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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1x55
LIGASE HEADER
CRYSTAL STRUCTURE OF ASPARAGINYL-TRNA SYNTHETASE FROM PYROCOCCUS HORIKOSHII COMPLEXED WITH ASPARAGINYL-ADENYLATE ANALOGUE TITLE
ASPARAGINYL-TRNA SYNTHETASE 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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NSS C 1
167A VAL
168A GLU
188A SER
190A GLN
193A LEU
211A ARG
213A GLU
219A ARG
220A HIS
221A LEU
224A PHE
226A HIS
228A GLU
229A LEU
230A GLU
333A TYR
357A GLU
358A ILE
359A ILE
360A GLY
361A GLY
364A ARG
401A GLY
402A PHE
403A GLY
405A GLY
407A GLU
408A ARG
419A ILE
NSS D 1
167B VAL
168B GLU
188B SER
190B GLN
193B LEU
211B ARG
213B GLU
219B ARG
220B HIS
221B LEU
224B PHE
226B HIS
228B GLU
229B LEU
230B GLU
333B TYR
357B GLU
358B ILE
359B ILE
360B GLY
361B GLY
364B ARG
402B PHE
403B GLY
405B GLY
407B GLU
408B ARG
419B ILE
PO4 C3001
211A ARG
219A ARG
220A HIS
357A GLU
408A ARG
PO4 D3001
211B ARG
219B ARG
220B HIS
357B GLU
408B ARG
MG C2001
330A LYS
348A ASP
357A GLU
360A GLY
MG D2001
330B LYS
348B ASP
357B GLU
360B GLY
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
1x56 Details
other holo-structures
pdb ID Ligand Unique ID
1x54 4ADC___1 _MGC2000 Details
4ADD___1 _MGD2000
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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NSS NAME: 5'-O-[N-(L-ASPARAGINYL)SULFAMOYL]ADENOSINE
FORMULA: C14 H21 N8 O8 S1
SMILES: NC(CC(N)=O)C(=O)NS(=O)(=O)OCC1OC(C(O)C1O)[n]2cnc3c(N)ncnc23
PO4 NAME: PHOSPHATE ION
FORMULA: O4 P1
SMILES: [O-]P([O-])([O-])=O
MG NAME: MAGNESIUM ION
FORMULA: MG1
SMILES: [Mg++]
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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