Fig. 3.—

Comparison of Andalucia and Reclinomonas mtP-RNA secondary structures. The Andalucia structure stands out as the shortest and most derived among jakobids, lacking P3, P12, and P19 pairings that are otherwise present in all jakobids (additionally, P19 is a hallmark feature of α-proteobacterial P-RNAs). The predicted 3′-end of the Andalucia mtP-RNA is adjacent to the downstream tRNA^Gly(UCC) gene, that is, 5′-tRNA processing by RNase P is responsible for 3′-maturation of its own RNA subunit. In most other jakobid mtDNAs, the tRNA^Gly(UCC) gene is located directly upstream of the rnpB gene and transcribed from the opposite strand.