CRISPRs for Strain Tracking and Their Application to Microbiota Transplantation Data Analysis

The CRISPR Journal
Tony J Lam, Yuzhen Ye

Abstract

CRISPR-Cas systems are adaptive immune systems naturally found in bacteria and archaea. Prokaryotes use these immune systems to defend against invaders, which include phages, plasmids, and other mobile genetic elements. Relying on the integration of spacers derived from invader sequences (protospacers) into CRISPR loci (forming spacers flanked by repeats), CRISPR-Cas systems are able to store the memory of past immunological encounters. While CRISPR-Cas systems have evolved in response to invading mobile genetic elements, invaders have also developed mechanisms to avoid detection. As a result of an arms race between CRISPR-Cas systems and their targets, CRISPR arrays typically undergo rapid turnover of spacers through the acquisition and loss events. Additionally, microbiomes of different individuals rarely share spacers. Here, we present a computational pipeline, CRISPRtrack, for strain tracking based on CRISPR spacer content, and we applied it to fecal transplantation microbiome data to study the retention of donor strains in recipients. Our results demonstrate the potential use of CRISPRs as a simple yet effective tool for donor-strain tracking in fecal transplantation and as a general purpose tool for quantifying microbiome...Continue Reading

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Citations

Jun 6, 2020·Nature Reviews. Microbiology·Thea Van RossumPeer Bork
Sep 22, 2020·Therapeutic Advances in Gastroenterology·Jonathan P SegalHarry Sokol

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Datasets Mentioned

BETA
PRJEB12357
PRJEB23524

Software Mentioned

minCED
StrainFinder
CRISPRAlign
metaCRT
CRISPRone
CRISPRtrack
MEGAHIT

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