This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.

Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.

6icg

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Current revision

Grb2 SH2 domain in phosphopeptide free form

Structural highlights

6icg is a 2 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 1.15Å
Ligands:	,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

GRB2_HUMAN Adapter protein that provides a critical link between cell surface growth factor receptors and the Ras signaling pathway.^[1] ^[2] ^[3] Isoform 2 does not bind to phosphorylated epidermal growth factor receptor (EGFR) but inhibits EGF-induced transactivation of a RAS-responsive element. Isoform 2 acts as a dominant negative protein over GRB2 and by suppressing proliferative signals, may trigger active programmed cell death.^[4] ^[5] ^[6]

Publication Abstract from PubMed

Growth factor receptor-bound protein 2 (Grb2) is an adaptor protein that plays a critical role in cellular signal transduction. It contains a central Src homology 2 (SH2) domain flanked by two Src homology 3 (SH3) domains. Binding of Grb2 SH2 to the cytoplasmic region of CD28, phosphorylated Tyr (pY) containing the peptide motif pY-X-N-X, is required for costimulatory signaling in T cells. In this study, we purified the dimer and monomer forms of Grb2 SH2, respectively, and analyzed their structural and functional properties. Size exclusion chromatography analysis showed that both dimer and monomer exist as stable states. Thermal stability analysis using circular dichroism showed that the dimer mostly dissociates into the monomer around 50 degrees C. CD28 binding experiments showed that the affinity of the dimer to the phosphopeptide was about three fold higher than that of the monomer, possibly due to the avidity effect. The present crystal structure analysis of Grb2 SH2 showed two forms; one is monomer at 1.15 A resolution, which is currently the highest resolution analysis, and another is dimer at 2.00 A resolution. In the dimer structure, the C-terminal region, comprising residues 123-152, was extended towards the adjacent molecule, in which Trp121 was the hinge residue. The stable dimer purified using size exclusion chromatography would be due to the C-terminal helix "swapping". In cases where a mutation caused Trp121 to be replaced by Ser in Grb2 SH2, this protein still formed dimers, but lost the ability to bind CD28.

Structural and functional properties of Grb2 SH2 dimer in CD28 binding.,Hosoe Y, Numoto N, Inaba S, Ogawa S, Morii H, Abe R, Ito N, Oda M Biophys Physicobiol. 2019 Feb 22;16:80-88. doi: 10.2142/biophysico.16.0_80., eCollection 2019. PMID:30923665^[7]

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

References

↑ Lowenstein EJ, Daly RJ, Batzer AG, Li W, Margolis B, Lammers R, Ullrich A, Skolnik EY, Bar-Sagi D, Schlessinger J. The SH2 and SH3 domain-containing protein GRB2 links receptor tyrosine kinases to ras signaling. Cell. 1992 Aug 7;70(3):431-42. PMID:1322798
↑ Fath I, Schweighoffer F, Rey I, Multon MC, Boiziau J, Duchesne M, Tocque B. Cloning of a Grb2 isoform with apoptotic properties. Science. 1994 May 13;264(5161):971-4. PMID:8178156
↑ Pao-Chun L, Chan PM, Chan W, Manser E. Cytoplasmic ACK1 interaction with multiple receptor tyrosine kinases is mediated by Grb2: an analysis of ACK1 effects on Axl signaling. J Biol Chem. 2009 Dec 11;284(50):34954-63. doi: 10.1074/jbc.M109.072660. Epub, 2009 Oct 8. PMID:19815557 doi:10.1074/jbc.M109.072660
↑ Lowenstein EJ, Daly RJ, Batzer AG, Li W, Margolis B, Lammers R, Ullrich A, Skolnik EY, Bar-Sagi D, Schlessinger J. The SH2 and SH3 domain-containing protein GRB2 links receptor tyrosine kinases to ras signaling. Cell. 1992 Aug 7;70(3):431-42. PMID:1322798
↑ Fath I, Schweighoffer F, Rey I, Multon MC, Boiziau J, Duchesne M, Tocque B. Cloning of a Grb2 isoform with apoptotic properties. Science. 1994 May 13;264(5161):971-4. PMID:8178156
↑ Pao-Chun L, Chan PM, Chan W, Manser E. Cytoplasmic ACK1 interaction with multiple receptor tyrosine kinases is mediated by Grb2: an analysis of ACK1 effects on Axl signaling. J Biol Chem. 2009 Dec 11;284(50):34954-63. doi: 10.1074/jbc.M109.072660. Epub, 2009 Oct 8. PMID:19815557 doi:10.1074/jbc.M109.072660
↑ Hosoe Y, Numoto N, Inaba S, Ogawa S, Morii H, Abe R, Ito N, Oda M. Structural and functional properties of Grb2 SH2 dimer in CD28 binding. Biophys Physicobiol. 2019 Feb 22;16:80-88. doi: 10.2142/biophysico.16.0_80., eCollection 2019. PMID:30923665 doi:http://dx.doi.org/10.2142/biophysico.16.0_80

