Laurent Jacob (LBBE, Université de Lyon 1)

Biological Sequence Modeling with Convolutional Kernel Networks

vendredi 7 juin 2019, 9h30 - 10h30

Salle du conseil, espace Turing

The growing number of annotated biological sequences available
makes it possible to learn genotype-phenotype relationships from
data with increasingly high accuracy. When large quantities of
labeled samples are available for training a model, convolutional
neural networks can be used to predict the phenotype of
unannotated sequences with good accuracy. Unfortunately, their
performance with medium- or small-scale datasets is mitigated,
which requires inventing new data-efficient approaches. In this
paper, we introduce a hybrid approach between convolutional
neural networks and kernel methods to model biological
sequences. Our method enjoys the ability of convolutional neural
networks to learn data representations that are adapted to a
specific task, while the kernel point of view yields algorithms
that perform significantly better when the amount of training
data is small. We illustrate these advantages for transcription
factor binding prediction and protein homology detection, and we
demonstrate that our model is also simple to interpret, which is
crucial for discovering predictive motifs in sequences. The
source code is freely available at