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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Involvement of a eukaryotic-like ubiquitin-related modifier in the proteasome pathway of the archaeon Sulfolobus acidocaldarius
AU - Anjum, Rana S.
AU - Bray, Sian M.
AU - Blackwood, John K.
AU - Kilkenny, Mairi L.
AU - Coelho, Matthew A.
AU - Foster, Benjamin M.
AU - Li, Shurong
AU - Howard, Julie A.
AU - Pellegrini, Luca
AU - Albers, Sonja-Verena
AU - Deery, Michael J.
AU - Robinson, Nicholas P.
PY - 2015/9/8
Y1 - 2015/9/8
N2 - In eukaryotes, the covalent attachment of ubiquitin chains directs substrates to the proteasome for degradation. Recently, ubiquitin-like modifications have also been described in the archaeal domain of life. It has subsequently been hypothesized that ubiquitin-like proteasomal degradation might also operate in these microbes, since all archaeal species utilize homologues of the eukaryotic proteasome. Here we perform a structural and biochemical analysis of a ubiquitin-like modification pathway in the archaeon Sulfolobus acidocaldarius. We reveal that this modifier is homologous to the eukaryotic ubiquitin-related modifier Urm1, considered to be a close evolutionary relative of the progenitor of all ubiquitin-like proteins. Furthermore we demonstrate that urmylated substrates are recognized and processed by the archaeal proteasome, by virtue of a direct interaction with the modifier. Thus, the regulation of protein stability by Urm1 and the proteasome in archaea is likely representative of an ancient pathway from which eukaryotic ubiquitin-mediated proteolysis has evolved.
AB - In eukaryotes, the covalent attachment of ubiquitin chains directs substrates to the proteasome for degradation. Recently, ubiquitin-like modifications have also been described in the archaeal domain of life. It has subsequently been hypothesized that ubiquitin-like proteasomal degradation might also operate in these microbes, since all archaeal species utilize homologues of the eukaryotic proteasome. Here we perform a structural and biochemical analysis of a ubiquitin-like modification pathway in the archaeon Sulfolobus acidocaldarius. We reveal that this modifier is homologous to the eukaryotic ubiquitin-related modifier Urm1, considered to be a close evolutionary relative of the progenitor of all ubiquitin-like proteins. Furthermore we demonstrate that urmylated substrates are recognized and processed by the archaeal proteasome, by virtue of a direct interaction with the modifier. Thus, the regulation of protein stability by Urm1 and the proteasome in archaea is likely representative of an ancient pathway from which eukaryotic ubiquitin-mediated proteolysis has evolved.
KW - Archaeal Proteins
KW - Chromatography, Gel
KW - Chromatography, Liquid
KW - Circular Dichroism
KW - Crystallography, X-Ray
KW - Mass Spectrometry
KW - Microscopy, Electron
KW - Proteasome Endopeptidase Complex
KW - Proteolysis
KW - Sulfolobus acidocaldarius
KW - Ubiquitins
KW - Journal Article
KW - Research Support, Non-U.S. Gov't
U2 - 10.1038/ncomms9163
DO - 10.1038/ncomms9163
M3 - Journal article
C2 - 26348592
VL - 6
JO - Nature Communications
JF - Nature Communications
SN - 2041-1723
M1 - 8163
ER -