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1gvn

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{{STRUCTURE_1gvn| PDB=1gvn | SCENE= }}
{{STRUCTURE_1gvn| PDB=1gvn | SCENE= }}
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'''CRYSTAL STRUCTURE OF THE PLASMID MAINTENANCE SYSTEM EPSILON/ZETA: MEACHNISM OF TOXIN INACTIVATION AND TOXIN FUNCTION'''
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===CRYSTAL STRUCTURE OF THE PLASMID MAINTENANCE SYSTEM EPSILON/ZETA: MEACHNISM OF TOXIN INACTIVATION AND TOXIN FUNCTION===
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==Overview==
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Programmed cell death in prokaryotes is frequently found as postsegregational killing. It relies on antitoxin/toxin systems that secure stable inheritance of low and medium copy number plasmids during cell division and kill cells that have lost the plasmid. The broad-host-range, low-copy-number plasmid pSM19035 from Streptococcus pyogenes carries the genes encoding the antitoxin/toxin system epsilon/zeta and antibiotic resistance proteins, among others. The crystal structure of the biologically nontoxic epsilon(2)zeta(2) protein complex at a 1.95-A resolution and site-directed mutagenesis showed that free zeta acts as phosphotransferase by using ATPGTP. In epsilon(2)zeta(2), the toxin zeta is inactivated because the N-terminal helix of the antitoxin epsilon blocks the ATPGTP-binding site. To our knowledge, this is the first prokaryotic postsegregational killing system that has been entirely structurally characterized.
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(as it appears on PubMed at http://www.pubmed.gov), where 12571357 is the PubMed ID number.
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{{ABSTRACT_PUBMED_12571357}}
==About this Structure==
==About this Structure==
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[[Category: Plasmid]]
[[Category: Plasmid]]
[[Category: Postsegregational killing system]]
[[Category: Postsegregational killing system]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 18:04:00 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 1 06:09:34 2008''

Revision as of 03:09, 1 July 2008

Image:1gvn.png

Template:STRUCTURE 1gvn

CRYSTAL STRUCTURE OF THE PLASMID MAINTENANCE SYSTEM EPSILON/ZETA: MEACHNISM OF TOXIN INACTIVATION AND TOXIN FUNCTION

Template:ABSTRACT PUBMED 12571357

About this Structure

1GVN is a Protein complex structure of sequences from Streptococcus pyogenes. Full crystallographic information is available from OCA.

Reference

Crystal structure of the plasmid maintenance system epsilon/zeta: functional mechanism of toxin zeta and inactivation by epsilon 2 zeta 2 complex formation., Meinhart A, Alonso JC, Strater N, Saenger W, Proc Natl Acad Sci U S A. 2003 Feb 18;100(4):1661-6. Epub 2003 Feb 5. PMID:12571357

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