View source for 2zpy


==Crystal structure of the mouse radxin FERM domain complexed with the mouse CD44 cytoplasmic peptide==
<StructureSection load='2zpy' size='340' side='right' caption='[[2zpy]], [[Resolution|resolution]] 2.10&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2zpy]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Lk3_transgenic_mice Lk3 transgenic mice]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2ZPY OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2ZPY FirstGlance]. <br>
</td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1gc7|1gc7]], [[1j19|1j19]], [[2yvc|2yvc]], [[2ems|2ems]], [[2emt|2emt]], [[2d2q|2d2q]], [[1gc6|1gc6]], [[2d10|2d10]], [[2d11|2d11]], [[1isn|1isn]]</td></tr>
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">Rdx ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10090 LK3 transgenic mice])</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=2zpy FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2zpy OCA], [http://pdbe.org/2zpy PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2zpy RCSB], [http://www.ebi.ac.uk/pdbsum/2zpy PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2zpy ProSAT]</span></td></tr>
</table>
== Function ==
[[http://www.uniprot.org/uniprot/RADI_MOUSE RADI_MOUSE]] Probably plays a crucial role in the binding of the barbed end of actin filaments to the plasma membrane. [[http://www.uniprot.org/uniprot/CD44_MOUSE CD44_MOUSE]] Main cell surface receptor for hyaluronate. Adhesion to mucosal high endothelial venule and to types I and VI collagen. Probably involved in matrix adhesion, lymphocyte activation and lymph node homing. 
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/zp/2zpy_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</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=2zpy ConSurf].
<div style="clear:both"></div>
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== Publication Abstract from PubMed ==
CD44 is an important adhesion molecule that functions as the major hyaluronan receptor which mediates cell adhesion and migration in a variety of physiological and pathological processes. Although full activity of CD44 requires binding to ERM (ezrin/radixin/moesin) proteins, the CD44 cytoplasmic region, consisting of 72 amino acid residues, lacks the Motif-1 consensus sequence for ERM binding found in intercellular adhesion molecule (ICAM)-2 and other adhesion molecules of the immunoglobulin superfamily. Ultracentrifugation sedimentation studies and circular dichroism measurements revealed an extended monomeric form of the cytoplasmic peptide in solution. The crystal structure of the radixin FERM domain complexed with a CD44 cytoplasmic peptide reveals that the KKKLVIN sequence of the peptide forms a beta strand followed by a short loop structure that binds subdomain C of the FERM domain. Like Motif-1 binding, the CD44 beta strand binds the shallow groove between strand beta5C and helix alpha1C and augments the beta sheet beta5C-beta7C from subdomain C. Two hydrophobic CD44 residues, Leu and Ile, are docked into a hydrophobic pocket with the formation of hydrogen bonds between Asn of the CD44 short loop and loop beta4C-beta5C from subdomain C. This binding mode resembles that of NEP (neutral endopeptidase 24.11) rather than ICAM-2. Our results reveal a characteristic versatility of peptide recognition by the FERM domains from ERM proteins, suggest a possible mechanism by which the CD44 tail is released from the cytoskeleton for nuclear translocation by regulated intramembrane proteolysis, and provide a structural basis for Smad1 interactions with activated CD44 bound to ERM protein.

Structural basis for CD44 recognition by ERM proteins.,Mori T, Kitano K, Terawaki S, Maesaki R, Fukami Y, Hakoshima T J Biol Chem. 2008 Oct 24;283(43):29602-12. Epub 2008 Aug 27. PMID:18753140<ref>PMID:18753140</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 2zpy" style="background-color:#fffaf0;"></div>

==See Also==
*[[Radixin|Radixin]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Lk3 transgenic mice]]
[[Category: Fukami, Y]]
[[Category: Hakoshima, T]]
[[Category: Kitano, K]]
[[Category: Maesaki, R]]
[[Category: Mori, T]]
[[Category: Terawaki, S]]
[[Category: Actin capping]]
[[Category: Actin-binding]]
[[Category: Alternative splicing]]
[[Category: Cd44]]
[[Category: Cell adhesion]]
[[Category: Cell membrane]]
[[Category: Cytoplasm]]
[[Category: Cytoskeleton]]
[[Category: Ferm domain]]
[[Category: Glycoprotein]]
[[Category: Membrane]]
[[Category: Phosphoprotein]]
[[Category: Proteoglycan]]
[[Category: Pyrrolidone carboxylic acid]]
[[Category: Receptor]]
[[Category: Structural protein]]
[[Category: Sulfation]]
[[Category: Transmembrane]]