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DNA-binding domain of retroviral integrase superfamily

SCOP classification
Root:   SCOP hierarchy in SUPERFAMILY [ 0] (11)
Class:   All beta proteins [ 48724] (174)
Fold:   SH3-like barrel [ 50036] (21)
Superfamily:   DNA-binding domain of retroviral integrase [ 50122]
Families:   DNA-binding domain of retroviral integrase [ 50123]


Superfamily statistics
Genomes (9) Uniprot 2018_03 genome PDB chains (SCOP 1.75)
Domains 10 38,273 6
Proteins 10 38,272 6


Functional annotation
General category Other
Detailed category Viral proteins

Document:
Function annotation of SCOP domain superfamilies

Enzyme Commission (EC)

(show details)
EC termFDR (all)SDEO levelAnnotation (direct or inherited)
Enzyme Commission (EC)Acting on peptide bonds (peptide hydrolases)0Least InformativeDirect
Enzyme Commission (EC)Nucleotidyltransferases0Least InformativeDirect
Enzyme Commission (EC)Acting on ester bonds0Least InformativeDirect
Enzyme Commission (EC)Acting on acid anhydrides1Least InformativeInherited
Enzyme Commission (EC)Endoribonucleases producing 5'-phosphomonoesters0Moderately InformativeDirect
Enzyme Commission (EC)DNA-directed DNA polymerase0Moderately InformativeDirect
Enzyme Commission (EC)In phosphorous-containing anhydrides0.00002131Moderately InformativeDirect
Enzyme Commission (EC)Retroviral ribonuclease H0InformativeDirect
Enzyme Commission (EC)Exoribonuclease H0InformativeDirect
Enzyme Commission (EC)Aspartic endopeptidases0InformativeDirect
Enzyme Commission (EC)RNA-directed DNA polymerase0InformativeDirect
Enzyme Commission (EC)dUTP diphosphatase0.000000000007155Highly InformativeDirect

Document: EC annotation of SCOP domains

Enzyme Commission (EC)

(show details)
EC termFDR (all)SDEC levelAnnotation (direct or inherited)
Enzyme Commission (EC)Transferring phosphorus-containing groups0Least InformativeDirect
Enzyme Commission (EC)Hydrolases0Least InformativeDirect
Enzyme Commission (EC)Acting on peptide bonds (peptidases)0Moderately InformativeDirect
Enzyme Commission (EC)Nucleotidyltransferases0Moderately InformativeDirect
Enzyme Commission (EC)Acting on acid anhydrides1Moderately InformativeInherited
Enzyme Commission (EC)Exoribonucleases producing 5'-phosphomonoesters0InformativeDirect
Enzyme Commission (EC)DNA-directed DNA polymerase0InformativeDirect
Enzyme Commission (EC)Endoribonucleases producing 5'-phosphomonoesters0InformativeDirect
Enzyme Commission (EC)In phosphorus-containing anhydrides0.00000000001025InformativeDirect
Enzyme Commission (EC)dUTP diphosphatase0Highly InformativeDirect
Enzyme Commission (EC)Exoribonuclease H0Highly InformativeDirect
Enzyme Commission (EC)Retroviral ribonuclease H0Highly InformativeDirect
Enzyme Commission (EC)HIV-1 retropepsin0Highly InformativeDirect
Enzyme Commission (EC)RNA-directed DNA polymerase0Highly InformativeDirect
Enzyme Commission (EC)HIV-2 retropepsin0.00002014Highly InformativeDirect

Document: EC annotation of SCOP domains

InterPro annotation
Cross references IPR001037 SSF50122 Protein matches
Abstract

Integrase comprises three domains capable of folding independently and whose three-dimensional structures are known. However, the manner in which the N-terminal, catalytic core, and C-terminal domains interact in the holoenzyme remains obscure. Numerous studies indicate that the enzyme functions as a multimer, minimally a dimer. The integrase proteins from Human immunodeficiency virus 1 (HIV-1) and Avian sarcoma virus have been studied most carefully with respect to the structural basis of catalysis. Although the active site of Avian sarcoma virus integrase does not undergo significant conformational changes on binding the required metal cofactor, that of HIV-1 does. This active site-mediated conformational change in HIV-1 reorganises the catalytic core and C-terminal domains and appears to promote an interaction that is favourable for catalysis [PubMed10384242].

Retroviral integrase is synthesised as part of the POL polyprotein that contains; an aspartyl protease, a reverse transcriptase, RNase H and integrase. POL polyprotein undergoes specific enzymatic cleavage to yield the mature proteins. The presence of retrovirus integrase-related gene sequences in eukaryotes is known. Bacterial transposases involved in the transposition of the insertion sequence also belong to this group.

Human immunodeficiency virus integrase catalyses the incorporation of virally derived DNA into the human genome. This unique step in the virus life cycle provides a variety of points for intervention and hence is an attractive target for the development of new therapeutics for the treatment of AIDS [PubMed9161051]. Substrate recognition by the retroviral integrase enzyme is critical for retroviral integration. To catalyze this recombination event, integrase must recognize and act on two types of substrates, viral DNA and host DNA, yet the necessary interactions exhibit markedly different degrees of specificity [PubMed10384243].


InterPro database


PDBeMotif information about ligands, sequence and structure motifs
Cross references PDB entries
Ligand binding statistics
Nucleic-acid binding statistics
Occurrence of secondary structure elements
Occurrence of small 3D structural motifs

PDBeMotif resource

Jump to [ Top of page · SCOP classification · InterPro annotation · PDBeMotif links · Functional annotation · Enzyme Commission (EC) · Enzyme Commission (EC) ]

Internal database links

Browse genome assignments for this superfamily. The SUPERFAMILY hidden Markov model library has been used to carry out SCOP domain assignments to all genomes at the superfamily level.


Alignments of sequences to 4 models in this superfamily are available by clicking on the 'Alignments' icon above. PDB sequences less than 40% identical are shown by default, but any other sequence(s) may be aligned. Select PDB sequences, genome sequences, or paste in or upload your own sequences.


Browse and view proteins in genomes which have different domain combinations including a DNA-binding domain of retroviral integrase domain.


Examine the distribution of domain superfamilies, or families, across the major taxonomic kingdoms or genomes within a kingdom. This gives an immediate impression of how superfamilies, or families, are restricted to certain kingdoms of life.


Explore domain occurrence network where nodes represent genomes and edges are domain architectures (shared between genomes) containing the superfamily of interest.

There are 4 hidden Markov models representing the DNA-binding domain of retroviral integrase superfamily. Information on how the models are built, and plots showing hydrophobicity, match emmission probabilities and insertion/deletion probabilities can be inspected.


Jump to [ Top of page · SCOP classification · InterPro annotation · PDBeMotif links · Functional annotation · Enzyme Commission (EC) · Enzyme Commission (EC) · Internal database links ]