Review Article

Mechanisms of Metal Resistance and Homeostasis in Haloarchaea

Table 3

Annotated transporters for various metals in haloarchaeal genomes. Ten haloarchaeal genomes have been completely sequenced while others are partially sequenced. All these organisms have been annotated with transporters belonging to the following type of transporters-cation efflux type, P1B-type ATPases, cation diffusion facilitator (CDF) family, and ATP-binding cassette (ABC) family. The most abundant transporters were for iron followed by copper. Only one haloarchaeon, Halogeometricum borinquense , was annotated with silver transporters [135].

Transporters for metalsH.s. H.m. H.v. H.w. H.l. H.mu. H.u. H.b. H.t. H.j. N.p. N.m.

Copper ++
+
+
+
+
+
+
·+
+
+
Iron+
+
+
+
+
+
+
+
+
+
+
+
Manganese·+
+
+
+
···+
·+
+
Zinc+
+
+
+
+
+
+
·+
+
+
+
Cobalt+
+
+
+
+
+
+
+
+
+
+
+
Nickel+
··+
···+
·+
+
+
Molybdenum·+
+
·········
Arsenic+
+
+
+
+
+
+
·+
+
··
Cadmium+
+
·+
······+
+
Magnesium·+
+
···+
+
·+
··
Silver·······+
····

(+) present; (·) not annotated yet; H.s., Halobacterium sp. strain NRC-1; H.m., Haloarcula marismortui; H.v., Haloferax volcanii; H.w., Haloquadratum walsbyi; H.l., Halorubrum lacusprofundi; H.mu., Halomicrobium mukohataei; H.u., Halorhabdus utahensis; H.b., Halogeometricum borinquense; H.t., Haloterrigena turkmenica; H.j.,  Halalkalicoccus jeotgali; N.p., Natronomonas pharaonis; N.m., Natrialba magadii.