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Related Experiment Video

Updated: Apr 15, 2026

Author Spotlight: Improved Method for Production and Purification of Adeno-Associated Viral Vectors
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AAV2 X increases AAV6 rep/cap-driven rAAV production.

M Cao1, M Chiriva-Internati2, P L Hermonat3

  • 1Central Arkansas Veterans Healthcare System, 111J, 4300 West 7th Street, Little Rock,AR 72205, USA.

Virology
|April 4, 2015
PubMed
Summary
This summary is machine-generated.

Adeno-associated virus type 2 (AAV2) X gene enhances recombinant AAV2 DNA replication and virion production. This finding suggests AAV2 X and similar genes in other AAV types warrant further investigation.

Keywords:
Adeno-associated virus type 2Adeno-associated virus type 6Adeno-associated virus type 8DNA replicationGene therapyRep78 proteinRolling circle replicationVirion productionX geneX protein

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Area of Science:

  • Molecular Biology
  • Virology
  • Genetics

Background:

  • A novel gene, designated X, has been identified at the 3' end of the adeno-associated virus type 2 (AAV2) genome.
  • The adeno-associated virus type 6 (AAV6) genome contains a disrupted X open reading frame (ORF) with homology to AAV2 X.

Purpose of the Study:

  • To investigate the function of the AAV2 X gene in recombinant adeno-associated virus (rAAV) DNA replication and virion production.
  • To determine if AAV2 X can augment rAAV production when AAV6 rep and cap genes are provided.

Main Methods:

  • Utilized HEK293 cell lines engineered to express the AAV2 X gene.
  • Assessed the impact of AAV2 X on rAAV DNA replication and virion production in the presence of AAV6 rep and cap trans-acting functions.
  • Performed Protein BLAST searches to identify homology between AAV2 X and AAV Rep proteins.

Main Results:

  • The AAV2 X gene significantly enhanced rAAV DNA replication and virion production.
  • This augmentation was observed when driven by both AAV2 and AAV6 rep/cap systems.
  • Homology searches suggest AAV2 X may be derived from AAV8 Rep78 and share some of its activities.

Conclusions:

  • The AAV2 X gene plays a crucial role in boosting rAAV DNA replication and virion production.
  • The X genes of AAV2 and other AAV types/clades represent a potential area for further research in gene therapy applications.