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Detecting sequence signals in targeting peptides using deep learning
Life science alliance, 2019-10, Vol.2 (5), p.e201900429
[Peer Reviewed Journal]
2019 Armenteros et al. ;2019 Armenteros et al. 2019 ;ISSN: 2575-1077 ;EISSN: 2575-1077 ;DOI: 10.26508/lsa.201900429 ;PMID: 31570514
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Title:
Detecting sequence signals in targeting peptides using deep learning
Author:
Almagro Armenteros, Jose Juan
;
Salvatore, Marco
;
Emanuelsson, Olof
;
Winther, Ole
;
von Heijne, Gunnar
;
Elofsson, Arne
;
Nielsen, Henrik
Subjects:
Method
;
Methods
Is Part Of:
Life science alliance, 2019-10, Vol.2 (5), p.e201900429
Description:
In bioinformatics, machine learning methods have been used to predict features embedded in the sequences. In contrast to what is generally assumed, machine learning approaches can also provide new insights into the underlying biology. Here, we demonstrate this by presenting TargetP 2.0, a novel state-of-the-art method to identify N-terminal sorting signals, which direct proteins to the secretory pathway, mitochondria, and chloroplasts or other plastids. By examining the strongest signals from the attention layer in the network, we find that the second residue in the protein, that is, the one following the initial methionine, has a strong influence on the classification. We observe that two-thirds of chloroplast and thylakoid transit peptides have an alanine in position 2, compared with 20% in other plant proteins. We also note that in fungi and single-celled eukaryotes, less than 30% of the targeting peptides have an amino acid that allows the removal of the N-terminal methionine compared with 60% for the proteins without targeting peptide. The importance of this feature for predictions has not been highlighted before.
Publisher:
United States: Life Science Alliance LLC
Language:
English
Identifier:
ISSN: 2575-1077
EISSN: 2575-1077
DOI: 10.26508/lsa.201900429
PMID: 31570514
Source:
PubMed Central
SWEPUB Freely available online
DOAJ Directory of Open Access Journals
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