The C-terminus of ICln is Natively Disordered but Displays Local Structural Preformation

Autor:	Markus Paulmichl, Robert Konrat, Rosaria Gandini, Johannes Fürst, Georg Kontaxis, Andreas Schedlbauer
Rok vydání:	2011
Předmět:	Original Paper Rna processing Physiology Chemistry C-terminus Cell morphology Protein Structure Secondary Recombinant Proteins Protein Structure Tertiary Dogs Biochemistry Chloride Channels Biophysics Animals Nuclear Magnetic Resonance Biomolecular Protein secondary structure
Zdroj:	Cellular Physiology and Biochemistry. 28:1203-1210
ISSN:	1421-9778 1015-8987
DOI:	10.1159/000335852
Popis:	ICln is a vital, ubiquitously expressed protein with roles in cell volume regulation, angiogenesis, cell morphology, activation of platelets and RNA processing. In previous work we have determined the 3D structure of the N-terminus of ICln (residues 1-159), which folds into a PH-like domain followed by an unstructured region (residues H134 - Q159) containing protein-protein interaction sites. Here we present sequence-specific resonance assignments of the C-terminus (residues Q159 - H235) of ICln by NMR, and show that this region of the protein is intrinsically unstructured. By applying (13)Cα- (13)Cβ secondary chemical shifts to detect possible preferences for secondary structure elements we show that the C-terminus of ICln adopts a preferred α-helical organization between residues E170 and E187, and exists preferentially in extended conformations (β-strands) between residues D161 to Y168 and E217 to T223.
Databáze:	OpenAIRE
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