View source for 1ifc


==REFINEMENT OF THE STRUCTURE OF RECOMBINANT RAT INTESTINAL FATTY ACID-BINDING APOPROTEIN AT 1.2 ANGSTROMS RESOLUTION==
<StructureSection load='1ifc' size='340' side='right' caption='[[1ifc]], [[Resolution|resolution]] 1.19&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1ifc]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1IFC OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1IFC FirstGlance]. <br>
</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=1ifc FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ifc OCA], [http://pdbe.org/1ifc PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1ifc RCSB], [http://www.ebi.ac.uk/pdbsum/1ifc PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1ifc ProSAT]</span></td></tr>
</table>
== Function ==
[[http://www.uniprot.org/uniprot/FABPI_RAT FABPI_RAT]] FABP are thought to play a role in the intracellular transport of long-chain fatty acids and their acyl-CoA esters. FABP2 is probably involved in triglyceride-rich lipoprotein synthesis. Binds saturated long-chain fatty acids with a high affinity, but binds with a lower affinity to unsaturated long-chain fatty acids. FABP2 may also help maintain energy homeostasis by functioning as a lipid sensor (By similarity). 
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/if/1ifc_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1ifc ConSurf].
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== Publication Abstract from PubMed ==
The three-dimensional structure of the 131-residue rat intestinal fatty acid-binding protein, without bound ligand (apoI-FABP), has been refined with x-ray diffraction data to a nominal resolution of 1.19 A. The final model has a conventional crystallographic R-factor of 16.9% for 34,290 unique reflections [a root mean square (r.m.s.) deviation for bond length of 0.012 A and a r.m.s. deviation of 2.368 degrees for bond angles]. Ninety-two residues are present as components of the protein's 10 anti-parallel beta-strands while 14 residues are part of its two short alpha-helices. The beta-strands and alpha-helices are organized into two nearly orthogonal beta-sheets. Particular attention has been placed in defining solvent structure and the structures of discretely disordered groups in this protein. Two hundred thirty-seven solvent molecules have been identified; 24 are located within apoI-FABP. The refined model includes alternate conformers for 228 protein atoms (109 main-chain, 119 side-chain) and 63 solvent molecules. We have found several aromatic side-chains with multiple conformations located near, or in, the protein's ligand binding site. This observation, along with the fact that these side-chains have a temperature factor that is relatively higher than that of other aromatic residues, suggests that they may be involved in the process of noncovalent binding of fatty acid. The absence of a true hydrophobic core in I-FABP suggests that its structural integrity may be maintained primarily by a hydrogen bonding network involving protein and solvent atoms.

Refinement of the structure of recombinant rat intestinal fatty acid-binding apoprotein at 1.2-A resolution.,Scapin G, Gordon JI, Sacchettini JC J Biol Chem. 1992 Feb 25;267(6):4253-69. PMID:1740465<ref>PMID:1740465</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 1ifc" style="background-color:#fffaf0;"></div>

==See Also==
*[[Fatty acid-binding protein|Fatty acid-binding protein]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Gordon, J I]]
[[Category: Sacchettini, J C]]
[[Category: Scapin, G]]
[[Category: Lipid-binding protein]]