2fid: Difference between revisions

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New page: left|200px<br /><applet load="2fid" size="450" color="white" frame="true" align="right" spinBox="true" caption="2fid, resolution 2.80Å" /> '''Crystal Structure of...
 
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[[Image:2fid.gif|left|200px]]<br /><applet load="2fid" size="450" color="white" frame="true" align="right" spinBox="true"
caption="2fid, resolution 2.80&Aring;" />
'''Crystal Structure of a Bovine Rabex-5 fragment complexed with ubiquitin'''<br />


==Overview==
==Crystal Structure of a Bovine Rabex-5 fragment complexed with ubiquitin==
Rabex-5 is an exchange factor for Rab5, a master regulator of endosomal, trafficking. Rabex-5 binds monoubiquitin, undergoes covalent, ubiquitination and contains an intrinsic ubiquitin ligase activity, all of, which require an N-terminal A20 zinc finger followed immediately by a, helix. The structure of the N-terminal portion of Rabex-5 bound to, ubiquitin at 2.5-A resolution shows that Rabex-5-ubiquitin interactions, occur at two sites. The first site is a new type of ubiquitin-binding, domain, an inverted ubiquitin-interacting motif, which binds with, approximately 29-microM affinity to the canonical Ile44 hydrophobic patch, on ubiquitin. The second is a diaromatic patch on the A20 zinc finger, which binds with approximately 22-microM affinity to a polar region, centered on Asp58 of ubiquitin. The A20 zinc-finger diaromatic patch, mediates ubiquitin-ligase activity by directly recruiting a, ubiquitin-loaded ubiquitin-conjugating enzyme.
<StructureSection load='2fid' size='340' side='right'caption='[[2fid]], [[Resolution|resolution]] 2.80&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2fid]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Bos_taurus Bos taurus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2FID OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2FID 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]] 2.8&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ZN:ZINC+ION'>ZN</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=2fid FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2fid OCA], [https://pdbe.org/2fid PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2fid RCSB], [https://www.ebi.ac.uk/pdbsum/2fid PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2fid ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/UBC_BOVIN UBC_BOVIN] Ubiquitin: Exists either covalently attached to another protein, or free (unanchored). When covalently bound, it is conjugated to target proteins via an isopeptide bond either as a monomer (monoubiquitin), a polymer linked via different Lys residues of the ubiquitin (polyubiquitin chains) or a linear polymer linked via the initiator Met of the ubiquitin (linear polyubiquitin chains). Polyubiquitin chains, when attached to a target protein, have different functions depending on the Lys residue of the ubiquitin that is linked: Lys-6-linked may be involved in DNA repair; Lys-11-linked is involved in ERAD (endoplasmic reticulum-associated degradation) and in cell-cycle regulation; Lys-29-linked is involved in lysosomal degradation; Lys-33-linked is involved in kinase modification; Lys-48-linked is involved in protein degradation via the proteasome; Lys-63-linked is involved in endocytosis, DNA-damage responses as well as in signaling processes leading to activation of the transcription factor NF-kappa-B. Linear polymer chains formed via attachment by the initiator Met lead to cell signaling. Ubiquitin is usually conjugated to Lys residues of target proteins, however, in rare cases, conjugation to Cys or Ser residues has been observed. When polyubiquitin is free (unanchored-polyubiquitin), it also has distinct roles, such as in activation of protein kinases, and in signaling (By similarity).
== 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/fi/2fid_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=2fid ConSurf].
<div style="clear:both"></div>


==About this Structure==
==See Also==
2FID is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/Bos_taurus Bos taurus] with ZN as [http://en.wikipedia.org/wiki/ligand ligand]. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=2FID OCA].
*[[Rab5 GDP/GTP exchange factor|Rab5 GDP/GTP exchange factor]]
 
*[[3D structures of ubiquitin|3D structures of ubiquitin]]
==Reference==
__TOC__
Structural basis for ubiquitin recognition and autoubiquitination by Rabex-5., Lee S, Tsai YC, Mattera R, Smith WJ, Kostelansky MS, Weissman AM, Bonifacino JS, Hurley JH, Nat Struct Mol Biol. 2006 Mar;13(3):264-71. Epub 2006 Feb 5. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=16462746 16462746]
</StructureSection>
[[Category: Bos taurus]]
[[Category: Bos taurus]]
[[Category: Protein complex]]
[[Category: Large Structures]]
[[Category: Hurley, J.H.]]
[[Category: Hurley JH]]
[[Category: Lee, S.]]
[[Category: Lee S]]
[[Category: ZN]]
[[Category: helix]]
[[Category: zinc finger]]
 
''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Wed Nov 21 10:34:21 2007''

Latest revision as of 12:23, 14 February 2024

Crystal Structure of a Bovine Rabex-5 fragment complexed with ubiquitinCrystal Structure of a Bovine Rabex-5 fragment complexed with ubiquitin

Structural highlights

2fid is a 2 chain structure with sequence from Bos taurus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 2.8Å
Ligands:
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

UBC_BOVIN Ubiquitin: Exists either covalently attached to another protein, or free (unanchored). When covalently bound, it is conjugated to target proteins via an isopeptide bond either as a monomer (monoubiquitin), a polymer linked via different Lys residues of the ubiquitin (polyubiquitin chains) or a linear polymer linked via the initiator Met of the ubiquitin (linear polyubiquitin chains). Polyubiquitin chains, when attached to a target protein, have different functions depending on the Lys residue of the ubiquitin that is linked: Lys-6-linked may be involved in DNA repair; Lys-11-linked is involved in ERAD (endoplasmic reticulum-associated degradation) and in cell-cycle regulation; Lys-29-linked is involved in lysosomal degradation; Lys-33-linked is involved in kinase modification; Lys-48-linked is involved in protein degradation via the proteasome; Lys-63-linked is involved in endocytosis, DNA-damage responses as well as in signaling processes leading to activation of the transcription factor NF-kappa-B. Linear polymer chains formed via attachment by the initiator Met lead to cell signaling. Ubiquitin is usually conjugated to Lys residues of target proteins, however, in rare cases, conjugation to Cys or Ser residues has been observed. When polyubiquitin is free (unanchored-polyubiquitin), it also has distinct roles, such as in activation of protein kinases, and in signaling (By similarity).

Evolutionary Conservation

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

See Also

2fid, resolution 2.80Å

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