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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2q6f
HYDROLASE HEADER
CRYSTAL STRUCTURE OF INFECTIOUS BRONCHITIS VIRUS (IBV) MAIN PROTEASE IN COMPLEX WITH A MICHAEL ACCEPTOR INHIBITOR N3 TITLE
INFECTIOUS BRONCHITIS VIRUS (IBV) MAIN PROTEASE 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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3IH B1146
1A SER
24B GLY
25B ASN
26B ASN
27B LEU
41B HIS
42B VAL
44B GLY
45B LYS
51B TRP
138B PHE
139B LEU
140B ALA
141B GLY
143B CYS
161B HIS
162B HIS
163B LEU
164B GLU
165B LEU
166B PRO
170B HIS
185B ASP
186B GLU
187B GLU
188B VAL
189B ALA
190B GLN
3IH A1145
1B SER
25A ASN
26A ASN
27A LEU
41A HIS
45A LYS
138A PHE
139A LEU
140A ALA
141A GLY
142A ALA
143A CYS
161A HIS
162A HIS
163A LEU
164A GLU
165A LEU
166A PRO
170A HIS
185A ASP
186A GLU
187A GLU
188A VAL
189A ALA
190A 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):

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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
2q6d 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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3IH NAME: N-[(5-METHYLISOXAZOL-3-YL)CARBONYL]ALANYL-L-VALYL-N~1~-((1R,2Z)-4-(BENZYLOXY)-4-OXO-1-{[(3R)-2-OXOPYRROLIDIN-3-YL]METHYL}BUT-2-ENYL)-L-LEUCINAMIDE
FORMULA: C35 H48 N6 O8
SMILES: CC(C)CC(NC(=O)C(NC(=O)C(C)NC(=O)c1cc(C)on1)C(C)C)C(=O)NC(CC2CCNC2=O)C=CC(=O)OCc3ccccc3
v4.0
May 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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