TY - JOUR
T1 - TRIM8/GERP RING finger protein interacts with SOCS-1
AU - Toniato, Elena
AU - Peter Chen, X.
AU - Losman, Julie
AU - Flati, Vincenzo
AU - Donahue, Liz
AU - Rothman, Paul
PY - 2002/10/4
Y1 - 2002/10/4
N2 - Members of the suppressor of cytokine signaling (SOCS) family of signaling molecules regulate the activation of cytokine signaling. Experimental evidence indicates that SOCS expression is induced by cytokines and pro-inflammatory stimuli and is controlled at both the transcriptional and post-transcriptional levels. SOCS proteins are unstable and seem to be rapidly degraded by proteasomal pathways. However, the mechanisms by which SOCS protein levels are regulated remain unclear. Here, we show that TRIM8/GERP, a RING finger protein, interacts with SOCS-1 in vitro and in vivo. TRIM8/GERP, previously identified as a new member of the family of proteins containing a tripartite motif (TRIM), is a 551-amino acid RING finger protein conserved across species. TRIM8/GERP expression can be induced by interferon-γ in epithelial and lymphoid cells. Coexpression of TRIM8/GERP with SOCS-1 decreases SOCS-1 protein stability and levels. Functionally, expression of TRIM8/GERP decreases the repression of interferon-γ signaling mediated by SOCS-1. These data suggest that TRIM8/GERP may be a regulator of SOCS-1 function.
AB - Members of the suppressor of cytokine signaling (SOCS) family of signaling molecules regulate the activation of cytokine signaling. Experimental evidence indicates that SOCS expression is induced by cytokines and pro-inflammatory stimuli and is controlled at both the transcriptional and post-transcriptional levels. SOCS proteins are unstable and seem to be rapidly degraded by proteasomal pathways. However, the mechanisms by which SOCS protein levels are regulated remain unclear. Here, we show that TRIM8/GERP, a RING finger protein, interacts with SOCS-1 in vitro and in vivo. TRIM8/GERP, previously identified as a new member of the family of proteins containing a tripartite motif (TRIM), is a 551-amino acid RING finger protein conserved across species. TRIM8/GERP expression can be induced by interferon-γ in epithelial and lymphoid cells. Coexpression of TRIM8/GERP with SOCS-1 decreases SOCS-1 protein stability and levels. Functionally, expression of TRIM8/GERP decreases the repression of interferon-γ signaling mediated by SOCS-1. These data suggest that TRIM8/GERP may be a regulator of SOCS-1 function.
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U2 - 10.1074/jbc.M205900200
DO - 10.1074/jbc.M205900200
M3 - Article
C2 - 12163497
AN - SCOPUS:0037020175
SN - 0021-9258
VL - 277
SP - 37315
EP - 37322
JO - Journal of Biological Chemistry
JF - Journal of Biological Chemistry
IS - 40
ER -