Emission of volatile halogenated compounds, speciation and localization of bromine and iodine in the brown algal genome model Ectocarpus siliculosus.
J Biol Inorg Chem
; 23(7): 1119-1128, 2018 10.
Article
in En
| MEDLINE
| ID: mdl-29523971
ABSTRACT
This study explores key features of bromine and iodine metabolism in the filamentous brown alga and genomics model Ectocarpus siliculosus. Both elements are accumulated in Ectocarpus, albeit at much lower concentration factors (2-3 orders of magnitude for iodine, and < 1 order of magnitude for bromine) than e.g. in the kelp Laminaria digitata. Iodide competitively reduces the accumulation of bromide. Both iodide and bromide are accumulated in the cell wall (apoplast) of Ectocarpus, with minor amounts of bromine also detectable in the cytosol. Ectocarpus emits a range of volatile halogenated compounds, the most prominent of which by far is methyl iodide. Interestingly, biosynthesis of this compound cannot be accounted for by vanadium haloperoxidase since the latter have not been found to catalyze direct halogenation of an unactivated methyl group or hydrocarbon so a methyl halide transferase-type production mechanism is proposed.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Bromine
/
Phaeophyceae
/
Volatile Organic Compounds
/
Hydrocarbons, Halogenated
/
Iodine
Type of study:
Prognostic_studies
Language:
En
Journal:
J Biol Inorg Chem
Journal subject:
BIOQUIMICA
Year:
2018
Document type:
Article
Affiliation country:
United kingdom