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| | ==Crystal structure of Escherichia coli Tryptophanase in 'semi-holo' form== | | ==Crystal structure of Escherichia coli Tryptophanase in 'semi-holo' form== |
| - | <StructureSection load='4w1y' size='340' side='right' caption='[[4w1y]], [[Resolution|resolution]] 3.20Å' scene=''> | + | <StructureSection load='4w1y' size='340' side='right'caption='[[4w1y]], [[Resolution|resolution]] 3.20Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[4w1y]] is a 2 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=4W1Y OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4W1Y FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[4w1y]] is a 2 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=4W1Y OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4W1Y FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr> | + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=LLP:(2S)-2-AMINO-6-[[3-HYDROXY-2-METHYL-5-(PHOSPHONOOXYMETHYL)PYRIDIN-4-YL]METHYLIDENEAMINO]HEXANOIC+ACID'>LLP</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr> |
| - | <tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=LLP:(2S)-2-AMINO-6-[[3-HYDROXY-2-METHYL-5-(PHOSPHONOOXYMETHYL)PYRIDIN-4-YL]METHYLIDENEAMINO]HEXANOIC+ACID'>LLP</scene></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=4w1y FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4w1y OCA], [https://pdbe.org/4w1y PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4w1y RCSB], [https://www.ebi.ac.uk/pdbsum/4w1y PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4w1y ProSAT]</span></td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2oqx|2oqx]], [[4w4h|4w4h]]</td></tr>
| + | |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">tnaA, ind, b3708, JW3686 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=83333 ECOLI])</td></tr>
| + | |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Tryptophanase Tryptophanase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=4.1.99.1 4.1.99.1] </span></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=4w1y FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4w1y OCA], [http://pdbe.org/4w1y PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4w1y RCSB], [http://www.ebi.ac.uk/pdbsum/4w1y PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4w1y ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | + | == Function == |
| | + | [https://www.uniprot.org/uniprot/TNAA_ECOLI TNAA_ECOLI] |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Ecoli]] | + | [[Category: Escherichia coli K-12]] |
| - | [[Category: Tryptophanase]] | + | [[Category: Large Structures]] |
| - | [[Category: Goldgur, Y]] | + | [[Category: Goldgur Y]] |
| - | [[Category: Lyase]]
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| Structural highlights
Function
TNAA_ECOLI
Publication Abstract from PubMed
Two crystal forms of Escherichia coli tryptophanase (tryptophan indole-lyase, Trpase) were obtained under the same crystallization conditions. Both forms belonged to the same space group P43212 but had slightly different unit-cell parameters. The holo crystal form, with pyridoxal phosphate (PLP) bound to Lys270 of both polypeptide chains in the asymmetric unit, diffracted to 2.9 A resolution. The second crystal form diffracted to 3.2 A resolution. Of the two subunits in the asymmetric unit, one was found in the holo form, while the other appeared to be in the apo form in a wide-open conformation with two sulfate ions bound in the vicinity of the active site. The conformation of all holo subunits is the same in both crystal forms. The structures suggest that Trpase is flexible in the apo form. Its conformation partially closes upon binding of PLP. The closed conformation might correspond to the enzyme in its active state with both cofactor and substrate bound in a similar way as in tyrosine phenol-lyase.
Structures of Escherichia coli tryptophanase in holo and `semi-holo' forms.,Kogan A, Raznov L, Gdalevsky GY, Cohen-Luria R, Almog O, Parola AH, Goldgur Y Acta Crystallogr F Struct Biol Commun. 2015 Mar 1;71(Pt 3):286-90. doi:, 10.1107/S2053230X15000850. Epub 2015 Feb 19. PMID:25760702[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Kogan A, Raznov L, Gdalevsky GY, Cohen-Luria R, Almog O, Parola AH, Goldgur Y. Structures of Escherichia coli tryptophanase in holo and `semi-holo' forms. Acta Crystallogr F Struct Biol Commun. 2015 Mar 1;71(Pt 3):286-90. doi:, 10.1107/S2053230X15000850. Epub 2015 Feb 19. PMID:25760702 doi:http://dx.doi.org/10.1107/S2053230X15000850
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