1gyt

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[[Image:1gyt.gif|left|200px]]
[[Image:1gyt.gif|left|200px]]
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{{Structure
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<!--
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|PDB= 1gyt |SIZE=350|CAPTION= <scene name='initialview01'>1gyt</scene>, resolution 2.5&Aring;
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The line below this paragraph, containing "STRUCTURE_1gyt", creates the "Structure Box" on the page.
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|SITE= <scene name='pdbsite=ZA1:Co3+Binding+Site+For+Chain+L'>ZA1</scene>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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|LIGAND= <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=CO3:CARBONATE+ION'>CO3</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene>
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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|ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/Leucyl_aminopeptidase Leucyl aminopeptidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.11.1 3.4.11.1] </span>
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or leave the SCENE parameter empty for the default display.
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|GENE=
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-->
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|DOMAIN=
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{{STRUCTURE_1gyt| PDB=1gyt | SCENE= }}
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|RELATEDENTRY=
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1gyt FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1gyt OCA], [http://www.ebi.ac.uk/pdbsum/1gyt PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1gyt RCSB]</span>
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}}
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'''E. COLI AMINOPEPTIDASE A (PEPA)'''
'''E. COLI AMINOPEPTIDASE A (PEPA)'''
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[[Category: Single protein]]
[[Category: Single protein]]
[[Category: Straeter, N.]]
[[Category: Straeter, N.]]
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[[Category: aminopeptidase]]
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[[Category: Aminopeptidase]]
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[[Category: dna recombination]]
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[[Category: Dna recombination]]
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[[Category: hydrolase]]
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[[Category: Hydrolase]]
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[[Category: peptidase]]
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[[Category: Peptidase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 18:11:30 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 20:54:07 2008''
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Revision as of 15:11, 2 May 2008

Image:1gyt.gif

Template:STRUCTURE 1gyt

E. COLI AMINOPEPTIDASE A (PEPA)


Overview

The structure of aminopeptidase A (PepA), which functions as a DNA-binding protein in Xer site-specific recombination and in transcriptional control of the carAB operon in Escherichia coli, has been determined at 2.5 A resolution. In Xer recombination at cer, PepA and the arginine repressor (ArgR) serve as accessory proteins, ensuring that recombination is exclusively intramolecular. In contrast, PepA homologues from other species have no known DNA-binding activity and are not implicated in transcriptional regulation or control of site-specific recombination. PepA comprises two domains, which have similar folds to the two domains of bovine lens leucine aminopeptidase (LAP). However, the N-terminal domain of PepA, which probably plays a significant role in DNA binding, is rotated by 19 degrees compared with its position in LAP. PepA is a homohexamer of 32 symmetry. A groove that runs from one trimer face across the 2-fold molecular axis to the other trimer face is proposed to be the DNA-binding site. Molecular modelling supports a structure of the Xer complex in which PepA, ArgR and a second PepA molecule are sandwiched along their 3-fold molecular axes, and the accessory sequences of the two recombination sites wrap around the accessory proteins as a right-handed superhelix such that three negative supercoils are trapped.

About this Structure

1GYT is a Single protein structure of sequence from Escherichia coli. Full crystallographic information is available from OCA.

Reference

X-ray structure of aminopeptidase A from Escherichia coli and a model for the nucleoprotein complex in Xer site-specific recombination., Strater N, Sherratt DJ, Colloms SD, EMBO J. 1999 Aug 16;18(16):4513-22. PMID:10449417 Page seeded by OCA on Fri May 2 18:11:30 2008

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