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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2p85
OXIDOREDUCTASE HEADER
STRUCTURE OF HUMAN LUNG CYTOCHROME P450 2A13 WITH INDOLE BOUND IN TWO ALTERNATE CONFORMATIONS TITLE
CYTOCHROME P450 2A13 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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HEM A 500
101A ARG
116A VAL
117A ALA
128A ARG
135A LEU
182A ILE
297A ASN
298A LEU
301A ALA
302A GLY
305A THR
306A VAL
309A THR
360A GLN
365A MET
366A LEU
370A LEU
372A HIS
393A PRO
395A LEU
431A PRO
432A PHE
433A SER
437A ARG
438A TYR
439A CYS
440A PHE
441A GLY
444A LEU
445A ALA
448A GLU
449A LEU
IND A 501
107A PHE
111A PHE
117A ALA
118A PHE
209A PHE
297A ASN
300A PHE
301A ALA
305A THR
366A LEU
370A LEU
480A PHE
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
2a13 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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HEM NAME: PROTOPORPHYRIN IX CONTAINING FE
FORMULA: C34 H32 N4 O4 FE1
SMILES: CC1=C(CCC(O)=O)C2=CC3=[N+]4C(=Cc5[n]6c(C=C7C(=C(C)C8=[N+]7[Fe]46N2C1=C8)C=C)c(C)c5C=C)C(=C3CCC(O)=O)C
IND NAME: INDOLE
FORMULA: C8 H7 N1
SMILES: [nH]1ccc2ccccc12
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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