CATH Classification
Level | CATH Code | Description |
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3 | Alpha Beta |
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3.10 | Roll |
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3.10.10 | HIV Type 1 Reverse Transcriptase; Chain A, domain 1 |
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3.10.10.10 | HIV Type 1 Reverse Transcriptase, subunit A, domain 1 |
Domain Context
CATH Clusters
Superfamily | HIV Type 1 Reverse Transcriptase, subunit A, domain 1 |
Functional Family | Gag-Pol polyprotein |
Enzyme Information
3.1.26.13 |
Retroviral ribonuclease H.
based on mapping to UniProt P03366
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.
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2.7.7.7 |
DNA-directed DNA polymerase.
based on mapping to UniProt P03366
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.
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2.7.7.- |
Nucleotidyltransferases.
based on mapping to UniProt P03366
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2.7.7.49 |
RNA-directed DNA polymerase.
based on mapping to UniProt P03366
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.
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3.1.-.- |
Acting on ester bonds.
based on mapping to UniProt P03366
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3.1.13.2 |
Exoribonuclease H.
based on mapping to UniProt P03366
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.
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3.4.23.16 |
HIV-1 retropepsin.
based on mapping to UniProt P03366
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.
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UniProtKB Entries (1)
P03366 |
POL_HV1B1
Human immunodeficiency virus type 1 BH10
Gag-Pol polyprotein
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PDB Structure
PDB | 4RW6 |
External Links | |
Method | X-RAY DIFFRACTION |
Organism | |
Primary Citation |
Structure-Based Evaluation of Non-nucleoside Inhibitors with Improved Potency and Solubility That Target HIV Reverse Transcriptase Variants.
J.Med.Chem.
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