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Figure 1 | BMC Biology

Figure 1

From: Casposons: a new superfamily of self-synthesizing DNA transposons at the origin of prokaryotic CRISPR-Cas immunity

Figure 1

Phylogeny of Cas1 proteins. Cas1 proteins encoded by casposons are represented in the framework of the Cas1 sequences representing the major types of CRISPR-Cas system. All clades including Cas1 from different CRISPR-Cas systems as well as Cas1-solo group 1 were collapsed for clarity (altogether, 52 non-casposon Cas1 sequences were analyzed, a representative subset of a larger collection of Cas1 sequences analyzed previously [33]; the Cas1 sequence alignment used to generate the tree is provided in Additional file 2, whereas the tree in which all branches are expanded is shown in Additional file 1: Figure S5). Numbers at the branch points represent RELL (resampling of estimated log-likelihoods)-like local support values calculated by FastTree.

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