因子:
13.6
作者:
Alvarez FJD;He S;Perilla JR;Jang S;Schulten K;Engelman AN;Scheres SHW;Zhang P
通讯作者:
Zhang P
DOI:
10.1073/pnas.0403167101
发表时间:
2004-06-15
影响因子:
11.1
作者:
King, MC;Raposo, G;Lemmon, MA
通讯作者:
Lemmon, MA
影响因子:
30.3
作者:
Lee K;Ambrose Z;Martin TD;Oztop I;Mulky A;Julias JG;Vandegraaff N;Baumann JG;Wang R;Yuen W;Takemura T;Shelton K;Taniuchi I;Li Y;Sodroski J;Littman DR;Coffin JM;Hughes SH;Unutmaz D;Engelman A;KewalRamani VN
通讯作者:
KewalRamani VN
影响因子:
7.7
作者:
Kane M;Rebensburg SV;Takata MA;Zang TM;Yamashita M;Kvaratskhelia M;Bieniasz PD
通讯作者:
Bieniasz PD