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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1s2k
HYDROLASE HEADER
STRUCTURE OF SCP-B A MEMBER OF THE EQOLISIN FAMILY OF PEPTIDASES IN A COMPLEX WITH A TRIPEPTIDE ALA-ILE-HIS TITLE
SCYTALIDOPEPSIN B 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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TYR O1001
2K VAL
3K GLU
4E SER
5E ASN
6E TRP
10E ILE
44E GLY
45E ASP
48K GLN
136E GLU
139E GLU
150E PHE
182E THR
1001R TYR
TYR R1001
2E VAL
3E GLU
4K SER
5K ASN
6K TRP
10K ILE
44K GLY
45K ASP
48E GLN
136K GLU
139K GLU
150K PHE
182K THR
1001O TYR
TYR P1001
2I VAL
3I GLU
4G SER
5G ASN
6G TRP
10G ILE
44G GLY
45G ASP
48I GLN
136G GLU
139G GLU
150G PHE
182G THR
1001Q TYR
TYR Q1001
2G VAL
3G GLU
4I SER
5I ASN
6I TRP
10I ILE
44I GLY
45I ASP
48G GLN
136I GLU
139I GLU
150I PHE
182I THR
1001P TYR
TYR M1001
2C VAL
3C GLU
4A SER
5A ASN
6A TRP
10A ILE
44A GLY
45A ASP
48C GLN
136A GLU
139A GLU
150C PHE
182A THR
1001N TYR
TYR N1001
2A VAL
3A GLU
4C SER
5C ASN
6C TRP
10C ILE
44C GLY
45C ASP
48A GLN
136C GLU
139C GLU
150C PHE
182C THR
1001M TYR
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):

» Jmol
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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
1s2b 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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TYR NAME: L-Tyrosine
FORMULA: C9 H10 N1 O3
SMILES: NC(Cc1ccc(O)cc1)C(O)=OTYROSINE
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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