The insulin superfamily of growth-promoting proteins

Details The insulin superfamily of growth-promoting proteins The insulin superfamily of growth-promoting proteins

2007-07-29

arxiv.org/abs/0707.4321v1

Biology

Quantitative Biology

Biomolecules

3 pages, 1 figure

Scientific paper

Recently, structural analysis of the human transferrin and growth hormone (GH) amino acid sequences has unravelled that they harbor a motif identical to a pattern found in viral oncoproteins known to bind the primarily nuclear tumor suppressor retinoblastoma protein (RB). Since related signatures had previously been identified also in insulin and the two insulin-like growth factors (IGFs), the aim of the current study has been to investigate whether further hints substantiating these reported homologies can be found in silico. Here, additional similarities are presented supporting the notion of an insulin superfamily of growth-promoting proteins with dual localization in the extracellular environment and the intracellular space, particularly in the nucleus, as well as characterized by a tropism for RB.

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