Oxygen Binding Kinetics and Coordination States of Hemoglobins from Early Land Plants.

ABSTRACT: Bryophytes, comprising mosses (Bryophyta), hornworts (Anthocerotophyta), and liverworts (Marchantiophyta), represent early diverging lineages in land plant evolution. Each of these phyla contains hemoglobin genes whose functional properties remain largely unexplored. Here, we report phylogenetic analysis that confirms that bryophyte globins form a distinct monophyletic group equally distant from both class 1 and class 2 nonsymbiotic hemoglobins of vascular plants. Spectroscopic characterization revealed that all three representative bryophyte hemoglobins exhibit predominant hexacoordination in the ferrous deoxy state. This predominantly hexacoordinate structure and the auto-oxidation rates, which are similar to other nonsymbiotic hemoglobins, are inconsistent with effi

SUBMITTER: Dvorak S 

PROVIDER: S-EPMC12771424 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature