Journal
BIOMETALS
Volume 24, Issue 4, Pages 687-707Publisher
SPRINGER
DOI: 10.1007/s10534-011-9421-x
Keywords
Sulfate permeases; Molybdate transport; Tungsten transport; Selenate transport; Chromate transport
Categories
Funding
- Coordinacion de Investigacion Cientifica (UMSNH) [2.6]
- Consejo Nacional de Ciencia y Tecnologia-Mexico (Conacyt) [79190]
- Direccion General de Asuntos del Personal Academico (UNAM) [IN208308, IN208510]
- Conacyt
- UMSNH
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Sulfur is an essential element for microorganisms and it can be obtained from varied compounds, sulfate being the preferred source. The first step for sulfate assimilation, sulfate uptake, has been studied in several bacterial species. This article reviews the properties of different bacterial (and archaeal) transporters for sulfate, molybdate, and related oxyanions. Sulfate uptake is carried out by sulfate permeases that belong to the SulT (CysPTWA), SulP, CysP/(PiT), and CysZ families. The oxyanions molybdate, tungstate, selenate and chromate are structurally related to sulfate. Molybdate is transported mainly by the high-affinity ModABC system and tungstate by the TupABC and WtpABC systems. CysPTWA, ModABC, TupABC, and WtpABC are homologous ATP-binding cassette (ABC)-type transporters with similar organization and properties. Uptake of selenate and chromate oxyanions occurs mainly through sulfate permeases.
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