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2m6h

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Solution structure of trans(C2-P3) trans (D5-P6) of LO959 in methanol

Structural highlights

2m6h is a 1 chain structure with sequence from Conus buxeus loroisii. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	Solution NMR
Ligands:
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

COW1_CONBL Activates high voltage-activated calcium channels (Cav). This activity is in contrast to other contryphans that inhibit high voltage-gated calcium channels.^[1]

Publication Abstract from PubMed

Conformational diversity or "shapeshifting" in cyclic peptide natural products can, in principle, confer a single molecular entity with the property of binding to multiple receptors. Conformational equilibria have been probed in the contryphans, which are peptides derived from Conus venom possessing a 23-membered cyclic disulfide moiety. The natural sequences derived from Conus inscriptus, GCV(D) LYPWC* (In936) and Conus loroisii, GCP(D) WDPWC* (Lo959) differ in the number of proline residues within the macrocyclic ring. Structural characterisation of distinct conformational states arising from cis-trans equilibria about Xxx-Pro bonds is reported. Isomerisation about the C2-P3 bond is observed in the case of Lo959 and about the Y5-P6 bond in In936. Evidence is presented for as many as four distinct species in the case of the synthetic analogue V3P In936. The Tyr-Pro-Trp segment in In936 is characterised by distinct sidechain orientations as a consequence of aromatic/proline interactions as evidenced by specific sidechain-sidechain nuclear Overhauser effects and ring current shifted proton chemical shifts. Molecular dynamics simulations suggest that Tyr5 and Trp7 sidechain conformations are correlated and depend on the geometry of the Xxx-Pro bond. Thermodynamic parameters are derived for the cis<--> trans equilibrium for In936. Studies on synthetic analogues provide insights into the role of sequence effects in modulating isomerisation about Xxx-Pro bonds.

Conformational Diversity in Contryphans from Conus Venom: cis-trans Isomerisation and Aromatic/Proline Interactions in the 23-Membered Ring of a 7-Residue Peptide Disulfide Loop.,Sonti R, Gowd KH, Rao KN, Ragothama S, Rodriguez A, Perez JJ, Balaram P Chemistry. 2013 Nov 4;19(45):15175-89. doi: 10.1002/chem.201301722. Epub 2013 Sep, 23. PMID:24115170^[2]

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

References

↑ Sabareesh V, Gowd KH, Ramasamy P, Sudarslal S, Krishnan KS, Sikdar SK, Balaram P. Characterization of contryphans from Conus loroisii and Conus amadis that target calcium channels. Peptides. 2006 Nov;27(11):2647-54. PMID:16945451 doi:10.1016/j.peptides.2006.07.009
↑ Sonti R, Gowd KH, Rao KN, Ragothama S, Rodriguez A, Perez JJ, Balaram P. Conformational Diversity in Contryphans from Conus Venom: cis-trans Isomerisation and Aromatic/Proline Interactions in the 23-Membered Ring of a 7-Residue Peptide Disulfide Loop. Chemistry. 2013 Nov 4;19(45):15175-89. doi: 10.1002/chem.201301722. Epub 2013 Sep, 23. PMID:24115170 doi:http://dx.doi.org/10.1002/chem.201301722

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/2m6h"

Categories: Conus buxeus loroisii | Large Structures | Sonti R

@@ Line 1: / Line 1: @@
 ==Solution structure of trans(C2-P3) trans (D5-P6) of LO959 in methanol==
-<StructureSection load='2m6h' size='340' side='right' caption='[[2m6h]], [[NMR_Ensembles_of_Models | 10 NMR models]]' scene=''>
+<StructureSection load='2m6h' size='340' side='right'caption='[[2m6h]]' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[2m6h]] is a 1 chain structure. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2M6H OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2M6H FirstGlance]. <br>
+<table><tr><td colspan='2'>[[2m6h]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Conus_buxeus_loroisii Conus buxeus loroisii]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2M6H OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2M6H FirstGlance]. <br>
-</td></tr><tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=DTR:D-TRYPTOPHAN'>DTR</scene></td></tr>
+</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR</td></tr>
-<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2m6c|2m6c]], [[2m6d|2m6d]], [[2m6e|2m6e]], [[2m6f|2m6f]], [[2m6g|2m6g]]</td></tr>
+<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=DTR:D-TRYPTOPHAN'>DTR</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=2m6h FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2m6h OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2m6h RCSB], [http://www.ebi.ac.uk/pdbsum/2m6h PDBsum]</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=2m6h FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2m6h OCA], [https://pdbe.org/2m6h PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2m6h RCSB], [https://www.ebi.ac.uk/pdbsum/2m6h PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2m6h ProSAT]</span></td></tr>
 </table>
 == Function ==
-[[http://www.uniprot.org/uniprot/COW_CONLO COW_CONLO]] Activates high voltage-activated calcium channels (Cav). This activity is in contrast to other contryphans that inhibit high voltage-gated calcium channels.
+[https://www.uniprot.org/uniprot/COW1_CONBL COW1_CONBL] Activates high voltage-activated calcium channels (Cav). This activity is in contrast to other contryphans that inhibit high voltage-gated calcium channels.<ref>PMID:16945451</ref>
 <div style="background-color:#fffaf0;">
 == Publication Abstract from PubMed ==
@@ Line 17: / Line 18: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 2m6h" style="background-color:#fffaf0;"></div>
 == References ==
 <references/>
 __TOC__
 </StructureSection>
-[[Category: Sonti, R]]
+[[Category: Conus buxeus loroisii]]
-[[Category: Lo959]]
+[[Category: Large Structures]]
-[[Category: Methanol]]
+[[Category: Sonti R]]
-[[Category: Toxin]]

2m6h

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Current revision

Solution structure of trans(C2-P3) trans (D5-P6) of LO959 in methanol

Structural highlights

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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