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1erb

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Revision as of 07:05, 10 September 2015

THE INTERACTION OF N-ETHYL RETINAMIDE WITH PLASMA RETINOL-BINDING PROTEIN (RBP) AND THE CRYSTAL STRUCTURE OF THE RETINOID-RBP COMPLEX AT 1.9 ANGSTROMS RESOLUTION

Structural highlights

1erb is a 1 chain structure with sequence from Bovin. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum

Function

[RET4_BOVIN] Delivers retinol from the liver stores to the peripheral tissues. In plasma, the RBP-retinol complex interacts with transthyretin, this prevents its loss by filtration through the kidney glomeruli.

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 three-dimensional structure of bovine plasma retinol-binding protein (RBP) complexed with N-ethyl retinamide has been determined at 1.9-A resolution. The crystals of the complex (space group P2(1)2(1)2(1), a = 46.27, b = 49.11, c = 76.41 A) are isomorphous with those of bovine holo and apoRBP. The final crystallographic R factor is 0.172 for 11,261 observed reflections. The model of the retinoid-RBP complex is nearly identical to that of bovine retinol-RBP complex; the root mean square deviations between the alpha-carbons in the two proteins is 0.15 A. The N-ethyl retinamide molecule fits in the beta-barrel in the same position previously occupied by the vitamin. The ethyl group of the retinoid replaces the retinol hydroxyl group and a water molecule hydrogen bonded to it. This substitution has no consequence on the overall conformation of the protein. The modification of the functional end group of retinol does not lead to an apparent loss of affinity of the retinol analog for apoRBP, as established by means of fluorometric titrations with N-ethyl retinamide. However, the binding of the retinoid to RBP abolishes or greatly reduces the affinity of RBP for transthyretin. This behavior further supports the hypothesis that the area of the entrance of the beta-barrel, which includes the ethyl group of the retinoid bound to RBP, is involved in the interaction with transthyretin. Moreover, it indicates a high degree of complementarity of interacting surfaces between RBP and transthyretin. In fact, the replacement of the retinol hydroxyl group and quite small structural changes in the above region of the RBP molecule drastically affect the protein-protein recognition.

The interaction of N-ethyl retinamide with plasma retinol-binding protein (RBP) and the crystal structure of the retinoid-RBP complex at 1.9-A resolution.,Zanotti G, Malpeli G, Berni R J Biol Chem. 1993 Nov 25;268(33):24873-9. PMID:8227049^[1]

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

References

↑ Zanotti G, Malpeli G, Berni R. The interaction of N-ethyl retinamide with plasma retinol-binding protein (RBP) and the crystal structure of the retinoid-RBP complex at 1.9-A resolution. J Biol Chem. 1993 Nov 25;268(33):24873-9. PMID:8227049

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/1erb"

Categories: Bovin | Berni, R | Zanotti, G | Retinol transport

@@ Line 2: / Line 2: @@
 <StructureSection load='1erb' size='340' side='right' caption='[[1erb]], [[Resolution|resolution]] 1.90&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[1erb]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Bos_taurus Bos taurus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1ERB OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1ERB FirstGlance]. <br>
+<table><tr><td colspan='2'>[[1erb]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Bovin Bovin]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1ERB OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1ERB FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ETR:N-ETHYL+RETINAMIDE'>ETR</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=1erb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1erb OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1erb RCSB], [http://www.ebi.ac.uk/pdbsum/1erb 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=1erb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1erb OCA], [http://pdbe.org/1erb PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1erb RCSB], [http://www.ebi.ac.uk/pdbsum/1erb 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 1erb" style="background-color:#fffaf0;"></div>
 ==See Also==
@@ Line 33: / Line 34: @@
 __TOC__
 </StructureSection>
-[[Category: Bos taurus]]
+[[Category: Bovin]]
 [[Category: Berni, R]]
 [[Category: Zanotti, G]]
 [[Category: Retinol transport]]

1erb

From Proteopedia

Revision as of 07:05, 10 September 2015

THE INTERACTION OF N-ETHYL RETINAMIDE WITH PLASMA RETINOL-BINDING PROTEIN (RBP) AND THE CRYSTAL STRUCTURE OF THE RETINOID-RBP COMPLEX AT 1.9 ANGSTROMS RESOLUTION

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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