university lille north of france LigASite database of binding sites
holo-structureHelp

PDB ID and HEADER, TITLE and COMPND records of the PDB file.

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1opb
RETINOL TRANSPORT HEADER
THE CRYSTAL STRUCTURES OF HOLO-AND APO-CELLULAR RETINOL BINDING PROTEIN II TITLE
CELLULAR RETINOL BINDING PROTEIN II COMPND
Illustration of Binding SiteHelp

Figure showing the binding site residues. Ligands are displayed as CPK. Figures were drawn with Molscript (7) and rendered with Raster3D (8). PISA coordinates (3) are used when available (all entries except NMR). Ligands do not appear on the picture when PISA fails to apply symmetry operations to ligand coordinates.

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HETgroup - Residue ContactsHelp

List of binding site residues detected in this holo-structure.

Column 1 gives the position, coloured on a yellow-to-red scale depending on the number of holo-structures where the residue is in contact with a ligand.
Column 2 gives the identifier of the chain to which the residue belongs.
Column 3 gives the 3-letter amino acid code, coloured according to physico-chemical type.

The binding residues in this holo structure are listed for each ligand independently, following the ligand's unique ID.

Note that since PISA files are used whenever available, chain identifiers may differ from those in original PDB files.

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RET D 134
16D PHE
19D TYR
23D LEU
25D ILE
29D THR
36D LEU
38D GLN
40D LYS
42D ILE
51D THR
53D THR
55D SER
57D PHE
60D TYR
64D PHE
76D GLY
77D LEU
106D TRP
108D GLN
117D LEU
119D LEU
128D GLN
RET C 134
16C PHE
19C TYR
23C LEU
25C ILE
29C THR
36C LEU
38C GLN
40C LYS
42C ILE
51C THR
53C THR
55C SER
57C PHE
60C TYR
64C PHE
76C GLY
77C LEU
106C TRP
108C GLN
117C LEU
119C LEU
128C GLN
RET B 134
16B PHE
19B TYR
23B LEU
25B ILE
29B THR
36B LEU
38B GLN
40B LYS
42B ILE
49B PHE
51B THR
53B THR
55B SER
57B PHE
60B TYR
64B PHE
76B GLY
77B LEU
106B TRP
108B GLN
117B LEU
119B LEU
128B GLN
RET A 134
16A PHE
19A TYR
23A LEU
25A ILE
29A THR
36A LEU
38A GLN
40A LYS
42A ILE
51A THR
53A THR
55A SER
57A PHE
60A TYR
64A PHE
76A GLY
77A LEU
106A TRP
108A GLN
117A LEU
119A LEU
128A GLN
External LinksHelp

PDB The Protein Data Bank
CSA Catalytic Site Atlas
PDBSum Overview of the macromolecular structure
CATH Protein Structure Classification
Scop Structural Classification of Proteins
Pfam Protein Families and Domains
UniProt Universal Protein Resource

LIGPLOT (only on holo-pages) is hosted at the EBI.

The LigPlot Jmol links point directly to the Jmol visualisation interface provided on the PDBSum page.

Note that due to different software used, the atomic contacts of LigPlot and LigASite do not necessarily correspond.

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Links to external databases:

LigPlot (hosted at the EBI):

Download FilesHelp

Several files are provided for download:

• The XML file defining the residue-ligand contacts; this file contains data on the apo and all holo-structures.
• The XML Schema file defining the semantics of the XML file
• 3D coordinates of the structure used in constructing LigASite (PISA structure file whenever available, PDB file otherwise.
• 3D coordinates of the combined binding residues in the apo structure
• 3D coordinates of the binding residues of the holo structure (only on the holo page)

Coordinate files are in PDB format.

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Hide table of related structures
Help

List of related structure, containing both the apo-structure and other holo-structures.

Column 1 gives the PDB ID and column 2 the unique ID of the ligands (holo-structures only).

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apo-structure
pdb ID
1opa Details
other holo-structures
pdb ID Ligand Unique ID
1eii RTLA_135 Details
Ligand ListHelp

Ligands present in this holo structure.

Column 1 shows the ligand HET code
Column 2 shows the name, chemical formula and (non-stereo) SMILES string.

Data in column 2 appears as 'not_found' when it is not present in the file 'pdb2smiles.xml' from www.rcsb.org.

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RET NAME: RETINAL
FORMULA: C20 H28 O1
SMILES: CC(=CC=O)C=CC=C(C)C=CC1=C(C)CCCC1(C)C
v9.7
April 2012
Interdisciplinary Research Institute, Computational Biology, Villeneuve d'Ascq, France
University College London, Biomolecular Structure and Modelling Unit, London, UK
Hospital for Sick Children and University of Toronto, Structural Biology and Biochemistry Program, Toronto, Canada
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