4jzc

From Proteopedia

(Difference between revisions)

Current revision

Angiopoietin-2 fibrinogen domain TAG mutant

Structural highlights

4jzc is a 1 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 1.9Å
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

ANGP2_HUMAN Binds to TEK/TIE2, competing for the ANGPT1 binding site, and modulating ANGPT1 signaling. Can induce tyrosine phosphorylation of TEK/TIE2 in the absence of ANGPT1. In the absence of angiogenic inducers, such as VEGF, ANGPT2-mediated loosening of cell-matrix contacts may induce endothelial cell apoptosis with consequent vascular regression. In concert with VEGF, it may facilitate endothelial cell migration and proliferation, thus serving as a permissive angiogenic signal.^[1] ^[2] ^[3] ^[4]

Publication Abstract from PubMed

Angiogenesis is a complex cellular process involving multiple regulatory growth factors and growth factor receptors. Among them, the ligands for the endothelial-specific tunica intima endothelial receptor tyrosine kinase 2 (Tie2) receptor kinase, angiopoietin-1 (Ang1) and Ang2, play essential roles in balancing vessel stability and regression during both developmental and tumor-induced angiogenesis. Despite possessing a high degree of sequence identity, Ang1 and Ang2 have distinct functional roles and cell-signaling characteristics. Here, we present the crystal structures of Ang1 both unbound and in complex with the Tie2 ectodomain. Comparison of the Ang1-containing structures with their Ang2-containing counterparts provide insight into the mechanism of receptor activation and reveal molecular surfaces important for interactions with Tie2 coreceptors and associated signaling proteins. Using structure-based mutagenesis, we identify a loop within the angiopoietin P domain, adjacent to the receptor-binding interface, which confers the specific agonist/antagonist properties of the molecule. We demonstrate using cell-based assays that an Ang2 chimera containing the Ang1 loop sequence behaves functionally similarly to Ang1 as a constitutive Tie2 agonist, able to efficiently dissociate the inhibitory Tie1/Tie2 complex and elicit Tie2 clustering and downstream signaling.

Structural basis for angiopoietin-1-mediated signaling initiation.,Yu X, Seegar TC, Dalton AC, Tzvetkova-Robev D, Goldgur Y, Rajashankar KR, Nikolov DB, Barton WA Proc Natl Acad Sci U S A. 2013 Apr 30;110(18):7205-10. doi:, 10.1073/pnas.1216890110. Epub 2013 Apr 16. PMID:23592718^[5]

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

References

↑ Maisonpierre PC, Suri C, Jones PF, Bartunkova S, Wiegand SJ, Radziejewski C, Compton D, McClain J, Aldrich TH, Papadopoulos N, Daly TJ, Davis S, Sato TN, Yancopoulos GD. Angiopoietin-2, a natural antagonist for Tie2 that disrupts in vivo angiogenesis. Science. 1997 Jul 4;277(5322):55-60. PMID:9204896
↑ Lee HJ, Cho CH, Hwang SJ, Choi HH, Kim KT, Ahn SY, Kim JH, Oh JL, Lee GM, Koh GY. Biological characterization of angiopoietin-3 and angiopoietin-4. FASEB J. 2004 Aug;18(11):1200-8. PMID:15284220 doi:10.1096/fj.03-1466com
↑ Yacyshyn OK, Lai PF, Forse K, Teichert-Kuliszewska K, Jurasz P, Stewart DJ. Tyrosine phosphatase beta regulates angiopoietin-Tie2 signaling in human endothelial cells. Angiogenesis. 2009;12(1):25-33. doi: 10.1007/s10456-008-9126-0. Epub 2009 Jan 1. PMID:19116766 doi:10.1007/s10456-008-9126-0
↑ Yuan HT, Khankin EV, Karumanchi SA, Parikh SM. Angiopoietin 2 is a partial agonist/antagonist of Tie2 signaling in the endothelium. Mol Cell Biol. 2009 Apr;29(8):2011-22. doi: 10.1128/MCB.01472-08. Epub 2009 Feb, 17. PMID:19223473 doi:10.1128/MCB.01472-08
↑ Yu X, Seegar TC, Dalton AC, Tzvetkova-Robev D, Goldgur Y, Rajashankar KR, Nikolov DB, Barton WA. Structural basis for angiopoietin-1-mediated signaling initiation. Proc Natl Acad Sci U S A. 2013 Apr 30;110(18):7205-10. doi:, 10.1073/pnas.1216890110. Epub 2013 Apr 16. PMID:23592718 doi:http://dx.doi.org/10.1073/pnas.1216890110

