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@ARTICLE{Williams:166793,
author = {Williams, Chris and van den Berg, Marlene and Stanley, Will
A. and Wilmanns, Matthias and Distel, Ben},
title = {{A} disulphide bond in the {E}2 enzyme {P}ex4p modulates
ubiquitin-conjugating activity},
journal = {Scientific reports},
volume = {3},
issn = {2045-2322},
address = {London},
publisher = {Nature Publishing Group},
reportid = {DESY-2014-01627},
pages = {2212},
year = {2013},
abstract = {The ubiquitin-conjugating enzyme Pex4p together with its
binding partner, the peroxisomal membrane protein Pex22p,
co-ordinates cysteine-dependent ubiquitination of the
cycling receptor protein Pex5p. Unusually for an
ubiquitin-conjugating enzyme, Saccharomyces cerevisiae Pex4p
can form a disulphide bond between the cysteine residues at
positions 105 and 146. We found that mutating the disulphide
forming cysteine residues in Pex4p to serines does not
disturb the secondary structure of the protein but does
reduce the in vitro activity of Pex4p. From the crystal
structure of Pex4p C105S, C146S in complex with the soluble
domain of Pex22p, we observe a narrowing of the active site
cleft, caused by loss of the disulphide bond. This
modification of the active site microenvironment is likely
to restrict access of ubiquitin to the active site cysteine,
modulating Pex4p activity. Finally, based on sequence and
structural alignments, we have identified other
ubiquitin-conjugating enzymes that may contain disulphide
bonds.},
cin = {EMBL},
ddc = {000},
cid = {I:(DE-H253)EMBL-20120731},
pnm = {DORIS Beamline K1.3 (POF2-54G13)},
pid = {G:(DE-H253)POF2-K1.3-20130405},
experiment = {EXP:(DE-H253)D-K1.3-20150101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000322433200001},
pubmed = {pmid:23896733},
doi = {10.1038/srep02212},
url = {https://bib-pubdb1.desy.de/record/166793},
}