A disease- and phosphorylation-related nonmechanical function for keratin 8.
A disease- and phosphorylation-related nonmechanical function for keratin 8.
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DOI:
10.1083/jcb.200602146
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发表时间:
2006-07-03
期刊:
影响因子:
--
通讯作者:
Omary MB
中科院分区:
文献类型:
--
作者:
Ku NO;Omary MB
Keratin 8 (K8) variants predispose to human liver injury via poorly understood mechanisms. We generated transgenic mice that overexpress the human disease-associated K8 Gly61-to-Cys (G61C) variant and showed that G61C predisposes to liver injury and apoptosis and dramatically inhibits K8 phosphorylation at serine 73 (S73) via stress-activated kinases. This led us to generate mice that overexpress K8 S73-to-Ala (S73A), which mimicked the susceptibility of K8 G61C mice to injury, thereby providing a molecular link between K8 phosphorylation and disease-associated mutation. Upon apoptotic stimulation, G61C and S73A hepatocytes have persistent and increased nonkeratin proapoptotic substrate phosphorylation by stress-activated kinases, compared with wild-type hepatocytes, in association with an inability to phosphorylate K8 S73. Our findings provide the first direct link between patient-related human keratin variants and liver disease predisposition. The highly abundant cytoskeletal protein K8, and possibly other keratins with the conserved S73-containing phosphoepitope, can protect tissue from injury by serving as a phosphate “sponge” for stress-activated kinases and thereby provide a novel nonmechanical function for intermediate filament proteins.
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影响因子:
4
作者:
Hess, J;Angel, P;Schorpp-Kistner, M
通讯作者:
Schorpp-Kistner, M
影响因子:
4
作者:
LAI, YK;LEE, WC;CHEN, KD
通讯作者:
CHEN, KD
DOI:
10.1083/jcb.143.7.2023
发表时间:
1998-12-28
期刊:
The Journal of cell biology
影响因子:
--
作者:
Ku NO;Michie SA;Soetikno RM;Resurreccion EZ;Broome RL;Omary MB
通讯作者:
Omary MB
影响因子:
3.5
作者:
KRAUSS, S;FRANKE, WW
通讯作者:
FRANKE, WW
影响因子:
10.5
作者:
BARIBAULT, H;PENNER, J;WILSONHEINER, M
通讯作者:
WILSONHEINER, M