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Identification of structural domains affecting transactivation potential of Nm23.

Abstract：

:The strong transactivation activity of the C-terminal half (amino acids 76-152) of Nm23 was reported previously. Here we examined a structural domain preventing or necessary to its transactivation activity. The C-terminal 1/4 (amino acids 109-152) was sufficient for transactivation, but the C-terminal half with a longer N-terminal extension (amino acids 58-152) caused the loss of the transactivation ability. Furthermore, coexpression of the N-terminal half with the C-terminus of Nm23-H1 blocked the transactivation activity of the C-terminal half, where direct interaction of both truncated proteins was demonstrated in vitro. Transactivation activities in the C-terminal halves of the known mutants (P96S, H118F, S120G, and S120A) exhibiting differential antimetastasis effects were also tested. Significant reduction of transactivation activity was observed only in H118F, indicating that NPD kinase active-site histidine is required. This suggests that transactivation potential of Nm23 is related to NDP kinase activity but not to metastasis suppressor activity.

journal_name

Biochem Biophys Res Commun

journal_title

Biochemical and biophysical research communications

authors

Cho SJ,Lee NS,Jung YS,Lee H,Lee KJ,Kim E,Chae SK

doi

10.1006/bbrc.2001.6042

subject

Has Abstract

pub_date

2001-12-07 00:00:00

pages

738-43

issue

3

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(01)96042-5

journal_volume

289

pub_type

杂志文章

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