Functional significance of eIF5A and its hypusine modification in eukaryotes.
Functional significance of eIF5A and its hypusine modification in eukaryotes.
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DOI:
10.1007/s00726-009-0408-7
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发表时间:
2010-02
期刊:
影响因子:
3.5
通讯作者:
Valentini, S. R.
中科院分区:
文献类型:
--
作者:
Park, M. H.;Nishimura, K.;Zanelli, C. F.;Valentini, S. R.
关键词:
The unusual basic amino acid, hypusine [Nε-(4-amino-2-hydroxybutyl)-lysine], is a modified lysine with the addition of the 4-aminobutyl moiety from the polyamine spermidine. This naturally occurring amino acid is a product of a unique posttranslational modification that occurs in only one cellular protein, eukaryotic translation initiation factor 5A (eIF5A, eIF-5A). Hypusine is synthesized exclusively in this protein by two sequential enzymatic steps involving deoxyhypusine synthase (DHS) and deoxyhypusine hydroxylase (DOHH). The deoxyhypusine/hypusine synthetic pathway has evolved in archaea and eukaryotes, and eIF5A, DHS and DOHH are highly conserved suggesting a vital cellular function of eIF5A. Gene disruption and mutation studies in yeast and higher eukaryotes have provided valuable information on the essential nature of eIF5A and the deoxyhypusine/hypusine modification in cell growth and in protein synthesis. In view of the extraordinary specificity and functional significance of hypusine-containing eIF5A in mammalian cell proliferation, eIF5A and the hypusine biosynthetic enzymes are novel potential targets for intervention in aberrant cell proliferation.
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作者:
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通讯作者:
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作者:
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DOI:
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发表时间:
2003-11-01
期刊:
EUROPEAN JOURNAL OF BIOCHEMISTRY
影响因子:
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作者:
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通讯作者:
Johansson, HE
DOI:
10.1016/j.bbrc.2009.01.148
发表时间:
2009-03-20
影响因子:
3.1
作者:
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通讯作者:
Zanelli, Cleslei F.