1u2h

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[[Image:1u2h.gif|left|200px]]
 
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{{Structure
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==X-ray Structure of the N-terminally truncated human APEP-1==
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|PDB= 1u2h |SIZE=350|CAPTION= <scene name='initialview01'>1u2h</scene>, resolution 0.96&Aring;
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<StructureSection load='1u2h' size='340' side='right'caption='[[1u2h]], [[Resolution|resolution]] 0.96&Aring;' scene=''>
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|SITE=
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== Structural highlights ==
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|LIGAND=
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<table><tr><td colspan='2'>[[1u2h]] 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=1U2H OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1U2H FirstGlance]. <br>
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|ACTIVITY=
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 0.96&#8491;</td></tr>
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|GENE= Arotic Preferentially Expressed Gene 1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens])
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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=1u2h FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1u2h OCA], [https://pdbe.org/1u2h PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1u2h RCSB], [https://www.ebi.ac.uk/pdbsum/1u2h PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1u2h ProSAT]</span></td></tr>
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|DOMAIN=
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</table>
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|RELATEDENTRY=
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== Disease ==
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1u2h FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1u2h OCA], [http://www.ebi.ac.uk/pdbsum/1u2h PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1u2h RCSB]</span>
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[https://www.uniprot.org/uniprot/SPEG_HUMAN SPEG_HUMAN] Autosomal recessive centronuclear myopathy. The disease is caused by mutations affecting the gene represented in this entry.
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}}
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== Function ==
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[https://www.uniprot.org/uniprot/SPEG_HUMAN SPEG_HUMAN] Isoform 3 may have a role in regulating the growth and differentiation of arterial smooth muscle cells.
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'''X-ray Structure of the N-terminally truncated human APEP-1'''
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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==Overview==
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/u2/1u2h_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1u2h ConSurf].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
BACKGROUND: Human Aortic Preferentially Expressed Protein-1 (APEG-1) is a novel specific smooth muscle differentiation marker thought to play a role in the growth and differentiation of arterial smooth muscle cells (SMCs). RESULTS: Good quality crystals that were suitable for X-ray crystallographic studies were obtained following the truncation of the 14 N-terminal amino acids of APEG-1, a region predicted to be disordered. The truncated protein (termed DeltaAPEG-1) consists of a single immunoglobulin (Ig) like domain which includes an Arg-Gly-Asp (RGD) adhesion recognition motif. The RGD motif is crucial for the interaction of extracellular proteins and plays a role in cell adhesion. The X-ray structure of DeltaAPEG-1 was determined and was refined to sub-atomic resolution (0.96 A). This is the best resolution for an immunoglobulin domain structure so far. The structure adopts a Greek-key beta-sandwich fold and belongs to the I (intermediate) set of the immunoglobulin superfamily. The residues lying between the beta-sheets form a hydrophobic core. The RGD motif folds into a 310 helix that is involved in the formation of a homodimer in the crystal which is mainly stabilized by salt bridges. Analytical ultracentrifugation studies revealed a moderate dissociation constant of 20 microM at physiological ionic strength, suggesting that APEG-1 dimerisation is only transient in the cell. The binding constant is strongly dependent on ionic strength. CONCLUSION: Our data suggests that the RGD motif might play a role not only in the adhesion of extracellular proteins but also in intracellular protein-protein interactions. However, it remains to be established whether the rather weak dimerisation of APEG-1 involving this motif is physiologically relevant.
BACKGROUND: Human Aortic Preferentially Expressed Protein-1 (APEG-1) is a novel specific smooth muscle differentiation marker thought to play a role in the growth and differentiation of arterial smooth muscle cells (SMCs). RESULTS: Good quality crystals that were suitable for X-ray crystallographic studies were obtained following the truncation of the 14 N-terminal amino acids of APEG-1, a region predicted to be disordered. The truncated protein (termed DeltaAPEG-1) consists of a single immunoglobulin (Ig) like domain which includes an Arg-Gly-Asp (RGD) adhesion recognition motif. The RGD motif is crucial for the interaction of extracellular proteins and plays a role in cell adhesion. The X-ray structure of DeltaAPEG-1 was determined and was refined to sub-atomic resolution (0.96 A). This is the best resolution for an immunoglobulin domain structure so far. The structure adopts a Greek-key beta-sandwich fold and belongs to the I (intermediate) set of the immunoglobulin superfamily. The residues lying between the beta-sheets form a hydrophobic core. The RGD motif folds into a 310 helix that is involved in the formation of a homodimer in the crystal which is mainly stabilized by salt bridges. Analytical ultracentrifugation studies revealed a moderate dissociation constant of 20 microM at physiological ionic strength, suggesting that APEG-1 dimerisation is only transient in the cell. The binding constant is strongly dependent on ionic strength. CONCLUSION: Our data suggests that the RGD motif might play a role not only in the adhesion of extracellular proteins but also in intracellular protein-protein interactions. However, it remains to be established whether the rather weak dimerisation of APEG-1 involving this motif is physiologically relevant.
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==About this Structure==
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X-ray structure of engineered human Aortic Preferentially Expressed Protein-1 (APEG-1).,Manjasetty BA, Niesen FH, Scheich C, Roske Y, Goetz F, Behlke J, Sievert V, Heinemann U, Bussow K BMC Struct Biol. 2005 Dec 14;5:21. PMID:16354304<ref>PMID:16354304</ref>
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1U2H is a [[Single protein]] structure of 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=1U2H OCA].
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==Reference==
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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X-ray structure of engineered human Aortic Preferentially Expressed Protein-1 (APEG-1)., Manjasetty BA, Niesen FH, Scheich C, Roske Y, Goetz F, Behlke J, Sievert V, Heinemann U, Bussow K, BMC Struct Biol. 2005 Dec 14;5:21. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/16354304 16354304]
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</div>
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<div class="pdbe-citations 1u2h" style="background-color:#fffaf0;"></div>
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== References ==
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<references/>
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__TOC__
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</StructureSection>
[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
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[[Category: Single protein]]
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[[Category: Large Structures]]
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[[Category: Bussow, K.]]
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[[Category: Bussow K]]
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[[Category: Gotz, F.]]
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[[Category: Gotz F]]
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[[Category: Heinemann, U.]]
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[[Category: Heinemann U]]
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[[Category: Manjasetty, B A.]]
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[[Category: Manjasetty BA]]
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[[Category: Niesen, F H.]]
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[[Category: Niesen FH]]
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[[Category: Roske, Y.]]
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[[Category: Roske Y]]
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[[Category: Scheich, C.]]
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[[Category: Scheich C]]
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[[Category: arterial smooth muscle cell]]
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[[Category: atherosclerosis]]
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[[Category: homophilic adhesion]]
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[[Category: ig-fold i-set]]
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[[Category: rgd motif]]
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[[Category: structural genomic]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 00:04:28 2008''
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Current revision

X-ray Structure of the N-terminally truncated human APEP-1

PDB ID 1u2h

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