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1xrd

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Revision as of 12:49, 11 September 2015

Light-Harvesting Complex 1 Alfa Subunit from Wild-Type Rhodospirillum rubrum

Structural highlights

1xrd is a 1 chain structure with sequence from Rhodospirillum rubrum. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance.
Related:	1wrg
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum

Function

[LHA_RHORU] Antenna complexes are light-harvesting systems, which transfer the excitation energy to the reaction centers.

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

We have determined the solution structures of the core light-harvesting (LH1) alpha and beta-polypeptides from wild-type purple photosynthetic bacterium Rhodospirillum rubrum using multidimensional NMR spectroscopy. The two polypeptides form stable alpha helices in organic solution. The structure of alpha-polypeptide consists of a long helix of 32 amino acid residues over the central transmembrane domain and a short helical segment at the N terminus that is followed by a three-residue loop. Pigment-coordinating histidine residue (His29) in the alpha-polypeptide is located near the middle of the central helix. The structure of beta-polypeptide shows a single helix of 32 amino acid residues in the membrane-spanning region with the pigment-coordinating histidine residue (His38) at a position close to the C-terminal end of the helix. Strong hydrogen bonds have been identified for the backbone amide protons over the central helical regions, indicating a rigid property of the two polypeptides. The overall structures of the R.rubrum LH1 alpha and beta-polypeptides are different from those previously reported for the LH1 beta-polypeptide of Rhodobacter sphaeroides, but are very similar to the structures of the corresponding LH2 alpha and beta-polypeptides determined by X-ray crystallography. A model constructed for the structural subunit (B820) of LH1 complex using the solution structures reveals several important features on the interactions between the LH1 alpha and beta-polypeptides. The significance of the N-terminal regions of the two polypeptides for stabilizing both B820 and LH1 complexes, as clarified by many experiments, may be attributed to the interactions between the short N-terminal helix (Trp2-Gln6) of alpha-polypeptide and a GxxxG motif in the beta-polypeptide.

Solution structures of the core light-harvesting alpha and beta polypeptides from Rhodospirillum rubrum: implications for the pigment-protein and protein-protein interactions.,Wang ZY, Gokan K, Kobayashi M, Nozawa T J Mol Biol. 2005 Mar 25;347(2):465-77. Epub 2005 Jan 25. PMID:15740753^[1]

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

References

↑ Wang ZY, Gokan K, Kobayashi M, Nozawa T. Solution structures of the core light-harvesting alpha and beta polypeptides from Rhodospirillum rubrum: implications for the pigment-protein and protein-protein interactions. J Mol Biol. 2005 Mar 25;347(2):465-77. Epub 2005 Jan 25. PMID:15740753 doi:10.1016/j.jmb.2005.01.017

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1xrd"

@@ Line 4: / Line 4: @@
 <table><tr><td colspan='2'>[[1xrd]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Rhodospirillum_rubrum Rhodospirillum rubrum]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1XRD OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1XRD FirstGlance]. <br>
 </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1wrg|1wrg]]</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=1xrd FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1xrd OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1xrd RCSB], [http://www.ebi.ac.uk/pdbsum/1xrd PDBsum]</span></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=1xrd FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1xrd OCA], [http://pdbe.org/1xrd PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1xrd RCSB], [http://www.ebi.ac.uk/pdbsum/1xrd PDBsum]</span></td></tr>
 </table>
 == Function ==
@@ Line 26: / Line 26: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 1xrd" style="background-color:#fffaf0;"></div>
 == References ==
 <references/>

1xrd

From Proteopedia

Revision as of 12:49, 11 September 2015

Light-Harvesting Complex 1 Alfa Subunit from Wild-Type Rhodospirillum rubrum

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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