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| | ==E. coli Aminopeptidase A (PepA)== | | ==E. coli Aminopeptidase A (PepA)== |
| - | <StructureSection load='1gyt' size='340' side='right' caption='[[1gyt]], [[Resolution|resolution]] 2.50Å' scene=''> | + | <StructureSection load='1gyt' size='340' side='right'caption='[[1gyt]], [[Resolution|resolution]] 2.50Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[1gyt]] is a 12 chain structure with sequence from [http://en.wikipedia.org/wiki/Ecoli Ecoli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1GYT OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1GYT FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[1gyt]] is a 12 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli_K-12 Escherichia coli K-12]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1GYT OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1GYT FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=CO3:CARBONATE+ION'>CO3</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.5Å</td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><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></td></tr>
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=CO3:CARBONATE+ION'>CO3</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr> |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><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://pdbe.org/1gyt PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1gyt RCSB], [http://www.ebi.ac.uk/pdbsum/1gyt PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1gyt ProSAT]</span></td></tr> | + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1gyt FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1gyt OCA], [https://pdbe.org/1gyt PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1gyt RCSB], [https://www.ebi.ac.uk/pdbsum/1gyt PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1gyt ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/AMPA_ECOLI AMPA_ECOLI]] Presumably involved in the processing and regular turnover of intracellular proteins. Catalyzes the removal of unsubstituted N-terminal amino acids from various peptides. Required for plasmid ColE1 site-specific recombination but not in its aminopeptidase activity. Could act as a structural component of the putative nucleoprotein complex in which the Xer recombination reaction takes place.[HAMAP-Rule:MF_00181] | + | [https://www.uniprot.org/uniprot/AMPA_ECOLI AMPA_ECOLI] Presumably involved in the processing and regular turnover of intracellular proteins. Catalyzes the removal of unsubstituted N-terminal amino acids from various peptides. Required for plasmid ColE1 site-specific recombination but not in its aminopeptidase activity. Could act as a structural component of the putative nucleoprotein complex in which the Xer recombination reaction takes place.[HAMAP-Rule:MF_00181] |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | </div> | | </div> |
| | <div class="pdbe-citations 1gyt" style="background-color:#fffaf0;"></div> | | <div class="pdbe-citations 1gyt" style="background-color:#fffaf0;"></div> |
| | + | |
| | + | ==See Also== |
| | + | *[[Aminopeptidase 3D structures|Aminopeptidase 3D structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Ecoli]] | + | [[Category: Escherichia coli K-12]] |
| - | [[Category: Leucyl aminopeptidase]] | + | [[Category: Large Structures]] |
| - | [[Category: Straeter, N]] | + | [[Category: Straeter N]] |
| - | [[Category: Aminopeptidase]]
| + | |
| - | [[Category: Dna recombination]]
| + | |
| - | [[Category: Hydrolase]]
| + | |
| - | [[Category: Peptidase]]
| + | |
| Structural highlights
Function
AMPA_ECOLI Presumably involved in the processing and regular turnover of intracellular proteins. Catalyzes the removal of unsubstituted N-terminal amino acids from various peptides. Required for plasmid ColE1 site-specific recombination but not in its aminopeptidase activity. Could act as a structural component of the putative nucleoprotein complex in which the Xer recombination reaction takes place.[HAMAP-Rule:MF_00181]
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
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.
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[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Strater N, Sherratt DJ, Colloms SD. X-ray structure of aminopeptidase A from Escherichia coli and a model for the nucleoprotein complex in Xer site-specific recombination. EMBO J. 1999 Aug 16;18(16):4513-22. PMID:10449417 doi:10.1093/emboj/18.16.4513
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