Biochemical characterization of a new maize (Zea mays L.) peptide growth factor.

Abstract:

:Coordination of cell growth and cell division is very important for living organisms in order for these to develop harmonically. The present research is concerned with the purification and characterization of a new peptide hormone, namely ZmIGF (Zea mays insulin-like growth factor), which regulates growth and cell division in maize tissues. ZmIGF is a peptide of 5.7 kDa, as determined by mass spectroscopy. It was isolated either from maize embryonic axes of 48-h germinated seeds or from embryogenic callus and purified through several chromatographic procedures to obtain a single peak as shown by Reverse Phase High-Performance Liquid Chromatography (RP-HPLC). This peptide exhibits a well defined α-helix structure by circular dichroism analysis, similar to that reported for Insulin or for Insulin-like growth factor (IGF-1). Further, ZmIGF seems to perform, in maize, a similar function to that reported for insulin or peptides from the IGF family in animals. Indeed, maize tissues stimulated either by ZmIGF or insulin showed to induce selective synthesis of ribosomal proteins as well as of DNA. Taken together, the previously mentioned data strongly suggest that plants contain a peptide hormone of the IGF family, highly conserved through evolution that regulates growth and development.

journal_name

Protein Pept Lett

authors

Rodríguez-López CD,Rodríguez-Romero A,Aguilar R,de Jiménez ES

doi

10.2174/092986611794328636

subject

Has Abstract

pub_date

2011-01-01 00:00:00

pages

84-91

issue

1

eissn

0929-8665

issn

1875-5305

pii

BSP/ PPL/ E pub/0229

journal_volume

18

pub_type

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