1jhc: Difference between revisions
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[[Image:1jhc.gif|left|200px]] | [[Image:1jhc.gif|left|200px]] | ||
'''LEXA S119A C-TERMINAL TRYPTIC FRAGMENT''' | {{Structure | ||
|PDB= 1jhc |SIZE=350|CAPTION= <scene name='initialview01'>1jhc</scene>, resolution 2.0Å | |||
|SITE= | |||
|LIGAND= | |||
|ACTIVITY= [http://en.wikipedia.org/wiki/Repressor_lexA Repressor lexA], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.21.88 3.4.21.88] | |||
|GENE= LexA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 Escherichia coli]) | |||
}} | |||
'''LEXA S119A C-TERMINAL TRYPTIC FRAGMENT''' | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
1JHC is a [ | 1JHC is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1JHC OCA]. | ||
==Reference== | ==Reference== | ||
Crystal structure of LexA: a conformational switch for regulation of self-cleavage., Luo Y, Pfuetzner RA, Mosimann S, Paetzel M, Frey EA, Cherney M, Kim B, Little JW, Strynadka NC, Cell. 2001 Sep 7;106(5):585-94. PMID:[http:// | Crystal structure of LexA: a conformational switch for regulation of self-cleavage., Luo Y, Pfuetzner RA, Mosimann S, Paetzel M, Frey EA, Cherney M, Kim B, Little JW, Strynadka NC, Cell. 2001 Sep 7;106(5):585-94. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/11551506 11551506] | ||
[[Category: Escherichia coli]] | [[Category: Escherichia coli]] | ||
[[Category: Repressor lexA]] | [[Category: Repressor lexA]] | ||
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[[Category: lexa sos repressor]] | [[Category: lexa sos repressor]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 12:03:25 2008'' | ||
Revision as of 13:03, 20 March 2008
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| , resolution 2.0Å | |||||||
|---|---|---|---|---|---|---|---|
| Gene: | LexA (Escherichia coli) | ||||||
| Activity: | Repressor lexA, with EC number 3.4.21.88 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
LEXA S119A C-TERMINAL TRYPTIC FRAGMENT
OverviewOverview
LexA repressor undergoes a self-cleavage reaction. In vivo, this reaction requires an activated form of RecA, but it occurs spontaneously in vitro at high pH. Accordingly, LexA must both allow self-cleavage and yet prevent this reaction in the absence of a stimulus. We have solved the crystal structures of several mutant forms of LexA. Strikingly, two distinct conformations are observed, one compatible with cleavage, and the other in which the cleavage site is approximately 20 A from the catalytic center. Our analysis provides insight into the structural and energetic features that modulate the interconversion between these two forms and hence the rate of the self-cleavage reaction. We suggest RecA activates the self-cleavage of LexA and related proteins through selective stabilization of the cleavable conformation.
About this StructureAbout this Structure
1JHC is a Single protein structure of sequence from Escherichia coli. Full crystallographic information is available from OCA.
ReferenceReference
Crystal structure of LexA: a conformational switch for regulation of self-cleavage., Luo Y, Pfuetzner RA, Mosimann S, Paetzel M, Frey EA, Cherney M, Kim B, Little JW, Strynadka NC, Cell. 2001 Sep 7;106(5):585-94. PMID:11551506
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