CATH Classification

Domain Context

CATH Clusters

Superfamily Human Immunodeficiency Virus Type 1 Capsid Protein
Functional Family

Enzyme Information

2.7.7.-
Nucleotidyltransferases.
based on mapping to UniProt P12497
2.7.7.49
RNA-directed DNA polymerase.
based on mapping to UniProt P12497
Deoxynucleoside triphosphate + DNA(n) = diphosphate + DNA(n+1).
-!- Catalyzes RNA-template-directed extension of the 3'-end of a DNA strand by one deoxynucleotide at a time. -!- Cannot initiate a chain de novo. -!- Requires a RNA or DNA primer. -!- DNA can also serve as template. -!- See also EC 2.7.7.7.
3.4.23.16
HIV-1 retropepsin.
based on mapping to UniProt P12497
Specific for a P1 residue that is hydrophobic, and P1' variable, but often Pro.
-!- Present in human immunodeficiency virus type 1. -!- Contributes to the maturation of the viral particle, and is a target of antiviral drugs. -!- Active enzyme is a dimer of identical 11-kDa subunits. -!- Similar enzymes occur in other retroviruses. -!- Belongs to peptidase family A2.
2.7.7.7
DNA-directed DNA polymerase.
based on mapping to UniProt P12497
Deoxynucleoside triphosphate + DNA(n) = diphosphate + DNA(n+1).
-!- Catalyzes DNA-template-directed extension of the 3'-end of a DNA strand by one nucleotide at a time. -!- Cannot initiate a chain de novo. -!- Requires a primer which may be DNA or RNA. -!- See also EC 2.7.7.49.
3.1.-.-
Acting on ester bonds.
based on mapping to UniProt P12497
3.1.13.2
Exoribonuclease H.
based on mapping to UniProt P12497
3'-end directed exonucleolytic cleavage of viral RNA-DNA hybrid.
-!- This is a secondary reaction to the RNA 5'-end directed cleavage 13-19 nucleotides from the RNA end performed by EC 3.1.26.13.
3.1.26.13
Retroviral ribonuclease H.
based on mapping to UniProt P12497
Endohydrolysis of RNA in RNA/DNA hybrids. Three different cleavage modes: 1. sequence-specific internal cleavage of RNA. Human immunodeficiency virus type 1 and Moloney murine leukemia virus enzymes prefer to cleave the RNA strand one nucleotide away from the RNA-DNA junction. 2. RNA 5'-end directed cleavage 13-19 nucleotides from the RNA end. 3. DNA 3'-end directed cleavage 15-20 nucleotides away from the primer terminus.
-!- Retroviral reverse transcriptase is a multifunctional enzyme responsible for viral replication. -!- To perform this task the enzyme combines two distinct activities. -!- The polymerase domain (EC 2.7.7.49) occupies the N-terminal two- thirds of the reverse transcriptase whereas the ribonuclease H domain comprises the C-terminal remaining one-third. -!- The RNase H domain of Moloney murine leukemia virus and Human immunodeficiency virus display two metal binding sites.

UniProtKB Entries (1)

P12497
POL_HV1N5
Human immunodeficiency virus type 1 (NEW YORK-5 ISOLATE)
Gag-Pol polyprotein

PDB Structure

PDB 1AFV
External Links
Method X-RAY DIFFRACTION
Organism Escherichia
Primary Citation
Crystal structure of dimeric HIV-1 capsid protein.
Momany, C., Kovari, L.C., Prongay, A.J., Keller, W., Gitti, R.K., Lee, B.M., Gorbalenya, A.E., Tong, L., McClure, J., Ehrlich, L.S., Summers, M.F., Carter, C., Rossmann, M.G.
Nat.Struct.Biol.