7pgk: Difference between revisions
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==HHIP-N, the N-terminal domain of the Hedgehog-Interacting Protein (HHIP), in complex with glycosaminoglycan mimic SOS== | ==HHIP-N, the N-terminal domain of the Hedgehog-Interacting Protein (HHIP), in complex with glycosaminoglycan mimic SOS== | ||
<StructureSection load='7pgk' size='340' side='right'caption='[[7pgk]]' scene=''> | <StructureSection load='7pgk' size='340' side='right'caption='[[7pgk]], [[Resolution|resolution]] 2.75Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7PGK OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7PGK FirstGlance]. <br> | <table><tr><td colspan='2'>[[7pgk]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7PGK OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7PGK FirstGlance]. <br> | ||
</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=7pgk FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7pgk OCA], [https://pdbe.org/7pgk PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7pgk RCSB], [https://www.ebi.ac.uk/pdbsum/7pgk PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7pgk ProSAT]</span></td></tr> | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GU4:2,3,4,6-TETRA-O-SULFONATO-ALPHA-D-GLUCOPYRANOSE'>GU4</scene></td></tr> | ||
<tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=YYJ:'>YYJ</scene></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=7pgk FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7pgk OCA], [https://pdbe.org/7pgk PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7pgk RCSB], [https://www.ebi.ac.uk/pdbsum/7pgk PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7pgk ProSAT]</span></td></tr> | |||
</table> | </table> | ||
== Function == | |||
[[https://www.uniprot.org/uniprot/HHIP_HUMAN HHIP_HUMAN]] Modulates hedgehog signaling in several cell types including brain and lung through direct interaction with members of the hedgehog family.<ref>PMID:11472839</ref> <ref>PMID:19561609</ref> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Hedgehog (HH) morphogen signalling, crucial for cell growth and tissue patterning in animals, is initiated by the binding of dually lipidated HH ligands to cell surface receptors. Hedgehog-Interacting Protein (HHIP), the only reported secreted inhibitor of Sonic Hedgehog (SHH) signalling, binds directly to SHH with high nanomolar affinity, sequestering SHH. Here, we report the structure of the HHIP N-terminal domain (HHIP-N) in complex with a glycosaminoglycan (GAG). HHIP-N displays a unique bipartite fold with a GAG-binding domain alongside a Cysteine Rich Domain (CRD). We show that HHIP-N is required to convey full HHIP inhibitory function, likely by interacting with the cholesterol moiety covalently linked to HH ligands, thereby preventing this SHH-attached cholesterol from binding to the HH receptor Patched (PTCH1). We also present the structure of the HHIP C-terminal domain in complex with the GAG heparin. Heparin can bind to both HHIP-N and HHIP-C, thereby inducing clustering at the cell surface and generating a high-avidity platform for SHH sequestration and inhibition. Our data suggest a multimodal mechanism, in which HHIP can bind two specific sites on the SHH morphogen, alongside multiple GAG interactions, to inhibit SHH signalling. | |||
Hedgehog-Interacting Protein is a multimodal antagonist of Hedgehog signalling.,Griffiths SC, Schwab RA, El Omari K, Bishop B, Iverson EJ, Malinauskas T, Dubey R, Qian M, Covey DF, Gilbert RJC, Rohatgi R, Siebold C Nat Commun. 2021 Dec 9;12(1):7171. doi: 10.1038/s41467-021-27475-2. PMID:34887403<ref>PMID:34887403</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 7pgk" style="background-color:#fffaf0;"></div> | |||
== References == | |||
<references/> | |||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: Large Structures]] | [[Category: Large Structures]] | ||
[[Category: Bishop B]] | [[Category: Bishop, B]] | ||
[[Category: Covey | [[Category: Covey, D F]] | ||
[[Category: Dubey R]] | [[Category: Dubey, R]] | ||
[[Category: | [[Category: Gilbert, R J.C]] | ||
[[Category: | [[Category: Griffiths, S C]] | ||
[[Category: | [[Category: Iverson, E J]] | ||
[[Category: | [[Category: Malinuskas, T]] | ||
[[Category: | [[Category: Omari, K El]] | ||
[[Category: Qian M]] | [[Category: Qian, M]] | ||
[[Category: Rohatgi R]] | [[Category: Rohatgi, R]] | ||
[[Category: Schwab | [[Category: Schwab, R A]] | ||
[[Category: Siebold C]] | [[Category: Siebold, C]] | ||
[[Category: Cholesterol]] | |||
[[Category: Glycosaminoglycan]] | |||
[[Category: Hedgehog]] | |||
[[Category: Hhip]] | |||
[[Category: Morphogen]] | |||
[[Category: Palmitate]] | |||
[[Category: Secreted]] | |||
[[Category: Signaling protein]] | |||
[[Category: Signalling]] |
Latest revision as of 18:40, 22 December 2021
HHIP-N, the N-terminal domain of the Hedgehog-Interacting Protein (HHIP), in complex with glycosaminoglycan mimic SOSHHIP-N, the N-terminal domain of the Hedgehog-Interacting Protein (HHIP), in complex with glycosaminoglycan mimic SOS
Structural highlights
Function[HHIP_HUMAN] Modulates hedgehog signaling in several cell types including brain and lung through direct interaction with members of the hedgehog family.[1] [2] Publication Abstract from PubMedHedgehog (HH) morphogen signalling, crucial for cell growth and tissue patterning in animals, is initiated by the binding of dually lipidated HH ligands to cell surface receptors. Hedgehog-Interacting Protein (HHIP), the only reported secreted inhibitor of Sonic Hedgehog (SHH) signalling, binds directly to SHH with high nanomolar affinity, sequestering SHH. Here, we report the structure of the HHIP N-terminal domain (HHIP-N) in complex with a glycosaminoglycan (GAG). HHIP-N displays a unique bipartite fold with a GAG-binding domain alongside a Cysteine Rich Domain (CRD). We show that HHIP-N is required to convey full HHIP inhibitory function, likely by interacting with the cholesterol moiety covalently linked to HH ligands, thereby preventing this SHH-attached cholesterol from binding to the HH receptor Patched (PTCH1). We also present the structure of the HHIP C-terminal domain in complex with the GAG heparin. Heparin can bind to both HHIP-N and HHIP-C, thereby inducing clustering at the cell surface and generating a high-avidity platform for SHH sequestration and inhibition. Our data suggest a multimodal mechanism, in which HHIP can bind two specific sites on the SHH morphogen, alongside multiple GAG interactions, to inhibit SHH signalling. Hedgehog-Interacting Protein is a multimodal antagonist of Hedgehog signalling.,Griffiths SC, Schwab RA, El Omari K, Bishop B, Iverson EJ, Malinauskas T, Dubey R, Qian M, Covey DF, Gilbert RJC, Rohatgi R, Siebold C Nat Commun. 2021 Dec 9;12(1):7171. doi: 10.1038/s41467-021-27475-2. PMID:34887403[3] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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