2l3h

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==NMR Structure in a Membrane Environment Reveals Putative Amyloidogenic Regions of the SEVI Precursor Peptide PAP248-286==
==NMR Structure in a Membrane Environment Reveals Putative Amyloidogenic Regions of the SEVI Precursor Peptide PAP248-286==
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<StructureSection load='2l3h' size='340' side='right' caption='[[2l3h]], [[NMR_Ensembles_of_Models | 8 NMR models]]' scene=''>
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<StructureSection load='2l3h' size='340' side='right'caption='[[2l3h]]' scene=''>
== Structural highlights ==
== Structural highlights ==
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<table><tr><td colspan='2'>[[2l3h]] is a 1 chain structure. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2L3H OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2L3H FirstGlance]. <br>
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<table><tr><td colspan='2'>[[2l3h]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2L3H OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2L3H FirstGlance]. <br>
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</td></tr><tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Acid_phosphatase Acid phosphatase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.1.3.2 3.1.3.2] </span></td></tr>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR</td></tr>
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<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=2l3h FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2l3h OCA], [http://pdbe.org/2l3h PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2l3h RCSB], [http://www.ebi.ac.uk/pdbsum/2l3h PDBsum]</span></td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2l3h FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2l3h OCA], [https://pdbe.org/2l3h PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2l3h RCSB], [https://www.ebi.ac.uk/pdbsum/2l3h PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2l3h ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
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[[http://www.uniprot.org/uniprot/PPAP_HUMAN PPAP_HUMAN]] A non-specific tyrosine phosphatase that dephosphorylates a diverse number of substrates under acidic conditions (pH 4-6) including alkyl, aryl, and acyl orthophosphate monoesters and phosphorylated proteins. Has lipid phosphatase activity and inactivates lysophosphatidic acid in seminal plasma.<ref>PMID:15280042</ref> <ref>PMID:18083097</ref> <ref>PMID:19403677</ref> <ref>PMID:20498373</ref> Isoform 2: the cellular form also has ecto-5'-nucleotidase activity in dorsal root ganglion (DRG) neurons. Generates adenosine from AMP which acts as a pain suppressor. Acts as a tumor suppressor of prostate cancer through dephosphorylation of ERBB2 and deactivation of MAPK-mediated signaling.<ref>PMID:15280042</ref> <ref>PMID:18083097</ref> <ref>PMID:19403677</ref> <ref>PMID:20498373</ref>
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[https://www.uniprot.org/uniprot/PPAP_HUMAN PPAP_HUMAN] A non-specific tyrosine phosphatase that dephosphorylates a diverse number of substrates under acidic conditions (pH 4-6) including alkyl, aryl, and acyl orthophosphate monoesters and phosphorylated proteins. Has lipid phosphatase activity and inactivates lysophosphatidic acid in seminal plasma.<ref>PMID:15280042</ref> <ref>PMID:18083097</ref> <ref>PMID:19403677</ref> <ref>PMID:20498373</ref> Isoform 2: the cellular form also has ecto-5'-nucleotidase activity in dorsal root ganglion (DRG) neurons. Generates adenosine from AMP which acts as a pain suppressor. Acts as a tumor suppressor of prostate cancer through dephosphorylation of ERBB2 and deactivation of MAPK-mediated signaling.<ref>PMID:15280042</ref> <ref>PMID:18083097</ref> <ref>PMID:19403677</ref> <ref>PMID:20498373</ref>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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Semen is the main vector for HIV transmission worldwide. Recently, a peptide fragment (PAP(248-286)) has been isolated from seminal fluid that dramatically enhances HIV infectivity by up to 4-5 orders of magnitude. PAP(248-286) appears to enhance HIV infection by forming amyloid fibers known as SEVI, which are believed to enhance the attachment of the virus by bridging interactions between virion and host-cell membranes. We have solved the atomic-level resolution structure of the SEVI precursor PAP(248-286) using NMR spectroscopy in SDS micelles, which serve as a model membrane system. PAP(248-286), which does not disrupt membranes like most amyloid proteins, binds superficially to the surface of the micelle, in contrast to other membrane-disruptive amyloid peptides that generally penetrate into the core of the membrane. The structure of PAP(248-286) is unlike most amyloid peptides in that PAP(248-286) is mostly disordered when bound to the surface of the micelle, as opposed to the alpha-helical structures typically found of most amyloid proteins. The highly disordered nature of the SEVI peptide may explain the unique ability of SEVI amyloid fibers to enhance HIV infection as partially disordered amyloid fibers will have a greater capture radius for the virus than compact amyloid fibers. Two regions of nascent structure (an alpha-helix from V262-H270 and a dynamic alpha/3(10) helix from S279-L283) match the prediction of highly amyloidogenic sequences and may serve as nuclei for aggregation and amyloid fibril formation. The structure presented here can be used for the rational design of mutagenesis studies on SEVI amyloid formation and viral infection enhancement.
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NMR structure in a membrane environment reveals putative amyloidogenic regions of the SEVI precursor peptide PAP(248-286).,Nanga RP, Brender JR, Vivekanandan S, Popovych N, Ramamoorthy A J Am Chem Soc. 2009 Dec 16;131(49):17972-9. PMID:19995078<ref>PMID:19995078</ref>
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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<div class="pdbe-citations 2l3h" style="background-color:#fffaf0;"></div>
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==See Also==
==See Also==
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*[[Acid phosphatase|Acid phosphatase]]
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*[[Acid phosphatase 3D structures|Acid phosphatase 3D structures]]
== References ==
== References ==
<references/>
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
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[[Category: Acid phosphatase]]
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[[Category: Homo sapiens]]
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[[Category: Brender, J]]
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[[Category: Large Structures]]
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[[Category: Nanga, R]]
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[[Category: Brender J]]
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[[Category: Popovych, N]]
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[[Category: Nanga R]]
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[[Category: Ramamoorthy, A]]
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[[Category: Popovych N]]
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[[Category: Vivekanandan, S]]
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[[Category: Ramamoorthy A]]
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[[Category: Hydrolase]]
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[[Category: Vivekanandan S]]
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[[Category: Pap248-286]]
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[[Category: Sevi]]
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Current revision

NMR Structure in a Membrane Environment Reveals Putative Amyloidogenic Regions of the SEVI Precursor Peptide PAP248-286

PDB ID 2l3h

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