Characterization of a crucifer plant pre-rRNA processing complex.

Abstract:

:In cruciferous plants, the primary pre-rRNA cleavage site (P site) is immediately downstream of four similar, highly conserved sequences (A(1), A(2), A(3) and B) located within the 5'-ETS (5'-external transcribed spacer). In the present study, we describe the characterization of a plant NF D (nuclear factor D) that binds and interacts specifically with this A(123)BP cluster in the rDNA sequence. NF D is a high-molecular-mass complex containing nucleolin, fibrillarin and U3 and U14 snoRNAs. Furthermore, we show that NF D binds and cleaves pre-rRNA specifically at the P site. Thus we conclude that NF D is a pre-rRNA processing complex that may first assemble on rDNA and then bind nascent pre-rRNA.

journal_name

Biochem Soc Trans

authors

Sáez-Vasquez J,Caparros-Ruiz D,Barneche F,Echeverría M

doi

10.1042/BST0320578

keywords:

subject

Has Abstract

pub_date

2004-08-01 00:00:00

pages

578-80

issue

Pt 4

eissn

0300-5127

issn

1470-8752

pii

BST0320578

journal_volume

32

pub_type

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