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 See Also
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/6icg"

@@ Line 3: / Line 3: @@
 <StructureSection load='6icg' size='340' side='right'caption='[[6icg]], [[Resolution|resolution]] 1.15&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[6icg]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6ICG OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6ICG FirstGlance]. <br>
+<table><tr><td colspan='2'>[[6icg]] is a 2 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=6ICG OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6ICG FirstGlance]. <br>
-</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></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]] 1.15&#8491;</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=6icg FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6icg OCA], [http://pdbe.org/6icg PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6icg RCSB], [http://www.ebi.ac.uk/pdbsum/6icg PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6icg ProSAT]</span></td></tr>
+<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</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=6icg FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6icg OCA], [https://pdbe.org/6icg PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6icg RCSB], [https://www.ebi.ac.uk/pdbsum/6icg PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6icg ProSAT]</span></td></tr>
 </table>
 == Function ==
-[[http://www.uniprot.org/uniprot/GRB2_HUMAN GRB2_HUMAN]] Adapter protein that provides a critical link between cell surface growth factor receptors and the Ras signaling pathway.<ref>PMID:1322798</ref> <ref>PMID:8178156</ref> <ref>PMID:19815557</ref>   Isoform 2 does not bind to phosphorylated epidermal growth factor receptor (EGFR) but inhibits EGF-induced transactivation of a RAS-responsive element. Isoform 2 acts as a dominant negative protein over GRB2 and by suppressing proliferative signals, may trigger active programmed cell death.<ref>PMID:1322798</ref> <ref>PMID:8178156</ref> <ref>PMID:19815557</ref>
+[https://www.uniprot.org/uniprot/GRB2_HUMAN GRB2_HUMAN] Adapter protein that provides a critical link between cell surface growth factor receptors and the Ras signaling pathway.<ref>PMID:1322798</ref> <ref>PMID:8178156</ref> <ref>PMID:19815557</ref>   Isoform 2 does not bind to phosphorylated epidermal growth factor receptor (EGFR) but inhibits EGF-induced transactivation of a RAS-responsive element. Isoform 2 acts as a dominant negative protein over GRB2 and by suppressing proliferative signals, may trigger active programmed cell death.<ref>PMID:1322798</ref> <ref>PMID:8178156</ref> <ref>PMID:19815557</ref>
 <div style="background-color:#fffaf0;">
 == Publication Abstract from PubMed ==
@@ Line 18: / Line 19: @@
 </div>
 <div class="pdbe-citations 6icg" style="background-color:#fffaf0;"></div>
+==See Also==
+*[[Growth factor receptor-bound proteins 3D structures|Growth factor receptor-bound proteins 3D structures]]
 == References ==
 <references/>
 __TOC__
 </StructureSection>
+[[Category: Homo sapiens]]
 [[Category: Large Structures]]
-[[Category: Abe, R]]
+[[Category: Abe R]]
-[[Category: Hosoe, Y]]
+[[Category: Hosoe Y]]
-[[Category: Inaba, S]]
+[[Category: Inaba S]]
-[[Category: Ito, N]]
+[[Category: Ito N]]
-[[Category: Morii, H]]
+[[Category: Morii H]]
-[[Category: Numoto, N]]
+[[Category: Numoto N]]
-[[Category: Oda, M]]
+[[Category: Oda M]]
-[[Category: Ogawa, S]]
+[[Category: Ogawa S]]
-[[Category: Adapter protein]]
-[[Category: Phosphorylated tyrosine]]
-[[Category: Signaling protein]]
-[[Category: Src homology 2 domain]]

6icg

From Proteopedia

Current revision

Grb2 SH2 domain in phosphopeptide free form

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox