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. 2021 Nov 1;12:766509. doi: 10.3389/fpls.2021.766509

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Copyright © 2021 Petersen, Rredhi, Szyttenholm, Oldemeyer, Kottke and Mittag.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Cryptochrome categories in algae (Juhas et al., 2014; Kottke et al., 2017; Makita et al., 2021; Rredhi et al., 2021). A representative member of each of the five known categories is shown, starting with the classical plant cryptochrome of the green flagellate alga Chlamydomonas reinhardtii (Cr pCRY) and its long C-terminal extension. It is followed by the Cr animal-like CRY of the cryptochrome/photolyase family (Cr aCRY), the Cr CRY-DASH1 with its chloroplast transit peptide, the plant-like CryP of the diatom Phaeodactylum tricornutum and the dual cryptochrome DUC1 from the green picoalga Pycnococcus provasolii, a fusion of a phytochrome and a cryptochrome. Domains are indicated, including the names of the chromophores (FAD) and antenna chromophores (MTHF, 8-HDF); FAD, flavin adenine dinucleotide; MTHF, 5,10-methenyltetrahydrofolate; 8-HDF, 8-hydroxy-7,8-didemethyl-5-deazaflavin.