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/4jzc"

@@ Line 1: / Line 1: @@
 ==Angiopoietin-2 fibrinogen domain TAG mutant==
-<StructureSection load='4jzc' size='340' side='right' caption='[[4jzc]], [[Resolution|resolution]] 1.90&Aring;' scene=''>
+<StructureSection load='4jzc' size='340' side='right'caption='[[4jzc]], [[Resolution|resolution]] 1.90&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[4jzc]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4JZC OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4JZC FirstGlance]. <br>
+<table><tr><td colspan='2'>[[4jzc]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4JZC OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4JZC FirstGlance]. <br>
-</td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2gy5|2gy5]], [[1z3s|1z3s]], [[1z3u|1z3u]]</td></tr>
+</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.9&#8491;</td></tr>
-<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">ANGPT2 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens])</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=4jzc FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4jzc OCA], [https://pdbe.org/4jzc PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4jzc RCSB], [https://www.ebi.ac.uk/pdbsum/4jzc PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4jzc ProSAT]</span></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=4jzc FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4jzc OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4jzc RCSB], [http://www.ebi.ac.uk/pdbsum/4jzc PDBsum]</span></td></tr>
 </table>
+== Function ==
+[https://www.uniprot.org/uniprot/ANGP2_HUMAN ANGP2_HUMAN] Binds to TEK/TIE2, competing for the ANGPT1 binding site, and modulating ANGPT1 signaling. Can induce tyrosine phosphorylation of TEK/TIE2 in the absence of ANGPT1. In the absence of angiogenic inducers, such as VEGF, ANGPT2-mediated loosening of cell-matrix contacts may induce endothelial cell apoptosis with consequent vascular regression. In concert with VEGF, it may facilitate endothelial cell migration and proliferation, thus serving as a permissive angiogenic signal.<ref>PMID:9204896</ref> <ref>PMID:15284220</ref> <ref>PMID:19116766</ref> <ref>PMID:19223473</ref>
 <div style="background-color:#fffaf0;">
 == Publication Abstract from PubMed ==
@@ Line 15: / Line 17: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 4jzc" style="background-color:#fffaf0;"></div>
 == References ==
 <references/>
@@ Line 20: / Line 23: @@
 </StructureSection>
 [[Category: Homo sapiens]]
-[[Category: Barton, W A]]
+[[Category: Large Structures]]
-[[Category: Dalton, A C]]
+[[Category: Barton WA]]
-[[Category: Goldgur, Y]]
+[[Category: Dalton AC]]
-[[Category: Nikolov, D B]]
+[[Category: Goldgur Y]]
-[[Category: Seegar, T C.M]]
+[[Category: Nikolov DB]]
-[[Category: Tzvetkova-Robev, D]]
+[[Category: Seegar TCM]]
-[[Category: Yu, X]]
+[[Category: Tzvetkova-Robev D]]
-[[Category: Fibrinogen-like receptor-binding domain]]
+[[Category: Yu X]]
-[[Category: Signaling protein]]
-[[Category: Tie2]]
-[[Category: Tie2 receptor-binding]]

4jzc

From Proteopedia

Current revision

Angiopoietin-2 fibrinogen domain TAG mutant

Structural highlights

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox