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[[Image:2yvc.gif|left|200px]]<br /><applet load="2yvc" size="350" color="white" frame="true" align="right" spinBox="true"
caption="2yvc, resolution 3.20&Aring;" />
'''Crystal structure of the Radixin FERM domain complexed with the NEP cytoplasmic tail'''<br />


==Overview==
==Crystal structure of the Radixin FERM domain complexed with the NEP cytoplasmic tail==
Radixin is a member of the ezrin/radixin/moesin (ERM) family of proteins, which play a role in the formation of the membrane-associated cytoskeleton by linking actin filaments and adhesion proteins. This cross-linking activity is regulated by phosphoinositides such as phosphatidylinositol 4,5-bisphosphate (PIP2) in the downstream of the small G protein Rho. The X-ray crystal structures of the radixin FERM domain, which is responsible for membrane binding, and its complex with inositol-(1,4, 5)-trisphosphate (IP3) have been determined. The domain consists of three subdomains featuring a ubiquitin-like fold, a four-helix bundle and a phosphotyrosine-binding-like domain, respectively. These subdomains are organized by intimate interdomain interactions to form characteristic grooves and clefts. One such groove is negatively charged and so is thought to interact with basic juxta-membrane regions of adhesion proteins. IP3 binds a basic cleft that is distinct from those of pleckstrin homology domains and is located on a positively charged flat molecular surface, suggesting an electrostatic mechanism of plasma membrane targeting. Based on the structural changes associated with IP3 binding, a possible unmasking mechanism of ERM proteins by PIP2 is proposed.
<StructureSection load='2yvc' size='340' side='right'caption='[[2yvc]], [[Resolution|resolution]] 3.20&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2yvc]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2YVC OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2YVC FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 3.2&#8491;</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=2yvc FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2yvc OCA], [https://pdbe.org/2yvc PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2yvc RCSB], [https://www.ebi.ac.uk/pdbsum/2yvc PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2yvc ProSAT]</span></td></tr>
</table>
== Function ==
[https://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.
== 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/yv/2yvc_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=2yvc ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
ERM (Ezrin/Radixin/Moesin) proteins mediate formation of membrane-associated cytoskeletons by simultaneously binding actin filaments and the C-terminal cytoplasmic tails of adhesion molecules (type I membrane proteins). ERM proteins also bind neutral endopeptidase 24.11 (NEP), a type II membrane protein, even though the N-terminal cytoplasmic tail of NEP possesses the opposite peptide polarity to that of type I membrane proteins. Here, we determined the crystal structure of the radixin FERM (Four point one and ERM) domain complexed with the N-terminal NEP cytoplasmic peptide. In the FERM-NEP complex, the amphipathic region of the peptide forms a beta strand followed by a hairpin that bind to a shallow groove of FERM subdomain C. NEP binding is stabilized by beta-beta interactions and docking of the NEP hairpin into the hydrophobic pocket of subdomain C. Whereas the binding site of NEP on the FERM domain overlaps with the binding site of intercellular adhesion molecule (ICAM)-2, NEP lacks the Motif-1 sequence conserved in ICAM-2 and related adhesion molecules. The NEP hairpin, although lacking the typical inter-chain hydrogen bond but is stabilized by hydrogen bonds with the main chain and side chains of subdomain C, directs the C-terminal basic region of the NEP peptide away from the groove and toward the membrane. The overlap of the binding sites on subdomain C for NEP and Motif-1 adhesion molecules such as CD44 provides the structural basis for the suppression of cell adhesion through interaction between NEP and ERM proteins.


==About this Structure==
Structural basis for type II membrane protein binding by ERM proteins revealed by the radixin-neutral endopeptidase 24.11 (NEP) complex.,Terawaki S, Kitano K, Hakoshima T J Biol Chem. 2007 Jul 6;282(27):19854-62. Epub 2007 Apr 24. PMID:17459884<ref>PMID:17459884</ref>
2YVC is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2YVC OCA].


==Reference==
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
Structural basis of the membrane-targeting and unmasking mechanisms of the radixin FERM domain., Hamada K, Shimizu T, Matsui T, Tsukita S, Hakoshima T, EMBO J. 2000 Sep 1;19(17):4449-62. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=10970839 10970839]
</div>
<div class="pdbe-citations 2yvc" style="background-color:#fffaf0;"></div>
 
==See Also==
*[[Neprilysin|Neprilysin]]
*[[Radixin|Radixin]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Mus musculus]]
[[Category: Mus musculus]]
[[Category: Protein complex]]
[[Category: Hakoshima T]]
[[Category: Hakoshima, T.]]
[[Category: Kitano K]]
[[Category: Kitano, K.]]
[[Category: Terawaki S]]
[[Category: Terawaki, S.]]
[[Category: protein-peptide complex]]
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 18:58:10 2008''

Latest revision as of 12:05, 25 October 2023

Crystal structure of the Radixin FERM domain complexed with the NEP cytoplasmic tailCrystal structure of the Radixin FERM domain complexed with the NEP cytoplasmic tail

Structural highlights

2yvc is a 6 chain structure with sequence from Mus musculus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 3.2Å
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

RADI_MOUSE Probably plays a crucial role in the binding of the barbed end of actin filaments to the plasma membrane.

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

ERM (Ezrin/Radixin/Moesin) proteins mediate formation of membrane-associated cytoskeletons by simultaneously binding actin filaments and the C-terminal cytoplasmic tails of adhesion molecules (type I membrane proteins). ERM proteins also bind neutral endopeptidase 24.11 (NEP), a type II membrane protein, even though the N-terminal cytoplasmic tail of NEP possesses the opposite peptide polarity to that of type I membrane proteins. Here, we determined the crystal structure of the radixin FERM (Four point one and ERM) domain complexed with the N-terminal NEP cytoplasmic peptide. In the FERM-NEP complex, the amphipathic region of the peptide forms a beta strand followed by a hairpin that bind to a shallow groove of FERM subdomain C. NEP binding is stabilized by beta-beta interactions and docking of the NEP hairpin into the hydrophobic pocket of subdomain C. Whereas the binding site of NEP on the FERM domain overlaps with the binding site of intercellular adhesion molecule (ICAM)-2, NEP lacks the Motif-1 sequence conserved in ICAM-2 and related adhesion molecules. The NEP hairpin, although lacking the typical inter-chain hydrogen bond but is stabilized by hydrogen bonds with the main chain and side chains of subdomain C, directs the C-terminal basic region of the NEP peptide away from the groove and toward the membrane. The overlap of the binding sites on subdomain C for NEP and Motif-1 adhesion molecules such as CD44 provides the structural basis for the suppression of cell adhesion through interaction between NEP and ERM proteins.

Structural basis for type II membrane protein binding by ERM proteins revealed by the radixin-neutral endopeptidase 24.11 (NEP) complex.,Terawaki S, Kitano K, Hakoshima T J Biol Chem. 2007 Jul 6;282(27):19854-62. Epub 2007 Apr 24. PMID:17459884[1]

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

See Also

References

  1. Terawaki S, Kitano K, Hakoshima T. Structural basis for type II membrane protein binding by ERM proteins revealed by the radixin-neutral endopeptidase 24.11 (NEP) complex. J Biol Chem. 2007 Jul 6;282(27):19854-62. Epub 2007 Apr 24. PMID:17459884 doi:10.1074/jbc.M609232200

2yvc, resolution 3.20Å

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