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1b1x

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Revision as of 11:08, 22 November 2017

STRUCTURE OF DIFERRIC MARE LACTOFERRIN AT 2.62A RESOLUTION

Structural highlights

1b1x is a 1 chain structure with sequence from Equus caballus. This structure supersedes the now removed PDB entry 1bgr. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

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 a monomeric glycoprotein with a molecular mass of approximately 80 kDa. The three-dimensional structure of mare diferric lactoferrin (mlf) has been determined at 2.6 A resolution. The protein crystallizes in the space group P 212121with a=85.2 A, b=99.5 A, c=103.1 A with a solvent content of 55 % (v/v). The structure was solved by the molecular replacement method using human diferric lactoferrin as the model. The structure has been refined using XPLOR to a final R -factor of 0.194 for all data in the 15-2.6 A resolution range. The amino acid sequence of mlf was determined using a cDNA method. The final refined model comprises 5281 protein atoms, 2 Fe3+, 2 CO32-and 112 water molecules. The overall folding of mlf is similar to that of other proteins of the transferrin family. The protein folds into two globular lobes, N and C. The lobes are further divided into two domains, N1 and N2, and C1 and C2. The iron-binding cleft is situated between the domains in each lobe. The N lobe appears to be well ordered and is more stable than the C lobe in mlf unlike in other lactoferrins, where the C lobe is the more stable. The opening of the binding cleft in the N lobe of mlf is narrower than those in other proteins of the transferrin family. This is very unusual and is found only in mare lactoferrin. Apart from certain hydrophobic interactions at the mouth of the cleft, one salt-bridge (Lys301 . . . . . . . . Glu216) crosses between the two walls of the cleft. The two lobes are connected covalently by a three-turn alpha-helix involving residues 334-344. The N lobe displays a highly ordered structure with appreciably low temperature factors. The iron coordination is more symmetrical in the N lobe than in the C lobe. There are only 16 intermolecular hydrogen bonds in the structure of mlf.

Three-dimensional structure of mare diferric lactoferrin at 2.6 A resolution.,Sharma AK, Paramasivam M, Srinivasan A, Yadav MP, Singh TP J Mol Biol. 1999 Jun 4;289(2):303-17. PMID:10366507^[1]

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

References

↑ Sharma AK, Paramasivam M, Srinivasan A, Yadav MP, Singh TP. Three-dimensional structure of mare diferric lactoferrin at 2.6 A resolution. J Mol Biol. 1999 Jun 4;289(2):303-17. PMID:10366507 doi:http://dx.doi.org/10.1006/jmbi.1999.2767

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/1b1x"

@@ Line 1: / Line 1: @@
 ==STRUCTURE OF DIFERRIC MARE LACTOFERRIN AT 2.62A RESOLUTION==
 <StructureSection load='1b1x' size='340' side='right' caption='[[1b1x]], [[Resolution|resolution]] 2.62&Aring;' scene=''>
@@ Line 4: / Line 5: @@
 <table><tr><td colspan='2'>[[1b1x]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Equus_caballus Equus caballus]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=1bgr 1bgr]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1B1X OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1B1X FirstGlance]. <br>
 </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></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=1b1x FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1b1x OCA], [http://pdbe.org/1b1x PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1b1x RCSB], [http://www.ebi.ac.uk/pdbsum/1b1x 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=1b1x FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1b1x OCA], [http://pdbe.org/1b1x PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1b1x RCSB], [http://www.ebi.ac.uk/pdbsum/1b1x PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1b1x ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 27: / Line 28: @@
 </div>
 <div class="pdbe-citations 1b1x" style="background-color:#fffaf0;"></div>
-==See Also==
-*[[Lactoferrin|Lactoferrin]]
 == References ==
 <references/>

1b1x

From Proteopedia

Revision as of 11:08, 22 November 2017

STRUCTURE OF DIFERRIC MARE LACTOFERRIN AT 2.62A RESOLUTION

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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