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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2c20
ISOMERASE HEADER
CRYSTAL STRUCTURE OF UDP-GLUCOSE 4-EPIMERASE TITLE
UDP-GLUCOSE 4-EPIMERASE 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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NAD A 401
8A GLY
11A GLY
12A TYR
13A ILE
14A GLY
31A VAL
32A ASP
33A ASN
35A GLN
36A THR
37A GLY
51A GLY
52A ASP
53A LEU
54A ARG
73A HIS
74A PHE
75A ALA
76A ALA
78A SER
93A ASN
116A SER
117A SER
118A THR
142A TYR
146A LYS
169A TYR
170A PHE
171A ASN
172A VAL
185A HIS
190A HIS
NAD B 401
8B GLY
11B GLY
12B TYR
13B ILE
14B GLY
31B VAL
32B ASP
33B ASN
35B GLN
36B THR
37B GLY
51B GLY
52B ASP
53B LEU
54B ARG
73B HIS
74B PHE
75B ALA
76B ALA
77B ASP
78B SER
93B ASN
116B SER
117B SER
118B THR
142B TYR
146B LYS
169B TYR
170B PHE
171B ASN
172B VAL
185B HIS
190B HIS
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):

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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
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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).

Clicking the blue 'Hide table of related structures' button removes the entire table.

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apo-structure
pdb ID
1k34 Details
other holo-structures
pdb ID Ligand Unique ID
none
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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NAD NAME: NICOTINAMIDE-ADENINE-DINUCLEOTIDE
FORMULA: C21 H27 N7 O14 P2
SMILES: NC(=O)c1ccc[n+](c1)C2OC(COP([O-])(=O)OP(O)(=O)OCC3OC(C(O)C3O)[n]4cnc5c(N)ncnc45)C(O)C2O
v6.0
October 2008
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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