Deep generative models for T cell receptor protein sequences

eLife

Jean Feng¹  Branden J Olson¹  Philip Bradley¹  William S DeWitt III²  Elias Harkins²  Kristian Davidsen²  Frederick A Matsen IV² 

[1] Fred Hutchinson Cancer Research Center, Seattle, United States;University of Washington, Seattle, United States;

关键词: T cell receptor;    variational autoencoder;    repertoire modeling;    vaccine;    T cell expansion;   

DOI  :  10.7554/eLife.46935

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown