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1hb3

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ISOPENICILLIN N SYNTHASE FROM ASPERGILLUS NIDULANS (OXYGEN EXPOSED PRODUCT FROM ANAEROBIC ACOV FE COMPLEX)

Structural highlights

1hb3 is a 1 chain structure with sequence from Aspergillus nidulans. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 1.4Å
Ligands:	, ,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

IPNA_EMENI Isopenicillin N synthase; part of the gene cluster that mediates the biosynthesis of penicillin, the world's most important antibiotic (PubMed:3319778, PubMed:11755401). IpnA catalyzes the cyclization of the tripeptide N-[(5S)-5-amino-5-carboxypentanoyl]-L-cysteinyl-D-valine (LLD-ACV or ACV) to form isopenicillin N (IPN) that contains the beta-lactam nucleus (PubMed:3319778, PubMed:11755401, PubMed:28703303). The penicillin biosynthesis occurs via 3 enzymatic steps, the first corresponding to the production of the tripeptide N-[(5S)-5-amino-5-carboxypentanoyl]-L-cysteinyl-D-valine (LLD-ACV or ACV) by the NRPS acvA. The tripeptide ACV is then cyclized to isopenicillin N (IPN) by the isopenicillin N synthase ipnA that forms the beta-lactam nucleus. Finally, the alpha-aminoadipyl side chain is exchanged for phenylacetic acid by the isopenicillin N acyltransferase penDE to yield penicillin in the peroxisomal matrix (By similarity).[UniProtKB:P08703]^[1] ^[2] ^[3]

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

BACKGROUND: Isopenicillin N synthase (IPNS) catalyses formation of bicyclic isopenicillin N, precursor to all penicillin and cephalosporin antibiotics, from the linear tripeptide delta-(L-alpha-aminoadipoyl)-L-cysteinyl-D-valine. IPNS is a non-haem iron(II)-dependent enzyme which utilises the full oxidising potential of molecular oxygen in catalysing the bicyclisation reaction. The reaction mechanism is believed to involve initial formation of the beta-lactam ring (via a thioaldehyde intermediate) to give an iron(IV)-oxo species, which then mediates closure of the 5-membered thiazolidine ring. RESULTS: Here we report experiments employing time-resolved crystallography to observe turnover of an isosteric substrate analogue designed to intercept the catalytic pathway at an early stage. Reaction in the crystalline enzyme-substrate complex was initiated by the application of high-pressure oxygen, and subsequent flash freezing allowed an oxygenated product to be trapped, bound at the iron centre. A mechanism for formation of the observed thiocarboxylate product is proposed. CONCLUSIONS: In the absence of its natural reaction partner (the N-H proton of the L-cysteinyl-D-valine amide bond), the proposed hydroperoxide intermediate appears to attack the putative thioaldehyde species directly. These results shed light on the events preceding beta-lactam closure in the IPNS reaction cycle, and enhance our understanding of the mechanism for reaction of the enzyme with its natural substrate.

Alternative oxidation by isopenicillin N synthase observed by X-ray diffraction.,Ogle JM, Clifton IJ, Rutledge PJ, Elkins JM, Burzlaff NI, Adlington RM, Roach PL, Baldwin JE Chem Biol. 2001 Dec;8(12):1231-7. PMID:11755401^[4]

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

References

↑ Ogle JM, Clifton IJ, Rutledge PJ, Elkins JM, Burzlaff NI, Adlington RM, Roach PL, Baldwin JE. Alternative oxidation by isopenicillin N synthase observed by X-ray diffraction. Chem Biol. 2001 Dec;8(12):1231-7. PMID:11755401
↑ McNeill LA, Brown TJN, Sami M, Clifton IJ, Burzlaff NI, Claridge TDW, Adlington RM, Baldwin JE, Rutledge PJ, Schofield CJ. Terminally Truncated Isopenicillin N Synthase Generates a Dithioester Product: Evidence for a Thioaldehyde Intermediate during Catalysis and a New Mode of Reaction for Non-Heme Iron Oxidases. Chemistry. 2017 Sep 18;23(52):12815-12824. doi: 10.1002/chem.201701592. Epub 2017, Aug 21. PMID:28703303 doi:http://dx.doi.org/10.1002/chem.201701592
↑ Ramon D, Carramolino L, Patino C, Sanchez F, Penalva MA. Cloning and characterization of the isopenicillin N synthetase gene mediating the formation of the beta-lactam ring in Aspergillus nidulans. Gene. 1987;57(2-3):171-81. doi: 10.1016/0378-1119(87)90120-x. PMID:3319778 doi:http://dx.doi.org/10.1016/0378-1119(87)90120-x
↑ Ogle JM, Clifton IJ, Rutledge PJ, Elkins JM, Burzlaff NI, Adlington RM, Roach PL, Baldwin JE. Alternative oxidation by isopenicillin N synthase observed by X-ray diffraction. Chem Biol. 2001 Dec;8(12):1231-7. PMID:11755401

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1hb3"

