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1SYS

Crystal structure of HLA, B*4403, and peptide EEPTVIKKY
The binding interface of the protein-peptide complex is shown in grey, the peptide is shown in red. Images produced by YASARA. Note that only the interface of the protein-peptide complex is shown. Gaps between residues may occur. The image on the top is borrowed from the PDB.

Clusters

This protein-peptide complex appears in the following clusters

Cluster Images Centroid Images Centroid PDB ID Number of PDBs Threshold Structural Alignment
1SYV 211 3 Å 50 %
1SYV 211 2 Å 50 %
2AV1 187 1 Å 50 %
2CLR 172 3 Å 75 %
2CLR 172 2 Å 75 %
2CLR 169 1 Å 75 %
1SYS 1 3 Å 95 %
1SYS 1 2 Å 95 %
1SYS 1 1 Å 95 %

Properties

C
A
9
General information on the complex, such as the receptor and peptide chains. Click on the PDB icon to see this complex in the PDB

Interface Statistics

76
0
C=24 E=24 H=52
C=100
24.643
28.2163
The DSSP algorithm was used to assign secondary structure to binding site and peptide. The B-Factors are averaged across the PDB and show the flexibility of the binding site and peptide.

Binding Energy

-24.95 kCal *
-5.71 kCal *
-13.23 kCal *
The binding affinity and contribution of backbone and sidechain hydrogen bonds for the protein-peptide complex were calculated using the FoldX force field.
*: the absolute energies are not precise, however FoldX is accurate for relative energies. Learn More.

Categorization

1sysA01
d1sysa2
HLA class I histocompatibility antigen. B-44 alpha chain
P30481
1B44_HUMAN
C1-set
Note that only the receptor chain(s) is categorized.

Direct link to External Databases

AffinDB FireDB PLD PROCOGNATE PDBSum 3DID
The links are established based on the PDB Identifier of the protein-peptide complex.