View source for 5d1q


==IsdB NEAT2 bound by clone D2-06==
<StructureSection load='5d1q' size='340' side='right'caption='[[5d1q]], [[Resolution|resolution]] 3.22&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[5d1q]] is a 5 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] and [https://en.wikipedia.org/wiki/Staphylococcus_aureus_RF122 Staphylococcus aureus RF122]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5D1Q OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5D1Q FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 3.22&#8491;</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=5d1q FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5d1q OCA], [https://pdbe.org/5d1q PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5d1q RCSB], [https://www.ebi.ac.uk/pdbsum/5d1q PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5d1q ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/ISDB_STAA8 ISDB_STAA8] Cell wall-anchored surface receptor that extracts heme from oxidized metHb to enable growth on hemoglobin as a sole iron source. Rapidly extracts heme from hemoglobin and transfers it to IsdA or IsdC, which then relays it to the membrane transporter/IsdEF for internalization. Promotes also resistance to hydrogen peroxide and killing by neutrophils.[UniProtKB:A6QG30]
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Staphylococcus aureus is both an important pathogen and a human commensal. To explore this ambivalent relationship between host and microbe, we analysed the memory humoral response against IsdB, a protein involved in iron acquisition, in four healthy donors. Here we show that in all donors a heavily biased use of two immunoglobulin heavy chain germlines generated high affinity (pM) antibodies that neutralize the two IsdB NEAT domains, IGHV4-39 for NEAT1 and IGHV1-69 for NEAT2. In contrast to the typical antibody/antigen interactions, the binding is primarily driven by the germline-encoded hydrophobic CDRH-2 motifs of IGHV1-69 and IGHV4-39, with a binding mechanism nearly identical for each antibody derived from different donors. Our results suggest that IGHV1-69 and IGHV4-39, while part of the adaptive immune system, may have evolved under selection pressure to encode a binding motif innately capable of recognizing and neutralizing a structurally conserved protein domain involved in pathogen iron acquisition.

Germline-encoded neutralization of a Staphylococcus aureus virulence factor by the human antibody repertoire.,Yeung YA, Foletti D, Deng X, Abdiche Y, Strop P, Glanville J, Pitts S, Lindquist K, Sundar PD, Sirota M, Hasa-Moreno A, Pham A, Melton Witt J, Ni I, Pons J, Shelton D, Rajpal A, Chaparro-Riggers J Nat Commun. 2016 Nov 18;7:13376. doi: 10.1038/ncomms13376. PMID:27857134<ref>PMID:27857134</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 5d1q" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Staphylococcus aureus RF122]]
[[Category: Deng X]]