Heme in the marine environment: from cells to the iron cycle

TitleHeme in the marine environment: from cells to the iron cycle
Publication TypeJournal Article
Year of Publication2014
AuthorsHogle S.L, Barbeau K.A, Gledhill M.
Date Published2014/04
Type of ArticleReview
ISBN Number1756-5901
Accession NumberWOS:000336843600002
Keywordsatlantic-ocean; bacteria; biosynthesis; evolution; generated superoxide; hydroxamate siderophores; nitrate reductase; phytoplankton; southern-ocean; systems; tetrapyrrole; uptake

Hemes are iron containing heterocyclic molecules important in many cellular processes. In the marine environment, hemes participate as enzymatic cofactors in biogeochemically significant processes like photosynthesis, respiration, and nitrate assimilation. Further, hemoproteins, hemes, and their analogs appear to be iron sources for some marine bacterioplankton under certain conditions. Current oceanographic analytical methodologies allow for the extraction and measurement of heme b from marine material, and a handful of studies have begun to examine the distribution of heme b in ocean basins. The study of heme in the marine environment is still in its infancy, but some trends can be gleaned from the work that has been published so far. In this review, we summarize what is known or might be inferred about the roles of heme in marine microbes as well as the few studies on heme in the marine environment that have been conducted to date. We conclude by presenting some future questions and challenges for the field.

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