Deep generative models for T cell receptor protein sequences.

Abstract:

:Probabilistic models of adaptive immune repertoire sequence distributions can be used to infer the expansion of immune cells in response to stimulus, differentiate genetic from environmental factors that determine repertoire sharing, and evaluate the suitability of various target immune sequences for stimulation via vaccination. Classically, these models are defined in terms of a probabilistic V(D)J recombination model which is sometimes combined with a selection model. In this paper we take a different approach, fitting variational autoencoder (VAE) models parameterized by deep neural networks to T cell receptor (TCR) repertoires. We show that simple VAE models can perform accurate cohort frequency estimation, learn the rules of VDJ recombination, and generalize well to unseen sequences. Further, we demonstrate that VAE-like models can distinguish between real sequences and sequences generated according to a recombination-selection model, and that many characteristics of VAE-generated sequences are similar to those of real sequences.

journal_name

Elife

journal_title

eLife

authors

Davidsen K,Olson BJ,DeWitt WS 3rd,Feng J,Harkins E,Bradley P,Matsen FA 4th

doi

10.7554/eLife.46935

subject

Has Abstract

pub_date

2019-09-05 00:00:00

issn

2050-084X

pii

46935

journal_volume

8

pub_type

杂志文章

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