This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.

Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.

1yu1

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Revision as of 06:53, 25 April 2018

Major Tropism Determinant P3c Variant

Structural highlights

1yu1 is a 1 chain structure with sequence from Bpbpp. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Related:	1yu0, 1yu2, 1yu3
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[Q775D6_BPBPP] Tail fiber protein located at the distal ends of the fibers that binds to the adhesion receptors on the host surface, thereby determining the host range. The phage can alter its tropism by modifying this protein. Variants are expressed through a diversity-generating retroelement (DGR) that creates mutant copies of a template repeat and replaces the end of the tail fiber receptor-binding protein with these sequences, thus changing the host range. Milliards of variants of the fiber receptor-binding protein can be created with this system.^[1]

Publication Abstract from PubMed

Only few instances are known of protein folds that tolerate massive sequence variation for the sake of binding diversity. The most extensively characterized is the immunoglobulin fold. We now add to this the C-type lectin (CLec) fold, as found in the major tropism determinant (Mtd), a retroelement-encoded receptor-binding protein of Bordetella bacteriophage. Variation in Mtd, with its approximately 10(13) possible sequences, enables phage adaptation to Bordetella spp. Mtd is an intertwined, pyramid-shaped trimer, with variable residues organized by its CLec fold into discrete receptor-binding sites. The CLec fold provides a highly static scaffold for combinatorial display of variable residues, probably reflecting a different evolutionary solution for balancing diversity against stability from that in the immunoglobulin fold. Mtd variants are biased toward the receptor pertactin, and there is evidence that the CLec fold is used broadly for sequence variation by related retroelements.

The C-type lectin fold as an evolutionary solution for massive sequence variation.,McMahon SA, Miller JL, Lawton JA, Kerkow DE, Hodes A, Marti-Renom MA, Doulatov S, Narayanan E, Sali A, Miller JF, Ghosh P Nat Struct Mol Biol. 2005 Oct;12(10):886-92. Epub 2005 Sep 18. PMID:16170324^[2]

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

References

↑ Doulatov S, Hodes A, Dai L, Mandhana N, Liu M, Deora R, Simons RW, Zimmerly S, Miller JF. Tropism switching in Bordetella bacteriophage defines a family of diversity-generating retroelements. Nature. 2004 Sep 23;431(7007):476-81. PMID:15386016 doi:http://dx.doi.org/10.1038/nature02833
↑ McMahon SA, Miller JL, Lawton JA, Kerkow DE, Hodes A, Marti-Renom MA, Doulatov S, Narayanan E, Sali A, Miller JF, Ghosh P. The C-type lectin fold as an evolutionary solution for massive sequence variation. Nat Struct Mol Biol. 2005 Oct;12(10):886-92. Epub 2005 Sep 18. PMID:16170324 doi:nsmb992

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1yu1"

@@ Line 1: / Line 1: @@
 ==Major Tropism Determinant P3c Variant==
 <StructureSection load='1yu1' size='340' side='right' caption='[[1yu1]], [[Resolution|resolution]] 2.07&Aring;' scene=''>
@@ Line 5: / Line 6: @@
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=MMC:METHYL+MERCURY+ION'>MMC</scene></td></tr>
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1yu0|1yu0]], [[1yu2|1yu2]], [[1yu3|1yu3]]</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=1yu1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1yu1 OCA], [http://pdbe.org/1yu1 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1yu1 RCSB], [http://www.ebi.ac.uk/pdbsum/1yu1 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=1yu1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1yu1 OCA], [http://pdbe.org/1yu1 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1yu1 RCSB], [http://www.ebi.ac.uk/pdbsum/1yu1 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1yu1 ProSAT]</span></td></tr>
 </table>
 == Function ==

1yu1

From Proteopedia

Revision as of 06:53, 25 April 2018

Major Tropism Determinant P3c Variant

Structural highlights

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox