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1lfi

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Revision as of 12:14, 13 November 2019

METAL SUBSTITUTION IN TRANSFERRINS: THE CRYSTAL STRUCTURE OF HUMAN COPPER-LACTOFERRIN AT 2.1 ANGSTROMS RESOLUTION

Structural highlights

1lfi is a 1 chain structure with sequence from Human. 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_HUMAN] Transferrins are iron binding transport proteins which can bind two Fe(3+) ions in association with the binding of an anion, usually bicarbonate.^[1] ^[2] Lactotransferrin has antimicrobial activity which depends on the extracellular cation concentration.^[3] ^[4] Lactoferroxins A, B and C have opioid antagonist activity. Lactoferroxin A shows preference for mu-receptors, while lactoferroxin B and C have somewhat higher degrees of preference for kappa-receptors than for mu-receptors.^[5] ^[6] 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.^[7] ^[8] Isoform DeltaLf: transcription factor with antiproliferative properties and inducing cell cycle arrest. Binds to DeltaLf response element found in the SKP1, BAX, DCPS, and SELH promoters.^[9] ^[10]

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

The structural consequences of binding a metal other than iron to a transferrin have been examined by crystallographic analysis of human copper-lactoferrin, Cu2Lf. X-ray diffraction data were collected from crystals of Cu2Lf, using a diffractometer, to 2.6-A resolution, and oscillation photography on a synchrotron source, to 2.1-A resolution. The structure was refined crystallographically, by restrained least-squares methods, starting with a model based on the isomorphous diferric structure from which the ligands, metal ions, anions, and solvent molecules had been deleted. The final model, comprising 5321 protein atoms (691 residues), 2 Cu2+ ions, 2 (bi)carbonate ions, and 308 solvent molecules has good stereochemistry (rms deviation of bond lengths from standard values of 0.018 A) and gives a crystallographic R value of 0.196 for 43,525 reflections in the range 7.5-2.1-A resolution. The copper coordination is different in the two binding sites. In the N-terminal site, the geometry is square pyramidal, with equatorial bonds to Asp 60, Tyr 192, His 253, and a monodentate anion and a longer apical bond to Tyr 92. In the C-terminal site, the geometry is distorted octahedral, with bonds to Asp 395, Tyr 435, Tyr 528, and His 597 and an asymmetrically bidentate anion. The protein structure is the same as for the diferric protein, Fe2Lf, demonstrating that the closure of the protein domains over the metal is the same in each case irrespective of whether Fe3+ or Cu2+ is bound and that copper could be transported and delivered to cells equally well as iron. The differences in metal coordination are achieved by small movements of the metal ion and anion within each binding site, which do not affect the protein structure.

Metal substitution in transferrins: the crystal structure of human copper-lactoferrin at 2.1-A resolution.,Smith CA, Anderson BF, Baker HM, Baker EN Biochemistry. 1992 May 12;31(18):4527-33. PMID:1581307^[11]

