1gvn

From Proteopedia

(Difference between revisions)

Revision as of 06:41, 24 July 2019

Crystal Structure of the Plasmid Maintenance System epsilon/zeta: Meachnism of toxin inactivation and toxin function

Structural highlights

1gvn is a 4 chain structure with sequence from Streptococcus pyogenes. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[EATX_STRPY] Antitoxin component of a toxin-antitoxin (TA) module. Neutralizes the toxic effect of cognate zeta toxin. Part of a postsegregational killing (PSK) system involved in the killing of plasmid-free cells. Continuous synthesis of the epsilon antitoxin is required to counteract the zeta toxin.[REFERENCE:7] [ZTOX_STRPY] Toxic component of a toxin-antitoxin (TA) module. Phosphorylates UDP-N-acetyl-D-glucosamine (UNAG) on the 3'-hydroxyl group of the N-acetyl-D-glucosamine moiety, yielding UNAG-3P. UNAG-3P inhibits MurA, the first committed step in cell wall synthesis, which is then blocked. Phosphorylation is inhibited by cognate epsilon antitoxin. Part of a postsegregational killing (PSK) system involved in the killing of plasmid-free cells. The zeta toxin induces programmed cell death.[REFERENCE:7]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

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.

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^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Meinhart A, Alonso JC, Strater N, Saenger W. Crystal structure of the plasmid maintenance system epsilon/zeta: functional mechanism of toxin zeta and inactivation by epsilon 2 zeta 2 complex formation. Proc Natl Acad Sci U S A. 2003 Feb 18;100(4):1661-6. Epub 2003 Feb 5. PMID:12571357 doi:10.1073/pnas.0434325100

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1gvn"

@@ Line 1: / Line 1: @@
 ==Crystal Structure of the Plasmid Maintenance System epsilon/zeta: Meachnism of toxin inactivation and toxin function==
-<StructureSection load='1gvn' size='340' side='right' caption='[[1gvn]], [[Resolution|resolution]] 1.95&Aring;' scene=''>
+<StructureSection load='1gvn' size='340' side='right'caption='[[1gvn]], [[Resolution|resolution]] 1.95&Aring;' scene=''>
 == Structural highlights ==
 <table><tr><td colspan='2'>[[1gvn]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Streptococcus_pyogenes Streptococcus pyogenes]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1GVN OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1GVN FirstGlance]. <br>
@@ Line 32: / Line 32: @@
 __TOC__
 </StructureSection>
+[[Category: Large Structures]]
 [[Category: Streptococcus pyogenes]]
 [[Category: Alonso, J C]]

1gvn

From Proteopedia

Revision as of 06:41, 24 July 2019

Crystal Structure of the Plasmid Maintenance System epsilon/zeta: Meachnism of toxin inactivation and toxin function

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox