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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1nb6
TRANSFERASE HEADER
HC-J4 RNA POLYMERASE COMPLEXED WITH UTP TITLE
POLYPROTEIN 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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UTP B2700
48B ARG
51B LYS
141B LYS
155B LYS
158B ARG
159B LEU
160B ILE
220B ASP
222B ARG
223B CYS
224B PHE
225B ASP
282B SER
287B THR
288B SER
291B ASN
318B ASP
319B ASP
556B SER
557B GLY
UTP A1700
48A ARG
51A LYS
141A LYS
155A LYS
158A ARG
159A LEU
160A ILE
220A ASP
221A THR
222A ARG
223A CYS
224A PHE
225A ASP
226A SER
282A SER
287A THR
288A SER
291A ASN
317A GLY
318A ASP
351A GLY
556A SER
557A GLY
MN B2002
220B ASP
221B THR
224B PHE
318B ASP
MN B2001
220B ASP
318B ASP
319B ASP
MN A1002
220A ASP
221A THR
224A PHE
318A ASP
MN A1001
220A ASP
318A ASP
319A ASP
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).

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

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apo-structure
pdb ID
1nb4 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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UTP NAME: URIDINE 5'-TRIPHOSPHATE
FORMULA: C9 H11 N2 O15 P3
SMILES: OC1C(O)C(OC1COP(O)(=O)OP(O)(=O)OP(O)(O)=O)N2C=CC(=O)NC2=O
MN NAME: MANGANESE (II) ION
FORMULA: MN1
SMILES: [Mn++]
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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