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

References

↑ Hendrixson DR, Qiu J, Shewry SC, Fink DL, Petty S, Baker EN, Plaut AG, St Geme JW 3rd. Human milk lactoferrin is a serine protease that cleaves Haemophilus surface proteins at arginine-rich sites. Mol Microbiol. 2003 Feb;47(3):607-17. PMID:12535064
↑ Mariller C, Hardiville S, Hoedt E, Huvent I, Pina-Canseco S, Pierce A. Delta-lactoferrin, an intracellular lactoferrin isoform that acts as a transcription factor. Biochem Cell Biol. 2012 Jun;90(3):307-19. doi: 10.1139/o11-070. Epub 2012 Feb 9. PMID:22320386 doi:http://dx.doi.org/10.1139/o11-070
↑ Hendrixson DR, Qiu J, Shewry SC, Fink DL, Petty S, Baker EN, Plaut AG, St Geme JW 3rd. Human milk lactoferrin is a serine protease that cleaves Haemophilus surface proteins at arginine-rich sites. Mol Microbiol. 2003 Feb;47(3):607-17. PMID:12535064
↑ Mariller C, Hardiville S, Hoedt E, Huvent I, Pina-Canseco S, Pierce A. Delta-lactoferrin, an intracellular lactoferrin isoform that acts as a transcription factor. Biochem Cell Biol. 2012 Jun;90(3):307-19. doi: 10.1139/o11-070. Epub 2012 Feb 9. PMID:22320386 doi:http://dx.doi.org/10.1139/o11-070
↑ Hendrixson DR, Qiu J, Shewry SC, Fink DL, Petty S, Baker EN, Plaut AG, St Geme JW 3rd. Human milk lactoferrin is a serine protease that cleaves Haemophilus surface proteins at arginine-rich sites. Mol Microbiol. 2003 Feb;47(3):607-17. PMID:12535064
↑ Mariller C, Hardiville S, Hoedt E, Huvent I, Pina-Canseco S, Pierce A. Delta-lactoferrin, an intracellular lactoferrin isoform that acts as a transcription factor. Biochem Cell Biol. 2012 Jun;90(3):307-19. doi: 10.1139/o11-070. Epub 2012 Feb 9. PMID:22320386 doi:http://dx.doi.org/10.1139/o11-070
↑ Hendrixson DR, Qiu J, Shewry SC, Fink DL, Petty S, Baker EN, Plaut AG, St Geme JW 3rd. Human milk lactoferrin is a serine protease that cleaves Haemophilus surface proteins at arginine-rich sites. Mol Microbiol. 2003 Feb;47(3):607-17. PMID:12535064
↑ Mariller C, Hardiville S, Hoedt E, Huvent I, Pina-Canseco S, Pierce A. Delta-lactoferrin, an intracellular lactoferrin isoform that acts as a transcription factor. Biochem Cell Biol. 2012 Jun;90(3):307-19. doi: 10.1139/o11-070. Epub 2012 Feb 9. PMID:22320386 doi:http://dx.doi.org/10.1139/o11-070
↑ Hendrixson DR, Qiu J, Shewry SC, Fink DL, Petty S, Baker EN, Plaut AG, St Geme JW 3rd. Human milk lactoferrin is a serine protease that cleaves Haemophilus surface proteins at arginine-rich sites. Mol Microbiol. 2003 Feb;47(3):607-17. PMID:12535064
↑ Mariller C, Hardiville S, Hoedt E, Huvent I, Pina-Canseco S, Pierce A. Delta-lactoferrin, an intracellular lactoferrin isoform that acts as a transcription factor. Biochem Cell Biol. 2012 Jun;90(3):307-19. doi: 10.1139/o11-070. Epub 2012 Feb 9. PMID:22320386 doi:http://dx.doi.org/10.1139/o11-070
↑ Smith CA, Anderson BF, Baker HM, Baker EN. Metal substitution in transferrins: the crystal structure of human copper-lactoferrin at 2.1-A resolution. Biochemistry. 1992 May 12;31(18):4527-33. PMID:1581307

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/1lfi"

@@ Line 1: / Line 1: @@
 ==METAL SUBSTITUTION IN TRANSFERRINS: THE CRYSTAL STRUCTURE OF HUMAN COPPER-LACTOFERRIN AT 2.1 ANGSTROMS RESOLUTION==
-<StructureSection load='1lfi' size='340' side='right' caption='[[1lfi]], [[Resolution|resolution]] 2.10&Aring;' scene=''>
+<StructureSection load='1lfi' size='340' side='right'caption='[[1lfi]], [[Resolution|resolution]] 2.10&Aring;' scene=''>
 == Structural highlights ==
 <table><tr><td colspan='2'>[[1lfi]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1LFI OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1LFI FirstGlance]. <br>
@@ Line 13: / Line 13: @@
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/lf/1lfi_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/lf/1lfi_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>
@@ Line 28: / Line 28: @@
 </div>
 <div class="pdbe-citations 1lfi" style="background-color:#fffaf0;"></div>
+==See Also==
+*[[Lactoferrin|Lactoferrin]]
 == References ==
 <references/>
@@ Line 33: / Line 36: @@
 </StructureSection>
 [[Category: Human]]
+[[Category: Large Structures]]
 [[Category: Anderson, B F]]
 [[Category: Baker, E N]]

1lfi

From Proteopedia

Revision as of 12:14, 13 November 2019

METAL SUBSTITUTION IN TRANSFERRINS: THE CRYSTAL STRUCTURE OF HUMAN COPPER-LACTOFERRIN AT 2.1 ANGSTROMS RESOLUTION

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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