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==CRYSTAL STRUCTURE OF A SINGLE B REPEAT UNIT (B1) OF COLLAGEN BINDING SURFACE PROTEIN (CNA) OF STAPHYLOCOCCUS AUREUS.==
==CRYSTAL STRUCTURE OF A SINGLE B REPEAT UNIT (B1) OF COLLAGEN BINDING SURFACE PROTEIN (CNA) OF STAPHYLOCOCCUS AUREUS.==
<StructureSection load='1d2o' size='340' side='right' caption='[[1d2o]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
<StructureSection load='1d2o' size='340' side='right'caption='[[1d2o]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[1d2o]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Staphylococcus_aureus Staphylococcus aureus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1D2O OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1D2O FirstGlance]. <br>
<table><tr><td colspan='2'>[[1d2o]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Staphylococcus_aureus Staphylococcus aureus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1D2O OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1D2O FirstGlance]. <br>
</td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1amx|1amx]], [[1d2p|1d2p]]</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]] 2&#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=1d2o FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1d2o OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1d2o RCSB], [http://www.ebi.ac.uk/pdbsum/1d2o PDBsum]</span></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=1d2o FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1d2o OCA], [https://pdbe.org/1d2o PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1d2o RCSB], [https://www.ebi.ac.uk/pdbsum/1d2o PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1d2o ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
[[http://www.uniprot.org/uniprot/CNA_STAAU CNA_STAAU]] Mediates attachment of staphylococcal cells to collagen-containing substrata.  
[https://www.uniprot.org/uniprot/CNA_STAAU CNA_STAAU] Mediates attachment of staphylococcal cells to collagen-containing substrata.
== Evolutionary Conservation ==
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
Check<jmol>
   <jmolCheckbox>
   <jmolCheckbox>
     <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/d2/1d2o_consurf.spt"</scriptWhenChecked>
     <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/d2/1d2o_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>
     <text>to colour the structure by Evolutionary Conservation</text>
   </jmolCheckbox>
   </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/chain_selection.php?pdb_ID=2ata ConSurf].
</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=1d2o ConSurf].
<div style="clear:both"></div>
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
BACKGORUND: The Staphylococcus aureus collagen-binding protein Cna mediates bacterial adherence to collagen. The primary sequence of Cna has a non-repetitive collagen-binding A region, followed by the repetitive B region. The B region has one to four 23 kDa repeat units (B(1)-B(4)), depending on the strain of origin. The affinity of the A region for collagen is independent of the B region. However, the B repeat units have been suggested to serve as a 'stalk' that projects the A region from the bacterial surface and thus facilitate bacterial adherence to collagen. To understand the biological role of these B-region repeats we determined their three-dimensional structure. RESULTS: B(1) has two domains (D(1) and D(2)) placed side-by-side. D(1) and D(2) have similar secondary structure and exhibit a unique fold that resembles but is the inverse of the immunoglobulin-like (IgG-like) domains. Comparison with similar immunoglobulin superfamily (IgSF) structures shows novel packing arrangements between the D(1) and D(2) domains. In the B(1)B(2) crystal structure, an omission of a single glycine residue in the D(2)-D(3) linker loop, compared to the D(1)-D(2) and D(3)-D(4) linker loops, resulted in projection of the D(3) and D(4) in a spatially new orientation. We also present a model for B(1)B(2)B(3)B(4). CONCLUSIONS: The B region of the Cna collagen adhesin has a novel fold that is reminiscent of but is inverse in nature to the IgG fold. This B region assembly could effectively provide the needed flexibility and stability for presenting the ligand binding A region away from the bacterial cell surface.
Novel fold and assembly of the repetitive B region of the Staphylococcus aureus collagen-binding surface protein.,Deivanayagam CC, Rich RL, Carson M, Owens RT, Danthuluri S, Bice T, Hook M, Narayana SV Structure. 2000 Jan 15;8(1):67-78. PMID:10673425<ref>PMID:10673425</ref>


From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
==See Also==
</div>
*[[Adhesin 3D structures|Adhesin 3D structures]]
== References ==
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Large Structures]]
[[Category: Staphylococcus aureus]]
[[Category: Staphylococcus aureus]]
[[Category: Deivanayagam, C C.S]]
[[Category: Deivanayagam CCS]]
[[Category: Hook, M]]
[[Category: Hook M]]
[[Category: Narayana, S V.L]]
[[Category: Narayana SVL]]
[[Category: Rich, R L]]
[[Category: Rich RL]]
[[Category: Beta sandwich]]
[[Category: Cna]]
[[Category: Collagen]]
[[Category: Igg]]
[[Category: Igsf]]
[[Category: Structural protein]]
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