@@ Line 1: / Line 1: @@
 ==ISOPENICILLIN N SYNTHASE FROM ASPERGILLUS NIDULANS (OXYGEN EXPOSED PRODUCT FROM ANAEROBIC ACOV FE COMPLEX)==
-<StructureSection load='1hb3' size='340' side='right' caption='[[1hb3]], [[Resolution|resolution]] 1.40&Aring;' scene=''>
+<StructureSection load='1hb3' size='340' side='right'caption='[[1hb3]], [[Resolution|resolution]] 1.40&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[1hb3]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/A._nidulans A. nidulans]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1HB3 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1HB3 FirstGlance]. <br>
+<table><tr><td colspan='2'>[[1hb3]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Aspergillus_nidulans Aspergillus nidulans]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1HB3 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1HB3 FirstGlance]. <br>
-</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=FE2:FE+(II)+ION'>FE2</scene>, <scene name='pdbligand=SCV:N6-[(1S)-2-{[(1R)-1-CARBOXY-2-METHYLPROPYL]OXY}-1-(MERCAPTOCARBONYL)-2-OXOETHYL]-6-OXO-L-LYSINE'>SCV</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</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]] 1.4&#8491;</td></tr>
-<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1bk0|1bk0]], [[1blz|1blz]], [[1ips|1ips]], [[1qiq|1qiq]], [[1qje|1qje]], [[1qjf|1qjf]], [[1hb1|1hb1]], [[1hb2|1hb2]], [[1hb4|1hb4]]</td></tr>
+<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FE2:FE+(II)+ION'>FE2</scene>, <scene name='pdbligand=SCV:N6-[(1S)-2-{[(1R)-1-CARBOXY-2-METHYLPROPYL]OXY}-1-(MERCAPTOCARBONYL)-2-OXOETHYL]-6-OXO-L-LYSINE'>SCV</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
-<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">PCB C ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=162425 A. nidulans])</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=1hb3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1hb3 OCA], [https://pdbe.org/1hb3 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1hb3 RCSB], [https://www.ebi.ac.uk/pdbsum/1hb3 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1hb3 ProSAT]</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=1hb3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1hb3 OCA], [http://pdbe.org/1hb3 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1hb3 RCSB], [http://www.ebi.ac.uk/pdbsum/1hb3 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1hb3 ProSAT]</span></td></tr>
 </table>
 == Function ==
-[[http://www.uniprot.org/uniprot/IPNS_EMENI IPNS_EMENI]] Removes, in the presence of oxygen, 4 hydrogen atoms from delta-L-(alpha-aminoadipyl)-L-cysteinyl-D-valine (ACV) to form the azetidinone and thiazolidine rings of isopenicillin.
+[https://www.uniprot.org/uniprot/IPNA_EMENI IPNA_EMENI] Isopenicillin N synthase; part of the gene cluster that mediates the biosynthesis of penicillin, the world's most important antibiotic (PubMed:3319778, PubMed:11755401). IpnA catalyzes the cyclization of the tripeptide N-[(5S)-5-amino-5-carboxypentanoyl]-L-cysteinyl-D-valine (LLD-ACV or ACV) to form isopenicillin N (IPN) that contains the beta-lactam nucleus (PubMed:3319778, PubMed:11755401, PubMed:28703303). The penicillin biosynthesis occurs via 3 enzymatic steps, the first corresponding to the production of the tripeptide N-[(5S)-5-amino-5-carboxypentanoyl]-L-cysteinyl-D-valine (LLD-ACV or ACV) by the NRPS acvA. The tripeptide ACV is then cyclized to isopenicillin N (IPN) by the isopenicillin N synthase ipnA that forms the beta-lactam nucleus. Finally, the alpha-aminoadipyl side chain is exchanged for phenylacetic acid by the isopenicillin N acyltransferase penDE to yield penicillin in the peroxisomal matrix (By similarity).[UniProtKB:P08703]<ref>PMID:11755401</ref> <ref>PMID:28703303</ref> <ref>PMID:3319778</ref>
 == Evolutionary Conservation ==
 [[Image:Consurf_key_small.gif|200px|right]]
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/hb/1hb3_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/hb/1hb3_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>
@@ Line 37: / Line 36: @@
 __TOC__
 </StructureSection>
-[[Category: A. nidulans]]
+[[Category: Aspergillus nidulans]]
-[[Category: Adlington, R M]]
+[[Category: Large Structures]]
-[[Category: Baldwin, J E]]
+[[Category: Adlington RM]]
-[[Category: Burzlaff, N I]]
+[[Category: Baldwin JE]]
-[[Category: Clifton, I J]]
+[[Category: Burzlaff NI]]
-[[Category: Elkins, J M]]
+[[Category: Clifton IJ]]
-[[Category: Ogle, J M]]
+[[Category: Elkins JM]]
-[[Category: Roach, P L]]
+[[Category: Ogle JM]]
-[[Category: Rutledge, P J]]
+[[Category: Roach PL]]
-[[Category: Antibiotic biosynthesis]]
+[[Category: Rutledge PJ]]
-[[Category: B-lactam antibiotic]]
-[[Category: Oxygenase]]
-[[Category: Penicillin biosynthesis]]

1hb3

From Proteopedia

Current revision

ISOPENICILLIN N SYNTHASE FROM ASPERGILLUS NIDULANS (OXYGEN EXPOSED PRODUCT FROM ANAEROBIC ACOV FE COMPLEX)

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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