Structure of PDB 1ec2 Chain B

Receptor sequence

>1ec2B (length=99) Species: 11676 (Human immunodeficiency virus 1)

PQITLWQRPLVTIKIGGQLKEALLDTGADDTVLEEMSLPGRWKPKMIGGI
GGFIKVRQYDQILIEICGHKAIGTVLVGPTPVNIIGRNLLTQIGCTLNF

3D structure

• PDB: 1ec2 Optimization of P1-P3 groups in symmetric and asymmetric HIV-1 protease inhibitors
• Chain: B
• Resolution: 2.0 Å

Enzymatic activity

• Catalytic site (original residue number in PDB): D125 T126 G127
• Catalytic site (residue number reindexed from 1): D25 T26 G27
• Enzyme Commision number: 2.7.7.-
  2.7.7.49: RNA-directed DNA polymerase.
  2.7.7.7: DNA-directed DNA polymerase.
  3.1.-.-
  3.1.13.2: exoribonuclease H.
  3.1.26.13: retroviral ribonuclease H.
  3.4.23.16: HIV-1 retropepsin.

Interaction with ligand

Site #	Ligand	Ligand chain	Binding residues on receptor (original residue number in PDB)	Binding residues on receptor (residue number reindexed from 1)	Binding affinity
BS01	BEJ	B	L123 D125 G127 A128 D129 G148 G149 P181 V182	L23 D25 G27 A28 D29 G48 G49 P81 V82	MOAD: Ki=0.1nM PDBbind-CN: -logKd/Ki=10.00,Ki=0.10nM

Gene Ontology

Molecular Function

• GO:0004190 aspartic-type endopeptidase activity

Biological Process

• GO:0006508 proteolysis

External links

• PDB: RCSB:1ec2, PDBe:1ec2, PDBj:1ec2
• PDBsum: 1ec2
• PubMed: 12694187
• UniProt: P03366|POL_HV1B1 Gag-Pol polyprotein (Gene Name=gag-pol)