Table 1.

Penta-tricopeptide repeat proteins identified and studied in C. reinhardtii.

Name	Number of PPR motifs	Target	Function	Reference
TCB1 (PPR1)	11*	petB	Translation and stabilization of petB mRNA	Tourasse et al., 2013*; Cavaiuolo et al., 2017
MRL1 (PPR2)	12/9*	rbcL	Stabilization of rbcL mRNA	Johnson et al., 2010; Johnson, 2011; Tourasse et al., 2013*
PPR3	9	rps4, target suggested by the PPR code	Not studied yet	Tourasse et al., 2013; Cavaiuolo et al., 2017
PPR4	10	Unknown	Not studied yet	Tourasse et al., 2013
PPR5	7	Unknown	Not studied yet	Tourasse et al., 2013
PPR6	10	psbF, target suggested by the PPR code	Not studied yet	Tourasse et al., 2013; Cavaiuolo et al., 2017
PPR7	2*/4	rbcL, rpoC2, psbH, tscA, 16S rRNA, psbJ, and atpA gene clusters	Stabilization of rbcL, rpoC2, psbH, and tscA transcripts. Maturation of polycistronic mRNAs psbJ and atpA gene clusters as well as of 16S rRNA.	Tourasse et al., 2013*; Jalal et al., 2015
PPR8	8	Unknown	Not studied yet	Tourasse et al., 2013
PPR9	4	Unknown	Not studied yet	Tourasse et al., 2013
PPR10	5	Unknown	Not studied yet	Tourasse et al., 2013
PPR11	2	Unknown	Not studied yet	Tourasse et al., 2013
PPR12	2	Unknown	Not studied yet	Tourasse et al., 2013
PPR13	5	Unknown	Not studied yet	Tourasse et al., 2013
MCA1 (PPR14)	14	petA	Stabilization of petA mRNA	Raynaud et al., 2007; Loiselay et al., 2008; Boulouis et al., 2011; Tourasse et al., 2013

Asterisks (^*) indicate the specific reference of that data.