Inverted repeats, stem-loops, and cruciforms: significance for initiation of DNA replication.

Abstract:

:Inverted repeats occur nonrandomly in the DNA of most organisms. Stem-loops and cruciforms can form from inverted repeats. Such structures have been detected in pro- and eukaryotes. They may affect the supercoiling degree of the DNA, the positioning of nucleosomes, the formation of other secondary structures of DNA, or directly interact with proteins. Inverted repeats, stem-loops, and cruciforms are present at the replication origins of phage, plasmids, mitochondria, eukaryotic viruses, and mammalian cells. Experiments with anti-cruciform antibodies suggest that formation and stabilization of cruciforms at particular mammalian origins may be associated with initiation of DNA replication. Many proteins have been shown to interact with cruciforms, recognizing features like DNA crossovers, four-way junctions, and curved/bent DNA of specific angles. A human cruciform binding protein (CBP) displays a novel type of interaction with cruciforms and may be linked to initiation of DNA replication.

journal_name

J Cell Biochem

authors

Pearson CE,Zorbas H,Price GB,Zannis-Hadjopoulos M

doi

10.1002/(SICI)1097-4644(199610)63:1%3C1::AID-JCB1%

subject

Has Abstract

pub_date

1996-10-01 00:00:00

pages

1-22

issue

1

eissn

0730-2312

issn

1097-4644

pii

10.1002/(SICI)1097-4644(199610)63:1<1::AID-JCB1>3.

journal_volume

63

pub_type

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