Structural evolution of the 4/1 genes and proteins in non-vascular and lower vascular plants
2015
Morozov, Sergey Y. | Milyutina, Irina A. | Bobrova, Vera K. | Ryazantsev, Dmitry Y. | Erokhina, Tatiana N. | Zavriev, Sergey K. | Agranovsky, Alexey A. | Solovyev, Andrey G. | Troitsky, Alexey V.
The 4/1 protein of unknown function is encoded by a single-copy gene in most higher plants. The 4/1 protein of Nicotiana tabacum (Nt-4/1 protein) has been shown to be alpha-helical and predominantly expressed in conductive tissues. Here, we report the analysis of 4/1 genes and the encoded proteins of lower land plants. Sequences of a number of 4/1 genes from liverworts, lycophytes, ferns and gymnosperms were determined and analyzed together with sequences available in databases. Most of the vascular plants were found to encode Magnoliophyta-like 4/1 proteins exhibiting previously described gene structure and protein properties. Identification of the 4/1-like proteins in hornworts, liverworts and charophyte algae (sister lineage to all land plants) but not in mosses suggests that 4/1 proteins are likely important for plant development but not required for a primary metabolic function of plant cell.
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