Comparative next-generation sequencing of adeno-associated virus inverted terminal repeats

K Petri, R Fronza, R Gabriel, C Käppel, A Nowrouzi… - …, 2014 - Taylor & Francis
K Petri, R Fronza, R Gabriel, C Käppel, A Nowrouzi, RM Linden, E Henckaerts, M Schmidt
Biotechniques, 2014Taylor & Francis
The inverted terminal repeats (ITRs) of adeno-associated virus (AAV) are notoriously difficult
to sequence owing to their high GC-content (70%) and palindromic sequences that result in
the formation of a very stable, 125 bp long, T-shaped hairpin structure. Here we evaluate the
performance of two widely used next-generation sequencing platforms, 454 GS FLX (Roche)
and MiSeq Benchtop Sequencer (Illumina), in analyzing ITRs in comparatively sequencing
linear amplification-meditated PCR (LAM-PCR) amplicons derived from AAV-concatemeric …
The inverted terminal repeats (ITRs) of adeno-associated virus (AAV) are notoriously difficult to sequence owing to their high GC-content (70%) and palindromic sequences that result in the formation of a very stable, 125 bp long, T-shaped hairpin structure. Here we evaluate the performance of two widely used next-generation sequencing platforms, 454 GS FLX (Roche) and MiSeq Benchtop Sequencer (Illumina), in analyzing ITRs in comparatively sequencing linear amplification-meditated PCR (LAM-PCR) amplicons derived from AAV-concatemeric structures. While our data indicate that both platforms can sequence complete ITRs, efficiencies (MiSeq: 0.11% of sequence reads; 454: 0.02% of reads), frequencies (MiSeq: 171 full ITRs, 454: 3 full ITRs), and rates of deviation from the derived ITR consensus sequence (MiSeq: 0.8%–1.3%; 454: 0.5%) did differ. These results suggest that next-generation sequencing platforms can be used to specifically detect ITR mutations and sequence complete ITRs.
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