TY  - JOUR
AU  - Leliveld, S. R.
AU  - Hendriks, P.
AU  - Michel, M.
AU  - Sajnani, G.
AU  - Bader, V.
AU  - Trossbach, S.
AU  - Prikulis, I.
AU  - Hartmann, R.
AU  - Jonas, E.
AU  - Willbold, D.
AU  - Requena, J. R.
AU  - Korth, C.
TI  - Oligomer assembly of the C-terminal DISC1 domain (640-854) is controlled by self-association motifs and disease-associated polymorphism S704C
JO  - Biochemistry
VL  - 48
SN  - 0006-2960
CY  - Columbus, Ohio
PB  - American Chemical Society
M1  - PreJuSER-6507
SP  - 7746 - 7755
PY  - 2009
N1  - Funded by a research grant (LE 2197/1-1) to S.R.L. from the German Research Foundation (DFG) and Stanley Medical Research Institute, Baltimore, MD, to C.K.
AB  - Genetic studies have established a role of disrupted-in-schizophrenia-1 (DISC1) in chronic mental diseases (CMD). Limited experimental data are available on the domain structure of the DISC1 protein although multiple interaction partners are known including a self-association domain within the middle part of DISC1 (residues 403-504). The DISC1 C-terminal domain is deleted in the original Scottish pedigree where DISC1 harbors two coiled-coil domains and disease-associated polymorphisms at 607 and 704, as well as the important nuclear distribution element-like 1 (NDEL1) binding site at residues 802-839. Here, we performed mutagenesis studies of the C-terminal domain of the DISC1 protein (residues 640-854) and analyzed the expressed constructs by biochemical and biophysical methods. We identified novel DISC1 self-association motifs and the necessity of their concerted action for orderly assembly: the region 765-854 comprising a coiled-coil domain is a dimerization domain and the region 668-747 an oligomerization domain; dimerization was found to be a prerequisite for orderly assembly of oligomers. Consistent with this, disease-associated polymorphism C704 displayed a slightly higher oligomerization propensity. The heterogeneity of DISC1 multimers in vitro was confirmed with a monoclonal antibody binding exclusively to HMW multimers. We also identified C-terminal DISC1 fragments in human brains, suggesting that C-terminal fragments could carry out DISC1-dependent functions. When the DISC1 C-terminal domain was transiently expressed in cells, it assembled into a range of soluble and insoluble multimers with distinct fractions selectively binding NDEL1, indicating functionality. Our results suggest that assembly of the C-terminal domain is controlled by distinct domains including the disease-associated polymorphism 704 and is functional in vivo.
KW  - Animals
KW  - Antibodies, Monoclonal: metabolism
KW  - Humans
KW  - Mice
KW  - Nerve Tissue Proteins: chemistry
KW  - Nerve Tissue Proteins: genetics
KW  - Nerve Tissue Proteins: metabolism
KW  - Polymorphism, Genetic
KW  - Protein Multimerization
KW  - Protein Structure, Quaternary
KW  - Protein Structure, Tertiary
KW  - Antibodies, Monoclonal (NLM Chemicals)
KW  - DISC1 protein, human (NLM Chemicals)
KW  - Nerve Tissue Proteins (NLM Chemicals)
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
C6  - pmid:19583211
UR  - <Go to ISI:>//WOS:000268720300021
DO  - DOI:10.1021/bi900901e
UR  - https://juser.fz-juelich.de/record/6507
ER  -