1p6p

<StructureSection load='1p6p' size='340' side='right' caption='[[1p6p]], [[Resolution|resolution]] 2.50&Aring;' scene=''>

<table><tr><td colspan='2'>[[1p6p]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Bufo_arenarum Bufo arenarum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1P6P OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1P6P 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=1p6p FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1p6p OCA], [http://pdbe.org/1p6p PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1p6p RCSB], [http://www.ebi.ac.uk/pdbsum/1p6p PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1p6p ProSAT]</span></td></tr>

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== Publication Abstract from PubMed ==

Two paralogous groups of fatty acid-binding proteins (FABPs) have been described in vertebrate liver: liver FABP (L-FABP) type, extensively characterized in mammals, and liver basic FABP (Lb-FABP) found in fish, amphibians, reptiles, and birds. We describe here the toad Lb-FABP complete amino acid sequence, its X-ray structure to 2.5 A resolution, ligand-binding properties, and mechanism of fatty acid transfer to phospholipid membranes. Alignment of the amino acid sequence of toad Lb-FABP with known L-FABPs and Lb-FABPs shows that it is more closely related to the other Lb-FABPs. Toad Lb-FABP conserves the 12 characteristic residues present in all Lb-FABPs and absent in L-FABPs and presents the canonical fold characteristic of all the members of this protein family. Eight out of the 12 conserved residues point to the lipid-binding cavity of the molecule. In contrast, most of the 25 L-FABP conserved residues are in clusters on the surface of the molecule. The helix-turn-helix motif shows both a negative and positive electrostatic potential surface as in rat L-FABP, and in contrast with the other FABP types. The mechanism of anthroyloxy-labeled fatty acids transfer from Lb-FABP to phospholipid membranes occurs by a diffusion-mediated process, as previously shown for L-FABP, but the rate of transfer is 1 order of magnitude faster. Toad Lb-FABP can bind two cis-parinaric acid molecules but only one trans-parinaric acid molecule while L-FABP binds two molecules of both parinaric acid isomers. Although toad Lb-FABP shares with L-FABP a broad ligand-binding specificity, the relative affinity is different.

Structural and biochemical characterization of toad liver fatty acid-binding protein.,Di Pietro SM, Corsico B, Perduca M, Monaco HL, Santome JA Biochemistry. 2003 Jul 15;42(27):8192-203. PMID:12846568<ref>PMID:12846568</ref>

 

[[Category: Bufo arenarum]]

[[Category: Corsico, B]]

[[Category: Monaco, H L]]

[[Category: Perduca, M]]

[[Category: Pietro, S M.Di]]

[[Category: Santome, J A]]

[[Category: Beta barrel]]

[[Category: Lipid binding protein]]