TY  - JOUR
AU  - Kukuk, Laura
AU  - Dingley, Andrew J.
AU  - Granzin, Joachim
AU  - Nagel-Steger, Luitgard
AU  - Thiagarajan-Rosenkranz, Pallavi
AU  - Ciupka, Daniel
AU  - Hänel, Karen
AU  - Batra-Safferling, Renu
AU  - Pacheco, Victor
AU  - Stoldt, Matthias
AU  - Pfeffer, Klaus
AU  - Beer-Hammer, Sandra
AU  - Willbold, Dieter
AU  - Koenig, Bernd W.
TI  - Structure of the SLy1 SAM homodimer reveals a new interface for SAM domain self-association
JO  - Scientific reports
VL  - 9
IS  - 1
SN  - 2045-2322
CY  - [London]
PB  - Macmillan Publishers Limited, part of Springer Nature
M1  - FZJ-2019-00874
SP  - 54
PY  - 2019
AB  - Sterile alpha motif (SAM) domains are protein interaction modules that are involved in a diverse range of biological functions such as transcriptional and translational regulation, cellular signalling, and regulation of developmental processes. SH3 domain-containing protein expressed in lymphocytes 1 (SLy1) is involved in immune regulation and contains a SAM domain of unknown function. In this report, the structure of the SLy1 SAM domain was solved and revealed that this SAM domain forms a symmetric homodimer through a novel interface. The interface consists primarily of the two long C-terminal helices, α5 and α5′, of the domains packing against each other. The dimerization is characterized by a dissociation constant in the lower micromolar range. A SLy1 SAM domain construct with an extended N-terminus containing five additional amino acids of the SLy1 sequence further increases the stability of the homodimer, making the SLy1 SAM dimer two orders of magnitude more stable than previously studied SAM homodimers, suggesting that the SLy1 SAM dimerization is of functional significance. The SLy1 SAM homodimer contains an exposed mid-loop surface on each monomer, which may provide a scaffold for mediating interactions with other SAM domain-containing proteins via a typical mid-loop–end-helix interface.
LB  - PUB:(DE-HGF)16
C6  - pmid:30631134
UR  - <Go to ISI:>//WOS:000455352400037
DO  - DOI:10.1038/s41598-018-37185-3
UR  - https://juser.fz-juelich.de/record/860088
ER  -