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1gvc

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Revision as of 05:32, 10 September 2015

18KDA N-II DOMAIN FRAGMENT OF DUCK OVOTRANSFERRIN + NTA

Structural highlights

1gvc is a 1 chain structure with sequence from Anas platyrhynchos. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, ,
Related:	1aov, 1dot, 1gv8, 1ovb
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum

Function

[TRFE_ANAPL] Transferrins are iron binding transport proteins which can bind two Fe(3+) ions in association with the binding of an anion, usually bicarbonate. It is responsible for the transport of iron from sites of absorption and heme degradation to those of storage and utilization. Serum transferrin may also have a further role in stimulating cell proliferation. Ovotransferrin has a bacteriostatic function. Its concentration in avian egg is the highest concentration of any transferrin in vivo (By similarity).

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

In a previous paper [Lindley et al. (1993), Acta Cryst. D49, 292-304], the X-ray structure analysis of the 18 kDa fragment of duck ovotransferrin, corresponding to the NII domain of the intact protein, was reported at a resolution of 2.3 A. In this structure, the Fe(III) cation binds to two tyrosine residues and the synergistic carbonate anion in an identical manner to that found in the intact protein. However, the aspartate and histidine residues, normally involved in iron binding in transferrins, are absent in the fragment and it was not possible to unequivocally define what had replaced them. The electron density was tentatively assigned to be a mixture of peptides, presumably resulting from the proteolytic preparation of the fragment, binding to the iron through their amino and carboxylate termini. A more recent X-ray analysis of the fragment, from a different preparation, has resulted in a structure at 1.95 A, in which glycine appears to be the predominant residue bound to the cation. In an alternative attempt to clarify the binding of iron to the 18 kDa fragment, the metal was removed by dialysis and replaced in the form of ferric nitrilotriacetate. Crystallization of this complex has resulted in an X-ray structure at 1.90 A in which the Fe(III) is bound to the synergistic carbonate anion and only one tyrosine residue in a manner almost identical to the intact protein. The carboxylate groups and the tertiary amino group of the nitrilotriacetate occupy the remaining coordination sites. The second tyrosine residue, Tyr95, is not bound directly to the iron. The implication of these structures with respect to the mechanism of iron binding by the transferrins is addressed.

The mechanism of iron uptake by transferrins: the X-ray structures of the 18 kDa NII domain fragment of duck ovotransferrin and its nitrilotriacetate complex.,Kuser P, Hall DR, Haw ML, Neu M, Evans RW, Lindley PF Acta Crystallogr D Biol Crystallogr. 2002 May;58(Pt 5):777-83. Epub 2002, Apr 26. PMID:11976488^[1]

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

References

↑ Kuser P, Hall DR, Haw ML, Neu M, Evans RW, Lindley PF. The mechanism of iron uptake by transferrins: the X-ray structures of the 18 kDa NII domain fragment of duck ovotransferrin and its nitrilotriacetate complex. Acta Crystallogr D Biol Crystallogr. 2002 May;58(Pt 5):777-83. Epub 2002, Apr 26. PMID:11976488

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

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

@@ Line 5: / Line 5: @@
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CO3:CARBONATE+ION'>CO3</scene>, <scene name='pdbligand=FE:FE+(III)+ION'>FE</scene>, <scene name='pdbligand=NTA:NITRILOTRIACETIC+ACID'>NTA</scene></td></tr>
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1aov|1aov]], [[1dot|1dot]], [[1gv8|1gv8]], [[1ovb|1ovb]]</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=1gvc FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1gvc OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1gvc RCSB], [http://www.ebi.ac.uk/pdbsum/1gvc 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=1gvc FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1gvc OCA], [http://pdbe.org/1gvc PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1gvc RCSB], [http://www.ebi.ac.uk/pdbsum/1gvc PDBsum]</span></td></tr>
 </table>
 == Function ==
@@ Line 27: / Line 27: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 1gvc" style="background-color:#fffaf0;"></div>
 ==See Also==

1gvc

From Proteopedia

Revision as of 05:32, 10 September 2015

18KDA N-II DOMAIN FRAGMENT OF DUCK OVOTRANSFERRIN + NTA

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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