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Eur J Biochem. 1994 Nov 1;225(3):1203-10.

Relationships between molecular interactions (nucleotides, lipids and proteins) and structural features of the bovine brain 21-kDa protein.

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1
Laboratoire des proteines, CNRS URA 1188, Université René Descartes Paris 5, France.

Abstract

A cytosolic 21-kDa protein isolated from bovine brain was demonstrated to bind hydrophobic ligands, particularly phosphatidylethanolamine. It was encountered in several tissues and species; however, its accurate function remained partially unknown. In order to obtain information from its structural features, we built a molecular model which revealed it to possess a nucleotide-binding site. In the present research, we describe the affinity of the bovine brain 21-kDa protein for nucleotides, and its association with cytosolic proteins, small GTP-binding proteins and lipid droplets. Our results suggest that, through its association with small GTP-binding proteins, the 21-kDa protein is implicated in signal mechanisms during cell growth and maturation.

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