1FDQ

CRYSTAL STRUCTURE OF HUMAN BRAIN FATTY ACID BINDING PROTEIN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.180 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Crystal structure and thermodynamic analysis of human brain fatty acid-binding protein.

Balendiran, G.K.Schnutgen, F.Scapin, G.Borchers, T.Xhong, N.Lim, K.Godbout, R.Spener, F.Sacchettini, J.C.

(2000) J Biol Chem 275: 27045-27054

  • DOI: https://doi.org/10.1074/jbc.M003001200
  • Primary Citation of Related Structures:  
    1FDQ, 1FE3

  • PubMed Abstract: 

    Expression of brain fatty acid-binding protein (B-FABP) is spatially and temporally correlated with neuronal differentiation during brain development. Isothermal titration calorimetry demonstrates that recombinant human B-FABP clearly exhibits high affinity for the polyunsaturated n-3 fatty acids alpha-linolenic acid, eicosapentaenoic acid, docosahexaenoic acid, and for monounsaturated n-9 oleic acid (K(d) from 28 to 53 nm) over polyunsaturated n-6 fatty acids, linoleic acid, and arachidonic acid (K(d) from 115 to 206 nm). B-FABP has low binding affinity for saturated long chain fatty acids. The three-dimensional structure of recombinant human B-FABP in complex with oleic acid shows that the oleic acid hydrocarbon tail assumes a "U-shaped" conformation, whereas in the complex with docosahexaenoic acid the hydrocarbon tail adopts a helical conformation. A comparison of the three-dimensional structures and binding properties of human B-FABP with other homologous FABPs, indicates that the binding specificity is in part the result of nonconserved amino acid Phe(104), which interacts with double bonds present in the lipid hydrocarbon tail. In this context, analysis of the primary and tertiary structures of human B-FABP provides a rationale for its high affinity and specificity for polyunsaturated fatty acids. The expression of B-FABP in glial cells and its high affinity for docosahexaenoic acid, which is known to be an important component of neuronal membranes, points toward a role for B-FABP in supplying brain abundant fatty acids to the developing neuron.


  • Organizational Affiliation

    Department of Biochemistry & Biophysics, Texas A&M University, College Station, Texas 77843-2128, USA. balendra@reddrum.tamu.edu


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
FATTY ACID-BINDING PROTEIN, BRAIN
A, B
131Homo sapiensMutation(s): 0 
Gene Names: FABP7BLBPFABPBMRG
UniProt & NIH Common Fund Data Resources
Find proteins for O15540 (Homo sapiens)
Explore O15540 
Go to UniProtKB:  O15540
PHAROS:  O15540
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO15540
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
HXA
Query on HXA

Download Ideal Coordinates CCD File 
C [auth A],
D [auth B]
DOCOSA-4,7,10,13,16,19-HEXAENOIC ACID
C22 H32 O2
MBMBGCFOFBJSGT-KUBAVDMBSA-N
Binding Affinity Annotations 
IDSourceBinding Affinity
HXA PDBBind:  1FDQ Kd: 53.4 (nM) from 1 assay(s)
Binding MOAD:  1FDQ Kd: 53.4 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.180 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 37.22α = 90
b = 87.93β = 113.4
c = 46.79γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
TNTrefinement
DENZOdata reduction
SCALEPACKdata scaling
X-PLORphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-07-25
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance