1i6b

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(Difference between revisions)

Revision as of 03:02, 11 September 2015

STRUCTURE OF EQUINE APOLACTOFERRIN AT 3.2 A RESOLUTION USING CRYSTALS GROWN AT 303K

Structural highlights

1i6b is a 1 chain structure with sequence from Equus caballus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Related:	1i6q
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum

Function

[TRFL_HORSE] Transferrins are iron binding transport proteins which can bind two Fe(3+) ions in association with the binding of an anion, usually bicarbonate. The lactotransferrin transferrin-like domain 1 functions as a serine protease of the peptidase S60 family that cuts arginine rich regions. This function contributes to the antimicrobial activity (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

Lactoferrin is an iron-binding protein. In the iron-bound state, the two domains of each lobe are invariably closed over an Fe(3+) ion. On the other hand, the structures of iron-free forms of lactoferrins from various species show different domain orientations. In order to determine the effects of external conditions such as pH, temperature and the presence of other additive agents on the crystal packing and consequently the influence of crystal packing forces on the final conformations of the two lobes of apolactoferrin, the structure of equine apolactoferrin has been determined at 303 K. The equine apolactoferrin was crystallized at 303 K using a microdialysis setup in which the concentration of protein was kept at 70 mg ml(-1) in 0.025 M Tris-HCl pH 8.0 with a reservoir containing 19% ethanol in the same buffer. The structure has been determined by molecular replacement using equine diferric lactoferrin as a model and was refined to an R factor of 0.23. The value of the overall B factor in the present structure is 81.3 A(2). The overall structure of the protein is similar to its earlier structure based on crystals grown at 277 K as well as that of diferric equine lactoferrin. The N and C lobes have been found to be slightly differently oriented (4.9 and 7.1 degrees, respectively) compared with the structures of equine diferric lactoferrin and apolactoferrin analyzed at 277 K, but the domain orientations in the two structures are identical as they remain closed over the empty iron-binding cleft. Overall, the structures of equine diferric lactoferrin, equine apolactoferrin at 277 K and the present structure of equine apolactoferrin at 303 K display identical domain orientations, suggesting that variation in the temperature of crystal growth, data collection and the processes of iron binding and iron release do not influence the arrangements of domains in equine lactoferrin.

Crystal structure of equine apolactoferrin at 303 K providing further evidence of closed conformations of N and C lobes.,Kumar P, Khan JA, Yadav S, Singh TP Acta Crystallogr D Biol Crystallogr. 2002 Feb;58(Pt 2):225-32. Epub 2002, Jan 24. PMID:11807246^[1]

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

References

↑ Kumar P, Khan JA, Yadav S, Singh TP. Crystal structure of equine apolactoferrin at 303 K providing further evidence of closed conformations of N and C lobes. Acta Crystallogr D Biol Crystallogr. 2002 Feb;58(Pt 2):225-32. Epub 2002, Jan 24. PMID:11807246

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/1i6b"

@@ Line 4: / Line 4: @@
 <table><tr><td colspan='2'>[[1i6b]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Equus_caballus Equus caballus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1I6B OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1I6B FirstGlance]. <br>
 </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1i6q|1i6q]]</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=1i6b FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1i6b OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1i6b RCSB], [http://www.ebi.ac.uk/pdbsum/1i6b 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=1i6b FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1i6b OCA], [http://pdbe.org/1i6b PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1i6b RCSB], [http://www.ebi.ac.uk/pdbsum/1i6b 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 1i6b" style="background-color:#fffaf0;"></div>
 ==See Also==

1i6b

From Proteopedia

Revision as of 03:02, 11 September 2015

STRUCTURE OF EQUINE APOLACTOFERRIN AT 3.2 A RESOLUTION USING CRYSTALS GROWN AT 303K

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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