1p6p
From Proteopedia
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| - | [[Image:1p6p.jpg|left|200px]] | + | [[Image:1p6p.jpg|left|200px]] |
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| - | '''Crystal Structure of Toad Liver Basic Fatty Acid-Binding Protein''' | + | {{Structure |
| + | |PDB= 1p6p |SIZE=350|CAPTION= <scene name='initialview01'>1p6p</scene>, resolution 2.5Å | ||
| + | |SITE= | ||
| + | |LIGAND= | ||
| + | |ACTIVITY= | ||
| + | |GENE= | ||
| + | }} | ||
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| + | '''Crystal Structure of Toad Liver Basic Fatty Acid-Binding Protein''' | ||
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==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1P6P is a [ | + | 1P6P is a [[Single protein]] structure of 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]. |
==Reference== | ==Reference== | ||
| - | 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:[http:// | + | 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:[http://www.ncbi.nlm.nih.gov/pubmed/12846568 12846568] |
[[Category: Bufo arenarum]] | [[Category: Bufo arenarum]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
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[[Category: beta barrel]] | [[Category: beta barrel]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 13:20:37 2008'' |
Revision as of 11:20, 20 March 2008
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Crystal Structure of Toad Liver Basic Fatty Acid-Binding Protein
Overview
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.
About this Structure
1P6P is a Single protein structure of sequence from Bufo arenarum. Full crystallographic information is available from OCA.
Reference
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
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