Crystal structure of the RIM1alpha C2B domain at 1.7 A resolution. 2007

Rong Guan, and Han Dai, and Diana R Tomchick, and Irina Dulubova, and Mischa Machius, and Thomas C Südhof, and Josep Rizo
Department of Biochemistry, University of Texas Southwestern Medical Center, 6000 Harry Hines Boulevard, Dallas, Texas 75390, USA.

RIM proteins play critical roles in synaptic vesicle priming and diverse forms of presynaptic plasticity. The C-terminal C2B domain is the only module that is common to all RIMs but is only distantly related to well-studied C2 domains, and its three-dimensional structure and interactions have not been characterized in detail. Using NMR spectroscopy, we now show that N- and C-terminal extensions beyond the predicted C2B domain core sequence are necessary to form a folded, stable RIM1alpha C2B domain. We also find that the isolated RIM1alpha C2B domain is not sufficient for previously described protein-protein interactions involving the RIM1alpha C-terminus, suggesting that additional sequences adjacent to the C2B domain might be required for these interactions. However, analytical ultracentrifugation shows that the RIM1alpha C2B domain forms weak dimers in solution. The crystal structure of the RIM1alpha C2B domain dimer at 1.7 A resolution reveals that it forms a beta-sandwich characteristic of C2 domains and that the unique N- and C-terminal extensions form a small subdomain that packs against the beta-sandwich and mediates dimerization. Our results provide a structural basis to understand the function of RIM C2B domains and suggest that dimerization may be a crucial aspect of RIM function.

UI MeSH Term Description Entries
D008958 Models, Molecular Models used experimentally or theoretically to study molecular shape, electronic properties, or interactions; includes analogous molecules, computer-generated graphics, and mechanical structures. Molecular Models,Model, Molecular,Molecular Model
D008969 Molecular Sequence Data Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories. Sequence Data, Molecular,Molecular Sequencing Data,Data, Molecular Sequence,Data, Molecular Sequencing,Sequencing Data, Molecular
D010446 Peptide Fragments Partial proteins formed by partial hydrolysis of complete proteins or generated through PROTEIN ENGINEERING techniques. Peptide Fragment,Fragment, Peptide,Fragments, Peptide
D010743 Phospholipids Lipids containing one or more phosphate groups, particularly those derived from either glycerol (phosphoglycerides see GLYCEROPHOSPHOLIPIDS) or sphingosine (SPHINGOLIPIDS). They are polar lipids that are of great importance for the structure and function of cell membranes and are the most abundant of membrane lipids, although not stored in large amounts in the system. Phosphatides,Phospholipid
D011485 Protein Binding The process in which substances, either endogenous or exogenous, bind to proteins, peptides, enzymes, protein precursors, or allied compounds. Specific protein-binding measures are often used as assays in diagnostic assessments. Plasma Protein Binding Capacity,Binding, Protein
D011487 Protein Conformation The characteristic 3-dimensional shape of a protein, including the secondary, supersecondary (motifs), tertiary (domains) and quaternary structure of the peptide chain. PROTEIN STRUCTURE, QUATERNARY describes the conformation assumed by multimeric proteins (aggregates of more than one polypeptide chain). Conformation, Protein,Conformations, Protein,Protein Conformations
D011994 Recombinant Proteins Proteins prepared by recombinant DNA technology. Biosynthetic Protein,Biosynthetic Proteins,DNA Recombinant Proteins,Recombinant Protein,Proteins, Biosynthetic,Proteins, Recombinant DNA,DNA Proteins, Recombinant,Protein, Biosynthetic,Protein, Recombinant,Proteins, DNA Recombinant,Proteins, Recombinant,Recombinant DNA Proteins,Recombinant Proteins, DNA
D002118 Calcium A basic element found in nearly all tissues. It is a member of the alkaline earth family of metals with the atomic symbol Ca, atomic number 20, and atomic weight 40. Calcium is the most abundant mineral in the body and combines with phosphorus to form calcium phosphate in the bones and teeth. It is essential for the normal functioning of nerves and muscles and plays a role in blood coagulation (as factor IV) and in many enzymatic processes. Coagulation Factor IV,Factor IV,Blood Coagulation Factor IV,Calcium-40,Calcium 40,Factor IV, Coagulation
D000595 Amino Acid Sequence The order of amino acids as they occur in a polypeptide chain. This is referred to as the primary structure of proteins. It is of fundamental importance in determining PROTEIN CONFORMATION. Protein Structure, Primary,Amino Acid Sequences,Sequence, Amino Acid,Sequences, Amino Acid,Primary Protein Structure,Primary Protein Structures,Protein Structures, Primary,Structure, Primary Protein,Structures, Primary Protein
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia

Related Publications

Rong Guan, and Han Dai, and Diana R Tomchick, and Irina Dulubova, and Mischa Machius, and Thomas C Südhof, and Josep Rizo
October 1997, Journal of molecular biology,
Rong Guan, and Han Dai, and Diana R Tomchick, and Irina Dulubova, and Mischa Machius, and Thomas C Südhof, and Josep Rizo
October 1998, Protein science : a publication of the Protein Society,
Rong Guan, and Han Dai, and Diana R Tomchick, and Irina Dulubova, and Mischa Machius, and Thomas C Südhof, and Josep Rizo
September 1991, Journal of molecular biology,
Rong Guan, and Han Dai, and Diana R Tomchick, and Irina Dulubova, and Mischa Machius, and Thomas C Südhof, and Josep Rizo
January 1991, Proteins,
Rong Guan, and Han Dai, and Diana R Tomchick, and Irina Dulubova, and Mischa Machius, and Thomas C Südhof, and Josep Rizo
December 1994, Structure (London, England : 1993),
Rong Guan, and Han Dai, and Diana R Tomchick, and Irina Dulubova, and Mischa Machius, and Thomas C Südhof, and Josep Rizo
August 1991, The Journal of biological chemistry,
Rong Guan, and Han Dai, and Diana R Tomchick, and Irina Dulubova, and Mischa Machius, and Thomas C Südhof, and Josep Rizo
April 1988, Journal of molecular biology,
Rong Guan, and Han Dai, and Diana R Tomchick, and Irina Dulubova, and Mischa Machius, and Thomas C Südhof, and Josep Rizo
October 1994, The Journal of biological chemistry,
Rong Guan, and Han Dai, and Diana R Tomchick, and Irina Dulubova, and Mischa Machius, and Thomas C Südhof, and Josep Rizo
June 1998, General physiology and biophysics,
Rong Guan, and Han Dai, and Diana R Tomchick, and Irina Dulubova, and Mischa Machius, and Thomas C Südhof, and Josep Rizo
November 1997, Cell,
Copied contents to your clipboard!