This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.

Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.

7psw

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Revision as of 19:46, 7 September 2022

Spin labeled IPNS S55C variant in complex with Fe and ACV under anaerobic conditions

Structural highlights

7psw is a 1 chain structure with sequence from Aspergillus nidulans FGSC A4. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
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]

Publication Abstract from PubMed

Isopenicillin N synthase (IPNS) catalyses formation of the beta-lactam and thiazolidine rings of isopenicillin N (IPN) from its linear tripeptide L-delta-(alpha-aminoadipoyl)-L-cysteinyl-D-valine (ACV) substrate in an iron and dioxygen (O2) dependent four electron oxidation without precedent in current synthetic chemistry. Recent X-ray free electron laser (XFEL) studies including time-resolved serial femtosecond crystallography show binding of O2 to the IPNS:Fe(II):ACV complex induces unexpected conformational changes in alpha-helices on the surface of IPNS, in particular in alpha3 and alpha10. However, how substrate binding leads to conformational changes away from the active site is unknown. Here, using detailed (19)F NMR and EPR experiments with labelled IPNS variants, we investigated motions in alpha3 and alpha10 induced by binding of ferrous iron, ACV and the O2 analogue NO, using the less mobile alpha6 for comparison. (19)F NMR studies were carried out on singly and doubly labelled alpha3, alpha6 and alpha10 variants at different temperatures. In addition, double electron-electron resonance (DEER) EPR analysis was carried out on doubly spin labelled variants. The combined spectroscopic and crystallographic results reveal that substantial conformational changes in regions of IPNS including alpha3 and alpha10 are induced by binding of ACV and NO. Since IPNS is a member of the structural superfamily of 2-oxoglutarate dependent oxygenases and related enzymes, related conformational changes may be of general importance in non-heme oxygenase catalysis.

Spectroscopic studies reveal details of substrate-induced conformational changes distant from the active site in isopenicillin N synthase.,Rabe P, Walla CC, Goodyear NK, Welsh J, Southwart R, Clifton I, Linyard JDS, Tumber A, Claridge TDW, Myers WK, Schofield CJ J Biol Chem. 2022 Jul 11:102249. doi: 10.1016/j.jbc.2022.102249. PMID:35835215^[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
↑ Rabe P, Walla CC, Goodyear NK, Welsh J, Southwart R, Clifton I, Linyard JDS, Tumber A, Claridge TDW, Myers WK, Schofield CJ. Spectroscopic studies reveal details of substrate-induced conformational changes distant from the active site in isopenicillin N synthase. J Biol Chem. 2022 Jul 11:102249. doi: 10.1016/j.jbc.2022.102249. PMID:35835215 doi:http://dx.doi.org/10.1016/j.jbc.2022.102249

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/7psw"

@@ Line 3: / Line 3: @@
 <StructureSection load='7psw' size='340' side='right'caption='[[7psw]], [[Resolution|resolution]] 1.21&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[7psw]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7PSW OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7PSW FirstGlance]. <br>
+<table><tr><td colspan='2'>[[7psw]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Aspergillus_nidulans_FGSC_A4 Aspergillus nidulans FGSC A4]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7PSW OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7PSW FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACV:L-D-(A-AMINOADIPOYL)-L-CYSTEINYL-D-VALINE'>ACV</scene>, <scene name='pdbligand=FE:FE+(III)+ION'>FE</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
-<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[7poy|7poy]], [[6zam|6zam]]</div></td></tr>
-<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/Isopenicillin-N_synthase Isopenicillin-N synthase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.21.3.1 1.21.3.1] </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=7psw FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7psw OCA], [https://pdbe.org/7psw PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7psw RCSB], [https://www.ebi.ac.uk/pdbsum/7psw PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7psw ProSAT]</span></td></tr>
 </table>
 == Function ==
-[[https://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>
 <div style="background-color:#fffaf0;">
 == Publication Abstract from PubMed ==
@@ Line 24: / Line 22: @@
 __TOC__
 </StructureSection>
-[[Category: Isopenicillin-N synthase]]
+[[Category: Aspergillus nidulans FGSC A4]]
 [[Category: Large Structures]]
-[[Category: Clifton, I]]
+[[Category: Clifton I]]
-[[Category: Rabe, P]]
+[[Category: Rabe P]]
-[[Category: Schofield, C J]]
+[[Category: Schofield CJ]]
-[[Category: Walla, C]]
+[[Category: Walla C]]
-[[Category: Isopenicillin n synthase]]
-[[Category: Oxidase]]
-[[Category: Oxidoreductase]]
-[[Category: Penicillin biosynthesis]]
-[[Category: Spin labeled protein]]

7psw

From Proteopedia

Revision as of 19:46, 7 September 2022

Spin labeled IPNS S55C variant in complex with Fe and ACV under anaerobic conditions

Structural highlights

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox